using System.Data;
using System.Security.Cryptography;
using System.Text;
using Milimoe.FunGame.Core.Api.Transmittal;
using Milimoe.FunGame.Core.Api.Utility;
using Oshima.FunGame.OshimaServers.Model;

namespace Oshima.FunGame.WebAPI.Services
{
    public class CSBettingSQLService
    {
        public static string GetEventsOverview()
        {
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                sql.ExecuteDataSet("SELECT id, name, status, start_time FROM csbetting_events ORDER BY start_time DESC");
                if (!sql.Success || sql.DataSet.Tables.Count == 0) return "暂无赛事。";
                StringBuilder sb = new();
                foreach (DataRow row in sql.DataSet.Tables[0].Rows)
                {
                    int id = Convert.ToInt32(row["id"]);
                    string name = row["name"].ToString() ?? "";
                    int status = Convert.ToInt32(row["status"]);
                    string statusStr = status switch { 0 => "未开始", 1 => "进行中", 2 => "已结束", _ => "未知" };
                    sb.AppendLine($"🏆 [{id}] {name.CreateCmdInput($"赛事详情 {id}")} ({statusStr})");
                }
                return sb.ToString().TrimEnd();
            }
            return "数据库连接失败。";
        }

        public static string GetEventDetail(int eventId)
        {
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                sql.Parameters["@id"] = eventId;
                sql.ExecuteDataSet("SELECT * FROM csbetting_events WHERE id = @id");
                if (!sql.Success || sql == null || sql.DataSet.Tables[0].Rows.Count == 0) return "赛事不存在。";
                DataRow evt = sql.DataSet.Tables[0].Rows[0];
                string name = evt["name"].ToString() ?? "";
                int status = Convert.ToInt32(evt["status"]);
                DateTime start = Convert.ToDateTime(evt["start_time"]);
                DateTime end = Convert.ToDateTime(evt["end_time"]);
                string statusStr = status switch { 0 => "未开始", 1 => "进行中", 2 => "已结束", _ => "未知" };

                StringBuilder sb = new();
                sb.AppendLine($"赛事：{name}");
                sb.AppendLine($"状态：{statusStr}");
                sb.AppendLine($"时间：{start:yyyy/MM/dd} ~ {end:yyyy/MM/dd}");
                sb.AppendLine("比赛列表：");

                sql.Parameters["@eid"] = eventId;
                sql.ExecuteDataSet("SELECT id, team1_name, team2_name, status, bet_deadline, stage FROM csbetting_matches WHERE event_id = @eid ORDER BY start_time");
                if (sql.Success && sql.DataSet?.Tables[0].Rows.Count > 0)
                {
                    foreach (DataRow row in sql.DataSet.Tables[0].Rows)
                    {
                        int mid = Convert.ToInt32(row["id"]);
                        string t1 = row["team1_name"].ToString() ?? "";
                        string t2 = row["team2_name"].ToString() ?? "";
                        int mstatus = Convert.ToInt32(row["status"]);
                        DateTime deadline = Convert.ToDateTime(row["bet_deadline"]);
                        string stage = row["stage"].ToString() ?? "";
                        string mStatusStr = mstatus switch { 0 => "未开始", 1 => "进行中", 2 => "已结束", _ => "未知" };
                        string matchLabel = $"{t1} vs {t2}";
                        string clickableMatch = matchLabel.CreateCmdInput($"比赛详情 {mid}");
                        sb.AppendLine($"  [{mid}] {(stage != "" ? $"{stage} - " : "")} {clickableMatch} (状态：{mStatusStr}, 截止：{deadline:MM-dd HH:mm})");
                    }
                }
                return sb.ToString();
            }
            return "数据库连接失败。";
        }

        public static string GetMatchDetail(int matchId)
        {
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                sql.Parameters["@mid"] = matchId;
                sql.ExecuteDataSet("SELECT * FROM csbetting_matches WHERE id = @mid");
                if (!sql.Success || sql.DataSet.Tables[0].Rows.Count == 0) return "比赛不存在。";
                DataRow row = sql.DataSet.Tables[0].Rows[0];
                long eventId = Convert.ToInt64(row["event_id"]);
                string t1 = row["team1_name"].ToString() ?? "";
                string t2 = row["team2_name"].ToString() ?? "";
                int status = Convert.ToInt32(row["status"]);
                DateTime start = Convert.ToDateTime(row["start_time"]);
                DateTime deadline = Convert.ToDateTime(row["bet_deadline"]);
                string stage = row["stage"].ToString() ?? "";
                string available = row["available_options"]?.ToString() ?? "[]";

