using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace BuildSystem
{
    public class CarData{
        public List<Transform> transforms;
        public int id;
        public Dir dir;

        public CarData(List<Transform> transforms, int id, Dir dir) {
            this.transforms = transforms;
            this.id = id;
            this.dir = dir;
            if (dir == Dir.up) {
                this.dir = Dir.down;
            }
            else if(dir == Dir.down) {
                this.dir = Dir.up;
            }
            else if (dir == Dir.left)
            {
                this.dir = Dir.right;
            }
            else if (dir == Dir.right)
            {
                this.dir = Dir.left;
            }
        }
    }
    public class RoadInfo : MonoBehaviour
    {
        public List<Transform> enterUp1;
        public List<Transform> enterUp2;
        public List<Transform> enterUp3;

        public List<Transform> enterDown1;
        public List<Transform> enterDown2;
        public List<Transform> enterDown3;

        public List<Transform> enterLeft1;
        public List<Transform> enterLeft2;
        public List<Transform> enterLeft3;

        public List<Transform> enterRight1;
        public List<Transform> enterRight2;
        public List<Transform> enterRight3;

        [Header("出")]
        public List<Transform> outUp1;
        public List<Transform> outUp2;
        public List<Transform> outUp3;
                               
        public List<Transform> outDown1;
        public List<Transform> outDown2;
        public List<Transform> outDown3;
                               
        public List<Transform> outLeft1;
        public List<Transform> outLeft2;
        public List<Transform> outLeft3;
                               
        public List<Transform> outRight1;
        public List<Transform> outRight2;
        public List<Transform> outRight3;

        [Header("中转点")]
        public Transform upPos;
        public Transform downPos;
        public Transform leftPos;
        public Transform rightPos;


        /// <summary>
        /// 根据给出的路径获取进入方向，出去方向和车道
        /// </summary>
        /// <param name="nowGrid">当前位于的格子</param>
        /// <param name="nextGrid">下一个格子</param>
        /// <param name="nextnextGrid">下下个格子</param>
        /// <returns></returns>
        public List<Transform> GetRoad(Grid nowGrid, Grid nextGrid, Grid nextnextGrid,ref int enterID,ref int outID)
        {
            Dir enterDir = GetDir(new Vector2Int(nowGrid.x, nowGrid.z), new Vector2Int(nextGrid.x, nextGrid.z));
            Dir outDir = GetDir(new Vector2Int(nextGrid.x, nextGrid.z), new Vector2Int(nextnextGrid.x, nextnextGrid.z));
            int[] rayRoad = new int[2] { enterID , outID };
            List<Transform> road = new List<Transform>();
            //根据进入方向给出移动点位
            if (enterDir == Dir.up) {
                if (rayRoad[0] == 0) {
                    foreach (Transform i in enterUp1)
                    {
                        road.Add(i);
                    }
                } else if (rayRoad[0] == 1) {
                    foreach (Transform i in enterUp2)
                    {
                        road.Add(i);
                    }
                }
                else if (rayRoad[0] == 2)
                {
                    foreach (Transform i in enterUp3)
                    {
                        road.Add(i);
                    }
                }
                if (upPos) {
                    road.Add(upPos);
                }
                
            }else if (enterDir == Dir.down)
            {
                if (rayRoad[0] == 0)
                {
                    foreach (Transform i in enterDown1)
                    {                            
                        road.Add(i);             
                    }                            
                }                                
                else if (rayRoad[0] == 1)        
                {                                
                    foreach (Transform i in enterDown2)
                    {                            
                        road.Add(i);             
                    }                            
                }                                
                else if (rayRoad[0] == 2)        
                {                                
                    foreach (Transform i in enterDown3)
                    {
                        road.Add(i);
                    }
                }
                if (downPos)
                {
                    road.Add(downPos);
                }
                
            }
            else if (enterDir == Dir.left)
            {
                if (rayRoad[0] == 0)
                {
                    foreach (Transform i in enterLeft1)
                    {                            
                        road.Add(i);             
                    }                            
                }                                
                else if (rayRoad[0] == 1)        
                {                                
                    foreach (Transform i in enterLeft2)
                    {                            
                        road.Add(i);             
                    }                            
                }                                
                else if (rayRoad[0] == 2)        
                {                                
                    foreach (Transform i in enterLeft3)
                    {
                        road.Add(i);
                    }
                }
                if (leftPos)
                {
                    road.Add(leftPos);
                }
            }
            else if (enterDir == Dir.right)
            {
                if (rayRoad[0] == 0)
                {
                    foreach (Transform i in enterRight1)
                    {                            
                        road.Add(i);             
                    }                            
                }                                
                else if (rayRoad[0] == 1)        
                {                                
                    foreach (Transform i in enterRight2)
                    {                            
                        road.Add(i);             
                    }                            
                }                                
                else if (rayRoad[0] == 2)        
                {                                
                    foreach (Transform i in enterRight3)
                    {
                        road.Add(i);
                    }
                }
                if (rightPos)
                {
                    road.Add(rightPos);
                }
            }


