using System.Text.RegularExpressions;
using RainOpsMini.Models;
using System.Text.Json;
using System.Text.Json.Serialization;
using RainOpsMini.Helpers.RCON;

namespace RainOpsMini
{
    public static class RconParser
    {
        // Team ID: 1 (1st Infantry Division)
        private static readonly Regex TeamHeaderRegex = new Regex(@"Team ID:\s*(\d+)\s*\(", RegexOptions.Compiled);

        // ID: 1 | Name: Squad 1 | Size: 5 | Locked: False | Creator Name: lanyu | Creator Online IDs: EOS: 00020148e4944a0a9ca3ddd4c703b5e0 steam: 76561198296558085
        private static readonly Regex SquadRegex = new Regex(@"ID:\s*(\d+)\s*\|\s*Name:\s*(.+?)\s*\|\s*Size:\s*(\d+)\s*\|\s*Locked:\s*(\w+)\s*\|\s*Creator Name:\s*(.+?)\s*\|\s*Creator Online IDs:\s*EOS:\s*(\w+)\s*steam:\s*(\d+)", RegexOptions.Compiled);

        // ID: 40 | Online IDs: EOS: 00026c77c7fc494fa0ab3a337382826f steam: 76561199065911668 | Name:  ANDRUHA | Team ID: 1 | Squad ID: N/A | Is Leader: False | Role: USA_Rifleman_01
        private static readonly Regex PlayerRegex = new Regex(@"ID:\s*(\d+)\s*\|\s*Online IDs:\s*EOS:\s*(\w+)\s*steam:\s*(\d+)\s*\|\s*Name:\s*(.+?)\s*\|\s*Team ID:\s*(\d+)\s*\|\s*Squad ID:\s*(.+?)\s*\|\s*Is Leader:\s*(\w+)\s*\|\s*Role:\s*(.+)", RegexOptions.Compiled);

        // [ChatAll] [Online IDs:EOS: 0002236691c54d00b82bcf1b04a27761 steam: 76561199735605536] [hina] 澶ф : cj
        // [ChatAll] [Online IDs:EOS: 00026937662e43e593caf18bebdbeb2a steam: 76561199402993315]   Rain鍦ㄤ笅鐝?: 00
        // Improved Regex to handle both [Name] Message and Name : Message formats
        private static readonly Regex ChatRegex = new Regex(@"\[(ChatAll|ChatTeam|ChatSquad|ChatAdmin|ChatGame)\]\s*\[Online IDs:?\s*EOS:\s*(\w+)\s*steam:\s*(\d+)\]\s*(?:\[(.+?)\]\s*(.*)|(.+?)\s*:\s*(.*))", RegexOptions.Compiled);

        public static ChatMessage? ParseChatMessage(string rconOutput)
        {
            if (string.IsNullOrWhiteSpace(rconOutput)) return null;

            var match = ChatRegex.Match(rconOutput);
            if (match.Success)
            {
                // Group 4/5 are for [Name] Message format
                // Group 6/7 are for Name : Message format
                string name = match.Groups[4].Success ? match.Groups[4].Value : match.Groups[6].Value;
                string message = match.Groups[4].Success ? match.Groups[5].Value : match.Groups[7].Value;

                return new ChatMessage
                {
                    Type = match.Groups[1].Value,
                    EosId = match.Groups[2].Value,
                    SteamId = match.Groups[3].Value,
                    Name = name?.Trim() ?? "Unknown",
                    Message = message?.Trim() ?? "",
                    Timestamp = DateTime.Now
                };
            }
            return null;
        }

        public static ServerInfoResponse? ParseServerInfo(string rconOutput)
        {
            if (string.IsNullOrWhiteSpace(rconOutput)) return null;

            // ShowServerInfo might return raw JSON string, sometimes wrapped in quotes or with other text
            // We'll try to find the JSON object part: starts with { and ends with }
            int startIndex = rconOutput.IndexOf('{');
            int endIndex = rconOutput.LastIndexOf('}');

            if (startIndex >= 0 && endIndex > startIndex)
            {
                string json = rconOutput.Substring(startIndex, endIndex - startIndex + 1);
                try
                {
                    var options = new JsonSerializerOptions
                    {
                        PropertyNameCaseInsensitive = true,
                        NumberHandling = JsonNumberHandling.AllowReadingFromString
                    };
                    var info = JsonSerializer.Deserialize<ServerInfoResponse>(json, options);
                    
                    // Fallback for PlayTime_I if not in JSON (it is usually there, but just in case)
                    // Actually standard ShowServerInfo returns JSON with PLAYTIME_I field.
                    
                    return info;
                }
                catch (Exception ex)
                {
                    RainOpsMini.Helpers.RainOpsLog.Log($"[Error] Failed to parse ServerInfo JSON: {ex.Message}");
                    // Optional: Print json snippet for debugging
                    // RainOpsMini.Helpers.RainOpsLog.Log($"[Debug] JSON: {json}");
                    return null;
                }
            }
            return null;
        }

        public static List<SquadInfo> ParseSquads(string rconOutput)
        {
            var squads = new List<SquadInfo>();
            if (string.IsNullOrWhiteSpace(rconOutput)) return squads;

            var lines = rconOutput.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
            int currentTeamId = 0;

            foreach (var line in lines)
            {
                var teamMatch = TeamHeaderRegex.Match(line);
                if (teamMatch.Success)
                {
                    if (int.TryParse(teamMatch.Groups[1].Value, out int tid))
                    {
                        currentTeamId = tid;
                    }
                    continue;
                }

                var squadMatch = SquadRegex.Match(line);
                if (squadMatch.Success)
                {
                    var squad = new SquadInfo
                    {
                        TeamId = currentTeamId,
                        Id = int.Parse(squadMatch.Groups[1].Value),
                        Name = squadMatch.Groups[2].Value.Trim(),
                        Size = int.Parse(squadMatch.Groups[3].Value),
                        Locked = bool.Parse(squadMatch.Groups[4].Value),
                        CreatorName = squadMatch.Groups[5].Value.Trim(),
                        CreatorEosId = squadMatch.Groups[6].Value,
                        CreatorSteamId = squadMatch.Groups[7].Value
                    };
                    squads.Add(squad);
                }
            }
            return squads;
        }

        public static List<PlayerInfo> ParsePlayers(string rconOutput)
        {
            var players = new List<PlayerInfo>();
            if (string.IsNullOrWhiteSpace(rconOutput)) return players;

            var lines = rconOutput.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);

            foreach (var line in lines)
            {
                var match = PlayerRegex.Match(line);
                if (match.Success)
                {
                    var player = new PlayerInfo
                    {
                        Id = int.Parse(match.Groups[1].Value),
                        EosId = match.Groups[2].Value,
                        SteamId = match.Groups[3].Value,
                        Name = match.Groups[4].Value.Trim(),
                        TeamId = int.Parse(match.Groups[5].Value),
                        IsLeader = bool.Parse(match.Groups[7].Value),
                        Role = match.Groups[8].Value.Trim()
                    };

                    string squadIdStr = match.Groups[6].Value.Trim();
                    if (squadIdStr != "N/A" && int.TryParse(squadIdStr, out int sid))
                    {
                        player.SquadId = sid;
                    }

                    players.Add(player);
                }
            }
            return players;
        }
    }
}