                string eventName = "";
                sql.Parameters["@eid"] = eventId;
                DataRow? rowEvent = sql.ExecuteDataRow("SELECT name FROM csbetting_events WHERE id = @eid");
                if (rowEvent != null)
                {
                    eventName = rowEvent["name"].ToString() ?? "";
                }

                string statusStr = status switch { 0 => "未开始", 1 => "进行中", 2 => "已结束", _ => "未知" };
                StringBuilder sb = new();
                sb.AppendLine($"比赛 #{matchId}");
                if (eventName.Trim() != "")
                {
                    sb.AppendLine($"> {eventName.CreateCmdInput($"赛事详情 {eventId}")}");
                    if (stage.Trim() != "") sb.AppendLine($"{stage}");
                    sb.AppendLine();
                }
                sb.AppendLine($"{t1} vs {t2}".CreateCmdInput($"比赛详情 {matchId}"));
                sb.AppendLine($"开赛：{start:yyyy/MM/dd HH:mm}");
                sb.AppendLine($"竞猜截止：{deadline:yyyy/MM/dd HH:mm}");
                sb.AppendLine($"状态：{statusStr}");
                sb.AppendLine($"可用选项：");
                if (available.Contains("team1_win")) sb.AppendLine($"  - {t1}胜 (x 2.5)");
                if (available.Contains("team2_win")) sb.AppendLine($"  - {t2}胜 (x 2.5)");
                if (available.Contains("score")) sb.AppendLine($"  - 精确比分 (x 3.5)");
                if (available.Contains("mvp")) sb.AppendLine($"  - 赛事MVP (x 3.5)");
                return sb.ToString();
            }
            return "数据库连接失败。";
        }

        public static bool PlaceBet(long uid, int matchId, string option, long amount, out string error)
        {
            error = "";
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                // 检查比赛
                sql.Parameters["@mid"] = matchId;
                sql.ExecuteDataSet("SELECT * FROM csbetting_matches WHERE id = @mid");
                if (!sql.Success || sql.DataSet.Tables[0].Rows.Count == 0)
                {
                    error = "比赛不存在。";
                    return false;
                }
                DataRow row = sql.DataSet.Tables[0].Rows[0];
                int status = Convert.ToInt32(row["status"]);
                DateTime deadline = Convert.ToDateTime(row["bet_deadline"]);
                if (status != 0 || DateTime.Now > deadline)
                {
                    error = "当前比赛已截止或非投注期。";
                    return false;
                }

                string available = row["available_options"]?.ToString() ?? "[]";
                int optionType;
                string optionValue = option;
                if (option == "team1" && available.Contains("team1_win"))
                    optionType = 1;
                else if (option == "team2" && available.Contains("team2_win"))
                    optionType = 2;
                else if (option.StartsWith("score:") && available.Contains("score"))
                {
                    optionType = 3;
                    optionValue = option.Replace("score:", "").Trim();
                }
                else if (option.StartsWith("mvp:") && available.Contains("mvp"))
                {
                    optionType = 4;
                    optionValue = option.Replace("mvp:", "").Trim();
                }
                else
                {
                    error = "无效的投注选项。";
                    return false;
                }

                // 写入投注记录
                sql.Parameters["@uid"] = uid;
                sql.Parameters["@mid"] = matchId;
                sql.Parameters["@otype"] = optionType;
                sql.Parameters["@oval"] = optionValue;
                sql.Parameters["@amt"] = amount;
                sql.Parameters["@time"] = DateTime.Now;
                sql.Execute("INSERT INTO csbetting_bet_records (user_id, match_id, option_type, option_value, amount, bet_time) VALUES (@uid, @mid, @otype, @oval, @amt, @time)");
                if (!sql.Success)
                {
                    error = "投注记录写入失败。";
                    return false;
                }
                return true;
            }
            error = "数据库连接失败。";
            return false;
        }

