using FirebirdSql.Data.FirebirdClient;
using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Globalization;

namespace FreeSql.Firebird
{

    class FirebirdUtils : CommonUtils
    {
        public FirebirdUtils(IFreeSql orm) : base(orm)
        {
        }

        public override DbParameter AppendParamter(List<DbParameter> _params, string parameterName, ColumnInfo col, Type type, object value)
        {
            if (string.IsNullOrEmpty(parameterName)) parameterName = $"p_{_params?.Count}";
            var ret = new FbParameter { ParameterName = QuoteParamterName(parameterName), Value = value };
            var dbtype = (FbDbType)_orm.CodeFirst.GetDbInfo(type)?.type;
            if (col != null)
            {
                var dbtype2 = (FbDbType)_orm.DbFirst.GetDbType(new DatabaseModel.DbColumnInfo { DbTypeText = col.DbTypeText, DbTypeTextFull = col.Attribute.DbType, MaxLength = col.DbSize });
                switch (dbtype2)
                {
                    case FbDbType.Binary:
                        break;
                    default:
                        dbtype = dbtype2;
                        //if (col.DbSize != 0) ret.Size = col.DbSize;
                        if (col.DbPrecision != 0) ret.Precision = col.DbPrecision;
                        if (col.DbScale != 0) ret.Scale = col.DbScale;
                        break;
                }
            }
            ret.FbDbType = dbtype;
            _params?.Add(ret);
            return ret;
        }

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

        public override string FormatSql(string sql, params object[] args) => sql?.FormatFirebird(args);
        public override string QuoteSqlName(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, '"', '"', 1);
        public override string QuoteParamterName(string name) => $"@{(_orm.CodeFirst.IsSyncStructureToLower ? name.ToLower() : 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) => $"mod({left},{right})";
        public override string Div(string left, string right, Type leftType, Type rightType) => $"trunc({left}/{right})";
        public override string Now => "current_timestamp";
        public override string NowUtc => "current_timestamp";

        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);
            if (type == typeof(byte[])) return $"x'{CommonUtils.BytesSqlRaw(value as byte[])}'";
            if (type == typeof(TimeSpan) || type == typeof(TimeSpan?))
            {
                var ts = (TimeSpan)value;
                value = $"{Math.Floor(ts.TotalHours)}:{ts.Minutes}:{ts.Seconds}";
            }
            return FormatSql("{0}", value, 1);
        }
    }
}