import type { Media, MediaTitle } from './media';

interface SchedulePage {
	data: {
		Page: {
			media: {
				title: MediaTitle;
				synonyms: string[];
				id: number;
				idMal: number;
				episodes: number;
				nextAiringEpisode?: {
					episode: number;
					airingAt?: number;
				};
				coverImage: {
					extraLarge: string;
				};
			}[];
			pageInfo: {
				hasNextPage: boolean;
			};
		};
	};
}

const schedulePage = async (
	page: number,
	year: number,
	season: 'WINTER' | 'SPRING' | 'SUMMER' | 'FALL'
): Promise<SchedulePage> =>
	await (
		await fetch('https://graphql.anilist.co', {
			method: 'POST',
			headers: {
				'Content-Type': 'application/json',
				Accept: 'application/json'
			},
			body: JSON.stringify({
				query: `{
  Page(page: ${page}) {
    pageInfo {
      hasNextPage
    }
    media(season: ${season}, seasonYear: ${year}) {
      id idMal episodes synonyms
      title { english romaji native }
			nextAiringEpisode { episode airingAt }
      coverImage { extraLarge }
    }
  }
}`
			})
		})
	).json();

export const scheduleMediaListCollection = async (
	year: number,
	season: 'WINTER' | 'SPRING' | 'SUMMER' | 'FALL'
) => {
	const scheduledMedia = [];
	let page = 1;
	let currentPage = await schedulePage(page, year, season);

	for (const candidate of currentPage.data.Page.media) scheduledMedia.push(candidate);

	while (currentPage['data']['Page']['pageInfo']['hasNextPage']) {
		for (const candidate of currentPage.data.Page.media) scheduledMedia.push(candidate);

		page += 1;
		currentPage = await schedulePage(page, year, season);
	}

	return scheduledMedia as Partial<Media[]>;
};