using Dapper;
using StackExchange.Profiling.Data;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Reflection.Emit;
using System.Text;

#if NETSTANDARD1_3
using DataException = System.InvalidOperationException;
#endif

namespace Dapper.Contrib.Extensions
{
    /// <summary>
    ///     The Dapper.Contrib extensions for Dapper
    /// </summary>
    public static partial class SqlMapperExtensions
    {
        /// <summary>
        ///     The function to get a database type from the given <see cref="IDbConnection" />.
        /// </summary>
        /// <param name="connection">The connection to get a database type name from.</param>
        public delegate string GetDatabaseTypeDelegate(IDbConnection connection);

        /// <summary>
        ///     The function to get a a table name from a given <see cref="Type" />
        /// </summary>
        /// <param name="type">The <see cref="Type" /> to get a table name for.</param>
        public delegate string TableNameMapperDelegate(Type type);

        private static readonly ConcurrentDictionary<RuntimeTypeHandle, IEnumerable<PropertyInfo>> KeyProperties =
            new();

        private static readonly ConcurrentDictionary<RuntimeTypeHandle, IEnumerable<PropertyInfo>> ExplicitKeyProperties
            = new();

        private static readonly ConcurrentDictionary<RuntimeTypeHandle, IEnumerable<PropertyInfo>> TypeProperties =
            new();

        private static readonly ConcurrentDictionary<RuntimeTypeHandle, IEnumerable<PropertyInfo>> ComputedProperties =
            new();

        private static readonly ConcurrentDictionary<RuntimeTypeHandle, string> GetQueries =
            new();

        private static readonly ConcurrentDictionary<RuntimeTypeHandle, string> TypeTableName =
            new();

        private static readonly ISqlAdapter DefaultAdapter = new SqlServerAdapter();

        private static readonly Dictionary<string, ISqlAdapter> AdapterDictionary
            = new()
            {
                ["sqlconnection"] = new SqlServerAdapter(),
                ["sqlceconnection"] = new SqlCeServerAdapter(),
                ["npgsqlconnection"] = new PostgresAdapter(),
                ["sqliteconnection"] = new SQLiteAdapter(),
                ["mysqlconnection"] = new MySqlAdapter(),
                ["fbconnection"] = new FbAdapter()
            };

        /// <summary>
        ///     Specify a custom table name mapper based on the POCO type name
        /// </summary>
        public static TableNameMapperDelegate TableNameMapper;

        /// <summary>
        ///     Specifies a custom callback that detects the database type instead of relying on the default strategy (the name of
        ///     the connection type object).
        ///     Please note that this callback is global and will be used by all the calls that require a database specific
        ///     adapter.
        /// </summary>
        public static GetDatabaseTypeDelegate GetDatabaseType;

        private static List<PropertyInfo> ComputedPropertiesCache(Type type)
        {
            if (ComputedProperties.TryGetValue(type.TypeHandle, out IEnumerable<PropertyInfo> pi))
            {
                return pi.ToList();
            }

            List<PropertyInfo> computedProperties = TypePropertiesCache(type)
                .Where(p => p.GetCustomAttributes(true).Any(a => a is ComputedAttribute)).ToList();

            ComputedProperties[type.TypeHandle] = computedProperties;
            return computedProperties;
        }

        private static List<PropertyInfo> ExplicitKeyPropertiesCache(Type type)
        {
            if (ExplicitKeyProperties.TryGetValue(type.TypeHandle, out IEnumerable<PropertyInfo> pi))
            {
                return pi.ToList();
            }

            List<PropertyInfo> explicitKeyProperties = TypePropertiesCache(type)
                .Where(p => p.GetCustomAttributes(true).Any(a => a is ExplicitKeyAttribute)).ToList();

            ExplicitKeyProperties[type.TypeHandle] = explicitKeyProperties;
            return explicitKeyProperties;
        }

        /// <summary>
        ///     查询主键,属性加了Key标签
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        private static List<PropertyInfo> KeyPropertiesCache(Type type)
        {
            if (KeyProperties.TryGetValue(type.TypeHandle, out IEnumerable<PropertyInfo> pi))
            {
                return pi.ToList();
            }

            List<PropertyInfo> allProperties = TypePropertiesCache(type);
            List<PropertyInfo> keyProperties = allProperties.Where(p => p.GetCustomAttributes(true).Any(a => a is KeyAttribute))
                .ToList();

            if (keyProperties.Count == 0)
            {
                PropertyInfo idProp = allProperties.Find(p =>
                    string.Equals(p.Name, "Id", StringComparison.CurrentCultureIgnoreCase));
                if (idProp != null && !idProp.GetCustomAttributes(true).Any(a => a is ExplicitKeyAttribute))
                {
                    keyProperties.Add(idProp);
                }
            }

