using System.Text.RegularExpressions;

namespace OASystem.Domain.Entities.Groups;

/// <summary>
/// 机票费用录入
/// </summary>
[SugarTable("Grp_AirTicketReservations")]
public class Grp_AirTicketReservations : EntityBase
{
    /************************* 2026版数据结构 *************************/

    /// <summary>
    /// 团组外键编号
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int DIId { get; set; }

    /// <summary>
    /// 记录类型：0-正常机票 1-退票记录
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int RecordType { get; set; } = 0;

    /// <summary>
    /// 关联的原始机票记录ID（退票记录指向原机票记录）
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int OriginalReservationId { get; set; }

    /// <summary>
    /// 航段代码描述
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(500)")]
    public string FlightsDescription { get; set; }

    /// <summary>
    /// 航班基础信息（去程、联程、返程）
    /// </summary>
    [SugarColumn(IsNullable = true, IsJson = true, ColumnDataType = "varchar(500)")]
    public List<AirTicketBasicInfo> AirTicketBasicInfos { get; set; } = new List<AirTicketBasicInfo>();

    /// <summary>
    /// 客人名称
    /// RecordType = 0 时，存储正常机票的客人名称；RecordType = 1 时，存储退票记录的客人名称（可能与原机票记录不同）
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(200)")]
    public string ClientName { get; set; }

    /// <summary>
    /// 客户人数
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int ClientNum { get; set; }

    /// <summary>
    /// 舱类型(数据类型外键)
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int CType { get; set; }

    /// <summary>
    /// 机票全价
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "decimal(10,2)")]
    public decimal Price { get; set; }

    /// <summary>
    /// 币种
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int Currency { get; set; }

    /// <summary>
    /// 费用信息(含退票信息)
    /// </summary>
    [SugarColumn(IsNullable = true, IsJson = true, ColumnDataType = "varchar(max)")]
    public List<CustTicketInfo> CustTicketInfos { get; set; } = new List<CustTicketInfo>();

    /// <summary>
    /// 报价说明
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(500)")]
    public string PriceDescription { get; set; }

    /************************* 2026版数据结构 *************************/

    #region 旧版兼容以前的数据结构，2026版不使用

    /// <summary>
    /// 航班号
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(100)")]
    public string FlightsCode { get; set; }

    /// <summary>
    /// 城市A-B
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(100)")]
    public string FlightsCity { get; set; }

    /// <summary>
    /// 航班日期
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(30)")]
    public string FlightsDate { get; set; }

    /// <summary>
    /// 航班时间
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(30)")]
    public string FlightsTime { get; set; }

    /// <summary>
    /// 抵达时间
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(30)")]
    public string ArrivedTime { get; set; }

    /// <summary>
    /// 是否值机
    /// 0 否 1 是
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int IsCheckIn { get; set; }
    /// <summary>
    /// 是否选座
    /// 0 否 1 是
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int IsSetSeat { get; set; }

    /// <summary>
    /// 是否购买行李服务
    /// 0 否 1 是
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int IsPackage { get; set; }
    /// <summary>
    /// 是否行李直挂
    /// 0 否 1 是
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int IsBagHandle { get; set; }
    /// <summary>
    /// 是否火车票出票选座
    /// 0 否 1 是
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int IsTrain { get; set; }

    /// <summary>
    /// 去程航班描述代码
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(500)")]
    public string LeaveDescription { get; set; }
    /// <summary>
    /// 返程航班描述代码
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(500)")]
    public string ReturnDescription { get; set; }
    /// <summary>
    /// 出票前报价
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "decimal(10,2)")]
    public decimal PrePrice { get; set; }
    /// <summary>
    /// 出票前报价币种
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int PreCurrency { get; set; }
   
    /// <summary>
    /// 机票编号
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(100)")]
    public string TicketNumber { get; set; }
    /// <summary>
    /// 机票票号
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "varchar(100)")]
    public string TicketCode { get; set; }

    /// <summary>
    /// 客人类型(数据类型外键)
    /// </summary>
    [SugarColumn(IsNullable = true, ColumnDataType = "int")]
    public int PassengerType { get; set; }
    #endregion

