import type { ServiceConfig } from '$lib/config';
import type { ServiceHandler } from '../service';

interface Status {
	warnings: number;
	errors: number;
}

function buildStatus(statuses: any[]): Status {
	let warnings = 0;
	let errors = 0;
	for (const status of statuses) {
		switch (status.type) {
			case 'warning':
				warnings += 1;
				break;
			case 'error':
				errors += 1;
				break;
		}
	}
	return { warnings, errors };
}

interface Queue {
	nextDate?: Date;
	total: number;
}
function recordEstimatedCompletionTime(record: any): number {
	if (record.estimatedCompletionTime == undefined) {
		return Infinity;
	}
	return new Date(record.estimatedCompletionTime).getTime();
}

function buildQueue(queue: any): Queue {
	if (queue?.records?.length === 0) {
		return { total: 0 };
	}
	let nextTime: number = recordEstimatedCompletionTime(queue.records[0]);
	for (let i = 1; i < queue.records.length; i++) {
		const recordTime = recordEstimatedCompletionTime(queue.records[i]);
		if (recordTime < nextTime) {
			nextTime = recordTime;
		}
	}

	return {
		total: queue.records.length,
		nextDate: nextTime != Infinity ? new Date(nextTime) : undefined
	};
}

export const handle: ServiceHandler = async (config: ServiceConfig) => {
	const res = {
		logo: 'https://cdn.rawgit.com/Sonarr/Sonarr/develop/Logo/Sonarr.svg',
		subtitle: 'TV Show tracker'
	};

	const params = '?apikey=' + config.api_key;

	const requests = [
		fetch(config.url + '/api/v3/health' + params),
		fetch(config.url + '/api/v3/queue' + params + '&includeUnknownSeriesItems=true')
	];

	const [health, queue] = await Promise.allSettled(requests);
	res.status = 'online';

	if (health.status != 'fulfilled') {
		console.warn("Could not fetch '" + config.url + "' status: " + health.value);
		res.status = 'offline';
	} else if (health.value.ok == true) {
		res.health = buildStatus(await health.value.json());
	}

	if (queue.status != 'fulfilled') {
		console.warn("Could not fetch '" + config.url + "' queue: " + queue.value);
		res.status = 'offline';
	} else if (queue.value.ok == true) {
		res.queue = buildQueue(await queue.value.json());
	}

	return res;
};