import {Singleton, Inject} from '../../di'
import {CommandLine} from '../../cli'
import {InjectRequestLocale} from '../modules/InjectRequestLocale'
import {templateLocale} from '../template/locale'
import {Unit} from '../../lifecycle/Unit'
import {HTTPKernel} from '../../http/kernel/HTTPKernel'
import {Config} from '../../service/Config'
import {Logging} from '../../service/Logging'

/**
 * Application unit to register @extollo/i18n resources.
 */
@Singleton()
export class Internationalization extends Unit {
    @Inject()
    protected readonly kernel!: HTTPKernel

    @Inject()
    protected readonly config!: Config

    @Inject()
    protected readonly logging!: Logging

    @Inject()
    protected readonly cli!: CommandLine

    /**
     * Registers the locale template and middleware, if enabled by config.
     *
     * You can set the "locale.enable" config property to `false` to disable
     * the InjectRequestLocale HTTP kernel module.
     */
    up(): void {
        this.logging.debug(`Registering locale template with CLI...`)
        this.cli.registerTemplate(templateLocale)

        if ( this.config.get('locale.enable', true) ) {
            this.kernel.register(InjectRequestLocale).before()
        } else {
            this.logging.warn(`@extollo/i18n is registered, but disabled by config. Localization will not be done per-request.`)
        }
    }
}