            KeyProperties[type.TypeHandle] = keyProperties;
            return keyProperties;
        }

        private static List<PropertyInfo> TypePropertiesCache(Type type)
        {
            if (TypeProperties.TryGetValue(type.TypeHandle, out IEnumerable<PropertyInfo> pis))
            {
                return pis.ToList();
            }

            PropertyInfo[] properties = type.GetProperties().Where(IsWriteable).ToArray();
            TypeProperties[type.TypeHandle] = properties;
            return properties.ToList();
        }

        private static bool IsWriteable(PropertyInfo pi)
        {
            List<object> attributes = pi.GetCustomAttributes(typeof(WriteAttribute), false).AsList();
            if (attributes.Count != 1)
            {
                return true;
            }

            WriteAttribute writeAttribute = (WriteAttribute)attributes[0];
            return writeAttribute.Write;
        }

        private static PropertyInfo GetSingleKey<T>(string method)
        {
            Type type = typeof(T);
            List<PropertyInfo> keys = KeyPropertiesCache(type);
            //var explicitKeys = ExplicitKeyPropertiesCache(type);
            int keyCount = keys.Count; // + explicitKeys.Count;
            if (keyCount > 1)
            {
                throw new DataException(
                    $"{method}<T> only supports an entity with a single [Key]  property. [Key] Count: {keys.Count}");
            }

            if (keyCount == 0)
            {
                throw new DataException($"{method}<T> only supports an entity with a [Key]  property");
            }

            return keys[0];
        }

        /// <summary>
        ///     Returns a single entity by a single id from table "Ts".
        ///     Id must be marked with [Key] attribute.
        ///     Entities created from interfaces are tracked/intercepted for changes and used by the Update() extension
        ///     for optimal performance.
        /// </summary>
        /// <typeparam name="T">Interface or type to create and populate</typeparam>
        /// <param name="connection">Open SqlConnection</param>
        /// <param name="id">Id of the entity to get, must be marked with [Key] attribute</param>
        /// <param name="transaction">The transaction to run under, null (the default) if none</param>
        /// <param name="commandTimeout">Number of seconds before command execution timeout</param>
        /// <returns>Entity of T</returns>
        public static T Get<T>(this IDbConnection connection, dynamic id, IDbTransaction transaction = null,
            int? commandTimeout = null) where T : class
        {
            Type type = typeof(T);

            if (!GetQueries.TryGetValue(type.TypeHandle, out string sql))
            {
                PropertyInfo key = GetSingleKey<T>(nameof(Get));
                string name = GetTableName(type);

                sql = $"select * from {name} where {key.Name} = @KeyName";
                GetQueries[type.TypeHandle] = sql;
            }

            DynamicParameters dynParms = new DynamicParameters();
            dynParms.Add("@KeyName", id);

            T obj;

            if (type.IsInterface)
            {
                IDictionary<string, object> res = connection.Query(sql, dynParms).FirstOrDefault() as IDictionary<string, object>;

                if (res == null)
                {
                    return null;
                }

                obj = ProxyGenerator.GetInterfaceProxy<T>();

                foreach (PropertyInfo property in TypePropertiesCache(type))
                {
                    object val = res[property.Name];
                    if (val == null)
                    {
                        continue;
                    }

                    if (property.PropertyType.IsGenericType &&
                        property.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>))
                    {
                        Type genericType = Nullable.GetUnderlyingType(property.PropertyType);
                        if (genericType != null)
                        {
                            property.SetValue(obj, Convert.ChangeType(val, genericType), null);
                        }
                    }
                    else
                    {
                        property.SetValue(obj, Convert.ChangeType(val, property.PropertyType), null);
                    }
                }

                ((IProxy)obj).IsDirty = false; //reset change tracking and return
            }
            else
            {
                obj = connection.Query<T>(sql, dynParms, transaction, commandTimeout: commandTimeout).FirstOrDefault();
            }

            return obj;
        }

        /// <summary>
        ///     Returns a list of entites from table "Ts".
        ///     Id of T must be marked with [Key] attribute.
        ///     Entities created from interfaces are tracked/intercepted for changes and used by the Update() extension
        ///     for optimal performance.
        /// </summary>
        /// <typeparam name="T">Interface or type to create and populate</typeparam>
        /// <param name="connection">Open SqlConnection</param>
        /// <param name="transaction">The transaction to run under, null (the default) if none</param>
        /// <param name="commandTimeout">Number of seconds before command execution timeout</param>
        /// <returns>Entity of T</returns>
        public static IEnumerable<T> GetAll<T>(this IDbConnection connection, IDbTransaction transaction = null,
            int? commandTimeout = null) where T : class
        {
            Type type = typeof(T);
            Type cacheType = typeof(List<T>);

            if (!GetQueries.TryGetValue(cacheType.TypeHandle, out string sql))
            {
                GetSingleKey<T>(nameof(GetAll));
                string name = GetTableName(type);

                sql = "select * from " + name;
                GetQueries[cacheType.TypeHandle] = sql;
            }

            if (!type.IsInterface)
            {
                return connection.Query<T>(sql, null, transaction, commandTimeout: commandTimeout);
            }