        public static string SettleMatch(int matchId, string winner, string result)
        {
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                sql.Parameters["@mid"] = matchId;
                sql.ExecuteDataSet("SELECT * FROM csbetting_matches WHERE id = @mid");
                if (!sql.Success || sql.DataSet.Tables[0].Rows.Count == 0)
                    return "比赛不存在。";
                DataRow row = sql.DataSet.Tables[0].Rows[0];
                int status = Convert.ToInt32(row["status"]);
                if (status == 2)
                    return "比赛已结算。";

                int winTeam;
                if (winner == "team1") winTeam = 1;
                else if (winner == "team2") winTeam = 2;
                else return "请指定获胜方为 team1 或 team2。";

                // 更新比赛结果
                sql.Parameters["@res"] = result;
                sql.Parameters["@win"] = winTeam;
                sql.Parameters["@mid"] = matchId;
                sql.Execute("UPDATE csbetting_matches SET status=2, result=@res, winner=@win WHERE id=@mid");

                // 获取所有未结算投注
                sql.Parameters["@mid"] = matchId;
                sql.ExecuteDataSet("SELECT * FROM csbetting_bet_records WHERE match_id=@mid AND is_settled=0");
                if (sql.Success && sql.DataSet.Tables[0].Rows.Count > 0)
                {
                    foreach (DataRow bet in sql.DataSet.Tables[0].Rows)
                    {
                        long betId = Convert.ToInt64(bet["id"]);
                        int otype = Convert.ToInt32(bet["option_type"]);
                        string ovalue = bet["option_value"].ToString() ?? "";
                        long amount = Convert.ToInt64(bet["amount"]);

                        bool win = false;
                        if (otype == 1 && winTeam == 1) win = true;
                        else if (otype == 2 && winTeam == 2) win = true;
                        else if (otype == 3 && ovalue == result) win = true;

                        long payout = 0;
                        string note = "未中奖";
                        if (win)
                        {
                            double odds = otype switch { 2 or 3 => 3.5, _ => 2.5 };
                            payout = (long)(amount * odds);
                            note = "中奖";
                        }
                        sql.Parameters["@payout"] = payout;
                        sql.Parameters["@note"] = note;
                        sql.Parameters["@bid"] = betId;
                        sql.Execute("UPDATE csbetting_bet_records SET is_settled=1, payout=@payout, result_note=@note WHERE id=@bid");
                    }
                }
                return $"比赛 {matchId} 结算完成。";
            }
            return "数据库连接失败。";
        }

        public static string GetMyBets(long uid)
        {
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                sql.Parameters["@uid"] = uid;
                sql.ExecuteDataSet(@"
                SELECT br.id, br.match_id, br.option_type, br.option_value, br.amount, br.bet_time,
                       br.is_settled, br.payout, br.is_claimed, br.result_note,
                       m.team1_name, m.team2_name
                FROM csbetting_bet_records br
                JOIN csbetting_matches m ON br.match_id = m.id
                WHERE br.user_id = @uid
                ORDER BY br.bet_time DESC");
                if (!sql.Success || sql.DataSet.Tables[0].Rows.Count == 0) return "你还没有任何竞猜记录。";
                StringBuilder sb = new();
                foreach (DataRow row in sql.DataSet.Tables[0].Rows)
                {
                    long bid = Convert.ToInt64(row["id"]);
                    long mid = Convert.ToInt64(row["match_id"]);
                    string t1 = row["team1_name"].ToString() ?? "";
                    string t2 = row["team2_name"].ToString() ?? "";
                    int otype = Convert.ToInt32(row["option_type"]);
                    string ovalue = row["option_value"].ToString() ?? "";
                    long amt = Convert.ToInt64(row["amount"]);
                    bool settled = Convert.ToBoolean(row["is_settled"]);
                    long? payout = row["payout"] as long?;
                    bool claimed = Convert.ToBoolean(row["is_claimed"]);

