using System;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.SceneManagement;
using UnityEngine.UIElements;

public class PlayToyController : MonoBehaviour
{
    private float throwTime;
    private float xForce, yForce;
    Vector2 mouseStartPosition = new(0f, 0f);
    Vector2 mouseEndPosition = new(0f, 0f);
    // forceAdjust 用于调节力量参数，数字越大减力效果越高
    public int forceAdjust = 100;
    
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    //void Start()
    //{
    //    Physics.gravity = new Vector3(0, -9.81f, 0);
    //}

    // FixedUpdate is called once per frame
    void FixedUpdate()
    {
        if (PlayData.gameStatus == PlayData.GameStatus.inProgress)
        {
            DogCatchToy();
        }
        else if (PlayData.gameStatus != PlayData.GameStatus.notStart) // 游戏结束状态
        {
            ShowGameResult();
        }
    }



    public void Throw(InputAction.CallbackContext context)
    {
        //Debug.Log(context.control.device);
        if (PlayData.gameStatus == PlayData.GameStatus.inProgress) { return; }

        // 按下鼠标
        if (context.phase == InputActionPhase.Started)
        {

            Ray ray = Camera.main.ScreenPointToRay(Pointer.current.position.ReadValue());
            if (Physics.Raycast(ray, out RaycastHit hit))
            {
                Debug.Log($"Clicked on: {hit.collider.gameObject.tag}");
                // 射线检测起始点击是否在飞盘上
                if (hit.collider.gameObject.name == "toy")
                {
                    PlayData.isMouseStartOnTarget = true;
                    mouseStartPosition = Pointer.current.position.ReadValue();
                }
            }
        }

        // 松开鼠标
        if (context.phase == InputActionPhase.Canceled && PlayData.isMouseStartOnTarget)
        {
            mouseEndPosition = Pointer.current.position.ReadValue();
            Debug.Log("Drag end time at: " + context.duration);
            throwTime = Convert.ToSingle(context.duration);
            xForce = (mouseEndPosition.x - mouseStartPosition.x)/throwTime/forceAdjust;
            yForce = (mouseEndPosition.y - mouseStartPosition.y)/throwTime/forceAdjust;
            Debug.Log("xForce is: " + xForce);
            Debug.Log("yForce is: " + yForce);
            if (yForce > 1 && yForce > xForce) // 确保是向前飞出飞盘
            {
                addThrowForce();
            }
            // 重置值
            mouseStartPosition = Vector2.zero;
            mouseEndPosition = Vector2.zero;
        }
    }

    // 飞碟飞出后，给飞碟添加一个力
    public void addThrowForce()
    {
        float verticalForce = 6; // 定义垂直方向力量
        var toy = GameObject.Find("toy");
        PlayData.throwStartPoision = toy.transform.position;  // 上报飞盘其实位置
        PlayData.gameStatus = PlayData.GameStatus.inProgress;   // 游戏状态设置为进行中
        Rigidbody rb = toy.GetComponent<Rigidbody>();
        Vector3 force = new Vector3(xForce, verticalForce, yForce);
        rb.isKinematic = false;
        rb.AddForce(force, ForceMode.Impulse);
        PlayData.gameStatus = PlayData.GameStatus.inProgress;
    }

    // 飞碟飞出后，狗追逐飞碟
    public void DogCatchToy()
    {
        var dog = GameObject.Find("dog");
        var toy = GameObject.Find("toy");
        DogProperty dogProperty = EnviromentSetting.puppies[0]; // 读取狗的数据
        float turnSpeed = 90.0f; // 每秒最多旋转角度
    //dog.transform.LookAt(fisbee.transform.position);

        if (toy.transform.position.y < 0.43 && PlayData.gameStatus == PlayData.GameStatus.inProgress)
        {
            PlayData.gameStatus = PlayData.GameStatus.finishFail;   // 游戏状态设置为失败。狗依然在追逐飞盘，但是飞盘已经落地
            Debug.Log("飞盘落地了");
        }
        else if (dog != null && toy != null)
        {
            // 计算目标方向
            Vector3 direction = toy.transform.position - dog.transform.position;
            direction.y = 0; // 忽略垂直方向的偏移
            var targetPosition = toy.transform.position;
            targetPosition.y = 0.4f;
            Quaternion targetRotation = new();

            // 创建目标旋转
            if (direction != Vector3.zero)
            {
                targetRotation = Quaternion.LookRotation(direction);
            }