            IEnumerable<dynamic> result = connection.Query(sql);
            List<T> list = new List<T>();
            foreach (IDictionary<string, object> res in result)
            {
                T obj = ProxyGenerator.GetInterfaceProxy<T>();
                foreach (PropertyInfo property in TypePropertiesCache(type))
                {
                    object val = res[property.Name];
                    if (val == null)
                    {
                        continue;
                    }

                    if (property.PropertyType.IsGenericType &&
                        property.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>))
                    {
                        Type genericType = Nullable.GetUnderlyingType(property.PropertyType);
                        if (genericType != null)
                        {
                            property.SetValue(obj, Convert.ChangeType(val, genericType), null);
                        }
                    }
                    else
                    {
                        property.SetValue(obj, Convert.ChangeType(val, property.PropertyType), null);
                    }
                }

                ((IProxy)obj).IsDirty = false; //reset change tracking and return
                list.Add(obj);
            }

            return list;
        }

        private static string GetTableName(Type type)
        {
            if (TypeTableName.TryGetValue(type.TypeHandle, out string name))
            {
                return name;
            }

            if (TableNameMapper != null)
            {
                name = TableNameMapper(type);
            }
            else
            {
#if NETSTANDARD1_3
                var info = type.GetTypeInfo();
#else
                Type info = type;
#endif
                //NOTE: This as dynamic trick falls back to handle both our own Table-attribute as well as the one in EntityFramework
                dynamic tableAttrName =
                    info.GetCustomAttribute<TableAttribute>(false)?.Name
                    ?? (info.GetCustomAttributes(false)
                        .FirstOrDefault(attr => attr.GetType().Name == "TableAttribute") as dynamic)?.Name;

                if (tableAttrName != null)
                {
                    name = tableAttrName;
                }
                else
                {
                    name = type.Name + "s";
                    if (type.IsInterface && name.StartsWith("I"))
                    {
                        name = name.Substring(1);
                    }
                }
            }

            TypeTableName[type.TypeHandle] = name;
            return name;
        }

        /// <summary>
        ///     Inserts an entity into table "Ts" and returns identity id or number of inserted rows if inserting a list.
        /// </summary>
        /// <typeparam name="T">The type to insert.</typeparam>
        /// <param name="connection">Open SqlConnection</param>
        /// <param name="entityToInsert">Entity to insert, can be list of entities</param>
        /// <param name="transaction">The transaction to run under, null (the default) if none</param>
        /// <param name="commandTimeout">Number of seconds before command execution timeout</param>
        /// <returns>Identity of inserted entity, or number of inserted rows if inserting a list</returns>
        public static long Insert<T>(this IDbConnection connection, T entityToInsert, IDbTransaction transaction = null,
            int? commandTimeout = null) where T : class
        {
            bool isList = false;
            Type type = typeof(T);

            if (type.IsArray)
            {
                isList = true;
                type = type.GetElementType();
            }
            else if (type.IsGenericType)
            {
                TypeInfo typeInfo = type.GetTypeInfo();
                bool implementsGenericIEnumerableOrIsGenericIEnumerable =
                    typeInfo.ImplementedInterfaces.Any(ti =>
                        ti.IsGenericType && ti.GetGenericTypeDefinition() == typeof(IEnumerable<>)) ||
                    typeInfo.GetGenericTypeDefinition() == typeof(IEnumerable<>);

                if (implementsGenericIEnumerableOrIsGenericIEnumerable)
                {
                    isList = true;
                    type = type.GetGenericArguments()[0];
                }
            }

            string name = GetTableName(type);
            StringBuilder sbColumnList = new StringBuilder(null);
            List<PropertyInfo> allProperties = TypePropertiesCache(type);
            List<PropertyInfo> keyProperties = KeyPropertiesCache(type);
            List<PropertyInfo> computedProperties = ComputedPropertiesCache(type);
            List<PropertyInfo> allPropertiesExceptKeyAndComputed =
                allProperties.ToList(); //.Except(keyProperties.Union(computedProperties)).ToList();

            ISqlAdapter adapter = GetFormatter(connection);

            for (int i = 0; i < allPropertiesExceptKeyAndComputed.Count; i++)
            {
                PropertyInfo property = allPropertiesExceptKeyAndComputed[i];
                adapter.AppendColumnName(sbColumnList, property.Name); //fix for issue #336
                if (i < allPropertiesExceptKeyAndComputed.Count - 1)
                {
                    sbColumnList.Append(", ");
                }
            }