}

/// <summary>
/// 机票基础信息
/// </summary>
public class AirTicketBasicInfo
{
    /// <summary>
    /// 序号
    /// </summary>
    public int No { get; set; }

    /// <summary>
    /// 航班号
    /// </summary>
    public string FlightsCode { get; set; }

    /// <summary>
    /// 城市A-B
    /// </summary>
    public string FlightsCity { get; set; }

    /// <summary>
    /// 航班日期
    /// </summary>
    public string FlightsDate { get; set; }

    /// <summary>
    /// 航班时间
    /// </summary>
    public string FlightsTime { get; set; }

    /// <summary>
    /// 抵达时间
    /// </summary>
    public string ArrivedTime { get; set; }

}

/// <summary>
/// 客户机票信息
/// </summary>
public class CustTicketInfo
{
    /// <summary>
    /// 客户ID
    /// </summary>
    public int ClientId { get; set; }

    /// <summary>
    /// 舱类型(数据类型外键)
    /// </summary>
    public int CType { get; set; }

    /// <summary>
    /// 实际价格
    /// </summary>
    public decimal ActualPrice { get; set; }

    /// <summary>
    /// 机票票号
    /// </summary>
    public string TicketCode { get; set; }

    /// <summary>
    /// 机票编号
    /// </summary>
    public string TicketNumber { get; set; }

    /// <summary>
    /// 选中服务ID集合
    /// </summary>
    public List<int> SelectedServiceIds { get; set; } = new List<int>();

    /// <summary>
    /// 附加服务 json数组
    /// </summary>
    public List<AdditionalService> AdditionalServices { get; set; } = new List<AdditionalService>();

    /// <summary>
    /// 机票总费用
    /// 实际价格 + 附加服务费
    /// </summary>
    public decimal TotalTicketPrice { get; set; }

    /// <summary>
    /// 是否已退票
    /// </summary>
    public bool IsRefund { get; set; } = false;

    /// <summary>
    /// 退票记录
    /// </summary>
    public RefundRecord RefundRecord { get; set; } = new RefundRecord();

}

/// <summary>
/// 退票记录
/// </summary>
public class RefundRecord
{
    /// <summary>
    /// 退票金额
    /// </summary>
    public decimal RefundAmount { get; set; }

    /// <summary>
    /// 不可退税费
    /// </summary>
    public decimal NonRefundableTax { get; set; }

    /// <summary>
    /// 退票时间
    /// </summary>
    public string RefundTime { get; set; }

    /// <summary>
    /// 退款账户 
    /// Setdata Id
    /// </summary>
    public int RefundAccount { get; set; }

    /// <summary>
    /// 退票原因
    /// </summary>
    public string RefundReason { get; set; }
}

/// <summary>
/// 附加服务
/// </summary>
public class AdditionalService
{
    /// <summary>
    /// 服务类型Id（Sys_SetData）
    /// </summary>
    public int ServiceTypeId { get; set; }

    /// <summary>
    /// 金额
    /// </summary>
    public decimal Amount { get; set; }

}

/// <summary>
/// 航班信息
/// </summary>
public class FlightInfo
{
    public int SequenceNo { get; set; }           // 序号
    public string FlightNumber { get; set; }      // 航班号
    public string CabinClass { get; set; }        // 舱位等级
    public string WeekDay { get; set; }           // 星期（MO,TU,WE,TH,FR,SA,SU）
    public string DepartureDateRaw { get; set; }  // 原始日期字符串
    public DateTime DepartureDate { get; set; }   // 起飞日期
    public string DepartureTimeRaw { get; set; }  // 原始起飞时间
    public string DepartureTime { get; set; }     // 格式化起飞时间
    public string ArrivalTimeRaw { get; set; }    // 原始到达时间
    public string ArrivalTime { get; set; }       // 格式化到达时间
    public string DepartureAirport { get; set; }  // 起飞机场
    public string ArrivalAirport { get; set; }    // 到达机场
    public bool IsNextDayArrival { get; set; }    // 是否次日到达
    public int NextDayCount { get; set; }         // 跨天天数（+1表示第二天）
    public string Terminal { get; set; }          // 航站楼
    public string AircraftType { get; set; }      // 机型
    public string Duration { get; set; }          // 飞行时长
    public string Status { get; set; }            // 状态（HK1,KK1,TK1等）
    public string RawText { get; set; }           // 原始文本
}

