using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class RabbitHuntGameMode : GameMode
{
    GameObject rabbitPrefab;
    Transform hunter;
    Transform animalsBaseT;

    public RabbitHuntGameMode(GameMgr gameMgr) : base(gameMgr) {
        animalsBaseT = GameObject.Find("Animals").transform;
        rabbitPrefab = animalsBaseT.Find("Rabbit").gameObject;
        hunter = this.gameMgr.GetComponentInChildren<ArmBow>().transform;
        lastCreateDistance = GetMeasureVec().magnitude;

        this.gameMgr.transform.Find("RabbitHuntGameSelectLevelView").gameObject.SetActive(true);
    }

    HashSet<Rabbit> rabbits = new HashSet<Rabbit>();
    float lastCreateDistance = 0;
    float time = 60;

    Vector3 GetMeasureVec() {
        Vector3 hunterPos = hunter.position;
        Vector3 animalsBasePos = animalsBaseT.position;
        hunterPos.y = animalsBasePos.y;
        return animalsBasePos - hunterPos;
    }

    void CreateRabbit() {
        if (animalTypeCreateIndex >= animalTypeCreateList.Length) return;
        int animalType = animalTypeCreateList[animalTypeCreateIndex++];

        Vector3 measureVec = GetMeasureVec();
        Vector3 displace = measureVec.normalized * lastCreateDistance;
        lastCreateDistance += 1.5f;
        Vector3 newPos = hunter.position + Quaternion.AngleAxis(30 - Random.value * 60, Vector3.up) * displace;
        GameObject o = GameObject.Instantiate(rabbitPrefab, newPos, Quaternion.identity, animalsBaseT);
        o.SetActive(true);
        Rabbit rabbit = o.GetComponent<Rabbit>();
        rabbit.hp = animalType;
        rabbit.ChangeColorByType(animalType);
        rabbit.RandomRotate(Random.value * 360);
        rabbit.onDie += delegate(Rabbit rb) {
            killCount++;
            rabbits.Remove(rb);
            CreateRabbit();
        };
        rabbits.Add(rabbit);

        if (rabbits.Count < maxAnimalCountAtTheSameTime) {
            CreateRabbit();    
        }
    }

    int killCount = 0;

    int maxAnimalCountAtTheSameTime = 2;

    int[] animalTypeCreateList;
    int animalTypeCreateIndex = 0;

    //设置关卡级别
    public void SetLevel(int level) {
        if (level == 1) {
            animalTypeCreateList = new int[]{1, 1};
        }
        else if (level == 2) {
            animalTypeCreateList = new int[]{2, 2};
        }
        else if (level == 3) {
            animalTypeCreateList = new int[]{3, 3};
        }
        else if (level == 4) {
            animalTypeCreateList = new int[]{1, 1, 2, 2};
        }
        else if (level == 5) {
            animalTypeCreateList = new int[]{1, 1, 1, 3, 3, 3};
        }
        CreateRabbit();
    }

    public override bool DoNextShoot() { 
        if (GameMgr.ins.gameOver) return false; 
        if (animalTypeCreateIndex >= animalTypeCreateList.Length && rabbits.Count == 0) {
            gameMgr.gameOver = true;
            gameMgr.StopGame();
            this.gameMgr.transform.Find("HunterGameSettleView").gameObject.SetActive(true);
            return false;
        }
        return true;
    }

    public override object[] Settle() {
        return new object[]{GetSurplusAnimalCount() <= 0 ? "胜利" : "失败"};
    }

    public override void Update() {
        if (gameMgr.gameOver || pauseTimeCounting) return;
        if (this.time > 0) {
            this.time -= Time.deltaTime;
        } else {
            this.time = 0;
            gameMgr.gameOver = true;
            gameMgr.StopGame();
            //添加结算界面
            this.gameMgr.transform.Find("HunterGameSettleView").gameObject.SetActive(true);
        }
    }

    public string GetTimeStr()
    {
        int seconds = (int) Mathf.Ceil(this.time);
        string str = "";
        int m = seconds / 60; 
        if (m < 10) {
            str += 0;
        }
        str += m;
        str += " : ";
        int s = seconds % 60;
        if (s < 10)
        {
            str += 0;
        }
        str += s;
        return str;
    }

    public int GetSurplusAnimalCount() {
        return this.animalTypeCreateList.Length - killCount;
    }
}