            StringBuilder sbParameterList = new StringBuilder(null);
            for (int i = 0; i < allPropertiesExceptKeyAndComputed.Count; i++)
            {
                PropertyInfo property = allPropertiesExceptKeyAndComputed[i];
                sbParameterList.AppendFormat("@{0}", property.Name);
                if (i < allPropertiesExceptKeyAndComputed.Count - 1)
                {
                    sbParameterList.Append(", ");
                }
            }

            int returnVal;
            bool wasClosed = connection.State == ConnectionState.Closed;
            if (wasClosed)
            {
                connection.Open();
            }

            if (!isList) //single entity
            {
                returnVal = adapter.Insert(connection, transaction, commandTimeout, name, sbColumnList.ToString(),
                    sbParameterList.ToString(), keyProperties, entityToInsert);
            }
            else
            {
                //insert list of entities
                string cmd = $"insert into {name} ({sbColumnList}) values ({sbParameterList})";
                returnVal = connection.Execute(cmd, entityToInsert, transaction, commandTimeout);
            }

            if (wasClosed)
            {
                connection.Close();
            }

            return returnVal;
        }

        /// <summary>
        ///     Updates entity in table "Ts", checks if the entity is modified if the entity is tracked by the Get() extension.
        /// </summary>
        /// <typeparam name="T">Type to be updated</typeparam>
        /// <param name="connection">Open SqlConnection</param>
        /// <param name="entityToUpdate">Entity to be updated</param>
        /// <param name="transaction">The transaction to run under, null (the default) if none</param>
        /// <param name="commandTimeout">Number of seconds before command execution timeout</param>
        /// <returns>true if updated, false if not found or not modified (tracked entities)</returns>
        public static bool Update<T>(this IDbConnection connection, T entityToUpdate, IDbTransaction transaction = null,
            int? commandTimeout = null) where T : class
        {
            if (entityToUpdate is IProxy proxy && !proxy.IsDirty)
            {
                return false;
            }

            Type type = typeof(T);

            if (type.IsArray)
            {
                type = type.GetElementType();
            }
            else if (type.IsGenericType)
            {
                TypeInfo typeInfo = type.GetTypeInfo();
                bool implementsGenericIEnumerableOrIsGenericIEnumerable =
                    typeInfo.ImplementedInterfaces.Any(ti =>
                        ti.IsGenericType && ti.GetGenericTypeDefinition() == typeof(IEnumerable<>)) ||
                    typeInfo.GetGenericTypeDefinition() == typeof(IEnumerable<>);

                if (implementsGenericIEnumerableOrIsGenericIEnumerable)
                {
                    type = type.GetGenericArguments()[0];
                }
            }

            List<PropertyInfo> keyProperties =
                KeyPropertiesCache(type).ToList(); //added ToList() due to issue #418, must work on a list copy
            List<PropertyInfo> explicitKeyProperties = ExplicitKeyPropertiesCache(type);
            if (keyProperties.Count == 0 && explicitKeyProperties.Count == 0)
            {
                throw new ArgumentException("Entity must have at least one [Key] or [ExplicitKey] property");
            }

            string name = GetTableName(type);

            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("update {0} set ", name);

            List<PropertyInfo> allProperties = TypePropertiesCache(type);
            keyProperties.AddRange(explicitKeyProperties);
            List<PropertyInfo> computedProperties = ComputedPropertiesCache(type);
            List<PropertyInfo> nonIdProps = allProperties.Except(keyProperties.Union(computedProperties)).ToList();

            ISqlAdapter adapter = GetFormatter(connection);

            for (int i = 0; i < nonIdProps.Count; i++)
            {
                PropertyInfo property = nonIdProps[i];
                adapter.AppendColumnNameEqualsValue(sb, property.Name); //fix for issue #336
                if (i < nonIdProps.Count - 1)
                {
                    sb.Append(", ");
                }
            }

            sb.Append(" where ");
            for (int i = 0; i < keyProperties.Count; i++)
            {
                PropertyInfo property = keyProperties[i];
                adapter.AppendColumnNameEqualsValue(sb, property.Name); //fix for issue #336
                if (i < keyProperties.Count - 1)
                {
                    sb.Append(" and ");
                }
            }

            int updated = connection.Execute(sb.ToString(), entityToUpdate, commandTimeout: commandTimeout,
                transaction: transaction);
            return updated > 0;
        }

        /// <summary>
        ///     Delete entity in table "Ts".
        /// </summary>
        /// <typeparam name="T">Type of entity</typeparam>
        /// <param name="connection">Open SqlConnection</param>
        /// <param name="entityToDelete">Entity to delete</param>
        /// <param name="transaction">The transaction to run under, null (the default) if none</param>
        /// <param name="commandTimeout">Number of seconds before command execution timeout</param>
        /// <returns>true if deleted, false if not found</returns>
        public static bool Delete<T>(this IDbConnection connection, T entityToDelete, IDbTransaction transaction = null,
            int? commandTimeout = null) where T : class
        {
            if (entityToDelete == null)
            {
                throw new ArgumentException("Cannot Delete null Object", nameof(entityToDelete));
            }

