package classes

import (
	"git.golem15.com/golem15/sm-quizzes-plugin/graders"
	"git.golem15.com/golem15/summercms/modules/backpack"
	"git.golem15.com/golem15/summercms/modules/conga"
	"gorm.io/gorm"
)

// ForApp builds the service the application runs on db: the scoring and
// test grace from its config, the grader registry golem15.quizzes
// published at boot, its event bus and its job queue. Each part that is
// missing stays nil and the service works without it (no graders, no
// events, no jobs). A nil app gives a service with the default grace only.
func ForApp(app *backpack.App, db *gorm.DB) *Service {
	if app == nil {
		return &Service{DB: db, Grace: DefaultTestGrace}
	}
	s := &Service{
		DB:      db,
		Scoring: ScoringConfigFrom(app.Config),
		Grace:   TestGraceFrom(app.Config),
		Events:  app.Events,
	}
	if reg, ok := app.Lookup[*graders.Registry](); ok {
		s.Graders = reg
	}
	if m, err := conga.From(app); err == nil && m != nil {
		s.Jobs = m
	}
	return s
}