package watchdog

import (
	"orbits-server/internal/server/bootstrap"
	"orbits-server/internal/server/database"
	"os"
	"path/filepath"

	"gorm.io/gorm"
)

func reconcile(fs map[string]struct{}, db map[string]database.File) Result {
	r := Result{}

	for path := range fs {
		if _, ok := db[path]; !ok {
			r.FSOrphans = append(r.FSOrphans, path)
		}
	}

	for path, f := range db {
		if _, ok := fs[path]; !ok {
			r.DBOrphans = append(r.DBOrphans, f)
		}
	}

	return r
}

func scanFS(env bootstrap.Environment) (map[string]struct{}, error) {
	fsFiles, err := os.ReadDir(env.ContentDirectory)
	if err != nil {
		return nil, err
	}

	res := make(map[string]struct{})
	for _, f := range fsFiles {
		full := filepath.Join(env.ContentDirectory, f.Name())
		res[full] = struct{}{}
	}

	return res, nil
}

func scanDB(db *gorm.DB) (map[string]database.File, error) {
	files, err := database.ListFiles(db)
	if err != nil {
		return nil, err
	}

	res := make(map[string]database.File)
	for _, f := range files {
		res[f.FilePath] = f
	}

	return res, nil
}