import { Inject, Injectable } from '@nestjs/common';
import { v4 as uuid } from 'uuid';
import type { IActivity } from '@/core/activitypub/type.js';
import type { DriveFile } from '@/models/entities/DriveFile.js';
import type { Webhook, webhookEventTypes } from '@/models/entities/Webhook.js';
import type { Config } from '@/config.js';
import { DI } from '@/di-symbols.js';
import { bindThis } from '@/decorators.js';
import type { DbQueue, DeliverQueue, EndedPollNotificationQueue, InboxQueue, ObjectStorageQueue, RelationshipQueue, SystemQueue, WebhookDeliverQueue } from './QueueModule.js';
import type { DbJobData, RelationshipJobData, ThinUser } from '../queue/types.js';
import type httpSignature from '@peertube/http-signature';
import Bull from 'bull';

@Injectable()
export class QueueService {
	constructor(
		@Inject(DI.config)
		private config: Config,

		@Inject('queue:system') public systemQueue: SystemQueue,
		@Inject('queue:endedPollNotification') public endedPollNotificationQueue: EndedPollNotificationQueue,
		@Inject('queue:deliver') public deliverQueue: DeliverQueue,
		@Inject('queue:inbox') public inboxQueue: InboxQueue,
		@Inject('queue:db') public dbQueue: DbQueue,
		@Inject('queue:relationship') public relationshipQueue: RelationshipQueue,
		@Inject('queue:objectStorage') public objectStorageQueue: ObjectStorageQueue,
		@Inject('queue:webhookDeliver') public webhookDeliverQueue: WebhookDeliverQueue,
	) {}

	@bindThis
	public deliver(user: ThinUser, content: IActivity | null, to: string | null, isSharedInbox: boolean) {
		if (content == null) return null;
		if (to == null) return null;

		const data = {
			user: {
				id: user.id,
			},
			content,
			to,
			isSharedInbox,
		};

		return this.deliverQueue.add(data, {
			attempts: this.config.deliverJobMaxAttempts ?? 12,
			timeout: 1 * 60 * 1000,	// 1min
			backoff: {
				type: 'apBackoff',
			},
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public inbox(activity: IActivity, signature: httpSignature.IParsedSignature) {
		const data = {
			activity: activity,
			signature,
		};

		return this.inboxQueue.add(data, {
			attempts: this.config.inboxJobMaxAttempts ?? 8,
			timeout: 5 * 60 * 1000,	// 5min
			backoff: {
				type: 'apBackoff',
			},
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createDeleteDriveFilesJob(user: ThinUser) {
		return this.dbQueue.add('deleteDriveFiles', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportCustomEmojisJob(user: ThinUser) {
		return this.dbQueue.add('exportCustomEmojis', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportNotesJob(user: ThinUser) {
		return this.dbQueue.add('exportNotes', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportFavoritesJob(user: ThinUser) {
		return this.dbQueue.add('exportFavorites', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportFollowingJob(user: ThinUser, excludeMuting = false, excludeInactive = false) {
		return this.dbQueue.add('exportFollowing', {
			user: { id: user.id },
			excludeMuting,
			excludeInactive,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportMuteJob(user: ThinUser) {
		return this.dbQueue.add('exportMuting', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportBlockingJob(user: ThinUser) {
		return this.dbQueue.add('exportBlocking', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createExportUserListsJob(user: ThinUser) {
		return this.dbQueue.add('exportUserLists', {
			user: { id: user.id },
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createImportFollowingJob(user: ThinUser, fileId: DriveFile['id']) {
		return this.dbQueue.add('importFollowing', {
			user: { id: user.id },
			fileId: fileId,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createImportFollowingToDbJob(user: ThinUser, targets: string[]) {
		const jobs = targets.map(rel => this.generateToDbJobData('importFollowingToDb', { user, target: rel }));
		return this.dbQueue.addBulk(jobs);
	}

