using System.IO;
using UnityEditor;
using UnityEngine;
using AppleHills.Core.Settings;

namespace Editor.Tools
{
    /// <summary>
    /// Editor script that automatically clears saves before entering play mode
    /// if the autoClearSaves setting is enabled in DebugSettings
    /// </summary>
    [InitializeOnLoad]
    public static class AutoClearSavesOnPlay
    {
        static AutoClearSavesOnPlay()
        {
            EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
        }

        private static void OnPlayModeStateChanged(PlayModeStateChange state)
        {
            // Only act when entering play mode (before the scene starts playing)
            if (state != PlayModeStateChange.ExitingEditMode)
                return;

            // Try to load the debug settings
            DebugSettings debugSettings = LoadDebugSettings();
            
            if (debugSettings == null)
            {
                Debug.LogWarning("[AutoClearSaves] Could not find DebugSettings asset. Auto-clear saves disabled.");
                return;
            }

            // Check if auto-clear is enabled
            if (!debugSettings.AutoClearSaves)
            {
                return;
            }

            // Execute the clear saves logic
            ClearSavesFolder();
        }

        private static DebugSettings LoadDebugSettings()
        {
            // Try to find the DebugSettings asset in the project
            string[] guids = AssetDatabase.FindAssets("t:DebugSettings");
            
            if (guids.Length == 0)
            {
                return null;
            }

            // Load the first found DebugSettings asset
            string path = AssetDatabase.GUIDToAssetPath(guids[0]);
            return AssetDatabase.LoadAssetAtPath<DebugSettings>(path);
        }

        private static void ClearSavesFolder()
        {
            // Construct the save folder path (matches SaveLoadManager.DefaultSaveFolder)
            string saveFolder = Path.Combine(Application.persistentDataPath, "GameSaves");
            
            if (!Directory.Exists(saveFolder))
            {
                Debug.Log("[AutoClearSaves] Save folder does not exist, nothing to clear.");
                return;
            }

            try
            {
                // Delete all files in the save folder
                string[] files = Directory.GetFiles(saveFolder);
                int deletedCount = 0;
                
                foreach (string file in files)
                {
                    File.Delete(file);
                    deletedCount++;
                }
                
                if (deletedCount > 0)
                {
                    Debug.Log($"[AutoClearSaves] Automatically deleted {deletedCount} save file(s) before entering play mode");
                }
            }
            catch (System.Exception ex)
            {
                Debug.LogError($"[AutoClearSaves] Failed to auto-clear saves: {ex}");
            }
        }
    }
}