package drive

import (
	"context"
	"io"
	"strings"

	"github.com/ultisuite/ulti-backend/internal/api/paginate"
	"github.com/ultisuite/ulti-backend/internal/api/query"
	"github.com/ultisuite/ulti-backend/internal/nextcloud"
)

type Service struct {
	nc *nextcloud.Client
}

func NewService(nc *nextcloud.Client) *Service {
	return &Service{nc: nc}
}

type FilesList struct {
	Files      []nextcloud.FileInfo `json:"files"`
	Pagination query.PaginationMeta `json:"pagination,omitempty"`
}

func (s *Service) ListFiles(ctx context.Context, userID, path string, params query.ListParams) (FilesList, error) {
	if path == "" {
		path = "/"
	}
	files, err := s.nc.ListFiles(ctx, userID, path)
	if err != nil {
		return FilesList{}, err
	}
	filtered := filterFiles(files, params.Q)
	page, total := paginate.Slice(filtered, params.Offset(), params.Limit())
	return FilesList{
		Files:      page,
		Pagination: params.Meta(&total),
	}, nil
}

func (s *Service) Upload(ctx context.Context, userID, path string, body io.Reader, contentType string) error {
	return s.nc.Upload(ctx, userID, path, body, contentType)
}

func (s *Service) Download(ctx context.Context, userID, path string) (io.ReadCloser, string, error) {
	return s.nc.Download(ctx, userID, path)
}

func (s *Service) Delete(ctx context.Context, userID, path string) error {
	return s.nc.Delete(ctx, userID, path)
}

func (s *Service) CreateFolder(ctx context.Context, userID, path string) error {
	return s.nc.CreateFolder(ctx, userID, path)
}

func (s *Service) Move(ctx context.Context, userID, source, destination string) error {
	return s.nc.Move(ctx, userID, source, destination)
}

func (s *Service) CreateShare(ctx context.Context, userID, path string, shareType, permissions int) (*nextcloud.ShareInfo, error) {
	return s.nc.CreateShare(ctx, userID, path, shareType, permissions)
}

func filterFiles(files []nextcloud.FileInfo, q string) []nextcloud.FileInfo {
	q = strings.ToLower(strings.TrimSpace(q))
	if q == "" {
		return files
	}
	out := make([]nextcloud.FileInfo, 0, len(files))
	for _, f := range files {
		if strings.Contains(strings.ToLower(f.Name), q) ||
			strings.Contains(strings.ToLower(f.Path), q) {
			out = append(out, f)
		}
	}
	return out
}