package api

import (
	"github.com/go-chi/chi/v5"

	"git.avsdev.uk/Go/job-search/internal/events"
	"git.avsdev.uk/Go/job-search/internal/store"
)

// API is the REST API, mounted under /api. Create it with New, giving it what
// its resources need as options, and register its routes with Routes. The
// server applies the API's middleware (CSRF, NoStore, RequireJSON, rate
// limits); the API only registers handlers.
type API struct {
	store  *store.Store // nil: no opportunity routes
	events *events.Bus  // nil: nothing is published
}

// Option configures the API.
type Option func(*API)

// WithStore makes the API serve the opportunities in opportunityStore under
// /opportunities, and their classifications under /classifications. Without
// it there are neither.
func WithStore(opportunityStore *store.Store) Option {
	return func(a *API) {
		a.store = opportunityStore
	}
}

// WithEvents makes the API publish its changes to bus, such as an
// events.OpportunityMarksUpdated event when an opportunity's marks change.
func WithEvents(bus *events.Bus) Option {
	return func(a *API) {
		a.events = bus
	}
}

// New returns the API.
func New(opts ...Option) *API {
	api := &API{}
	for _, option := range opts {
		option(api)
	}

	return api
}

// Routes registers the API's routes on router (mounted under /api): its
// description (see openapi.go), and the opportunities and classifications if
// it has a store.
func (a *API) Routes(router chi.Router) {
	docsRoutes(router)
	if a.store != nil {
		newOpportunityRoutes(a.store, a.events).Routes(router)
		newClassificationRoutes(a.store).Routes(router)
	}
}