            // 平滑旋转到目标方向
            dog.transform.rotation = Quaternion.RotateTowards(dog.transform.rotation, targetRotation, turnSpeed * Time.deltaTime);

            float dogSpeed = dogProperty.runSpeed/10;   // 狗向飞盘移动
            dog.transform.position = Vector3.MoveTowards(dog.transform.position, targetPosition, dogSpeed * Time.deltaTime);

            // 狗切换到跑步状态
            Animator animator = dog.GetComponent<Animator>();
            if (animator.GetBool("runState") != true) { animator.SetBool("runState", true); }
        }
        else
        {
            Debug.LogError("Dog or toy object is not assigned!");
        }
    }

    // 初始化 playground UI 的按键语言
    public void UILanguageInit()
    {
        var root = GameObject.Find("PlaygroundUIDocument").GetComponent<UIDocument>().rootVisualElement;
        var btnArea = root.Q<VisualElement>("btnArea");
        var confirmBtn = btnArea.Q<Button>("confirm");
        var playagainBtn = btnArea.Q<Button>("playAgain");

        string textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "playgroundUI", "button", "confirm", EnviromentSetting.languageCode });
        confirmBtn.text = textValue;
        textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "playgroundUI", "button", "play_again", EnviromentSetting.languageCode });
        playagainBtn.text = textValue;

        playagainBtn.clicked += ()=> GameReset();
    }

    // 游戏结束显示结果
    public void ShowGameResult()
    {
        if (PlayData.isResultShowed == false)
        {
            var playgroundUI = GameObject.Find("PlaygroundPlaceholder").transform.Find("PlaygroundUI").gameObject;
            playgroundUI.SetActive(true);
            UILanguageInit();
            var root = GameObject.Find("PlaygroundUIDocument").GetComponent<UIDocument>().rootVisualElement;
            var gameResult = root.Q<Label>("gameResult");
            string textValue;
            if (PlayData.gameStatus == PlayData.GameStatus.finishSuccess)
            {
                textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "playgroundUI", "label", "game_result", "finishSuccess", EnviromentSetting.languageCode });
                textValue = textValue.Replace("<<distance>>", Math.Round(PlayData.throwDistance(), 2).ToString());   // 保留小数点后2位
                gameResult.text = textValue;
            }
            else if (PlayData.gameStatus == PlayData.GameStatus.finishFail)
            {
                textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "playgroundUI", "label", "game_result", "finishFail", EnviromentSetting.languageCode });
                gameResult.text = textValue;
            }
            else if (PlayData.gameStatus == PlayData.GameStatus.finishOutOfBound)
            {
                textValue = EnviromentSetting.GetValueAtPath(EnviromentSetting.languageData, new string[] { "playgroundUI", "label", "game_result", "finishOutOfBound", EnviromentSetting.languageCode });
                gameResult.text = textValue;
            }
        }
        PlayData.isResultShowed = true;
    }

    // 游戏重置
    public void GameReset()
    {
        PlayData.Reset();
        // 获取当前场景的名称
        string currentSceneName = SceneManager.GetActiveScene().name;
        // 重新加载当前场景
        SceneManager.LoadScene(currentSceneName);
    }
}




public static class  PlayData
{
    public static bool throwHitWall = false; // 飞盘是否撞到空气墙
    public static bool throwCatched = false; // 飞盘是否被狗接到
    public static bool isResultShowed = false;  // 是否显示游戏结果
    public static bool isMouseStartOnTarget = false;  // 是否鼠标滑动开始在允许的目标上
    public static Vector3 throwStartPoision = Vector3.zero;
    public static Vector3 throwEndPosition = Vector3.zero;
    public enum GameStatus
    {
        notStart,
        inProgress,
        finishSuccess,
        finishFail,
        finishOutOfBound
    }
    public static GameStatus gameStatus = GameStatus.notStart;
    //public static string gameStatus = "not start";

    public static float throwDistance()
    {
        if (gameStatus == GameStatus.finishSuccess) {
            Debug.Log("start position is"+throwStartPoision);
            Debug.Log("end position is" + throwEndPosition);
            return Vector3.Distance(throwEndPosition, throwStartPoision);
        }
        else { return 0; }
    }

    public static void Reset()
    {
        PlayData.throwHitWall = false; // 飞盘是否撞到空气墙
        PlayData.throwCatched = false; // 飞盘是否被狗接到
        PlayData.isResultShowed = false;  // 是否显示游戏结果
        PlayData.isMouseStartOnTarget = false;  // 是否鼠标滑动开始在允许的目标上
        PlayData.throwStartPoision = Vector3.zero;
        PlayData.throwEndPosition = Vector3.zero;
        PlayData.gameStatus = GameStatus.notStart ;
}
}