using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using TownOfUsStatsExporter.Models;
using UnityEngine;

namespace TownOfUsStatsExporter.Export;

/// <summary>
/// Transforms reflected TOU Mira data into export format.
/// </summary>
public static class DataTransformer
{
    private static readonly Dictionary<byte, string> MapNames = new()
    {
        { 0, "The Skeld" },
        { 1, "MIRA HQ" },
        { 2, "Polus" },
        { 3, "Airship" },
        { 4, "The Fungle" },
        { 5, "Submerged" },
    };

    /// <summary>
    /// Transforms TOU Mira data to export format.
    /// </summary>
    /// <param name="playerRecords">Player records from TOU Mira.</param>
    /// <param name="playerStats">Player statistics from TOU Mira.</param>
    /// <param name="roleHistory">Role history from TOU Mira.</param>
    /// <param name="killedPlayers">Killed players list from TOU Mira.</param>
    /// <param name="winningFaction">Winning faction name.</param>
    /// <param name="apiToken">API authentication token.</param>
    /// <param name="secret">Optional secret for authentication.</param>
    /// <returns>Game statistics data ready for export.</returns>
    public static GameStatsData TransformToExportFormat(
        List<PlayerRecordData> playerRecords,
        Dictionary<byte, PlayerStatsData> playerStats,
        Dictionary<byte, List<string>> roleHistory,
        List<KilledPlayerData> killedPlayers,
        string winningFaction,
        string apiToken,
        string? secret)
    {
        var gameData = new GameStatsData
        {
            Token = apiToken,
            Secret = secret,
            GameInfo = BuildGameInfo(),
            GameResult = new GameResultData
            {
                WinningTeam = DetermineWinningTeam(winningFaction, playerRecords),
            },
        };

        // Transform each player
        foreach (var record in playerRecords)
        {
            try
            {
                var playerData = TransformPlayerData(record, playerStats, roleHistory, killedPlayers);
                gameData.Players.Add(playerData);
            }
            catch (Exception ex)
            {
                TownOfUsStatsPlugin.Logger.LogError($"Error transforming player {record.PlayerName}: {ex}");
            }
        }

        return gameData;
    }

    private static GameInfoData BuildGameInfo()
    {
        return new GameInfoData
        {
            GameId = Guid.NewGuid().ToString(),
            Timestamp = DateTime.UtcNow,
            LobbyCode = InnerNet.GameCode.IntToGameName(AmongUsClient.Instance.GameId),
            GameMode = GameOptionsManager.Instance?.CurrentGameOptions?.GameMode.ToString() ?? "Unknown",
            Duration = Time.time,
            Map = GetMapName((byte)(GameOptionsManager.Instance?.CurrentGameOptions?.MapId ?? 0)),
        };
    }

    private static PlayerExportData TransformPlayerData(
        PlayerRecordData record,
        Dictionary<byte, PlayerStatsData> playerStats,
        Dictionary<byte, List<string>> roleHistory,
        List<KilledPlayerData> killedPlayers)
    {
        var player = PlayerControl.AllPlayerControls.ToArray()
            .FirstOrDefault(p => p.PlayerId == record.PlayerId);

        TownOfUsStatsPlugin.Logger.LogInfo($"Transforming player {record.PlayerId} ({record.PlayerName})");
        TownOfUsStatsPlugin.Logger.LogInfo($"  RoleString: '{record.RoleString}'");

        // STEP 1: Extract modifiers from player name BEFORE cleaning it
        // Symbols like ♥ indicate Lovers modifier
        var nameModifiers = ExtractModifiersFromPlayerName(record.PlayerName);

        // Get role history for this player
        var roles = roleHistory.GetValueOrDefault(record.PlayerId, new List<string>());
        TownOfUsStatsPlugin.Logger.LogInfo($"  RoleHistory entries: {roles.Count}");