/// <summary>
/// 航班解析器
/// </summary>
public static class FlightParser
{
    #region 常量定义

    /// <summary>
    /// 月份映射
    /// </summary>
    private static readonly Dictionary<string, int> MonthMap = new()
    {
        { "JAN", 1 }, { "FEB", 2 }, { "MAR", 3 }, { "APR", 4 },
        { "MAY", 5 }, { "JUN", 6 }, { "JUL", 7 }, { "AUG", 8 },
        { "SEP", 9 }, { "OCT", 10 }, { "NOV", 11 }, { "DEC", 12 }
    };

    /// <summary>
    /// 星期映射
    /// </summary>
    private static readonly Dictionary<string, string> WeekDayMap = new()
    {
        { "MO", "周一" }, { "TU", "周二" }, { "WE", "周三" }, { "TH", "周四" },
        { "FR", "周五" }, { "SA", "周六" }, { "SU", "周日" }
    };

    #endregion

    #region 主解析方法

    /// <summary>
    /// 解析航班文本（自动识别格式）
    /// </summary>
    public static List<FlightInfo> ParseFlights(string rawText, int year = 2024)
    {
        if (string.IsNullOrWhiteSpace(rawText))
            return new List<FlightInfo>();

        var lines = rawText.Trim().Split(new[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
        var result = new List<FlightInfo>();

        foreach (var line in lines)
        {
            var flight = ParseLine(line, year);
            if (flight != null)
            {
                result.Add(flight);
            }
        }

        return result.OrderBy(x => x.SequenceNo).ToList();
    }

    /// <summary>
    /// 解析单行文本（自动识别格式）
    /// </summary>
    private static FlightInfo ParseLine(string line, int year)
    {
        line = line.Trim();
        if (string.IsNullOrEmpty(line))
            return null;

        // 格式1：HU7086 C   MO18MAY  TFUHAK HK1   1605 1820          E T2T2
        if (line.Contains("HK1") || line.Contains("KK1") || line.Contains("TK1"))
        {
            return ParseFormat1(line, year);
        }

        // 格式2：1.CA431 TU27MAY TFUFRA 0135 0645 T1 1 359 11H10M
        // 格式2变体：2. LH098 TU28MAY FRAMUC 0915 1010 1 2 321 00H55M
        if (Regex.IsMatch(line, @"^\d+\.[A-Z0-9]+\s+[A-Z]{2}\d{2}[A-Z]{3}"))
        {
            return ParseFormat2(line, year);
        }

        return null;
    }

    #endregion

    #region 格式1解析

    /// <summary>
    /// 解析格式1
    /// </summary>
    private static FlightInfo ParseFormat1(string line, int year)
    {
        // 提取序号
        var seqMatch = Regex.Match(line, @"^(\d+)\.\s*");
        if (!seqMatch.Success) return null;

        var sequenceNo = int.Parse(seqMatch.Groups[1].Value);
        var content = line.Substring(seqMatch.Length).Trim();

        // 正则匹配
        var pattern = @"^([A-Z0-9]+)\s+([A-Z])\s+([A-Z]{2})(\d{2}[A-Z]{3})\s+([A-Z]{3})([A-Z]{3})\s+([A-Z]{2,3}\d?)\s+(\d{3,4})\s+(\d{3,4})(?:\+(\d+))?\s+([A-Z])\s+([A-Z0-9]+)";
        var match = Regex.Match(content, pattern);

        if (!match.Success) return null;

        var weekDay = match.Groups[3].Value;
        var dateRaw = match.Groups[4].Value;
        var departureAirport = match.Groups[5].Value;
        var arrivalAirport = match.Groups[6].Value;
        var departureTime = match.Groups[8].Value;
        var arrivalTime = match.Groups[9].Value;
        var isNextDay = match.Groups[10].Success && match.Groups[10].Value == "1";
        var terminalFlag = match.Groups[12].Value;

