using FreeSql.Internal;
using FreeSql.Internal.Model;
using Newtonsoft.Json.Linq;
using Npgsql;
using NpgsqlTypes;
using System;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Globalization;
using System.Linq;
using System.Linq.Expressions;
using System.Net;
using System.Net.Http;
using System.Numerics;
using System.Text;
using System.Threading;
using FreeSql.QuestDb;
using System.Web;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.IO;
using CsvHelper;

namespace FreeSql.QuestDb
{
    class QuestDbUtils : CommonUtils
    {
        string now_to_timezone;
        public QuestDbUtils(IFreeSql orm) : base(orm)
        {
            var timeOffset = (int)DateTime.Now.Subtract(DateTime.UtcNow).TotalMinutes;
            if (timeOffset == 0) now_to_timezone = "systimestamp()";
            else
            {
                var absTimeOffset = Math.Abs(timeOffset);
                now_to_timezone = $"to_timezone(systimestamp(),'{(timeOffset > 0 ? '+' : '-')}{(absTimeOffset / 60).ToString().PadLeft(2, '0')}:{(absTimeOffset % 60).ToString().PadLeft(2, '0')}')";
            }
        }

        static Array getParamterArrayValue(Type arrayType, object value, object defaultValue)
        {
            var valueArr = value as Array;
            var len = valueArr.GetLength(0);
            var ret = Array.CreateInstance(arrayType, len);
            for (var a = 0; a < len; a++)
            {
                var item = valueArr.GetValue(a);
                ret.SetValue(item == null ? defaultValue : getParamterValue(item.GetType(), item, 1), a);
            }

            return ret;
        }

        static Dictionary<string, Func<object, object>> dicGetParamterValue =
            new Dictionary<string, Func<object, object>>
            {
                { typeof(JToken).FullName, a => string.Concat(a) },
                { typeof(JToken[]).FullName, a => getParamterArrayValue(typeof(string), a, null) },
                { typeof(JObject).FullName, a => string.Concat(a) },
                { typeof(JObject[]).FullName, a => getParamterArrayValue(typeof(string), a, null) },
                { typeof(JArray).FullName, a => string.Concat(a) },
                { typeof(JArray[]).FullName, a => getParamterArrayValue(typeof(string), a, null) },
                { typeof(uint).FullName, a => long.Parse(string.Concat(a)) },
                { typeof(uint[]).FullName, a => getParamterArrayValue(typeof(long), a, 0) },
                { typeof(uint?[]).FullName, a => getParamterArrayValue(typeof(long?), a, null) },
                { typeof(ulong).FullName, a => decimal.Parse(string.Concat(a)) },
                { typeof(ulong[]).FullName, a => getParamterArrayValue(typeof(decimal), a, 0) },
                { typeof(ulong?[]).FullName, a => getParamterArrayValue(typeof(decimal?), a, null) },
                { typeof(ushort).FullName, a => int.Parse(string.Concat(a)) },
                { typeof(ushort[]).FullName, a => getParamterArrayValue(typeof(int), a, 0) },
                { typeof(ushort?[]).FullName, a => getParamterArrayValue(typeof(int?), a, null) },
                { typeof(byte).FullName, a => short.Parse(string.Concat(a)) },
                { typeof(byte[]).FullName, a => getParamterArrayValue(typeof(short), a, 0) },
                { typeof(byte?[]).FullName, a => getParamterArrayValue(typeof(short?), a, null) },
                { typeof(sbyte).FullName, a => short.Parse(string.Concat(a)) },
                { typeof(sbyte[]).FullName, a => getParamterArrayValue(typeof(short), a, 0) },
                { typeof(sbyte?[]).FullName, a => getParamterArrayValue(typeof(short?), a, null) },
                { typeof(char).FullName, a => string.Concat(a).Replace('\0', ' ').ToCharArray().FirstOrDefault() },
                {
                    typeof(BigInteger).FullName,
                    a => BigInteger.Parse(string.Concat(a), System.Globalization.NumberStyles.Any)
                },
                { typeof(BigInteger[]).FullName, a => getParamterArrayValue(typeof(BigInteger), a, 0) },
                { typeof(BigInteger?[]).FullName, a => getParamterArrayValue(typeof(BigInteger?), a, null) },