        // If roleHistory is empty, try parsing from RoleString as fallback
        if (roles.Count == 0 && !string.IsNullOrEmpty(record.RoleString))
        {
            TownOfUsStatsPlugin.Logger.LogInfo($"  Parsing roles from RoleString...");
            roles = ParseRolesFromRoleString(record.RoleString);
            TownOfUsStatsPlugin.Logger.LogInfo($"  Parsed {roles.Count} role(s): {string.Join(", ", roles)}");
        }

        var lastRole = roles.LastOrDefault() ?? "Unknown";
        TownOfUsStatsPlugin.Logger.LogInfo($"  Final role: {lastRole}");

        // Get stats
        var stats = playerStats.GetValueOrDefault(record.PlayerId, new PlayerStatsData());

        // Count kills
        var kills = killedPlayers.Count(k => k.KillerId == record.PlayerId && k.VictimId != record.PlayerId);

        // STEP 2: Get modifiers from multiple sources
        var bridge = ReflectionBridgeProvider.GetBridge();
        var modifiers = bridge.GetPlayerModifiers(record.PlayerId);
        TownOfUsStatsPlugin.Logger.LogInfo($"  Reflection modifiers: {modifiers.Count}");

        // Add modifiers from player name symbols
        if (nameModifiers.Count > 0)
        {
            TownOfUsStatsPlugin.Logger.LogInfo($"  Name symbol modifiers: {nameModifiers.Count} ({string.Join(", ", nameModifiers)})");
            foreach (var mod in nameModifiers)
            {
                if (!modifiers.Contains(mod))
                {
                    modifiers.Add(mod);
                }
            }
        }

        // If still no modifiers, try parsing from RoleString
        if (modifiers.Count == 0 && !string.IsNullOrEmpty(record.RoleString))
        {
            TownOfUsStatsPlugin.Logger.LogInfo($"  Parsing modifiers from RoleString...");
            var roleStringMods = ParseModifiersFromRoleString(record.RoleString);
            TownOfUsStatsPlugin.Logger.LogInfo($"  Parsed {roleStringMods.Count} modifier(s): {string.Join(", ", roleStringMods)}");
            modifiers.AddRange(roleStringMods);
        }

        TownOfUsStatsPlugin.Logger.LogInfo($"  Total modifiers: {modifiers.Count} ({string.Join(", ", modifiers)})");

        // Get task info
        int totalTasks = 0;
        int completedTasks = 0;
        if (player != null && player.Data?.Tasks != null)
        {
            totalTasks = player.Data.Tasks.ToArray().Length;
            completedTasks = player.Data.Tasks.ToArray().Count(t => t.Complete);
        }

        // Fix assassin kills: negative values mean incorrect guesses
        // TOU Mira uses CorrectAssassinKills-- when player misguesses, resulting in -1
        int correctAssassinKills = stats.CorrectAssassinKills;
        int incorrectAssassinKills = stats.IncorrectAssassinKills;
        
        if (correctAssassinKills < 0)
        {
            // Negative correct kills means they misguessed
            incorrectAssassinKills += Math.Abs(correctAssassinKills);
            correctAssassinKills = 0;
        }

        return new PlayerExportData
        {
            PlayerId = record.PlayerId,
            PlayerName = StripColorTags(record.PlayerName),
            PlayerTag = GetPlayerTag(player),
            Platform = GetPlayerPlatform(player),
            Role = lastRole,
            Roles = roles,
            Modifiers = modifiers,
            IsWinner = record.Winner,
            Stats = new PlayerStatsNumbers
            {
                TotalTasks = totalTasks,
                TasksCompleted = completedTasks,
                Kills = kills,
                CorrectKills = stats.CorrectKills,
                IncorrectKills = stats.IncorrectKills,
                CorrectAssassinKills = correctAssassinKills,
                IncorrectAssassinKills = incorrectAssassinKills,
            },
        };
    }

    private static string DetermineWinningTeam(string winningFaction, List<PlayerRecordData> playerRecords)
    {
        // Use WinningFaction from GameHistory if available
        if (!string.IsNullOrEmpty(winningFaction))
        {
            // Clean HTML tags from winning faction
            return StripColorTags(winningFaction);
        }