        return new FlightInfo
        {
            SequenceNo = sequenceNo,
            FlightNumber = match.Groups[1].Value,
            CabinClass = match.Groups[2].Value,
            WeekDay = weekDay,
            DepartureDateRaw = $"{weekDay}{dateRaw}",
            DepartureAirport = departureAirport,
            ArrivalAirport = arrivalAirport,
            DepartureTimeRaw = departureTime,
            ArrivalTimeRaw = arrivalTime,
            IsNextDayArrival = isNextDay,
            DepartureTime = FormatTime(departureTime),
            ArrivalTime = FormatTime(arrivalTime),
            DepartureDate = ParseDate(dateRaw, year),
            Status = match.Groups[7].Value,
            Terminal = terminalFlag,
            RawText = line
        };
    }

    #endregion

    #region 格式2解析（修复版）

    /// <summary>
    /// 解析格式2
    /// 示例：1.CA431 TU27MAY TFUFRA 0135 0645 T1 1 359 11H10M
    /// </summary>
    private static FlightInfo ParseFormat2(string line, int year)
    {
        // 1. 提取序号（支持 "1." 和 "1. "）
        var seqMatch = Regex.Match(line, @"^(\d+)\.\s*");
        if (!seqMatch.Success) return null;

        var sequenceNo = int.Parse(seqMatch.Groups[1].Value);
        var content = line.Substring(seqMatch.Length).Trim();

        // 2. 分割空格
        var parts = content.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
        if (parts.Length < 8) return null;

        try
        {
            var flight = new FlightInfo
            {
                SequenceNo = sequenceNo,
                RawText = line
            };

            int idx = 0;

            // 航班号
            flight.FlightNumber = parts[idx++];

            // 日期（如 TU27MAY）
            var dateRaw = parts[idx++];
            if (dateRaw.Length >= 7)
            {
                flight.WeekDay = dateRaw.Substring(0, 2);
                flight.DepartureDateRaw = dateRaw;
            }

            // 机场（如 TFUFRA 或分开的格式）
            var airportStr = parts[idx++];
            if (airportStr.Length >= 6)
            {
                // 连写格式：TFUFRA -> TFU + FRA
                flight.DepartureAirport = airportStr.Substring(0, 3);
                flight.ArrivalAirport = airportStr.Substring(3, 3);
            }
            else
            {
                // 分开格式
                flight.DepartureAirport = airportStr;
                flight.ArrivalAirport = parts[idx++];
            }

            // 起飞时间
            flight.DepartureTimeRaw = parts[idx++];
            flight.DepartureTime = FormatTime(flight.DepartureTimeRaw);

            // 到达时间（可能带 +1）
            var arrivalRaw = parts[idx++];
            if (arrivalRaw.Contains('+'))
            {
                var arrParts = arrivalRaw.Split('+');
                flight.ArrivalTimeRaw = arrParts[0];
                flight.IsNextDayArrival = true;
                if (arrParts.Length > 1 && int.TryParse(arrParts[1], out var days))
                {
                    flight.NextDayCount = days;
                }
            }
            else
            {
                flight.ArrivalTimeRaw = arrivalRaw;
            }
            flight.ArrivalTime = FormatTime(flight.ArrivalTimeRaw);

            // 航站楼（可选，以T开头）
            if (idx < parts.Length && parts[idx].StartsWith("T"))
            {
                flight.Terminal = parts[idx++];
            }

            // 序号（可选）
            if (idx < parts.Length && int.TryParse(parts[idx], out _))
            {
                // 这个序号可能是经停次数或行程序号
                idx++;
            }

            // 机型（可选，数字或数字+字母）
            if (idx < parts.Length && Regex.IsMatch(parts[idx], @"^\d{2,3}[A-Z]?$"))
            {
                flight.AircraftType = parts[idx++];
            }

            // 飞行时长（可选，包含H）
            if (idx < parts.Length && parts[idx].Contains('H'))
            {
                flight.Duration = parts[idx++];
            }

            // 解析日期
            flight.DepartureDate = ParseDate(dateRaw, year);

            return flight;
        }
        catch
        {
            return null;
        }
    }

