import {Model} from '../model/Model'
import {Instantiable, Singleton, Inject} from '../../di'
import {CommandLine} from '../../cli'
import {templateModel} from '../template/model'
import {CanonicalStatic} from '../../service/CanonicalStatic'
import {CanonicalDefinition} from '../../service/Canonical'

/**
 * Canonical unit responsible for loading the model classes defined by the application.
 */
@Singleton()
export class Models extends CanonicalStatic<Model<any>, Instantiable<Model<any>>> {
    @Inject()
    protected readonly cli!: CommandLine

    protected appPath = ['models']

    protected canonicalItem = 'model'

    protected suffix = '.model'

    public async up(): Promise<void> {
        await super.up()
        this.cli.registerTemplate(templateModel)
    }

    public async initCanonicalItem(definition: CanonicalDefinition): Promise<Instantiable<Model<any>>> {
        const item = await super.initCanonicalItem(definition)
        if ( !(item.prototype instanceof Model) ) {
            throw new TypeError(`Invalid controller definition: ${definition.originalName}. Models must extend from @extollo/orm.Model.`)
        }

        return item
    }
}