import format from 'template-format';

function getWatchUrl(scene) {
	if (scene.url) {
		return scene.url;
	}

	if (scene.channel && (scene.channel.isIndependent || scene.channel.type === 'network')) {
		return scene.channel.url;
	}

	if (scene.network) {
		return scene.network.url;
	}

	return null;
}

export function getAffiliateSceneUrl(scene) {
	const watchUrl = getWatchUrl(scene);

	if (!watchUrl) {
		return null;
	}

	if (!scene.affiliate) {
		return watchUrl;
	}

	const affiliateUrl = scene.affiliate.parameters.replaceScene?.hostname === new URL(watchUrl).hostname
		? scene.affiliate.parameters.replaceScene.url
		: scene.affiliate.url;

	if (scene.affiliate.parameters.dynamicScene) {
		const scenePath = new URL(watchUrl).pathname;

		return format(scene.affiliate.parameters.dynamicScene, {
			scenePath: scene.affiliate.parameters.prefixSlash
				? scenePath
				: scenePath.replace(/^\//, ''),
			entryId: scene.entryId,
		});
	}

	if (affiliateUrl?.includes('/track')
		&& scene.affiliate.parameters.scene !== false
		&& (!scene.channel.isIndependent || scene.channel.id === scene.affiliate.entityId)) { // standard NATS redirect
		const { pathname, search } = new URL(watchUrl);

		return `${affiliateUrl}${pathname.replace(/^\/trial/, '')}${search}`; // replace needed for Jules Jordan, verify behavior on other sites
	}

	if (scene.affiliate.parameters.query) { // used by e.g. Bang
		const newParams = new URLSearchParams({
			...Object.fromEntries(new URL(watchUrl).searchParams),
			...Object.fromEntries(new URLSearchParams(scene.affiliate.parameters.query)),
		});

		return `${watchUrl}?${newParams.toString()}`;
	}

	return watchUrl;
}

export function getAffiliateEntityUrl(entity) {
	if (!entity.affiliate) {
		return entity.url;
	}

	const affiliateUrl = entity.affiliate.parameters.replaceEntity?.hostname === new URL(entity.url).hostname
		? entity.affiliate.parameters.replaceEntity.url
		: entity.affiliate.url;

	if (entity.id === entity.affiliate.entityId || entity.url === entity.parent?.url) {
		return affiliateUrl;
	}

	if (entity.type === 'network' || entity.isIndependent) {
		return entity.url;
	}

	// channel has its own domain
	if (new URL(entity.url).pathname === '/' && entity.url !== entity.parent?.url) {
		return entity.url;
	}

	if (entity.affiliate.parameters.dynamicEntity) {
		const entityPath = new URL(entity.url).pathname;

		return format(entity.affiliate.parameters.dynamicEntity, {
			entityPath: entity.affiliate.parameters.prefixSlash
				? entityPath
				: entityPath.replace(/^\//, ''),
		});
	}

	if (affiliateUrl?.includes('/track')
		&& entity.affiliate.parameters.channel !== false) {
		const { pathname, search } = new URL(entity.url);

		return `${affiliateUrl}${pathname.replace(/^\/trial/, '')}${search}`; // replace needed for Jules Jordan, verify behavior on other sites
	}

	if (entity.affiliate.parameters.query) { // used by e.g. Bang
		const newParams = new URLSearchParams({
			...Object.fromEntries(new URL(entity.url).searchParams),
			...Object.fromEntries(new URLSearchParams(entity.affiliate.parameters.query)),
		});

		return `${entity.url}?${newParams.toString()}`;
	}

	return entity.url;
}