using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Data.Odbc;
using System.Linq;
using System.Linq.Expressions;
using System.Text;

namespace FreeSql.Odbc.Default
{

    public class OdbcUtils : CommonUtils
    {
        public OdbcUtils(IFreeSql orm) : base(orm) { }
        public OdbcAdapter Adapter => _orm.GetOdbcAdapter();

        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?.Equals(DateTime.MinValue) == true) value = new DateTime(1970, 1, 1);
            var ret = new OdbcParameter { ParameterName = QuoteParamterName(parameterName), Value = value };
            var tp = _orm.CodeFirst.GetDbInfo(type)?.type;
            if (tp != null) ret.OdbcType = (OdbcType)tp.Value;
            _params?.Add(ret);
            return ret;
        }

        public override DbParameter[] GetDbParamtersByObject(string sql, object obj) =>
            Utils.GetDbParamtersByObject<OdbcParameter>(sql, obj, null, (name, type, value) =>
            {
                if (value?.Equals(DateTime.MinValue) == true) value = new DateTime(1970, 1, 1);
                var ret = new OdbcParameter { ParameterName = $"@{name}", Value = value };
                var tp = _orm.CodeFirst.GetDbInfo(type)?.type;
                if (tp != null) ret.OdbcType = (OdbcType)tp.Value;
                return ret;
            });

        public override string FormatSql(string sql, params object[] args) => sql?.FormatOdbc(args);
        public override string QuoteSqlName(string name)
        {
            var nametrim = name.Trim();
            if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
                return nametrim; //原生SQL
            //return $"[{nametrim.TrimStart('[').TrimEnd(']').Replace(".", "].[")}]";
            return $"{Adapter.QuoteSqlNameLeft}{nametrim.TrimStart(Adapter.QuoteSqlNameLeft).TrimEnd(Adapter.QuoteSqlNameRight).Replace(".", $"{Adapter.QuoteSqlNameRight}.{Adapter.QuoteSqlNameLeft}")}{Adapter.QuoteSqlNameRight}";
        }
        public override string TrimQuoteSqlName(string name)
        {
            var nametrim = name.Trim();
            if (nametrim.StartsWith("(") && nametrim.EndsWith(")"))
                return nametrim; //原生SQL
            //return $"{nametrim.TrimStart('[').TrimEnd(']').Replace("].[", ".").Replace(".[", ".")}";
            return $"{nametrim.TrimStart(Adapter.QuoteSqlNameLeft).TrimEnd(Adapter.QuoteSqlNameRight).Replace($"{Adapter.QuoteSqlNameRight}.{Adapter.QuoteSqlNameLeft}", ".").Replace($".{Adapter.QuoteSqlNameLeft}", ".")}";
        }
        public override string QuoteParamterName(string name) => $"@{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : name)}";
        public override string IsNull(string sql, object value) => Adapter.IsNullSql(sql, value);
        public override string StringConcat(string[] objs, Type[] types) => Adapter.ConcatSql(objs, types);
        public override string Mod(string left, string right, Type leftType, Type rightType) => Adapter.Mod(left, right, leftType, rightType);
        public override string Div(string left, string right, Type leftType, Type rightType) => Adapter.Div(left, right, leftType, rightType);

        public override string QuoteWriteParamter(Type type, string paramterName) => paramterName;
        public override string QuoteReadColumn(Type type, string columnName) => Adapter.FieldSql(type, columnName);

        public override string GetNoneParamaterSqlValue(List<DbParameter> specialParams, Type type, object value)
        {
            if (value == null) return "NULL";
            if (type == typeof(byte[])) return Adapter.ByteRawSql(value);
            return FormatSql("{0}", value, 1);
        }
    }
}