import { Client, queryStore, type OperationResult } from '@urql/svelte';
import { isError } from './Utils';
import * as gql from './graphql';

function handleResult<D, T>(result: OperationResult<D>): Promise<T> {
	return new Promise((resolve, reject) => {
		if (result.error) {
			return reject(`${result.error.name}: ${result.error.message}`);
		}

		if (!result.data) {
			return reject('Query resolved, but result contains no data.');
		}

		const data = Object.values<T>(result.data)[0];

		if (isError(data)) {
			reject(data.message);
		} else {
			resolve(data);
		}

		reject('This should not happen.');
	});
}

export function comicTagList(client: Client, args?: gql.ComicTagListQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ComicTagListDocument,
		context: {
			additionalTypenames: ['Namespace', 'Tag']
		},
		variables: args
	});
}

export function artistList(client: Client) {
	return queryStore({
		client: client,
		query: gql.ArtistListDocument,
		context: {
			additionalTypenames: ['Artist']
		}
	});
}

export function characterList(client: Client) {
	return queryStore({
		client: client,
		query: gql.CharacterListDocument,
		context: {
			additionalTypenames: ['Character']
		}
	});
}

export function circleList(client: Client) {
	return queryStore({
		client: client,
		query: gql.CircleListDocument,
		context: {
			additionalTypenames: ['Circle']
		}
	});
}

export function worldList(client: Client) {
	return queryStore({
		client: client,
		query: gql.WorldListDocument,
		context: {
			additionalTypenames: ['World']
		}
	});
}

export function namespaceList(client: Client) {
	return queryStore({
		client: client,
		query: gql.NamespaceListDocument,
		context: {
			additionalTypenames: ['Namespace']
		}
	});
}

export function comicScrapersQuery(client: Client, args: gql.ComicScrapersQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ComicScrapersDocument,
		variables: args,
		context: {
			additionalTypenames: ['Comic']
		}
	});
}

export async function scrapeComic(client: Client, args: gql.ScrapeComicQueryVariables) {
	return await client
		.query(gql.ScrapeComicDocument, args, { additionalTypenames: ['Comic'] })
		.toPromise();
}

export function archiveQuery(client: Client, args: gql.ArchiveQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ArchiveDocument,
		variables: args,
		context: { additionalTypenames: ['Archive'] }
	});
}

export function archivesQuery(client: Client, args: gql.ArchivesQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ArchivesDocument,
		variables: args,
		context: { additionalTypenames: ['Archive'] }
	});
}

export function artistsQuery(client: Client, args?: gql.ArtistsQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ArtistsDocument,
		variables: args,
		context: { additionalTypenames: ['Artist'] }
	});
}

export function charactersQuery(client: Client, args?: gql.CharactersQueryVariables) {
	return queryStore({
		client: client,
		query: gql.CharactersDocument,
		variables: args,
		context: { additionalTypenames: ['Character'] }
	});
}

export function circlesQuery(client: Client, args?: gql.CirclesQueryVariables) {
	return queryStore({
		client: client,
		query: gql.CirclesDocument,
		variables: args,
		context: { additionalTypenames: ['Circle'] }
	});
}

export function comicQuery(client: Client, args: gql.ComicQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ComicDocument,
		variables: args,
		context: { additionalTypenames: ['Comic'] }
	});
}

export function comicsQuery(client: Client, args?: gql.ComicsQueryVariables) {
	return queryStore({
		client: client,
		query: gql.ComicsDocument,
		variables: args,
		context: { additionalTypenames: ['Comic'] }
	});
}

export function namespacesQuery(client: Client, args?: gql.NamespacesQueryVariables) {
	return queryStore({
		client: client,
		query: gql.NamespacesDocument,
		variables: args,
		context: { additionalTypenames: ['Namespace'] }
	});
}

export function tagsQuery(client: Client, args?: gql.TagsQueryVariables) {
	return queryStore({
		client: client,
		query: gql.TagsDocument,
		variables: args,
		context: { additionalTypenames: ['Tag'] }
	});
}

export function worldsQuery(client: Client, args?: gql.WorldsQueryVariables) {
	return queryStore({
		client: client,
		query: gql.WorldsDocument,
		variables: args,
		context: { additionalTypenames: ['World'] }
	});
}

export function frontpageQuery(client: Client) {
	return queryStore({
		client: client,
		query: gql.FrontpageDocument,
		requestPolicy: 'network-only'
	});
}

export function fetchArtist(client: Client, id: number) {
	return client
		.query(gql.ArtistDocument, { id }, { requestPolicy: 'cache-and-network' })
		.toPromise()
		.then(handleResult<gql.ArtistQuery, gql.Artist>);
}

export function fetchCharacter(client: Client, id: number) {
	return client
		.query(gql.CharacterDocument, { id }, { requestPolicy: 'cache-and-network' })
		.toPromise()
		.then(handleResult<gql.CharacterQuery, gql.Character>);
}

export function fetchCircle(client: Client, id: number) {
	return client
		.query(gql.CircleDocument, { id }, { requestPolicy: 'cache-and-network' })
		.toPromise()
		.then(handleResult<gql.CircleQuery, gql.Circle>);
}

export function fetchNamespace(client: Client, id: number) {
	return client
		.query(gql.NamespaceDocument, { id }, { requestPolicy: 'cache-and-network' })
		.toPromise()
		.then(handleResult<gql.NamespaceQuery, gql.Namespace>);
}

export function fetchTag(client: Client, id: number) {
	return client
		.query(gql.TagDocument, { id }, { requestPolicy: 'cache-and-network' })
		.toPromise()
		.then(handleResult<gql.TagQuery, gql.FullTag>);
}

export function fetchWorld(client: Client, id: number) {
	return client
		.query(gql.WorldDocument, { id }, { requestPolicy: 'cache-and-network' })
		.toPromise()
		.then(handleResult<gql.WorldQuery, gql.World>);
}