            Type type = typeof(T);

            if (type.IsArray)
            {
                type = type.GetElementType();
            }
            else if (type.IsGenericType)
            {
                TypeInfo typeInfo = type.GetTypeInfo();
                bool implementsGenericIEnumerableOrIsGenericIEnumerable =
                    typeInfo.ImplementedInterfaces.Any(ti =>
                        ti.IsGenericType && ti.GetGenericTypeDefinition() == typeof(IEnumerable<>)) ||
                    typeInfo.GetGenericTypeDefinition() == typeof(IEnumerable<>);

                if (implementsGenericIEnumerableOrIsGenericIEnumerable)
                {
                    type = type.GetGenericArguments()[0];
                }
            }

            List<PropertyInfo> keyProperties =
                KeyPropertiesCache(type).ToList(); //added ToList() due to issue #418, must work on a list copy
            List<PropertyInfo> explicitKeyProperties = ExplicitKeyPropertiesCache(type);
            if (keyProperties.Count == 0 && explicitKeyProperties.Count == 0)
            {
                throw new ArgumentException("Entity must have at least one [Key] or [ExplicitKey] property");
            }

            string name = GetTableName(type);
            keyProperties.AddRange(explicitKeyProperties);

            StringBuilder sb = new StringBuilder();
            sb.AppendFormat("delete from {0} where ", name);

            ISqlAdapter adapter = GetFormatter(connection);

            for (int i = 0; i < keyProperties.Count; i++)
            {
                PropertyInfo property = keyProperties[i];
                adapter.AppendColumnNameEqualsValue(sb, property.Name); //fix for issue #336
                if (i < keyProperties.Count - 1)
                {
                    sb.Append(" and ");
                }
            }

            int deleted = connection.Execute(sb.ToString(), entityToDelete, transaction, commandTimeout);
            return deleted > 0;
        }

        /// <summary>
        ///     Delete all entities in the table related to the type T.
        /// </summary>
        /// <typeparam name="T">Type of entity</typeparam>
        /// <param name="connection">Open SqlConnection</param>
        /// <param name="transaction">The transaction to run under, null (the default) if none</param>
        /// <param name="commandTimeout">Number of seconds before command execution timeout</param>
        /// <returns>true if deleted, false if none found</returns>
        public static bool DeleteAll<T>(this IDbConnection connection, IDbTransaction transaction = null,
            int? commandTimeout = null) where T : class
        {
            Type type = typeof(T);
            string name = GetTableName(type);
            string statement = $"delete from {name}";
            int deleted = connection.Execute(statement, null, transaction, commandTimeout);
            return deleted > 0;
        }

        /// <summary>
        ///     适配数据类型
        ///     2020-11-09 集成MiniProfiler
        /// </summary>
        /// <param name="connection"></param>
        /// <returns></returns>
        private static ISqlAdapter GetFormatter(IDbConnection connection)
        {
            string name = GetDatabaseType?.Invoke(connection).ToLower()
                       ?? connection.GetType().Name.ToLower();
            if (name == "profileddbconnection")
            {
                ProfiledDbConnection pconn = (ProfiledDbConnection)connection;
                name = pconn.WrappedConnection.GetType().Name.ToLower();
            }

            return !AdapterDictionary.ContainsKey(name)
                ? DefaultAdapter
                : AdapterDictionary[name];
        }

        /// <summary>
        ///     Defined a proxy object with a possibly dirty state.
        /// </summary>
        public interface IProxy //must be kept public
        {
            /// <summary>
            ///     Whether the object has been changed.
            /// </summary>
            bool IsDirty { get; set; }
        }

        /// <summary>
        ///     Defines a table name mapper for getting table names from types.
        /// </summary>
        public interface ITableNameMapper
        {
            /// <summary>
            ///     Gets a table name from a given <see cref="Type" />.
            /// </summary>
            /// <param name="type">The <see cref="Type" /> to get a name from.</param>
            /// <returns>The table name for the given <paramref name="type" />.</returns>
            string GetTableName(Type type);
        }

        private static class ProxyGenerator
        {
            private static readonly Dictionary<Type, Type> TypeCache = new();

            private static AssemblyBuilder GetAsmBuilder(string name)
            {
                return AssemblyBuilder.DefineDynamicAssembly(new AssemblyName { Name = name }, AssemblyBuilderAccess.Run);
            }

            public static T GetInterfaceProxy<T>()
            {
                Type typeOfT = typeof(T);

                if (TypeCache.TryGetValue(typeOfT, out Type k))
                {
                    return (T)Activator.CreateInstance(k);
                }

                AssemblyBuilder assemblyBuilder = GetAsmBuilder(typeOfT.Name);

