using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace GameFramework
{
    /// <summary>
    /// 结算界面 UI 控制器 —— 支持胜利/失败双界面。
    /// 
    /// 胜利：显示"你做到了" + 魂灵数量 + 新记录标识（如有）
    /// 失败：显示"你迷失了" + 去色底图
    /// 
    /// 通过 GameManager.GameState 判断胜负。
    /// </summary>
    public class ScoringUIController : MonoBehaviour
    {
        [Header("底图")]
        [SerializeField] private Image bgImage;
        [SerializeField] private Sprite bgSprite;         // bg.png（胜利彩色/失败去色共用同一张）

        [Header("胜利面板")]
        [SerializeField] private GameObject winPanel;
        [SerializeField] private Image winTitleImage;     // "你做到了" 图片
        [SerializeField] private Sprite winTitleSprite;   // nizuodaol.png
        [SerializeField] private Text soulCountText;      // 魂灵数量
        [SerializeField] private Image soulCountBgImage;  // 魂灵数量底图
        [SerializeField] private Sprite soulCountBgSprite; // bgpoint.png
        [SerializeField] private Image newRecordImage;    // "新记录" 图片
        [SerializeField] private Sprite newRecordSprite;  // 新纪录.png
        [SerializeField] private Image scoreLabelImage;   // "拯救魂灵" 图片
        [SerializeField] private Sprite scoreLabelSprite;

        [Header("失败面板")]
        [SerializeField] private GameObject losePanel;
        [SerializeField] private Image loseTitleImage;    // "你迷失了" 图片
        [SerializeField] private Sprite loseTitleSprite;  // nizuodaol.png 副本

        [Header("排行榜")]
        [SerializeField] private GameObject leaderboardPanel;
        [SerializeField] private Transform leaderboardContainer;
        [SerializeField] private Text finalScoreText;

        [Header("新纪录输入")]
        [SerializeField] private GameObject newHighScorePanel;
        [SerializeField] private InputField nameInputField;
        [SerializeField] private Button submitButton;
        [SerializeField] private Button cancelButton;

        [Header("导航")]
        [SerializeField] private Button mainMenuButton;
        [SerializeField] private Image mainMenuButtonImage; // 主界面.png
        [SerializeField] private Sprite mainMenuBtnSprite;

        [Header("装饰")]
        [SerializeField] private Image lineImage;
        [SerializeField] private Sprite lineSprite;
        [SerializeField] private Image bgPointImage;
        [SerializeField] private Sprite bgPointSprite;

        [Header("Audio")]
        [SerializeField] private AudioData submitSFX;
        [SerializeField] private AudioData cancelSFX;

        private bool _isWin;

        void Start()
        {
            // 判断胜负
            _isWin = (GameManager.GameState == GameState.Victory);

            // 绑定按钮
            if (submitButton != null)
                submitButton.onClick.AddListener(OnSubmitClick);
            if (cancelButton != null)
                cancelButton.onClick.AddListener(OnCancelClick);
            if (mainMenuButton != null)
                mainMenuButton.onClick.AddListener(OnMainMenuClick);

            // 初始隐藏所有面板
            SetPanelActive(winPanel, false);
            SetPanelActive(losePanel, false);
            SetPanelActive(leaderboardPanel, false);
            SetPanelActive(newHighScorePanel, false);

            // 设置底图（共用同一张，失败时去色）
            if (bgImage != null && bgSprite != null)
            {
                bgImage.sprite = bgSprite;
                bgImage.color = _isWin ? Color.white : new Color(0.4f, 0.4f, 0.45f, 1f); // 失败去色
            }

            // 设置装饰图片
            if (lineImage != null && lineSprite != null)
                lineImage.sprite = lineSprite;
            if (bgPointImage != null && bgPointSprite != null)
                bgPointImage.sprite = bgPointSprite;

            // 设置返回主界面按钮图片
            if (mainMenuButtonImage != null && mainMenuBtnSprite != null)
                mainMenuButtonImage.sprite = mainMenuBtnSprite;

            if (_isWin)
            {
                ShowWinScreen();
            }
            else
            {
                ShowLoseScreen();
            }
        }

        /// <summary>
        /// 显示胜利界面。
        /// </summary>
        void ShowWinScreen()
        {
            SetPanelActive(winPanel, true);
            SetPanelActive(losePanel, false);

            // 设置“你做到了”图片
            if (winTitleImage != null && winTitleSprite != null)
                winTitleImage.sprite = winTitleSprite;
            
