using Godot;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection.Metadata;
using System.Threading.Tasks;
using System.Xml;

public partial class PegController : TurnController
{
    public int _pegsCreated = 0, _pegsDestroyed = 0;
    public List<PackedScene> _hostilePegScenes;
    public List<Peg> _pegs = new();
    public PlayerController _playerController;
    public Dictionary<string, List<Tween>> _tweenStages = new();
    public Tween _tween;
    public XmlDocument _pegProbabilities = new();

    public override void _Ready()
    {
        base._Ready();
        _hostilePegScenes = [.. Directory.GetFiles("Pegs/HostilePegs/", "*.tscn").Select(f => GD.Load<PackedScene>(f))];

        // _pegProbabilities.Load("res://PegProbabilities.xml");
    }

    public void AddHostilePegs(int PEG_COUNT = 1)
    {
        for (int i = 0; i < PEG_COUNT; i++)
        {
            HostilePeg newHostilePeg = Globals.GetRandomFromList(_hostilePegScenes).Instantiate<HostilePeg>();
            newHostilePeg._id = _pegsCreated;
            newHostilePeg.Death += HandlePegRemoval;
            newHostilePeg.Click += HandlePegClick;

            newHostilePeg._pegController = this;

            List<Vector2I> unoccupied = [.. _playArea._map._bottomRow.Where(c => _pegs.All(e => e._address != c))];
            Vector2I randomCell = unoccupied[Globals._rng.Next(unoccupied.Count)];

            SetPeg(newHostilePeg, randomCell);
            _pegs.Add(newHostilePeg);
            AddChild(newHostilePeg);
            _pegsCreated++;
        }
    }
    public void AddHostilePegs(List<Vector2I> POSITIONS)
    {
        for (int i = 0; i < POSITIONS.Count; i++)
        {
            HostilePeg newHostilePeg = Globals.GetRandomFromList(_hostilePegScenes).Instantiate<HostilePeg>();
            newHostilePeg._id = _pegsCreated;
            newHostilePeg.Death += HandlePegRemoval;
            newHostilePeg.Click += HandlePegClick;

            newHostilePeg._pegController = this;
            
            SetPeg(newHostilePeg, POSITIONS[i]);
            _pegs.Add(newHostilePeg);
            AddChild(newHostilePeg);
            _pegsCreated++;
        }
    }
    
    public void HandlePegTurn()
    {
        _tweenStages.Clear();

        int loop = 0;
        bool noPegsActed = false;
        while (!noPegsActed)
        {
            noPegsActed = true;
            for (int i = 0; i < _pegs.Count; i++)
            {
                Peg peg = _pegs[i];
                bool pegActed = peg.Act(loop);
                if (pegActed && noPegsActed)
                {
                    noPegsActed = false;
                }
            }
            loop++;
        }
    }

    public void HandlePegClick(Node CLICKED_NODE, int CLICK_TYPE)
    {
        if (CLICKED_NODE is not Peg peg)
        {
            return;
        }
        if (CLICK_TYPE == 0)
        {
            if (peg._staminaRemaining <= 0){
                return;
            }
            TileMapLayer pathLayer = _playArea.GetNode<TileMapLayer>("PathLayer");
            List<Vector2I> newPath = peg.GetBestPath();

            pathLayer.GetUsedCells().ToList().ForEach(c => pathLayer.SetCell(c,0,Vector2I.Down*4));
            for (int i = 0; i < newPath.Count; i++)
            {
                pathLayer.SetCell(newPath[i],0,Vector2I.One);
            }
        }
        else if (CLICK_TYPE == 2)
        {
            HandlePegRemoval(peg);
        }
    }

    public void HandlePegRemoval(Peg PEG_TO_REMOVE)
    {
        _pegs.Remove(PEG_TO_REMOVE);
        _playArea._map.SetCellPeg(PEG_TO_REMOVE._address, null);
        PEG_TO_REMOVE.QueueFree();
        _pegsDestroyed++;
    }

    public void HandlePegSort()
    {
        _pegs = [.. _pegs.OrderBy(p => p._address.Y).ThenBy(p => p._distanceToGoal).ThenBy(p => Math.Abs(p._address.X - _playArea._map._maxX / 2))];
    }


    public void Initiate()
    {
        List<Vector2I> positions = [.. _playArea.GetNode<TileMapLayer>("InitialPositions").GetUsedCells()];

        AddHostilePegs(positions);
    }

    public void ProcessTween()
    {
        _tweenStages = _tweenStages.OrderBy(s => s.Key.Split(":")[0]).ThenBy(s => s.Key.Split(":")[1]).ToDictionary();
        if (_tweenStages.Count <= 0)
        {
            EndTurn();
            return;
        }

        if (_tween != null)
        {
            _tween.Kill();
        }

        _tween = CreateTween();

        for (int i = 0; i < _tweenStages.Count; i++)
        {
            _tween.Chain().TweenInterval(0.5f);
            List<Tween> tweenSteps = _tweenStages.Values.ElementAt(i);
            for (int j = 0; j < tweenSteps.Count; j++)
            {
                Tween step = tweenSteps[j];
                _tween.Parallel().TweenSubtween(step);
            }
        }
        _tween.TweenCallback(Callable.From(EndTurn));

    }

    public override void StartTurn()
    {

        AddHostilePegs(4);

        for (int i = 0; i < _pegs.Count; i++)
        {
            _pegs[i].StartTurn();
        }

        HandlePegSort();

        HandlePegTurn();

        ProcessTween();
    }

    public void SetPeg(Peg PEG, Vector2I CELL)
    {
        _playArea._map.SetCellPeg(CELL, PEG);
        PEG.GlobalPosition = _playArea._map.GetCellPositionFromAddress(CELL);
    }

}