using FileShare_Common.Core;
using FileShare_Services.Core;

namespace FileShare_Services.Services.FileLibrary
{
    public sealed class FileLibraryEndpointService(IFileLibraryService fileLibrary) : IFileLibraryEndpointService
    {
        public async Task<IApiResponse> GetDrivesAsync(ServiceEndpointContext ctx)
        {
            return ResponseHelper.Ok(await fileLibrary.GetDrivesAsync());
        }

        public async Task<IApiResponse> GetDirectoriesAsync(DirectoryQueryRequest request)
        {
            return ResponseHelper.Ok(await fileLibrary.GetDirectoriesAsync(request.Path));
        }

        public async Task<IApiResponse> GetRootsAsync(ServiceEndpointContext ctx)
        {
            return ResponseHelper.Ok(await fileLibrary.GetRootsAsync());
        }

        public async Task<IApiResponse> AddRootAsync(AddLibraryRootRequest request)
        {
            return ResponseHelper.Ok(await fileLibrary.AddRootAsync(request), "文件库目录已添加并完成扫描。");
        }

        public async Task<IApiResponse> SetRootEnabledAsync(UpdateLibraryRootRequest request)
        {
            return ResponseHelper.Ok(await fileLibrary.SetRootEnabledAsync(request), "文件库目录状态已更新。");
        }

        public async Task<IApiResponse> DeleteRootAsync(DeleteLibraryRootRequest request)
        {
            await fileLibrary.DeleteRootAsync(request);
            return ResponseHelper.Succeed("文件库目录已删除。");
        }

        public async Task<IApiResponse> ScanRootAsync(ScanLibraryRootRequest request)
        {
            return ResponseHelper.Ok(await fileLibrary.ScanRootAsync(request.Id), "文件库目录扫描完成。");
        }

        public async Task<IApiResponse> SearchFilesAsync(SearchFilesRequest request)
        {
            return await fileLibrary.SearchFilesAsync(request);
        }

        public async Task<IApiResponse> GetFileAsync(FileQueryRequest request)
        {
            ValidateFileId(request.Id);
            var file = await fileLibrary.GetFileAsync(request.Id);
            return file is null
                ? ResponseHelper.Failure(404, "文件不存在或尚未扫描入库。")
                : ResponseHelper.Ok(file);
        }

        public async Task<IApiResponse> GetTextPreviewAsync(FileQueryRequest request)
        {
            ValidateFileId(request.Id);
            var preview = await fileLibrary.GetTextPreviewAsync(request.Id);
            return preview is null
                ? ResponseHelper.Failure(404, "文本文件不存在或无法预览。")
                : ResponseHelper.Ok(preview);
        }

        public async Task<IApiResponse> BrowseDirectoryAsync(BrowseDirectoryRequest request)
        {
            if (request.RootId <= 0)
                return ResponseHelper.Failure(400, "rootId 参数无效。");

            var result = await fileLibrary.BrowseDirectoryAsync(request);
            return ResponseHelper.Ok(result);
        }

        private static void ValidateFileId(int id)
        {
            if (id > 0)
            {
                return;
            }

            throw new ArgumentException("id 参数无效。");
        }
    }
}