using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;

namespace GameFramework
{
    /// <summary>
    /// 游戏结果类型。
    /// </summary>
    public enum GameResult { Win, Lose }

    /// <summary>
    /// 游戏结果界面（支持胜利/失败）。
    /// 监听 GameManager.onGameOver 和 onGameWin 事件，
    /// 显示对应面板并暂停游戏。确认后跳转到排行榜场景。
    /// </summary>
    public class GameResultScreen : MonoBehaviour
    {
        [Header("Canvas")]
        [SerializeField] private Canvas resultCanvas;

        [Header("胜利面板")]
        [SerializeField] private GameObject winPanel;
        [SerializeField] private Button winConfirmButton;
        [SerializeField] private Text winTitleText;
        [SerializeField] private Text winScoreText;

        [Header("失败面板")]
        [SerializeField] private GameObject losePanel;
        [SerializeField] private Button loseConfirmButton;
        [SerializeField] private Text loseTitleText;
        [SerializeField] private Text loseScoreText;

        [Header("Audio")]
        [SerializeField] private AudioData winSFX;
        [SerializeField] private AudioData loseSFX;

        [Header("Input")]
        [SerializeField] private KeyCode confirmKey = KeyCode.Return;

        private bool _isVisible;

        /// <summary>
        /// 运行时初始化所有引用（由 GameManager 自动创建时调用）。
        /// </summary>
        public void Initialize(Canvas canvas, GameObject win, Button winBtn, Text winTitle, Text winScore,
            GameObject lose, Button loseBtn, Text loseTitle, Text loseScore)
        {
            resultCanvas = canvas;
            winPanel = win;
            winConfirmButton = winBtn;
            winTitleText = winTitle;
            winScoreText = winScore;
            losePanel = lose;
            loseConfirmButton = loseBtn;
            loseTitleText = loseTitle;
            loseScoreText = loseScore;
        }

        void OnEnable()
        {
            GameManager.onGameOver += OnGameOver;
            GameManager.onGameWin += OnGameWin;
        }

        void OnDisable()
        {
            GameManager.onGameOver -= OnGameOver;
            GameManager.onGameWin -= OnGameWin;
        }

        void OnGameOver()
        {
            // 失败时由 GameLostOverlay 接管，不再显示旧失败面板
        }
        void OnGameWin() => ShowResult(GameResult.Win);

        void Start()
        {
            // 初始隐藏
            if (resultCanvas != null)
                resultCanvas.enabled = false;

            // 绑定按钮
            if (winConfirmButton != null)
                winConfirmButton.onClick.AddListener(OnConfirmClick);
            if (loseConfirmButton != null)
                loseConfirmButton.onClick.AddListener(OnConfirmClick);
        }

        /// <summary>
        /// 显示游戏结果界面。
        /// </summary>
        public void ShowResult(GameResult result)
        {
            _isVisible = true;

            // 显示 Canvas
            if (resultCanvas != null)
                resultCanvas.enabled = true;

            // 更新分数显示
            int score = ScoreManager.Instance != null ? ScoreManager.Instance.CurrentScore : 0;

            if (result == GameResult.Win)
            {
                // 显示胜利面板，隐藏失败面板
                if (winPanel != null) winPanel.SetActive(true);
                if (losePanel != null) losePanel.SetActive(false);

                if (winScoreText != null) winScoreText.text = $"分数: {score}";
                if (winConfirmButton != null) winConfirmButton.Select();

                if (AudioManager.Instance != null && winSFX != null)
                    AudioManager.Instance.PlaySFX(winSFX);
            }
            else
            {
                // 显示失败面板，隐藏胜利面板
                if (winPanel != null) winPanel.SetActive(false);
                if (losePanel != null) losePanel.SetActive(true);

                if (loseScoreText != null) loseScoreText.text = $"分数: {score}";
                if (loseConfirmButton != null) loseConfirmButton.Select();

                if (AudioManager.Instance != null && loseSFX != null)
                    AudioManager.Instance.PlaySFX(loseSFX);
            }

            // 暂停游戏
            if (TimeController.Instance != null)
            {
                TimeController.Instance.Pause();
            }
            else
            {
                // 没有 TimeController 时直接设置 timeScale
                Time.timeScale = 0f;
            }

            // 显示鼠标
            Cursor.visible = true;
            Cursor.lockState = CursorLockMode.None;
        }

        void Update()
        {
            if (!_isVisible) return;

            // 按确认键跳转
            if (Input.GetKeyDown(confirmKey) || Input.GetKeyDown(KeyCode.Space))
            {
                OnConfirmClick();
            }
        }

        void OnConfirmClick()
        {
            _isVisible = false;

            // 解除暂停
            if (TimeController.Instance != null)
            {
                TimeController.Instance.Unpause();
            }
            else
            {
                Time.timeScale = 1f;
            }

            // 跳转到排行榜
            if (SceneLoader.Instance != null)
            {
                SceneLoader.Instance.LoadScoringScene();
            }
            else
            {
                // 没有 SceneLoader 时直接加载场景
                SceneManager.LoadScene("Scoring");
            }
        }
    }
}