// TODO: this file is located in the client src folder because
// otherwise, Create React App will refuse to compile it.
// Putting it in the server folder or in its own folder makes more sense.

// This file represents the API interface for Mudbase's back-end.
// Each endpoint is described by its endpoint address,
// a request structure, a response structure and
// a checking function which determines request validity.

// Query for songs.
export const QuerySongsEndpoint = '/song/query';
export interface QuerySongsRequest {}
export interface QuerySongsResponse {
    ids: Number[]
}
export function checkQuerySongsRequest(req:any): boolean {
    return true;
}

// Get song details.
export const SongDetailsEndpoint = '/song/details';
export interface SongDetailsRequest {
    id: Number
}
export interface SongDetailsResponse {
    title: String,
    artistIds: Number[],
    albumIds: Number[],
}
export function checkSongDetailsRequest(req:any): boolean {
    return "id" in req;
}

// Query for artists.
export const QueryArtistsEndpoint = '/artist/query';
export interface QueryArtistsRequest {}
export interface QueryArtistsResponse {
    ids: Number[]
}
export function checkQueryArtistsRequest(req:any): boolean {
    return true;
}

// Get artist details.
export const ArtistDetailsEndpoint = '/artist/details';
export interface ArtistDetailsRequest {
    id: Number
}
export interface ArtistDetailsResponse {
    name: String
}
export function checkArtistDetailsRequest(req:any): boolean {
    return "id" in req;
}

// Create a new song.
export const CreateSongEndpoint = '/song/create';
export interface CreateSongRequest {
    title: String;
    artistIds?: Number[];
    albumIds?: Number[];
}
export interface CreateSongResponse {
    id: Number;
}
export function checkCreateSongRequest(req:any): boolean {
    return "body" in req &&
    "title" in req.body;
}

// Modify an existing song.
export const ModifySongEndpoint = '/song/modify';
export interface ModifySongRequest extends CreateSongRequest {
    id: Number;
}
export interface ModifySongResponse {}
export function checkModifySongRequest(req:any): boolean {
    return true;
}

// Create a new artist.
export const CreateArtistEndpoint = '/artist/create';
export interface CreateArtistRequest {
    name: String;
    songIds?: Number[];
    albumIds?: Number[];
}
export interface CreateArtistResponse {
    id: Number;
}
export function checkCreateArtistRequest(req:any): boolean {
    return "body" in req &&
    "name" in req.body;
}

// Modify an existing artist.
export const ModifyArtistEndpoint = '/artist/modify';
export interface ModifyArtistRequest extends CreateArtistRequest {
    id: Number;
}
export interface ModifyArtistResponse {}
export function checkModifyArtistRequest(req:any): boolean {
    return true;
}