                ModuleBuilder moduleBuilder =
                    assemblyBuilder.DefineDynamicModule("SqlMapperExtensions." +
                                                        typeOfT.Name); //NOTE: to save, add "asdasd.dll" parameter

                Type interfaceType = typeof(IProxy);
                TypeBuilder typeBuilder = moduleBuilder.DefineType(typeOfT.Name + "_" + Guid.NewGuid(),
                    TypeAttributes.Public | TypeAttributes.Class);
                typeBuilder.AddInterfaceImplementation(typeOfT);
                typeBuilder.AddInterfaceImplementation(interfaceType);

                //create our _isDirty field, which implements IProxy
                MethodInfo setIsDirtyMethod = CreateIsDirtyProperty(typeBuilder);

                // Generate a field for each property, which implements the T
                foreach (PropertyInfo property in typeof(T).GetProperties())
                {
                    bool isId = property.GetCustomAttributes(true).Any(a => a is KeyAttribute);
                    CreateProperty<T>(typeBuilder, property.Name, property.PropertyType, setIsDirtyMethod, isId);
                }

#if NETSTANDARD1_3 || NETSTANDARD2_0
                var generatedType = typeBuilder.CreateTypeInfo().AsType();
#else
                Type generatedType = typeBuilder.CreateType();
#endif

                TypeCache.Add(typeOfT, generatedType);
                return (T)Activator.CreateInstance(generatedType);
            }

            private static MethodInfo CreateIsDirtyProperty(TypeBuilder typeBuilder)
            {
                Type propType = typeof(bool);
                FieldBuilder field = typeBuilder.DefineField("_" + nameof(IProxy.IsDirty), propType, FieldAttributes.Private);
                PropertyBuilder property = typeBuilder.DefineProperty(nameof(IProxy.IsDirty),
                    PropertyAttributes.None,
                    propType,
                    new[] { propType });

                const MethodAttributes getSetAttr = MethodAttributes.Public | MethodAttributes.NewSlot |
                                                    MethodAttributes.SpecialName
                                                    | MethodAttributes.Final | MethodAttributes.Virtual |
                                                    MethodAttributes.HideBySig;

                // Define the "get" and "set" accessor methods
                MethodBuilder currGetPropMthdBldr = typeBuilder.DefineMethod("get_" + nameof(IProxy.IsDirty),
                    getSetAttr,
                    propType,
                    Type.EmptyTypes);
                ILGenerator currGetIl = currGetPropMthdBldr.GetILGenerator();
                currGetIl.Emit(OpCodes.Ldarg_0);
                currGetIl.Emit(OpCodes.Ldfld, field);
                currGetIl.Emit(OpCodes.Ret);
                MethodBuilder currSetPropMthdBldr = typeBuilder.DefineMethod("set_" + nameof(IProxy.IsDirty),
                    getSetAttr,
                    null,
                    new[] { propType });
                ILGenerator currSetIl = currSetPropMthdBldr.GetILGenerator();
                currSetIl.Emit(OpCodes.Ldarg_0);
                currSetIl.Emit(OpCodes.Ldarg_1);
                currSetIl.Emit(OpCodes.Stfld, field);
                currSetIl.Emit(OpCodes.Ret);

                property.SetGetMethod(currGetPropMthdBldr);
                property.SetSetMethod(currSetPropMthdBldr);
                MethodInfo getMethod = typeof(IProxy).GetMethod("get_" + nameof(IProxy.IsDirty));
                MethodInfo setMethod = typeof(IProxy).GetMethod("set_" + nameof(IProxy.IsDirty));
                typeBuilder.DefineMethodOverride(currGetPropMthdBldr, getMethod);
                typeBuilder.DefineMethodOverride(currSetPropMthdBldr, setMethod);

                return currSetPropMthdBldr;
            }

            private static void CreateProperty<T>(TypeBuilder typeBuilder, string propertyName, Type propType,
                MethodInfo setIsDirtyMethod, bool isIdentity)
            {
                //Define the field and the property
                FieldBuilder field = typeBuilder.DefineField("_" + propertyName, propType, FieldAttributes.Private);
                PropertyBuilder property = typeBuilder.DefineProperty(propertyName,
                    PropertyAttributes.None,
                    propType,
                    new[] { propType });

                const MethodAttributes getSetAttr = MethodAttributes.Public
                                                    | MethodAttributes.Virtual
                                                    | MethodAttributes.HideBySig;

                // Define the "get" and "set" accessor methods
                MethodBuilder currGetPropMthdBldr = typeBuilder.DefineMethod("get_" + propertyName,
                    getSetAttr,
                    propType,
                    Type.EmptyTypes);

                ILGenerator currGetIl = currGetPropMthdBldr.GetILGenerator();
                currGetIl.Emit(OpCodes.Ldarg_0);
                currGetIl.Emit(OpCodes.Ldfld, field);
                currGetIl.Emit(OpCodes.Ret);

