import { DescriptorBuilder } from "./DescriptorBuilder";
import { ConfigurableKeys, ContainerServices, RegistrationBuildersMap, ExtractRequired, IContainerBuilder } from "./interfaces";
import { ServiceContainer } from "./interfaces";
import { argumentNotNull, each, isKey } from "./traits";

export class FluentConfiguration<S, Y extends ConfigurableKeys<S> = ConfigurableKeys<S>> {

    private _builders: Partial<RegistrationBuildersMap<S>> = {};

    /** Adds a declaration of the services to the current config.
     * 
     * @template D The map of the services
     * @returns self
     */
    declare<D extends Pick<S, keyof D & keyof S>>(): FluentConfiguration<S & D, Y | ConfigurableKeys<D>> {
        return this as FluentConfiguration<S & D, Y | ConfigurableKeys<D>>;
    }

    /** Adds compile-time information about the already provided services
     * 
     * @template P The map of the provided services
     * @returns self
     */
    provided<P extends Pick<S, keyof P & keyof S>>(): FluentConfiguration<S & P, Exclude<Y, keyof P>> {
        return this as FluentConfiguration<S & P, Exclude<Y, keyof P>>;
    }

    /** Register the service.
     * 
     * @param name The name of the service
     * @param builder The service builder
     * @returns self
     */
    register<K extends Y>(name: K, builder: RegistrationBuildersMap<S>[K]): FluentConfiguration<S, Exclude<Y, K>>;
    /** Registers the collection of services
     * @param config The collection of services to register.
     * @returns self
     */
    register<K extends Y>(config: RegistrationBuildersMap<S, K>): FluentConfiguration<S, Exclude<Y, K>>;
    register<K extends Y>(nameOrConfig: K | RegistrationBuildersMap<S, K>, builder?: RegistrationBuildersMap<S>[K]) {
        if (isKey(nameOrConfig)) {
            argumentNotNull(builder, "builder");
            this._builders[nameOrConfig] = builder;
        } else {
            each(nameOrConfig, (v, k) => this.register(k, v));
        }

        return this as FluentConfiguration<S, Exclude<Y, K>>;
    }

    /**
     * This method is used to enable a compile time check of the configuration.
     * If there are not configured services in the configuration the compiler
     * will trigger the error.
     * 
     * @param missing Empty object literal should always be specified.
     * @returns self
     */
    // eslint-disable-next-line @typescript-eslint/no-unused-vars
    done<M extends ExtractRequired<S,Y>>(missing: M) {
        return this;
    }

    configure<T extends IContainerBuilder<S>>(builder: T) {
        each(this._builders, (v, k) => {
            v(builder.createServiceBuilder(k));
        });
        builder.build() as T & ServiceContainer<S>;
    }

}