                {
                    typeof(NpgsqlPath).FullName, a =>
                    {
                        var path = (NpgsqlPath)a;
                        try
                        {
                            int count = path.Count;
                            return path;
                        }
                        catch
                        {
                            return new NpgsqlPath(new NpgsqlPoint(0, 0));
                        }
                    }
                },
                {
                    typeof(NpgsqlPath[]).FullName,
                    a => getParamterArrayValue(typeof(NpgsqlPath), a, new NpgsqlPath(new NpgsqlPoint(0, 0)))
                },
                { typeof(NpgsqlPath?[]).FullName, a => getParamterArrayValue(typeof(NpgsqlPath?), a, null) },

                {
                    typeof(NpgsqlPolygon).FullName, a =>
                    {
                        var polygon = (NpgsqlPolygon)a;
                        try
                        {
                            int count = polygon.Count;
                            return polygon;
                        }
                        catch
                        {
                            return new NpgsqlPolygon(new NpgsqlPoint(0, 0), new NpgsqlPoint(0, 0));
                        }
                    }
                },
                {
                    typeof(NpgsqlPolygon[]).FullName,
                    a => getParamterArrayValue(typeof(NpgsqlPolygon), a,
                        new NpgsqlPolygon(new NpgsqlPoint(0, 0), new NpgsqlPoint(0, 0)))
                },
                { typeof(NpgsqlPolygon?[]).FullName, a => getParamterArrayValue(typeof(NpgsqlPolygon?), a, null) },

                {
                    typeof((IPAddress Address, int Subnet)).FullName, a =>
                    {
                        var inet = ((IPAddress Address, int Subnet))a;
                        if (inet.Address == null) return (IPAddress.Any, inet.Subnet);
                        return inet;
                    }
                },
                {
                    typeof((IPAddress Address, int Subnet)[]).FullName,
                    a => getParamterArrayValue(typeof((IPAddress Address, int Subnet)), a, (IPAddress.Any, 0))
                },
                {
                    typeof((IPAddress Address, int Subnet)?[]).FullName,
                    a => getParamterArrayValue(typeof((IPAddress Address, int Subnet)?), a, null)
                },
            };

        static object getParamterValue(Type type, object value, int level = 0)
        {
            if (type.FullName == "System.Byte[]") return value;
            if (type.FullName == "System.Char[]") return value;
            if (type.IsArray && level == 0)
            {
                var elementType = type.GetElementType();
                Type enumType = null;
                if (elementType.IsEnum) enumType = elementType;
                else if (elementType.IsNullableType() && elementType.GenericTypeArguments.First().IsEnum)
                    enumType = elementType.GenericTypeArguments.First();
                if (enumType != null)
                    return enumType.GetCustomAttributes(typeof(FlagsAttribute), false).Any()
                        ? getParamterArrayValue(typeof(long), value,
                            elementType.IsEnum ? null : enumType.CreateInstanceGetDefaultValue())
                        : getParamterArrayValue(typeof(int), value,
                            elementType.IsEnum ? null : enumType.CreateInstanceGetDefaultValue());
                return dicGetParamterValue.TryGetValue(type.FullName, out var trydicarr) ? trydicarr(value) : value;
            }

            if (type.IsNullableType()) type = type.GenericTypeArguments.First();
            if (type.IsEnum) return (int)value;
            if (dicGetParamterValue.TryGetValue(type.FullName, out var trydic)) return trydic(value);
            return value;
        }

        public override DbParameter AppendParamter(List<DbParameter> _params, string parameterName, ColumnInfo col,
            Type type, object value)
        {
            if (string.IsNullOrEmpty(parameterName)) parameterName = $"p_{_params?.Count}";
            if (value != null) value = getParamterValue(type, value);
            var ret = new NpgsqlParameter { ParameterName = QuoteParamterName(parameterName), Value = value };

            if (value != null && (value.GetType().IsEnum ||
                                  value.GetType().GenericTypeArguments.FirstOrDefault()?.IsEnum == true))
            {
                ret.DataTypeName = "";
            }
            else
            {
                var tp = _orm.CodeFirst.GetDbInfo(type)?.type;
                if (tp != null)
                {
                    var ntp = (NpgsqlDbType)tp;
                    switch (ntp)
                    {
                        case NpgsqlDbType.Boolean:
                            ret.NpgsqlDbType = NpgsqlDbType.Text;
                            ret.DbType = DbType.String;
                            ret.Value = string.Concat(value);
                            break;
                        case NpgsqlDbType.Numeric:
                            ret.NpgsqlDbType = NpgsqlDbType.Double;
                            ret.DbType = DbType.Double;
                            ret.Value = Convert.ToDouble(FormatSql("{0}", value));
                            break;
                        default:
                            ret.NpgsqlDbType = (NpgsqlDbType)tp.Value;
                            break;
                    }
                }