                MethodBuilder currSetPropMthdBldr = typeBuilder.DefineMethod("set_" + propertyName,
                    getSetAttr,
                    null,
                    new[] { propType });

                //store value in private field and set the isdirty flag
                ILGenerator currSetIl = currSetPropMthdBldr.GetILGenerator();
                currSetIl.Emit(OpCodes.Ldarg_0);
                currSetIl.Emit(OpCodes.Ldarg_1);
                currSetIl.Emit(OpCodes.Stfld, field);
                currSetIl.Emit(OpCodes.Ldarg_0);
                currSetIl.Emit(OpCodes.Ldc_I4_1);
                currSetIl.Emit(OpCodes.Call, setIsDirtyMethod);
                currSetIl.Emit(OpCodes.Ret);

                //TODO: Should copy all attributes defined by the interface?
                if (isIdentity)
                {
                    Type keyAttribute = typeof(KeyAttribute);
                    ConstructorInfo myConstructorInfo = keyAttribute.GetConstructor(new Type[] { });
                    CustomAttributeBuilder attributeBuilder = new CustomAttributeBuilder(myConstructorInfo, new object[] { });
                    property.SetCustomAttribute(attributeBuilder);
                }

                property.SetGetMethod(currGetPropMthdBldr);
                property.SetSetMethod(currSetPropMthdBldr);
                MethodInfo getMethod = typeof(T).GetMethod("get_" + propertyName);
                MethodInfo setMethod = typeof(T).GetMethod("set_" + propertyName);
                typeBuilder.DefineMethodOverride(currGetPropMthdBldr, getMethod);
                typeBuilder.DefineMethodOverride(currSetPropMthdBldr, setMethod);
            }
        }
    }

    /// <summary>
    ///     Specifies that this field is a explicitly set primary key in the database
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    public class ExplicitKeyAttribute : Attribute
    {
    }

    /// <summary>
    ///     Specifies whether a field is writable in the database.
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    public class WriteAttribute : Attribute
    {
        /// <summary>
        ///     Specifies whether a field is writable in the database.
        /// </summary>
        /// <param name="write">Whether a field is writable in the database.</param>
        public WriteAttribute(bool write)
        {
            Write = write;
        }

        /// <summary>
        ///     Whether a field is writable in the database.
        /// </summary>
        public bool Write { get; }
    }

    /// <summary>
    ///     Specifies that this is a computed column.
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    public class ComputedAttribute : Attribute
    {
    }
}

/// <summary>
///     The interface for all Dapper.Contrib database operations
///     Implementing this is each provider's model.
/// </summary>
public partial interface ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert);

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    void AppendColumnName(StringBuilder sb, string columnName);

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    void AppendColumnNameEqualsValue(StringBuilder sb, string columnName);
}

/// <summary>
///     The SQL Server database adapter.
/// </summary>
public partial class SqlServerAdapter : ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
    {
        string cmd = $"insert into {tableName} ({columnList}) values ({parameterList}); select @@ROWCOUNT  num";
        SqlMapper.GridReader multi = connection.QueryMultiple(cmd, entityToInsert, transaction, commandTimeout);

        dynamic first = multi.Read().FirstOrDefault();
        if (first == null || first.num == null)
        {
            return 0;
        }

        int num = (int)first.num;
        return num;
    }

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnName(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("[{0}]", columnName);
    }

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("[{0}] = @{1}", columnName, columnName);
    }
}

/// <summary>
///     The SQL Server Compact Edition database adapter.
/// </summary>
public partial class SqlCeServerAdapter : ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
    {
        string cmd = $"insert into {tableName} ({columnList}) values ({parameterList}); select @@ROWCOUNT  num";
        SqlMapper.GridReader multi = connection.QueryMultiple(cmd, entityToInsert, transaction, commandTimeout);

        dynamic first = multi.Read().FirstOrDefault();
        if (first == null || first.num == null)
        {
            return 0;
        }

        int num = (int)first.num;
        return num;
    }

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnName(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("[{0}]", columnName);
    }

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("[{0}] = @{1}", columnName, columnName);
    }
}

/// <summary>
///     The MySQL database adapter.
/// </summary>
public partial class MySqlAdapter : ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    ///     2020-11-09 影响行数改为Select ROW_COUNT()
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
    {
        string cmd = $"insert into {tableName} ({columnList}) values ({parameterList}); select ROW_COUNT()  num";
        SqlMapper.GridReader multi = connection.QueryMultiple(cmd, entityToInsert, transaction, commandTimeout);

        dynamic first = multi.Read().FirstOrDefault();
        if (first == null || first.num == null)
        {
            return 0;
        }

        int num = (int)first.num;
        return num;
    }

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnName(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("`{0}`", columnName);
    }

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("`{0}` = @{1}", columnName, columnName);
    }
}

