// UTF-8 with BOM — required for Chinese character paths
using System;
using System.Collections.Generic;
using BrewMonster;
using BrewMonster.Scripts.ECModel;
using ModelViewer.Common;
using UnityEditor;
using UnityEngine;

public enum CombinedActionGfxPhase
{
    All,
    Cast,
    Attack,
    Other,
}

public readonly struct CombinedActionGfxEntry
{
    public CombinedActionGfxEntry(
        A3DCombinedAction action,
        FX_BASE_INFO fxEvent,
        string path,
        string actionName,
        string gfxBasename,
        CombinedActionGfxPhase phase)
    {
        Action = action;
        FxEvent = fxEvent;
        Path = path;
        ActionName = actionName;
        GfxBasename = gfxBasename;
        Phase = phase;
    }

    public A3DCombinedAction Action { get; }
    public FX_BASE_INFO FxEvent { get; }
    public string Path { get; }
    public string ActionName { get; }
    public string GfxBasename { get; }
    public CombinedActionGfxPhase Phase { get; }
}

public static class CombinedActionGfxQuery
{
    const string CastToken = "_\u541f\u5531_";
    const string AttackRiseToken = "_\u65bd\u653e\u8d77_";
    const string AttackFallToken = "_\u65bd\u653e\u843d_";

    public static CombinedActionGfxPhase GetPhase(string actionName)
    {
        if (string.IsNullOrEmpty(actionName))
            return CombinedActionGfxPhase.Other;

        if (actionName.Contains(CastToken, StringComparison.Ordinal))
            return CombinedActionGfxPhase.Cast;

        if (actionName.Contains(AttackRiseToken, StringComparison.Ordinal) ||
            actionName.Contains(AttackFallToken, StringComparison.Ordinal))
            return CombinedActionGfxPhase.Attack;

        return CombinedActionGfxPhase.Other;
    }

    public static string GetPhaseLabel(CombinedActionGfxPhase phase)
    {
        return phase switch
        {
            CombinedActionGfxPhase.Cast => "Cast",
            CombinedActionGfxPhase.Attack => "Attack",
            CombinedActionGfxPhase.Other => "Other",
            _ => "All",
        };
    }

    public static IEnumerable<CombinedActionGfxEntry> Scan(CombinedActionSO so)
    {
        if (so?.CombinedActionData == null)
            yield break;

        foreach (A3DCombinedAction action in so.CombinedActionData)
        {
            if (action?.m_EventInfoLst == null)
                continue;

            string actionName = action.m_strName ?? string.Empty;
            CombinedActionGfxPhase phase = GetPhase(actionName);

            foreach (EVENT_INFO eventInfo in action.m_EventInfoLst)
            {
                if (eventInfo is not FX_BASE_INFO fx || fx.m_strFilePaths == null)
                    continue;

                foreach (string path in fx.m_strFilePaths)
                {
                    if (string.IsNullOrWhiteSpace(path) || !path.Contains("gfx", StringComparison.OrdinalIgnoreCase))
                        continue;

                    string basename = LogPanelAnimeScene.GfxBasename(path);
                    if (string.IsNullOrEmpty(basename))
                        continue;

                    yield return new CombinedActionGfxEntry(action, fx, path, actionName, basename, phase);
                }
            }
        }
    }

    public static bool MatchesFilters(
        CombinedActionGfxEntry entry,
        CombinedActionGfxPhase phaseFilter,
        string actionFilter,
        string basenameFilter)
    {
        if (phaseFilter != CombinedActionGfxPhase.All && entry.Phase != phaseFilter)
            return false;

        if (!string.IsNullOrWhiteSpace(actionFilter) &&
            entry.ActionName.IndexOf(actionFilter, StringComparison.OrdinalIgnoreCase) < 0)
            return false;

        if (!string.IsNullOrWhiteSpace(basenameFilter) &&
            entry.GfxBasename.IndexOf(basenameFilter, StringComparison.OrdinalIgnoreCase) < 0)
            return false;

        return true;
    }

    public static bool RemoveEntry(CombinedActionSO so, CombinedActionGfxEntry entry)
    {
        return RemovePath(so, entry.Action, entry.FxEvent, entry.Path);
    }

    public static bool RemovePath(CombinedActionSO so, A3DCombinedAction action, FX_BASE_INFO fxEvent, string path)
    {
        if (so == null || action == null || fxEvent == null || string.IsNullOrWhiteSpace(path))
            return false;

        Undo.RecordObject(so, "Remove GFX Event");

        if (!ApplyRemoval(action, fxEvent, path))
            return false;

        EditorUtility.SetDirty(so);
        AssetDatabase.SaveAssets();
        return true;
    }

    public static int RemoveMatchingBasenameFromPhase(
        CombinedActionSO so,
        string basename,
        CombinedActionGfxPhase phase)
    {
        if (so == null || string.IsNullOrWhiteSpace(basename) || phase == CombinedActionGfxPhase.All)
            return 0;

        Undo.RecordObject(so, "Remove GFX Events");

        int removed = 0;
        var toRemove = new List<(A3DCombinedAction action, FX_BASE_INFO fx, string path)>();

        foreach (CombinedActionGfxEntry entry in Scan(so))
        {
            if (entry.Phase != phase)
                continue;

            if (!string.Equals(entry.GfxBasename, basename, StringComparison.OrdinalIgnoreCase))
                continue;

            toRemove.Add((entry.Action, entry.FxEvent, entry.Path));
        }

        foreach ((A3DCombinedAction action, FX_BASE_INFO fx, string path) item in toRemove)
        {
            if (ApplyRemoval(item.action, item.fx, item.path))
                removed++;
        }

        if (removed > 0)
        {
            EditorUtility.SetDirty(so);
            AssetDatabase.SaveAssets();
        }

        return removed;
    }

    static bool ApplyRemoval(A3DCombinedAction action, FX_BASE_INFO fxEvent, string path)
    {
        if (action == null || fxEvent == null || string.IsNullOrWhiteSpace(path))
            return false;

        if (fxEvent.m_strFilePaths != null && fxEvent.m_strFilePaths.Count > 1)
        {
            if (!fxEvent.m_strFilePaths.Remove(path))
                return false;

            if (fxEvent.m_strFilePaths.Count == 0 && action.m_EventInfoLst != null)
                action.m_EventInfoLst.Remove(fxEvent);
        }
        else if (action.m_EventInfoLst != null)
        {
            if (!action.m_EventInfoLst.Remove(fxEvent))
                return false;
        }
        else
        {
            return false;
        }

        return true;
    }
}