/* eslint-disable no-await-in-loop */
import db from "external/mongo/db";
import CreateLogCtx from "lib/logger/logger";
import fetch from "node-fetch";
import { ChartDocument } from "tachi-common";
import { CreateFolderID } from "utils/folder";

// this seems to be all we care about
interface TableJSONDoc {
	md5: string;
	title?: string;
	level: string;
}

const logger = CreateLogCtx(__filename);

async function ImportTableLevels(tableJSON: TableJSONDoc[], prefix: string) {
	let failures = 0;
	let success = 0;
	const total = tableJSON.length;

	for (const td of tableJSON) {
		const chart = (await db.charts.bms.findOne({ "data.hashMD5": td.md5 })) as ChartDocument<
			"bms:7K" | "bms:14K"
		>;

		if (!chart) {
			logger.warn(
				`No chart exists in table for ${td.md5} Possible title: ${td.title} ${prefix}${td.level}`
			);
			failures++;
			continue;
		}

		const tableFolders = chart.data.tableFolders.filter((e) => e.table !== prefix);

		tableFolders.push({ table: prefix, level: td.level.toString() });

		await db.charts.bms.update(
			{
				chartID: chart.chartID,
			},
			{
				$set: {
					"data.tableFolders": tableFolders,
				},
			}
		);

		success++;
	}

	logger.info(`Finished updating table ${prefix}.`);
	logger.info(`${success} Success | ${failures} Failures | ${total} Total.`);
}

export interface BMSTablesDataset {
	url: string;
	name: string;
	description: string;
	humanisedPrefix: string;
	prefix: string;
	playtype: "7K" | "14K";
}

interface BMSTableChart {
	title: string;
	artist: string;
	url: string;
	url_diff: string;
	md5: string;
	sha256: string;
	level: string;
}

const RETRY_COUNT = 3;

export async function UpdateTable(table: BMSTablesDataset) {
	const res = await fetch(table.url);

	const statusCode = res.status;

	let retries = 0;

	// instead of using res.json() we have to use res.text() here
	// so we have proper logging when some of these bms urls
	// spontaneously return HTML.
	let tableJSON: BMSTableChart[] | undefined;

	// We need to have a retry counter because some of the bms tables
	// randomly return useless html for no reason.

	// i hate bms.
	while (!tableJSON) {
		let text;
		try {
			text = await res.text();
			tableJSON = JSON.parse(text);
		} catch (err) {
			logger.error(`Failed to fetch ${table.url}`, { err, res, statusCode, text });
			retries++;

			if (retries > RETRY_COUNT) {
				logger.error(`SKIPPING TABLE!`);
				return;
			}
			logger.info(`Retrying ${table.url}.`);
		}
	}

	const tableID = `bms-${table.playtype}-${table.humanisedPrefix}`;

	const folderIDs = [];
	const levels = [...new Set(tableJSON.map((e) => e.level))];

	for (const level of levels) {
		const query = {
			"data¬tableFolders": {
				table: table.prefix,
				// just incase some dude tries numbers
				level: level.toString(),
			},
		};

		const folderID = CreateFolderID(query, "bms", table.playtype);

		folderIDs.push(folderID);

		const exists = await db.folders.findOne({
			folderID,
		});

		if (exists) {
			continue;
		}

		await db.folders.insert({
			title: `${table.prefix}${level}`,
			inactive: false,
			folderID,
			game: "bms",
			playtype: table.playtype,
			type: "charts",
			data: query,
			searchTerms: [`${table.name} ${level}`],
		});

		logger.info(`Inserted new table ${table.prefix}${level}.`);
	}

	await db.tables.update(
		{ tableID },
		{
			$set: {
				tableID,
				game: "bms",
				playtype: table.playtype,
				folders: folderIDs,
				title: table.name,
				description: table.description,
				inactive: false,
			},
		},
		{
			upsert: true,
		}
	);

	logger.info(`Bumped table ${table.name}.`);

	logger.info(`Bumping levels...`);
	await ImportTableLevels(tableJSON, table.prefix);
	logger.info(`Levels bumped.`);
}