/// <summary>
///     The Postgres database adapter.
/// </summary>
public partial class PostgresAdapter : ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
    {
        StringBuilder sb = new StringBuilder();
        sb.AppendFormat("insert into {0} ({1}) values ({2})", tableName, columnList, parameterList);

        // If no primary key then safe to assume a join table with not too much data to return
        PropertyInfo[] propertyInfos = keyProperties as PropertyInfo[] ?? keyProperties.ToArray();
        if (propertyInfos.Length == 0)
        {
            sb.Append(" RETURNING *");
        }
        else
        {
            sb.Append(" RETURNING ");
            bool first = true;
            foreach (PropertyInfo property in propertyInfos)
            {
                if (!first)
                {
                    sb.Append(", ");
                }

                first = false;
                sb.Append(property.Name);
            }
        }

        List<dynamic> results = connection.Query(sb.ToString(), entityToInsert, transaction, commandTimeout: commandTimeout)
            .ToList();

        // Return the key by assinging the corresponding property in the object - by product is that it supports compound primary keys
        int id = 0;
        foreach (PropertyInfo p in propertyInfos)
        {
            object value = ((IDictionary<string, object>)results[0])[p.Name.ToLower()];
            p.SetValue(entityToInsert, value, null);
            if (id == 0)
            {
                id = Convert.ToInt32(value);
            }
        }

        return id;
    }

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnName(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("\"{0}\"", columnName);
    }

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("\"{0}\" = @{1}", columnName, columnName);
    }
}

/// <summary>
///     The SQLite database adapter.
/// </summary>
public partial class SQLiteAdapter : ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
    {
        string cmd = $"INSERT INTO {tableName} ({columnList}) VALUES ({parameterList}); SELECT last_insert_rowid() id";
        SqlMapper.GridReader multi = connection.QueryMultiple(cmd, entityToInsert, transaction, commandTimeout);

        int id = (int)multi.Read().First().id;
        PropertyInfo[] propertyInfos = keyProperties as PropertyInfo[] ?? keyProperties.ToArray();
        if (propertyInfos.Length == 0)
        {
            return id;
        }

        PropertyInfo idProperty = propertyInfos[0];
        idProperty.SetValue(entityToInsert, Convert.ChangeType(id, idProperty.PropertyType), null);

        return id;
    }

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnName(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("\"{0}\"", columnName);
    }

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("\"{0}\" = @{1}", columnName, columnName);
    }
}

/// <summary>
///     The Firebase SQL adapeter.
/// </summary>
public partial class FbAdapter : ISqlAdapter
{
    /// <summary>
    ///     Inserts <paramref name="entityToInsert" /> into the database, returning the Id of the row created.
    /// </summary>
    /// <param name="connection">The connection to use.</param>
    /// <param name="transaction">The transaction to use.</param>
    /// <param name="commandTimeout">The command timeout to use.</param>
    /// <param name="tableName">The table to insert into.</param>
    /// <param name="columnList">The columns to set with this insert.</param>
    /// <param name="parameterList">The parameters to set for this insert.</param>
    /// <param name="keyProperties">The key columns in this table.</param>
    /// <param name="entityToInsert">The entity to insert.</param>
    /// <returns>The Id of the row created.</returns>
    public int Insert(IDbConnection connection, IDbTransaction transaction, int? commandTimeout, string tableName,
        string columnList, string parameterList, IEnumerable<PropertyInfo> keyProperties, object entityToInsert)
    {
        string cmd = $"insert into {tableName} ({columnList}) values ({parameterList})";
        connection.Execute(cmd, entityToInsert, transaction, commandTimeout);

        PropertyInfo[] propertyInfos = keyProperties as PropertyInfo[] ?? keyProperties.ToArray();
        string keyName = propertyInfos[0].Name;
        IEnumerable<dynamic> r = connection.Query($"SELECT FIRST 1 {keyName} ID FROM {tableName} ORDER BY {keyName} DESC",
            transaction: transaction, commandTimeout: commandTimeout);

        dynamic id = r.First().ID;
        if (id == null)
        {
            return 0;
        }

        if (propertyInfos.Length == 0)
        {
            return Convert.ToInt32(id);
        }

        PropertyInfo idp = propertyInfos[0];
        idp.SetValue(entityToInsert, Convert.ChangeType(id, idp.PropertyType), null);

        return Convert.ToInt32(id);
    }

    /// <summary>
    ///     Adds the name of a column.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnName(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("{0}", columnName);
    }

    /// <summary>
    ///     Adds a column equality to a parameter.
    /// </summary>
    /// <param name="sb">The string builder  to append to.</param>
    /// <param name="columnName">The column name.</param>
    public void AppendColumnNameEqualsValue(StringBuilder sb, string columnName)
    {
        sb.AppendFormat("{0} = @{1}", columnName, columnName);
    }
}