        // Fallback: Check first winner's team
        var winner = playerRecords.FirstOrDefault(r => r.Winner);
        if (winner == null)
        {
            return "Unknown";
        }

        return winner.TeamString switch
        {
            "Crewmate" => "Crewmates",
            "Impostor" => "Impostors",
            "Neutral" => "Neutrals",
            "Custom" => "Custom",
            _ => "Unknown",
        };
    }

    private static string GetMapName(byte mapId)
    {
        return MapNames.TryGetValue(mapId, out var name) ? name : $"Unknown Map ({mapId})";
    }

    /// <summary>
    /// Extracts modifier information from special symbols in player names.
    /// Symbols like ♥ (Lovers) appear inside HTML tags like: <b><size=60%>♥</size></b>
    /// </summary>
    /// <param name="playerName">Raw player name with HTML tags</param>
    /// <returns>List of modifier names found in the name</returns>
    private static List<string> ExtractModifiersFromPlayerName(string playerName)
    {
        var modifiers = new List<string>();

        if (string.IsNullOrEmpty(playerName))
        {
            return modifiers;
        }

        // Map of symbols to modifier names
        // Note: \u2665 IS the same as ♥, so we only include one
        var symbolToModifier = new Dictionary<string, string>
        {
            { "♥", "Lovers" },     // \u2665 in Unicode
            { "❤", "Lovers" },     // \u2764
            { "♡", "Lovers" },     // \u2661
            { "#", "Underdog" },
            { "★", "VIP" },        // \u2605
            { "☆", "VIP" },        // \u2606
            { "@", "Sleuth" },
            { "†", "Bait" },       // \u2020
            { "‡", "Bait" },       // \u2021
            { "§", "Torch" },
            { "⚡", "Flash" },
            { "⚔", "Assassin" },
            { "🗡", "Assassin" },
        };

        // Extract content from size tags: <size=60%>SYMBOL</size>
        // This is where modifier symbols are located
        var sizeTagPattern = @"<size=[^>]*>([^<]+)</size>";
        var matches = Regex.Matches(playerName, sizeTagPattern);

        foreach (Match match in matches)
        {
            if (match.Groups.Count > 1)
            {
                var symbolText = match.Groups[1].Value;
                TownOfUsStatsPlugin.Logger.LogInfo($"  Found symbol in size tag: '{symbolText}'");

                // Check if this symbol matches any known modifier
                foreach (var kvp in symbolToModifier)
                {
                    if (symbolText.Contains(kvp.Key))
                    {
                        if (!modifiers.Contains(kvp.Value))
                        {
                            modifiers.Add(kvp.Value);
                            TownOfUsStatsPlugin.Logger.LogInfo($"  Matched modifier '{kvp.Value}' from symbol '{kvp.Key}'");
                        }
                    }
                }
            }
        }

        return modifiers;
    }

    /// <summary>
    /// Strips all HTML/Unity tags AND modifier symbols from text to get clean player name.
    /// Should be called AFTER extracting modifiers from symbols.
    /// </summary>
    private static string StripColorTags(string text)
    {
        if (string.IsNullOrEmpty(text))
        {
            return text;
        }

        // Step 1: Remove all Unity/HTML tags
        // Pattern matches: <tag>, <tag=value>, <tag=#value>, </tag>
        text = Regex.Replace(text, @"<[^>]+>", string.Empty);

