package core

import (
	"path/filepath"

	"github.com/navidrome/navidrome/core/storage"
	"github.com/navidrome/navidrome/log"
	"github.com/navidrome/navidrome/model"
	"github.com/navidrome/navidrome/model/metadata"
)

type InspectOutput struct {
	File       string           `json:"file"`
	RawTags    model.RawTags    `json:"rawTags"`
	MappedTags *model.MediaFile `json:"mappedTags,omitempty"`
}

func Inspect(filePath string, lib model.Library, folderId string) (*InspectOutput, error) {
	path, file := filepath.Split(filePath)

	s, err := storage.For(path)
	if err != nil {
		return nil, err
	}

	fs, err := s.FS()
	if err != nil {
		return nil, err
	}

	tags, err := fs.ReadTags(file)
	if err != nil {
		return nil, err
	}

	tag, ok := tags[file]
	if !ok {
		log.Error("Could not get tags for path", "path", filePath)
		return nil, model.ErrNotFound
	}

	md := metadata.New(scannerPath(lib, filePath), tag)
	result := &InspectOutput{
		File:       filePath,
		RawTags:    tags[file].Tags,
		MappedTags: new(md.ToMediaFile(lib, folderId)),
	}

	return result, nil
}

// scannerPath returns the path the scanner uses for the file (relative to its library), so
// folder-based PIDs match the DB. Files outside the library keep their absolute path.
func scannerPath(lib model.Library, filePath string) string {
	absPath, err := filepath.Abs(filePath)
	if err != nil || lib.Path == "" {
		return filePath
	}
	return model.LibraryRelativePath(lib.Path, absPath)
}