                if (col != null)
                {
                    var dbtype = (NpgsqlDbType)_orm.DbFirst.GetDbType(new DatabaseModel.DbColumnInfo
                        { DbTypeText = col.DbTypeText });
                    if (dbtype != NpgsqlDbType.Unknown)
                    {
                        ret.NpgsqlDbType = dbtype;
                        //if (col.DbSize != 0) ret.Size = col.DbSize;
                        if (col.DbPrecision != 0)
                            ret.Precision = col.DbPrecision;
                        if (col.DbScale != 0)
                            ret.Scale = col.DbScale;
                    }
                }
            }


            _params?.Add(ret);
            return ret;
        }

        public override DbParameter[] GetDbParamtersByObject(string sql, object obj) =>
            Utils.GetDbParamtersByObject<NpgsqlParameter>(sql, obj, "@", (name, type, value) =>
            {
                if (value != null) value = getParamterValue(type, value);
                var ret = new NpgsqlParameter { ParameterName = $"@{name}", Value = value };
                //if (value.GetType().IsEnum || value.GetType().GenericTypeArguments.FirstOrDefault()?.IsEnum == true) {
                //	ret.DataTypeName = "";
                //} else {
                var tp = _orm.CodeFirst.GetDbInfo(type)?.type;
                if (tp != null) ret.NpgsqlDbType = (NpgsqlDbType)tp.Value;
                //}
                return ret;
            });

        public override string FormatSql(string sql, params object[] args) => sql?.FormatQuestDb(args);

        public override string QuoteSqlNameAdapter(params string[] name)
        {
            if (name.Length == 1)
            {
                var nametrim = name[0].Trim();
                if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
                    return nametrim; //原生SQL
                if (nametrim.StartsWith("\"") && nametrim.EndsWith("\""))
                    return nametrim;
                return $"\"{nametrim.Replace(".", "\".\"")}\"";
            }

            return $"\"{string.Join("\".\"", name)}\"";
        }

        public override string TrimQuoteSqlName(string name)
        {
            var nametrim = name.Trim();
            if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
                return nametrim; //原生SQL
            return $"{nametrim.Trim('"').Replace("\".\"", ".").Replace(".\"", ".")}";
        }

        public override string[] SplitTableName(string name) => GetSplitTableNames(name, '"', '"', 2);
        public override string QuoteParamterName(string name) => $"@{name}";
        public override string IsNull(string sql, object value) => $"coalesce({sql}, {value})";
        public override string StringConcat(string[] objs, Type[] types) => $"{string.Join(" || ", objs)}";
        public override string Mod(string left, string right, Type leftType, Type rightType) => $"{left} % {right}";
        public override string Div(string left, string right, Type leftType, Type rightType) => $"{left} / {right}";
        public override string Now => now_to_timezone;
        public override string NowUtc => "systimestamp()";

        public override string QuoteWriteParamterAdapter(Type type, string paramterName) => paramterName;
        protected override string QuoteReadColumnAdapter(Type type, Type mapType, string columnName) => columnName;
        public override string GetNoneParamaterSqlValue(List<DbParameter> specialParams, string specialParamFlag,
            ColumnInfo col, Type type, object value)
        {
            if (value == null) return "NULL";
            if (type.IsNumberType()) return string.Format(CultureInfo.InvariantCulture, "{0}", value);

            value = getParamterValue(type, value);
            var type2 = value.GetType();
            if (type2 == typeof(byte[])) return $"'\\x{CommonUtils.BytesSqlRaw(value as byte[])}'";
            else if (dicGetParamterValue.ContainsKey(type2.FullName))
            {
                value = string.Concat(value);
            }

            return FormatSql("{0}", value, 1);
        }
    }
}

namespace FreeSql
{
    public enum SampleUnit
    {
        microsecond = 'U',
        millisecond = 'T',
        second = 's',
        minute = 'm',
        hour = 'h',
        day = 'd',
        month = 'M',
        year = 'y',
    }
}