import { Injectable, Logger } from "@nestjs/common";
import { Cron, CronExpression } from "@nestjs/schedule";
import { ContentsRepository } from "../../contents/repositories/contents.repository";
import { ReportsRepository } from "../../reports/repositories/reports.repository";
import { SessionsRepository } from "../../sessions/repositories/sessions.repository";
import { UsersRepository } from "../../users/repositories/users.repository";

@Injectable()
export class PurgeService {
	private readonly logger = new Logger(PurgeService.name);

	constructor(
		private readonly sessionsRepository: SessionsRepository,
		private readonly reportsRepository: ReportsRepository,
		private readonly usersRepository: UsersRepository,
		private readonly contentsRepository: ContentsRepository,
	) {}

	// Toutes les nuits à minuit
	@Cron(CronExpression.EVERY_DAY_AT_MIDNIGHT)
	async purgeExpiredData() {
		this.logger.log("Starting automatic data purge...");

		try {
			const now = new Date();

			// 1. Purge des sessions expirées
			const deletedSessions = await this.sessionsRepository.purgeExpired(now);
			this.logger.log(`Purged ${deletedSessions.length} expired sessions.`);

			// 2. Purge des signalements obsolètes
			const deletedReports = await this.reportsRepository.purgeObsolete(now);
			this.logger.log(`Purged ${deletedReports.length} obsolete reports.`);

			// 3. Purge des utilisateurs supprimés (Soft Delete > 30 jours)
			const thirtyDaysAgo = new Date();
			thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);

			const deletedUsers = await this.usersRepository.purgeDeleted(thirtyDaysAgo);
			this.logger.log(
				`Purged ${deletedUsers.length} users marked for deletion more than 30 days ago.`,
			);

			// 4. Purge des contenus supprimés (Soft Delete > 30 jours)
			const deletedContents =
				await this.contentsRepository.purgeSoftDeleted(thirtyDaysAgo);
			this.logger.log(
				`Purged ${deletedContents.length} contents marked for deletion more than 30 days ago.`,
			);
		} catch (error) {
			this.logger.error("Error during data purge", error);
		}
	}
}