using UnityEngine;
using UnityEngine.UI;
using TMPro;

public class SongDetailsUI : MonoBehaviour
{
    [Header("this_song_SO")]
    public ScriptableObject this_song_SO;

    [Header("basic UI")]
    public Image song_bgImage;

    public Text songNameText;
    public Text artistNameText;
    public Text painterNameText;
    public Text difficultyText;
    public Text difficultyDesciptionText;
    public Text charterNameText;
    public Text dlcNameText;
    public TextMeshProUGUI bpmText;
    public Text songSerialNumberText;
    public Text personalRecordText;

    // Documentation text normalized.
    public Text chartScoreText;

    public Text thisSong_progressText;
    public Text thisSong_lastScoreText; // will show last run total score if available
    public Text idolRecordText;
    public TextMeshProUGUI timeSpentText;
    public TextMeshProUGUI enterTimeText;
    public Text difficultyIdText;
    public Image progressImage;
    public GameObject progressNumberObject;
    public TextMeshProUGUI progressPercentText;

    public Image rankLevel_img;
    public RankConfig rc;
    //public Image songImage;

    public int id_of_thisSong;

    [Header("Inspector")]
    public GameObject picDetail;
    public Image profound_image;
    public Text detail_informations_text;

    [Header("Inspector")]
    public Button Button_EZ;
    public Button Button_HD;
    public Button Button_IN;
    public Button Button_IM;

    private SongData currentSong;

    void Start()
    {
        if (SongDataHolder.SelectedSongData != null)
        {
            // Documentation text normalized.
            currentSong = SongDataHolder.SelectedSongData;
            this_song_SO = currentSong;

            song_bgImage.sprite = currentSong.backgroudPIC;
            // Documentation text normalized.
            songNameText.text = currentSong.songName;
            artistNameText.text = currentSong.artistName;
            painterNameText.text = currentSong.painter;
            charterNameText.text = currentSong.level_creator;
            dlcNameText.text = currentSong.belongsTo_whichDLC;
            songSerialNumberText.text = currentSong.songID.ToString();
            
            bpmText.text = "BPM : " + currentSong.bpm.ToString();
            profound_image.sprite = currentSong.fullscreen_songPicture;

            if (timeSpentText != null) timeSpentText.text = "PlayTime: " + currentSong.time_totalPlayingTime.ToString("F0") + "s";
            if (enterTimeText != null) enterTimeText.text = "PlayCount: " + currentSong.game_enterTimes.ToString();

            id_of_thisSong = currentSong.songID;
            detail_informations_text.text =
                 $"{currentSong.artistName}" + " - " +
                $"{currentSong.songName}" + " | " +
                $"曲绘: {currentSong.painter}" + " | " +
                $"制谱: {currentSong.level_creator}" + " | " +
                $"DLC: {currentSong.belongsTo_whichDLC}";
            if (currentSong.illustration != null)
            {
                //songImage.sprite = currentSong.illustration;
                //songImage.enabled = true;
            }
            else
            {
                Debug.LogWarning("歌曲封面为空：" + currentSong.songName);
            }

            Debug.Log("加载歌曲数据: " + currentSong.songName);
        }
        else
        {
            // Documentation text normalized.
        }

        picDetail.SetActive(false);

        // Documentation text normalized.
        if (currentSong != null)
        {
            SetDifficultyButtons(currentSong.thisLevel_selectedDifficultyID);
            UpdateDifficultyUI(currentSong.thisLevel_selectedDifficultyID);
            Button_EZ.onClick.AddListener(() => OnDifficultySelected(0));
            Button_HD.onClick.AddListener(() => OnDifficultySelected(1));
            Button_IN.onClick.AddListener(() => OnDifficultySelected(2));
            Button_IM.onClick.AddListener(() => OnDifficultySelected(3));
        }
    }

    private void SetDifficultyButtons(int selectedDifficulty)
    {
        Button_EZ.image.color = new Color(1, 1, 1, selectedDifficulty == 0 ? 1 : 0);
        Button_HD.image.color = new Color(1, 1, 1, selectedDifficulty == 1 ? 1 : 0);
        Button_IN.image.color = new Color(1, 1, 1, selectedDifficulty == 2 ? 1 : 0);
        Button_IM.image.color = new Color(1, 1, 1, selectedDifficulty == 3 ? 1 : 0);
    }