    #endregion

    #region 辅助方法

    /// <summary>
    /// 格式化时间（1905 -> 19:05）
    /// </summary>
    private static string FormatTime(string time)
    {
        if (string.IsNullOrWhiteSpace(time))
            return string.Empty;

        // 移除 +1 等后缀
        var cleanTime = time.Split('+')[0];

        // 4位数字
        if (cleanTime.Length == 4 && int.TryParse(cleanTime, out _))
        {
            return $"{cleanTime.Substring(0, 2)}:{cleanTime.Substring(2, 2)}";
        }

        // 3位数字（905 -> 09:05）
        if (cleanTime.Length == 3 && int.TryParse(cleanTime, out _))
        {
            return $"0{cleanTime.Substring(0, 1)}:{cleanTime.Substring(1, 2)}";
        }

        // 已经是 HH:mm 格式
        if (Regex.IsMatch(cleanTime, @"^\d{1,2}:\d{2}$"))
        {
            var parts = cleanTime.Split(':');
            return $"{parts[0].PadLeft(2, '0')}:{parts[1]}";
        }

        return cleanTime;
    }

    /// <summary>
    /// 解析日期（27MAY -> 2024-05-27）
    /// </summary>
    private static DateTime ParseDate(string dateStr, int year)
    {
        if (string.IsNullOrWhiteSpace(dateStr))
            return DateTime.MinValue;

        // 移除星期前缀
        var cleanDate = Regex.Replace(dateStr, @"^[A-Z]{2}", "");

        var match = Regex.Match(cleanDate, @"(\d{2})([A-Z]{3})");
        if (match.Success)
        {
            var day = int.Parse(match.Groups[1].Value);
            var monthStr = match.Groups[2].Value;

            if (MonthMap.TryGetValue(monthStr.ToUpper(), out var month))
            {
                try
                {
                    return new DateTime(year, month, day);
                }
                catch
                {
                    return DateTime.MinValue;
                }
            }
        }

        return DateTime.MinValue;
    }

    /// <summary>
    /// 获取完整起飞时间（含时分）
    /// </summary>
    public static DateTime GetFullDepartureTime(FlightInfo flight, int year)
    {
        if (flight.DepartureDate == DateTime.MinValue || string.IsNullOrEmpty(flight.DepartureTimeRaw))
            return DateTime.MinValue;

        var time = ParseTimeToTimeSpan(flight.DepartureTimeRaw);
        return flight.DepartureDate.Add(time);
    }

    /// <summary>
    /// 获取完整到达时间（含时分和跨天）
    /// </summary>
    public static DateTime GetFullArrivalTime(FlightInfo flight, int year)
    {
        if (flight.DepartureDate == DateTime.MinValue || string.IsNullOrEmpty(flight.ArrivalTimeRaw))
            return DateTime.MinValue;

        var time = ParseTimeToTimeSpan(flight.ArrivalTimeRaw);
        var arrivalDate = flight.DepartureDate.Add(time);

        if (flight.IsNextDayArrival)
        {
            arrivalDate = arrivalDate.AddDays(flight.NextDayCount > 0 ? flight.NextDayCount : 1);
        }

        return arrivalDate;
    }

    /// <summary>
    /// 解析时间字符串为 TimeSpan
    /// </summary>
    private static TimeSpan ParseTimeToTimeSpan(string time)
    {
        var cleanTime = time.Split('+')[0];

        if (cleanTime.Length == 4)
        {
            return new TimeSpan(
                int.Parse(cleanTime.Substring(0, 2)),
                int.Parse(cleanTime.Substring(2, 2)),
                0);
        }

        if (cleanTime.Length == 3)
        {
            return new TimeSpan(
                int.Parse(cleanTime.Substring(0, 1)),
                int.Parse(cleanTime.Substring(1, 2)),
                0);
        }

        return TimeSpan.Zero;
    }

    /// <summary>
    /// 获取星期中文名称
    /// </summary>
    public static string GetWeekDayName(string weekDay)
    {
        return WeekDayMap.TryGetValue(weekDay.ToUpper(), out var name) ? name : weekDay;
    }

    #endregion
}