        // Step 2: Remove all modifier symbols that were extracted
        // These symbols should not appear in the final clean name
        var symbolsToRemove = new[] { "♥", "❤", "♡", "#", "★", "☆", "@", "†", "‡", "§", "⚡", "⚔", "🗡" };
        foreach (var symbol in symbolsToRemove)
        {
            text = text.Replace(symbol, string.Empty);
        }

        return text.Trim();
    }

    private static string? GetPlayerTag(PlayerControl? player)
    {
        if (player?.Data?.FriendCode != null && !string.IsNullOrEmpty(player.Data.FriendCode))
        {
            return player.Data.FriendCode;
        }

        return null;
    }

    private static string GetPlayerPlatform(PlayerControl? player)
    {
        // TOU Mira is Mira-based, so always return "Mira"
        return "Mira";
    }

    /// <summary>
    /// Parses roles from RoleString format with color tags and separators.
    /// </summary>
    private static List<string> ParseRolesFromRoleString(string roleString)
    {
        var roles = new List<string>();
        
        if (string.IsNullOrEmpty(roleString))
        {
            return roles;
        }

        // RoleString format: "RoleName (Modifier) (0/4) | Status | Other Info"
        // We only want the role names before " > " separator
        
        // First, split by " > " to get role history
        var roleParts = roleString.Split(new[] { " > " }, StringSplitOptions.RemoveEmptyEntries);
        
        foreach (var part in roleParts)
        {
            // Strip color tags first
            var cleanPart = StripColorTags(part).Trim();
            
            // Extract just the role name before any modifiers or additional info
            // Format: "RoleName (Modifier) (Tasks) | Other..."
            
            // Remove everything after " | " (status info like "Alive", "Killed By", etc.)
            var pipeIndex = cleanPart.IndexOf(" |");
            if (pipeIndex > 0)
            {
                cleanPart = cleanPart.Substring(0, pipeIndex).Trim();
            }
            
            // Remove task info like "(0/4)" at the end
            cleanPart = Regex.Replace(cleanPart, @"\s*\(\d+/\d+\)\s*$", "").Trim();
            
            // Remove modifier info in parentheses like "(Flash)", "(Button Barry)"
            // Keep only the first part before parentheses
            var parenIndex = cleanPart.IndexOf('(');
            if (parenIndex > 0)
            {
                cleanPart = cleanPart.Substring(0, parenIndex).Trim();
            }
            
            if (!string.IsNullOrEmpty(cleanPart))
            {
                roles.Add(cleanPart);
            }
        }
        
        return roles;
    }

    /// <summary>
    /// Parses modifiers from RoleString format.
    /// Modifiers appear in parentheses after the role name.
    /// Example: "Undertaker (Button Barry)" -> ["Button Barry"]
    /// </summary>
    private static List<string> ParseModifiersFromRoleString(string roleString)
    {
        var modifiers = new List<string>();
        
        if (string.IsNullOrEmpty(roleString))
        {
            return modifiers;
        }

        // Strip color tags first
        var cleanString = StripColorTags(roleString);
        
        // Remove everything after " | " (status info)
        var pipeIndex = cleanString.IndexOf(" |");
        if (pipeIndex > 0)
        {
            cleanString = cleanString.Substring(0, pipeIndex).Trim();
        }
        
        // Remove task info like "(0/4)" at the end
        cleanString = Regex.Replace(cleanString, @"\s*\(\d+/\d+\)\s*$", "").Trim();
        
        // Now extract modifiers from parentheses
        // Pattern: RoleName (Modifier1, Modifier2) or RoleName (Modifier)
        var modifierPattern = @"\(([^)]+)\)";
        var matches = Regex.Matches(cleanString, modifierPattern);
        
        foreach (Match match in matches)
        {
            if (match.Groups.Count > 1)
            {
                var modifierText = match.Groups[1].Value.Trim();
                
                // Split by comma if there are multiple modifiers
                var modifierNames = modifierText.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
                
                foreach (var modName in modifierNames)
                {
                    var cleanModifier = modName.Trim();
                    if (!string.IsNullOrEmpty(cleanModifier))
                    {
                        modifiers.Add(cleanModifier);
                    }
                }
            }
        }
        
        return modifiers;
    }
}