using CounterStrikeSharp.API;
using CounterStrikeSharp.API.Core;
using CounterStrikeSharp.API.Modules.Utils;
using Cs2SuperPowers.Players;
using Cs2SuperPowers.Players.PlayerValidations;

namespace Cs2SuperPowers.Powers.Assign;

public class RandomAssignLogic : IPowerAssignLogic
{
    // Configuration for special rounds
    private const double SpecialRoundChance = 0.25;
    
    // Powers that can be assigned during special rounds (everyone gets the same power)
    private readonly string[] SpecialRoundPowers = 
    {
        "Go Fast", "Grenade Launcher", "Air Strike", "Not So Decoy", "I Am Chicken!"
    };

    private readonly List<Delegate> _registeredHandlers = new();

    public void Initialize(BasePlugin pluginRef, IReadOnlyCollection<ISuperPower> powers)
    {
        BasePlugin.GameEventHandler<EventPlayerDisconnect> disconnectHandler = (@event, _) =>
        {
            var player = @event.Userid;

            if (!Ensure.Player(player).IsValid().Check()) return HookResult.Continue;
            PlayerPowers.Instance.RemovePower(player!);

            return HookResult.Continue;
        };
        _registeredHandlers.Add(disconnectHandler);
        pluginRef.RegisterEventHandler(disconnectHandler);


        BasePlugin.GameEventHandler<EventRoundStart> roundStartHandler = (_, _) =>
        {
            var gameRules = Utilities
                .FindAllEntitiesByDesignerName<CBaseEntity>("cs_gamerules")
                .Single()
                .As<CCSGameRulesProxy>()
                .GameRules!;
            
            if (gameRules.WarmupPeriod)
            {
                return HookResult.Continue;
            }

            var activePlayerCount = Utilities.GetPlayers().Count(player =>
                player.IsValid && player.Team != CsTeam.None && player.Team != CsTeam.Spectator);
            var randomAssignablePowers = powers
                .Where(p => p.CanBeRandomlyAssigned && p.MinimumPlayersRequired <= activePlayerCount)
                .ToArray();
            if (randomAssignablePowers.Length == 0)
            {
                return HookResult.Continue;
            }
            
            var random = new Random();
            var isSpecialRound = random.NextDouble() < SpecialRoundChance;
            
            if (isSpecialRound)
            {
                // Special round: everyone gets the same power
                var specialRoundCandidates = randomAssignablePowers
                    .Where(p => SpecialRoundPowers.Contains(p.Name))
                    .ToArray();
                var specialPower = specialRoundCandidates.Length == 0
                    ? null
                    : specialRoundCandidates[random.Next(specialRoundCandidates.Length)];
                
                if (specialPower != null)
                {
                    // Assign the same power to all players (without individual messages)
                    foreach (var player in Utilities.GetPlayers())
                    {
                        if (player.Team == CsTeam.Spectator || player.Team == CsTeam.None) continue;
                        PlayerPowers.Instance.AddPower(player!, specialPower, showMessages: false);
                    }
                    
                    // Announce special round to all players
                    Server.PrintToChatAll($"{ChatColors.Gold}SPECIAL ROUND!{ChatColors.Default}");
                    Server.PrintToChatAll($"{ChatColors.Yellow}Everyone has the same power: {ChatColors.Default}{specialPower.ChatColor}{specialPower.Name}{ChatColors.Default}");
                }
                else
                {
                    // Fallback to normal assignment if special power not found
                    foreach (var player in Utilities.GetPlayers())
                    {
                        if (player.Team == CsTeam.Spectator || player.Team == CsTeam.None) continue;
                        var randomPower = randomAssignablePowers.OrderBy(_ => random.Next()).First();
                        PlayerPowers.Instance.AddPower(player!, randomPower, showMessages: true);
                    }
                }
            }
            else
            {
                // Normal round: random powers for each player
                foreach (var player in Utilities.GetPlayers())
                {
                    if (player.Team == CsTeam.Spectator || player.Team == CsTeam.None) continue;
                    var randomPower = randomAssignablePowers.OrderBy(_ => random.Next()).First();
                    PlayerPowers.Instance.AddPower(player!, randomPower, showMessages: true);
                }
                
                // Show individual powers to each team
                foreach (var player in Utilities.GetPlayers())
                {
                    var team = player.Team;                

                    player.PrintToChat($"Your {ChatColors.Blue}Team {ChatColors.Default}powers are:");
                    PlayerPowers.Instance
                        .GetAssignedPowers()
                        .Where(x => x.Player.Team == team)
                        .Select(x => {
                            player.PrintToChat($"{ChatColors.DarkRed} ► {x.Player.PlayerName} {ChatColors.Default}: {x.Power.ChatColor}{x.Power.Name}");                        
                            return x;
                        })
                        .ToList();
                }
            }

            return HookResult.Continue;
        };
        _registeredHandlers.Add(roundStartHandler);
        pluginRef.RegisterEventHandler(roundStartHandler, HookMode.Pre);

        BasePlugin.GameEventHandler<EventPlayerDeath> deathHandler = (@event, _) =>
        {
            var victim = @event.Userid;
            var attacker = @event.Attacker;

            if (victim == null || attacker == null || victim == attacker) return HookResult.Continue;

            if (!PlayerPowers.Instance.TryGetValue(attacker, out var attackerPower))
            {
                return HookResult.Continue;
            }

            victim.PrintToChat($"You have been killed by {ChatColors.DarkRed}{attacker.PlayerName}{ChatColors.Lime}");
            victim.PrintToChat($"His/her super power was: {attackerPower!.ChatColor}{attackerPower.Name}");

            return HookResult.Continue;
        };
        _registeredHandlers.Add(deathHandler);
        pluginRef.RegisterEventHandler(deathHandler);
    }
}