            // 设置魂灵数量底图
            if (soulCountBgImage != null && soulCountBgSprite != null)
                soulCountBgImage.sprite = soulCountBgSprite;
            
            // 显示魂灵数量（复用 ScoreManager）
            int score = ScoreManager.Instance != null ? ScoreManager.Instance.CurrentScore : 0;
            if (soulCountText != null)
                soulCountText.text = score.ToString();
            
            // 设置“拯救魂灵”图片
            if (scoreLabelImage != null && scoreLabelSprite != null)
                scoreLabelImage.sprite = scoreLabelSprite;

            // 判断是否新纪录
            bool isNewRecord = ScoreManager.Instance != null && ScoreManager.Instance.HasNewHighScore;
            if (newRecordImage != null)
            {
                newRecordImage.gameObject.SetActive(isNewRecord);
                if (isNewRecord && newRecordSprite != null)
                    newRecordImage.sprite = newRecordSprite;
            }

            // 新纪录时显示输入面板，否则直接显示排行榜
            if (isNewRecord)
            {
                ShowNewHighScorePanel();
            }
            else
            {
                ShowLeaderboard();
            }
        }

        /// <summary>
        /// 显示失败界面。
        /// </summary>
        void ShowLoseScreen()
        {
            SetPanelActive(winPanel, false);
            SetPanelActive(losePanel, true);

            // 设置"你迷失了"图片
            if (loseTitleImage != null && loseTitleSprite != null)
                loseTitleImage.sprite = loseTitleSprite;

            // 失败也显示排行榜
            ShowLeaderboard();
        }

        /// <summary>
        /// 显示新纪录输入面板。
        /// </summary>
        void ShowNewHighScorePanel()
        {
            SetPanelActive(newHighScorePanel, true);
            SetPanelActive(leaderboardPanel, false);

            if (nameInputField != null)
            {
                nameInputField.text = "";
                nameInputField.ActivateInputField();
            }
        }

        /// <summary>
        /// 显示排行榜。
        /// </summary>
        void ShowLeaderboard()
        {
            SetPanelActive(newHighScorePanel, false);
            SetPanelActive(leaderboardPanel, true);
            UpdateLeaderboardDisplay();

            if (mainMenuButton != null)
                mainMenuButton.Select();
        }

        /// <summary>
        /// 更新排行榜显示。
        /// </summary>
        void UpdateLeaderboardDisplay()
        {
            if (ScoreManager.Instance == null || leaderboardContainer == null) return;

            var data = ScoreManager.Instance.LoadPlayerScoreData();

            for (int i = 0; i < leaderboardContainer.childCount; i++)
            {
                Transform entry = leaderboardContainer.GetChild(i);
                bool hasData = i < data.list.Count;

                Text rankText = FindTextByName(entry, "Rank");
                Text scoreText = FindTextByName(entry, "Score");
                Text nameText = FindTextByName(entry, "Name");

                if (hasData)
                {
                    var score = data.list[i];
                    if (rankText != null) rankText.text = $"{i + 1}.";
                    if (scoreText != null) scoreText.text = score.score.ToString();
                    if (nameText != null) nameText.text = score.playerName;
                    entry.gameObject.SetActive(true);
                }
                else
                {
                    if (rankText != null) rankText.text = $"{i + 1}.";
                    if (scoreText != null) scoreText.text = "---";
                    if (nameText != null) nameText.text = "---";
                    entry.gameObject.SetActive(true);
                }
            }
        }

        Text FindTextByName(Transform parent, string name)
        {
            Transform t = parent.Find(name);
            if (t != null)
                return t.GetComponent<Text>();
            return parent.GetComponent<Text>();
        }

        void SetPanelActive(GameObject panel, bool active)
        {
            if (panel != null)
                panel.SetActive(active);
        }

        #region Button Handlers
        void OnSubmitClick()
        {
            string playerName = "";
            if (nameInputField != null)
                playerName = nameInputField.text;
            if (string.IsNullOrEmpty(playerName))
                playerName = "Player";

            if (ScoreManager.Instance != null)
                ScoreManager.Instance.SavePlayerScore(playerName);

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

            ShowLeaderboard();
        }

        void OnCancelClick()
        {
            if (ScoreManager.Instance != null)
                ScoreManager.Instance.SavePlayerScore("Player");

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

            ShowLeaderboard();
        }

        void OnMainMenuClick()
        {
            if (SceneLoader.Instance != null)
                SceneLoader.Instance.LoadMainMenuScene();
        }
        #endregion
    }
}