import { ModuleMetadata, Type } from '@nestjs/common/interfaces'

/**
 * Options that ultimately need to be provided to create a MongoDB connection
 */
export interface MongoModuleOptions {
    connectionName?: string
    uri: string
    dbName: string
    clientOptions?: any
}

export interface MongoOptionsFactory {
    createMongoOptions(): Promise<MongoModuleOptions> | MongoModuleOptions
}

/**
 * Options available when creating the module asynchrously.  You should use only one of the
 * useExisting, useClass, or useFactory options for creation.
 */
export interface MongoModuleAsyncOptions extends Pick<ModuleMetadata, 'imports'> {
    /** A unique name for the container.  If not specified, a default one will be used. */
    containerName?: string

    /** Reuse an injectable factory class created in another module. */
    useExisting?: Type<MongoOptionsFactory>

    /**
     * Use an injectable factory class to populate the module options, such as URI and database name.
     */
    useClass?: Type<MongoOptionsFactory>

    /**
     * A factory function that will populate the module options, such as URI and database name.
     */
    useFactory?: (...args: any[]) => Promise<MongoModuleOptions> | MongoModuleOptions

    /**
     * Inject any dependencies required by the Mongo module, such as a configuration service
     * that supplies the URI and database name
     */
    inject?: any[]
}