import {CanonicalDefinition} from '../../lib/src/unit/Canonical.ts'
import {Model} from './model/Model.ts'
import {Unit} from '../../lib/src/lifecycle/decorators.ts'
import {StaticCanonical} from '../../lib/src/unit/StaticCanonical.ts'

/**
 * Canonical unit which loads ORM models from their directory.
 * @extends StaticCanonical
 */
@Unit()
export default class ModelsUnit extends StaticCanonical<Model<any>, typeof Model> {
    protected base_path = './app/models'
    protected canonical_item = 'model'
    protected suffix = '.model.ts'

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

        return item
    }
}