    private void OnDifficultySelected(int difficulty)
    {
        if (currentSong != null)
        {
            currentSong.thisLevel_selectedDifficultyID = difficulty;
            SetDifficultyButtons(difficulty);
            UpdateDifficultyUI(difficulty);
        }
    }

    private void UpdateDifficultyUI(int difficulty)
    {
        var entry = GetChartEntry(difficulty);
        if (entry != null)
        {
            difficultyText.text = entry.difficultyLEVEL.ToString();
            difficultyDesciptionText.text = entry.difficultyDescription;

            if (difficultyIdText != null)
                difficultyIdText.text = entry.difficultyLEVEL.ToString();

            if (progressImage != null)
                progressImage.fillAmount = entry.levelProgressForThisDifficulty;

            UpdateProgressUI(entry.levelProgressForThisDifficulty);

            // read values from SongData (SO)
            int chartPersonal = currentSong.GetPersonalRecord(difficulty); // Documentation text normalized.
            int idol = currentSong.GetIdolRecord(difficulty); // Documentation text normalized.

            // Determine total: prefer stored total if present (>0), otherwise compute chartPersonal + idol
            int total;
            if (entry.totalPersonalRecordForThisDifficulty > 0)
            {
                total = entry.totalPersonalRecordForThisDifficulty;
            }
            else
            {
                total = chartPersonal + idol;
            }

            // show total (personalRecord) and idol separately
            personalRecordText.text = total.ToString();
            if (idolRecordText != null)
                idolRecordText.text = idol.ToString();

            // Documentation text normalized.
            if (chartScoreText != null)
                chartScoreText.text = chartPersonal.ToString();

            // show last run total score if UI text provided
            if (thisSong_lastScoreText != null)
            {
                int lastRun = currentSong.GetChartScore(difficulty);
                thisSong_lastScoreText.text = lastRun.ToString();
            }

            if (rankLevel_img != null && rc != null)
                rankLevel_img.sprite = rc.GetRankSprite(total);

            // also keep per-entry convenience fields in sync for inspector visibility
            entry.chartPersonalRecordForThisDifficulty = chartPersonal;
            entry.idolPersonalRecordForThisDifficulty = idol;
            entry.totalPersonalRecordForThisDifficulty = total;
        }
        else
        {
            difficultyText.text = difficulty.ToString();
            if (difficultyIdText != null)
                difficultyIdText.text = difficulty.ToString();
            if (progressImage != null)
                progressImage.fillAmount = 0f;
            UpdateProgressUI(0f);
            difficultyDesciptionText.text = "";
            personalRecordText.text = "0";
            if (idolRecordText != null)
                idolRecordText.text = "0";
            if (chartScoreText != null)
                chartScoreText.text = "0";
            if (thisSong_lastScoreText != null)
                thisSong_lastScoreText.text = "0";
            if (rankLevel_img != null && rc != null)
                rankLevel_img.sprite = rc.defaultSprite;
        }
    }

    private void UpdateProgressUI(float progress)
    {
        // 1. Update Text (can exceed 100%)
        if (progressPercentText != null)
        {
            progressPercentText.text = Mathf.FloorToInt(progress * 100f).ToString() + "%";
        }

        // 2. Clamp for visual elements (fillAmount and Object position)
        float clampedProgress = Mathf.Clamp01(progress);

        // Update fillAmount again just in case, though handled in caller
        if (progressImage != null)
        {
            progressImage.fillAmount = clampedProgress;
        }

        // 3. Update Object Position (Linear transformation: 0% -> -785, 100% -> -195)
        if (progressNumberObject != null)
        {
            RectTransform rect = progressNumberObject.GetComponent<RectTransform>();
            if (rect != null)
            {
                float targetX = Mathf.Lerp(-785f, -195f, clampedProgress);
                Vector2 anchoredPos = rect.anchoredPosition;
                anchoredPos.x = targetX;
                rect.anchoredPosition = anchoredPos;
            }
        }
    }

    private ChartFileEntry GetChartEntry(int difficulty)
    {
        foreach (var entry in currentSong.chartFiles)
        {
            if (entry.difficulty == difficulty)
                return entry;
        }
        return null;
    }
}