using System.Collections.Generic;
using System.Linq;
using Game.Player;
using JetBrains.Annotations;
using UnityEngine;

namespace Game.Pathfinding;

public interface IBFSManager
{
    List<WayPoint> FindPath(Vector2 startPos, Vector2 endPos);
    List<WayPoint> FindPath(Vector2 endPos);

    Node<WayPoint> GetNode(Vector2 position);
//    void Test(Vector2 position);
}

public class BFSManager : ManagerBase, IBFSManager
{
    private BFS<WayPoint> bfs;
    private IPlayerManager _playerManager;

    protected override void OnInit()
    {
        base.OnInit();

//        var gameGlobalConfig = GameObject.FindObjectOfType<GameGlobalConfig>();
//        bfs = new BFS<WayPoint>(this.CreateGraph(gameGlobalConfig));
//        var beginNode = GetNode(bfs, new Vector2(-29f, -16.5f));
//        var endNode = GetNode(bfs, new Vector2(-15.8f, 44.3f));
//        var findPath = bfs.FindPath(beginNode, endNode);
//        var wayPoints = new List<WayPoint>();
//        findPath.GetDatas(wayPoints);
//        Debug.Log($"Indices:{string.Join(',', findPath.GetNodes().Select(x => x.index))}");
//        Debug.Log($"Positions:{string.Join(',', findPath.GetNodes().Select(x => x.data.position))}");

        this._playerManager = Game.playerManager;
    }

    protected override void OnUpdate(float dateTime)
    {
        base.OnUpdate(dateTime);
        if (this.bfs == null)
        {
            var gameGlobalConfig = GameObject.FindObjectOfType<GameGlobalConfig>();
            bfs = new BFS<WayPoint>(this.CreateGraph(gameGlobalConfig));
        }
    }

    public List<WayPoint> FindPath(Vector2 startPos, Vector2 endPos)
    {
        var beginNode = GetNode(bfs, startPos);
        var endNode = GetNode(bfs, endPos);
        var findPath = bfs.FindPath(beginNode, endNode);
        var wayPoints = new List<WayPoint>();
        findPath.GetDatas(wayPoints);
        return wayPoints;
    }

    public List<WayPoint> FindPath(Vector2 endPos)
    {
        var player = this._playerManager.currentPlayer;
        var pos = player.self.transform.position;
        var startPos = new Vector2(pos.x, pos.y);
        var beginNode = GetNode(bfs, startPos);
        var endNode = GetNode(bfs, endPos);
//        UnityEngine.Debug.Log($"frome {beginNode.index} to {endNode.index} ");
        var findPath = bfs.FindPath(beginNode, endNode);
        var wayPoints = new List<WayPoint>();
        findPath.GetDatas(wayPoints);
        return wayPoints;
    }

//    public void Test(Vector2 endPos)
//    {
//        var player = this._playerManager.currentPlayer;
//        var pos = player.self.transform.position;
//        var startPos = new Vector2(pos.x, pos.y);
//        var beginNode = GetNode(bfs, startPos);
//        var endNode = GetNode(bfs, endPos);
////        UnityEngine.Debug.Log($"frome {beginNode.index} to {endNode.index} ");
//    }

    [CanBeNull]
    public Node<WayPoint> GetNode(Vector2 position)
    {
        float distance = float.MaxValue;
        Node<WayPoint> targetStartNode = null;
        bfs.GetNode(node =>
        {
            var magnitude = ((Vector2)node.data.position - position).magnitude;
            if (magnitude < distance)
            {
                distance = magnitude;
                targetStartNode = node;
            }

            return false;
        });
        return targetStartNode;
    }

    [CanBeNull]
    private static Node<WayPoint> GetNode(BFS<WayPoint> bfs, Vector2 position)
    {
        float distance = float.MaxValue;
        Node<WayPoint> targetStartNode = null;
        bfs.GetNode(node =>
        {
            var magnitude = ((Vector2)node.data.position - position).magnitude;
            if (magnitude < distance)
            {
                distance = magnitude;
                targetStartNode = node;
            }

            return false;
        });
        return targetStartNode;
    }

    private Graph<WayPoint> CreateGraph(GameGlobalConfig gameGlobalConfig)
    {
        var graph = new WayPointGraph();
        graph.Initialize(gameGlobalConfig.nodeMaps);
        return graph;
    }
}