import { InstantiableCanonical } from './InstantiableCanonical.ts'
import { CanonicalDefinition } from './Canonical.ts'
import Controller from '../http/Controller.ts'
import { Unit } from '../lifecycle/decorators.ts'

/**
 * Canonical method which loads controllers, and returns an instance of the controller.
 * @extends InstantiableCanonical
 */
@Unit()
export default class Controllers extends InstantiableCanonical<Controller> {
    protected base_path = './app/http/controllers'
    protected canonical_item = 'controller'
    protected suffix = '.controller.ts'

    public async init_canonical_item(def: CanonicalDefinition) {
        const item = await super.init_canonical_item(def)
        if ( !(item instanceof Controller) ) {
            throw new TypeError(`Invalid controller definition: ${def.original_name}. Controllers must extend from Daton's base Controller class.`)
        }

        return item
    }
}