                    string optStr = otype switch { 1 => $"{t1}胜", 2 => $"{t2}胜", 3 => $"比分 {ovalue}", 4 => $"MVP {ovalue}", _ => ovalue };
                    string statusStr = settled ? (payout > 0 ? (claimed ? $"+{payout} (已领)" : $"+{payout} (可领)") : "未中奖") : "进行中";
                    string matchLabel = $"{t1} vs {t2}";
                    string clickableMatch = matchLabel.CreateCmdInput($"比赛详情 {mid}");
                    sb.AppendLine($"[{bid}] {clickableMatch} | 选项：{optStr} | 投注：{amt} | 状态：{statusStr}");
                }
                return sb.ToString();
            }
            return "数据库连接失败。";
        }

        public static long ClaimRewards(long uid)
        {
            // 返回领取的总金币，由上层加到用户身上
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                sql.Parameters["@uid"] = uid;
                sql.ExecuteDataSet("SELECT id, payout FROM csbetting_bet_records WHERE user_id=@uid AND is_settled=1 AND payout>0 AND is_claimed=0");
                if (!sql.Success || sql.DataSet.Tables[0].Rows.Count == 0) return 0;

                long total = 0;
                foreach (DataRow row in sql.DataSet.Tables[0].Rows)
                {
                    long bid = Convert.ToInt64(row["id"]);
                    long payout = Convert.ToInt64(row["payout"]);
                    total += payout;
                    sql.Parameters["@bid"] = bid;
                    sql.Execute("UPDATE csbetting_bet_records SET is_claimed=1 WHERE id=@bid");
                }
                return total;
            }
            return 0;
        }

        // 创建赛事
        public static bool CreateEvent(string name, DateTime startTime, DateTime endTime, out string error, out long? newEventId)
        {
            error = "";
            newEventId = null;
            using SQLHelper? sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                // 简单校验
                if (string.IsNullOrWhiteSpace(name))
                {
                    error = "赛事名称不能为空。";
                    return false;
                }
                if (endTime <= startTime)
                {
                    error = "结束时间必须晚于开始时间。";
                    return false;
                }

                sql.Parameters["@name"] = name;
                sql.Parameters["@start"] = startTime;
                sql.Parameters["@end"] = endTime;
                sql.Execute("INSERT INTO csbetting_events (name, status, start_time, end_time) VALUES (@name, 0, @start, @end)");

                if (sql.Success)
                {
                    newEventId = sql.LastInsertId;
                    return true;
                }
                error = "赛事创建失败，数据库错误。";
                return false;
            }
            error = "数据库连接失败。";
            return false;
        }

        // 创建比赛
        public static bool CreateMatch(int eventId, string team1Name, string team2Name, string stage, DateTime startTime, DateTime betDeadline, string availableOptions, out string error, out long? newMatchId)
        {
            error = "";
            newMatchId = null;
            using var sql = Factory.OpenFactory.GetSQLHelper();
            if (sql != null)
            {
                // 检查赛事存在
                sql.Parameters["@eid"] = eventId;
                sql.ExecuteDataSet("SELECT id FROM csbetting_events WHERE id = @eid");
                if (!sql.Success || sql.DataSet?.Tables[0].Rows.Count == 0)
                {
                    error = "赛事不存在。";
                    return false;
                }

                // 处理可用选项 JSON
                List<string> options = [.. availableOptions.Split(',', StringSplitOptions.RemoveEmptyEntries)
                                              .Select(s => s.Trim())
                                              .Where(s => s.Length > 0)];
                string optionsJson = System.Text.Json.JsonSerializer.Serialize(options);

                sql.Parameters["@eid"] = eventId;
                sql.Parameters["@t1"] = team1Name;
                sql.Parameters["@t2"] = team2Name;
                sql.Parameters["@stage"] = stage;
                sql.Parameters["@start"] = startTime;
                sql.Parameters["@deadline"] = betDeadline;
                sql.Parameters["@opts"] = optionsJson;
                sql.Execute(@"INSERT INTO csbetting_matches 
          (event_id, team1_name, team2_name, stage, start_time, bet_deadline, available_options, status) 
          VALUES (@eid, @t1, @t2, @stage, @start, @deadline, @opts, 0)");

                if (sql.Success)
                {
                    newMatchId = sql.LastInsertId;
                    return true;
                }
                error = "比赛创建失败，数据库错误。";
                return false;
            }
            error = "数据库连接失败。";
            return false;
        }
    }
}