import { queueLogger } from "../../logger.js";
import * as Acct from "@/misc/acct.js";
import { resolveUser } from "@/remote/resolve-user.js";
import { downloadTextFile } from "@/misc/download-text-file.js";
import { isSelfHost, toPuny } from "@/misc/convert-host.js";
import { Users, DriveFiles, Blockings } from "@/models/index.js";
import type { DbUserImportJobData } from "@/queue/types.js";
import block from "@/services/blocking/create.js";
import { IsNull } from "typeorm";
import { Job } from "bullmq";

const logger = queueLogger.createSubLogger("import-blocking");

export async function importBlocking(
	job: Job<DbUserImportJobData>,
): Promise<string> {
	logger.info(`Importing blocking of ${job.data.user.id} ...`);

	const user = await Users.findOneBy({ id: job.data.user.id });
	if (user == null) {
		return "skip: User not found";
	}

	const file = await DriveFiles.findOneBy({
		id: job.data.fileId,
	});
	if (file == null) {
		return "skip: File not found";
	}

	const csv = await downloadTextFile(file.url);

	let linenum = 0;

	for (const line of csv.trim().split("\n")) {
		linenum++;

		try {
			const acct = line.split(",")[0].trim();
			const { username, host } = Acct.parse(acct);

			let target = isSelfHost(host!)
				? await Users.findOneBy({
						host: IsNull(),
						usernameLower: username.toLowerCase(),
				  })
				: await Users.findOneBy({
						host: toPuny(host!),
						usernameLower: username.toLowerCase(),
				  });

			if (host == null && target == null) continue;

			if (target == null) {
				target = await resolveUser(username, host);
			}

			if (target == null) {
				throw new Error(`cannot resolve user: @${username}@${host}`);
			}

			// skip myself
			if (target.id === job.data.user.id) continue;

			logger.info(`Block[${linenum}] ${target.id} ...`);

			await block(user, target);
		} catch (e) {
			logger.warn(`Error in line:${linenum} ${e}`);
		}
	}

	logger.succ("Imported");
	return "Success";
}
