using System.Collections.Generic;
using System.Linq;
using UnityEngine;

public class InGamePerformanceManager : MonoBehaviour
{
    public static InGamePerformanceManager Instance { get; private set; }
    public int HighestComboThisRun { get; private set; }

    [Header("Inspector")]
    [Tooltip("Achievement definitions loaded from Resources.")]
    [SerializeField] private List<InGameAchievementSO> achievementLibrary = new List<InGameAchievementSO>();

    [Header("Inspector")]
    public GameObject archievePrefab;
    public GameObject place_to_putdown;

    [System.Serializable]
    public class CategoryDisplayMapping
    {
        public AchievementCategory category;
        public GameObject parent;
    }

    public List<CategoryDisplayMapping> categoryDisplays = new List<CategoryDisplayMapping>();

    private class UnlockedAchievementInfo
    {
        public AchievementLevel level;
        public InGameAchievementSO sourceSO;
    }

    private readonly Dictionary<AchievementCategory, UnlockedAchievementInfo> unlockedAchievements =
        new Dictionary<AchievementCategory, UnlockedAchievementInfo>();

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            HighestComboThisRun = 0;
            LoadAchievementLibrary();
        }
        else
        {
            Destroy(gameObject);
        }
    }

    private void Start()
    {
        // 如果开启了自动打击模式，直接授予 Autoplay 成就
        if (GameConfig.autoPlayEnabled)
        {
            CheckAutoplayAchievement();
        }
    }

    private void CheckAutoplayAchievement()
    {
        // 查找属于 Autoplay 分类的配置
        var autoplaySO = achievementLibrary.FirstOrDefault(a => a != null && a.category == AchievementCategory.Autoplay);
        if (autoplaySO != null && autoplaySO.levels != null && autoplaySO.levels.Count > 0)
        {
            // 自动打击模式下，直接解锁该分类下的第一个等级（观赏模式成就）
            var level = autoplaySO.levels[0];
            unlockedAchievements.Clear(); // 确保排他性：只保留这一个成就
            unlockedAchievements.Add(AchievementCategory.Autoplay, new UnlockedAchievementInfo
            {
                level = level,
                sourceSO = autoplaySO
            });
            Debug.Log("<color=yellow>[PerformanceManager] 自动打击模式已开启：锁定 Autoplay 成就，禁用其他成就。</color>");
        }
    }

    private void LoadAchievementLibrary()
    {
        achievementLibrary.Clear();

        var loaded = Resources.LoadAll<InGameAchievementSO>("Achievements");
        if (loaded == null || loaded.Length == 0)
            loaded = Resources.LoadAll<InGameAchievementSO>(string.Empty);

        if (loaded == null || loaded.Length == 0)
        {
            Debug.LogError("[PerformanceManager] No InGameAchievementSO found under Resources.");
            return;
        }

        for (int i = 0; i < loaded.Length; i++)
        {
            var so = loaded[i];
            if (so != null && !achievementLibrary.Contains(so))
                achievementLibrary.Add(so);
        }

        Debug.Log($"[PerformanceManager] Loaded {achievementLibrary.Count} achievement categories.");
    }

    public void UpdateCombo(int currentCombo)
    {
        if (currentCombo > HighestComboThisRun)
        {
            HighestComboThisRun = currentCombo;
        }

        CheckAchievementsByCategory(AchievementCategory.Combo, currentCombo);
    }

    public void UpdateTotalCure(float totalCure)
    {
        CheckAchievementsByCategory(AchievementCategory.TotalCure, totalCure);
    }

    public void UpdateTotalDamage(float totalDamage)
    {
        CheckAchievementsByCategory(AchievementCategory.TotalDamage, totalDamage);
    }

    public void UpdateTotalManaRestored(float totalMana)
    {
        CheckAchievementsByCategory(AchievementCategory.TotalManaRestored, totalMana);
    }

    public void UpdateTotalScore(float totalScore)
    {
        CheckAchievementsByCategory(AchievementCategory.TotalScore, totalScore);
    }

    private void CheckAchievementsByCategory(AchievementCategory category, float currentValue)
    {
        // 如果开启了自动打击模式，禁止获得除 Autoplay 以外的任何成就
        if (GameConfig.autoPlayEnabled)
        {
            if (category != AchievementCategory.Autoplay)
                return;
        }

        if (achievementLibrary == null || achievementLibrary.Count == 0)
            return;

        var categorySOs = achievementLibrary.Where(a => a != null && a.category == category);
        foreach (var categorySO in categorySOs)
        {
            if (categorySO.levels == null || categorySO.levels.Count == 0)
                continue;

            var bestLevelForThisSO = categorySO.levels
                .Where(l => l != null && currentValue >= l.triggerValue)
                .OrderByDescending(l => l.triggerValue)
                .FirstOrDefault();

            if (bestLevelForThisSO == null)
                continue;

            if (unlockedAchievements.TryGetValue(category, out var existingInfo))
            {
                if (existingInfo == null || existingInfo.level == null || bestLevelForThisSO.triggerValue > existingInfo.level.triggerValue)
                {
                    unlockedAchievements[category] = new UnlockedAchievementInfo
                    {
                        level = bestLevelForThisSO,
                        sourceSO = categorySO
                    };
                }
            }
            else
            {
                unlockedAchievements.Add(category, new UnlockedAchievementInfo
                {
                    level = bestLevelForThisSO,
                    sourceSO = categorySO
                });
            }
        }
    }

    public void LoadArchievePrefab()
    {
        if (archievePrefab == null)
        {
            Debug.LogWarning("[PerformanceManager] archievePrefab is not assigned.");
            return;
        }

        if (place_to_putdown != null)
        {
            foreach (Transform child in place_to_putdown.transform)
                Destroy(child.gameObject);
        }

        for (int i = 0; i < categoryDisplays.Count; i++)
        {
            var mapping = categoryDisplays[i];
            if (mapping != null && mapping.parent != null)
            {
                foreach (Transform child in mapping.parent.transform)
                    Destroy(child.gameObject);
            }
        }

        var sortedAchievements = unlockedAchievements.Values
            .Where(v => v != null && v.level != null)
            .OrderByDescending(info => (int)info.level.rarity)
            .ToList();

        for (int i = 0; i < sortedAchievements.Count; i++)
        {
            var info = sortedAchievements[i];
            var cat = info.sourceSO != null ? info.sourceSO.category : AchievementCategory.Combo;
            GameObject targetParent = place_to_putdown;

            var mapping = categoryDisplays.FirstOrDefault(m => m != null && m.category == cat && m.parent != null);
            if (mapping != null && mapping.parent != null)
                targetParent = mapping.parent;

            if (targetParent == null)
                continue;

            GameObject prefabToSpawn = (info.sourceSO != null && info.sourceSO.customPrefab != null) ? info.sourceSO.customPrefab : archievePrefab;
            GameObject go = Instantiate(prefabToSpawn, targetParent.transform);
            UI_OrderedEntryAnimator.PlayFadeOnly(go, i, 0.16f, 0.012f, true);

            var script = go.GetComponent<archievePrefab>();
            if (script != null)
                script.Setup(info.level);
        }

        Debug.Log($"[PerformanceManager] Spawned {sortedAchievements.Count} achievement cards.");
    }
}