            //根据出去方向给出移动点位
            if (outDir == Dir.up)
            {
                if (rayRoad[1] == 0)
                {
                    foreach (Transform i in outUp1)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 1)   
                {                           
                    foreach (Transform i in outUp2)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 2)   
                {                           
                    foreach (Transform i in outUp3)
                    {
                        road.Add(i);
                    }
                }
            }
            else if (outDir == Dir.down)
            {
                if (rayRoad[1] == 0)
                {
                    foreach (Transform i in outDown1)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 1)   
                {                           
                    foreach (Transform i in outDown2)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 2)   
                {                           
                    foreach (Transform i in outDown3)
                    {                       
                        road.Add(i);        
                    }                       
                }                                      
            }                               
            else if (outDir == Dir.left)    
            {                               
                if (rayRoad[1] == 0)        
                {                           
                    foreach (Transform i in outLeft1)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 1)   
                {                           
                    foreach (Transform i in outLeft2)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 2)   
                {                           
                    foreach (Transform i in outLeft3)
                    {                       
                        road.Add(i);        
                    }                       
                }                                      
            }                               
            else if (outDir == Dir.right)   
            {                               
                if (rayRoad[1] == 0)        
                {                           
                    foreach (Transform i in outRight1)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 1)   
                {                           
                    foreach (Transform i in outRight2)
                    {                       
                        road.Add(i);        
                    }                       
                }                           
                else if (rayRoad[1] == 2)   
                {                           
                    foreach (Transform i in outRight3)
                    {
                        road.Add(i);
                    }
                }
            }
            enterID = -1;
            outID = -1;
            return road;
        }


        /// <summary>
        /// 获取移动方向
        /// </summary>
        /// <param name="a">初始坐标</param>
        /// <param name="b">下一个目标点的坐标</param>
        /// <returns></returns>
        public Dir GetDir(Vector2Int a, Vector2Int b)
        {
            if (a.x - b.x != 0)
            {
                return a.x - b.x > 0 ? Dir.left : Dir.right;
            }
            if (a.y - b.y != 0)
            {
                return a.y - b.y > 0 ? Dir.down : Dir.up;
            }
            return Dir.none;
        }

        /// <summary>
        /// 根据进出方向获取车道
        /// </summary>
        /// <param name="grid"></param>
        /// <param name="enterDir"></param>
        /// <param name="outDir"></param>
        /// <returns>第一个参数为进入的车道，第二个为出的车道</returns>
        public int[] GetRayRoad(Grid grid, Dir enterDir, Dir outDir) {
            int[] rayRoad = new int[2];
            //随机进入车道车道
            if (enterDir == Dir.up) 
            {
                if (grid.type[2] == RoadNumberType.Two) 
                {
                    rayRoad[0] = Random.Range(0, 2);
                } 
                else if (grid.type[2] == RoadNumberType.Three) 
                {
                    rayRoad[0] = Random.Range(0, 3);
                }
            }else if (enterDir == Dir.down)
            {
                if (grid.type[0] == RoadNumberType.Two)
                {
                    rayRoad[0] = Random.Range(0, 2);
                }
                else if (grid.type[0] == RoadNumberType.Three)
                {
                    rayRoad[0] = Random.Range(0, 3);
                }
            }
            else if (enterDir == Dir.left)
            {
                if (grid.type[1] == RoadNumberType.Two)
                {
                    rayRoad[0] = Random.Range(0, 2);
                }
                else if (grid.type[1] == RoadNumberType.Three)
                {
                    rayRoad[0] = Random.Range(0, 3);
                }
            }
            else if (enterDir == Dir.right)
            {
                if (grid.type[3] == RoadNumberType.Two)
                {
                    rayRoad[0] = Random.Range(0, 2);
                }
                else if (grid.type[3] == RoadNumberType.Three)
                {
                    rayRoad[0] = Random.Range(0, 3);
                }
            }
            //随机出去车道
            if (outDir == Dir.up)
            {
                if (grid.type[0] == RoadNumberType.Two)
                {
                    rayRoad[1] = Random.Range(0, 2);
                }
                else if (grid.type[0] == RoadNumberType.Three)
                {
                    rayRoad[1] = Random.Range(0, 3);
                }
            }
            else if (outDir == Dir.down)
            {
                if (grid.type[2] == RoadNumberType.Two)
                {
                    rayRoad[1] = Random.Range(0, 2);
                }
                else if (grid.type[2] == RoadNumberType.Three)
                {
                    rayRoad[1] = Random.Range(0, 3);
                }
            }
            else if (outDir == Dir.left)
            {
                if (grid.type[3] == RoadNumberType.Two)
                {
                    rayRoad[1] = Random.Range(0, 2);
                }
                else if (grid.type[3] == RoadNumberType.Three)
                {
                    rayRoad[1] = Random.Range(0, 3);
                }
            }
            else if (outDir == Dir.right)
            {
                if (grid.type[1] == RoadNumberType.Two)
                {
                    rayRoad[1] = Random.Range(0, 2);
                }
                else if (grid.type[1] == RoadNumberType.Three)
                {
                    rayRoad[1] = Random.Range(0, 3);
                }
            }
            return rayRoad;
        }
    }
}