using System.Collections.Generic;
using System.IO;
using UnityEngine;

namespace MetaCity.BundleKit.Editor
{
    public static class PrefabCollector
    {
        public static void CollectPrefabBundles(List<MetacityBundle> tasks, List<string> skipPrefabs)
        {
            DoCollectPrefabByFolder(tasks, Constants.ExportedAssetFolder, true, skipPrefabs);
            DoCollectPrefabByFolder(tasks, Constants.ImportedAssetFolder, false, skipPrefabs);
        }

        public static List<string> CollectPrefabEntries()
        {
            DirectoryInfo dir = new DirectoryInfo(Constants.ExportedAssetFolder);
            var bundleNames = new List<string>();
            if (!dir.Exists)
            {
                return bundleNames;
            }
            
            foreach (var subDir in dir.GetDirectories())
            {
                var bundleName = Utilities.CreateAssetBundleName(subDir.Name);
                bundleNames.Add(bundleName);
            }

            return bundleNames;
        }

        public static void DoCollectAssetsInFolder(List<string> resourcePaths, string folderPath)
        {
            DirectoryInfo dir = new DirectoryInfo(folderPath);
            
            foreach (var fileInfo in dir.GetFiles())
            {
                if (fileInfo.FullName.EndsWith(".meta"))
                {
                    continue;
                }
                    
                resourcePaths.Add(Path.Combine("Assets", Path.GetRelativePath(Application.dataPath, fileInfo.FullName)));
            }
            
            foreach (var subDir in dir.GetDirectories())
            {
                DoCollectAssetsInFolder(resourcePaths, subDir.FullName);
            }
        }

        private static void DoCollectPrefabByFolder(List<MetacityBundle> tasks, string rootFolder, bool needUpload, List<string> skipPrefabs)
        {
            DirectoryInfo dir = new DirectoryInfo(rootFolder);
            if (!dir.Exists)
            {
                return;
            }
            
            foreach (var subDir in dir.GetDirectories())
            {
                var resourcePaths = new List<string>();
                var bundleName = subDir.Name;

                if (skipPrefabs.Contains(Utilities.CreateAssetBundleName(bundleName)))
                {
                    continue;
                }

                DoCollectAssetsInFolder(resourcePaths, subDir.FullName);
                var builder = Utilities.CreateNewAssetBundleBuild(bundleName, resourcePaths.ToArray());
                tasks.Add(new MetacityBundle
                {
                    BundleBuild = builder,
                    BundleType = MetacityBundleType.Prefab,
                    NeedUpload = needUpload
                });
            }
        }
    }
}