	@bindThis
	public createImportMutingJob(user: ThinUser, fileId: DriveFile['id']) {
		return this.dbQueue.add('importMuting', {
			user: { id: user.id },
			fileId: fileId,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createImportBlockingJob(user: ThinUser, fileId: DriveFile['id']) {
		return this.dbQueue.add('importBlocking', {
			user: { id: user.id },
			fileId: fileId,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createImportBlockingToDbJob(user: ThinUser, targets: string[]) {
		const jobs = targets.map(rel => this.generateToDbJobData('importBlockingToDb', { user, target: rel }));
		return this.dbQueue.addBulk(jobs);
	}

	@bindThis
	private generateToDbJobData<T extends 'importFollowingToDb' | 'importBlockingToDb', D extends DbJobData<T>>(name: T, data: D): {
		name: string,
		data: D,
		opts: Bull.JobOptions,
	} {
		return {
			name,
			data,
			opts: {
				removeOnComplete: true,
				removeOnFail: true,
			},
		};
	}

	@bindThis
	public createImportUserListsJob(user: ThinUser, fileId: DriveFile['id']) {
		return this.dbQueue.add('importUserLists', {
			user: { id: user.id },
			fileId: fileId,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createImportCustomEmojisJob(user: ThinUser, fileId: DriveFile['id']) {
		return this.dbQueue.add('importCustomEmojis', {
			user: { id: user.id },
			fileId: fileId,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createDeleteAccountJob(user: ThinUser, opts: { soft?: boolean; } = {}) {
		return this.dbQueue.add('deleteAccount', {
			user: { id: user.id },
			soft: opts.soft,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createFollowJob(followings: { from: ThinUser, to: ThinUser, requestId?: string, silent?: boolean }[]) {
		const jobs = followings.map(rel => this.generateRelationshipJobData('follow', rel));
		return this.relationshipQueue.addBulk(jobs);
	}

	@bindThis
	public createUnfollowJob(followings: { from: ThinUser, to: ThinUser, requestId?: string }[]) {
		const jobs = followings.map(rel => this.generateRelationshipJobData('unfollow', rel));
		return this.relationshipQueue.addBulk(jobs);
	}

	@bindThis
	public createDelayedUnfollowJob(followings: { from: ThinUser, to: ThinUser, requestId?: string }[], delay: number) {
		const jobs = followings.map(rel => this.generateRelationshipJobData('unfollow', rel, { delay }));
		return this.relationshipQueue.addBulk(jobs);
	}

	@bindThis
	public createBlockJob(blockings: { from: ThinUser, to: ThinUser, silent?: boolean }[]) {
		const jobs = blockings.map(rel => this.generateRelationshipJobData('block', rel));
		return this.relationshipQueue.addBulk(jobs);
	}

	@bindThis
	public createUnblockJob(blockings: { from: ThinUser, to: ThinUser, silent?: boolean }[]) {
		const jobs = blockings.map(rel => this.generateRelationshipJobData('unblock', rel));
		return this.relationshipQueue.addBulk(jobs);
	}

	@bindThis
	private generateRelationshipJobData(name: 'follow' | 'unfollow' | 'block' | 'unblock', data: RelationshipJobData, opts: Bull.JobOptions = {}): {
		name: string,
		data: RelationshipJobData,
		opts: Bull.JobOptions,
	} {
		return {
			name,
			data: {
				from: { id: data.from.id },
				to: { id: data.to.id },
				silent: data.silent,
				requestId: data.requestId,
			},
			opts: {
				removeOnComplete: true,
				removeOnFail: true,
				...opts,
			},
		};
	}

	@bindThis
	public createDeleteObjectStorageFileJob(key: string) {
		return this.objectStorageQueue.add('deleteFile', {
			key: key,
		}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public createCleanRemoteFilesJob() {
		return this.objectStorageQueue.add('cleanRemoteFiles', {}, {
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public webhookDeliver(webhook: Webhook, type: typeof webhookEventTypes[number], content: unknown) {
		const data = {
			type,
			content,
			webhookId: webhook.id,
			userId: webhook.userId,
			to: webhook.url,
			secret: webhook.secret,
			createdAt: Date.now(),
			eventId: uuid(),
		};

		return this.webhookDeliverQueue.add(data, {
			attempts: 4,
			timeout: 1 * 60 * 1000,	// 1min
			backoff: {
				type: 'apBackoff',
			},
			removeOnComplete: true,
			removeOnFail: true,
		});
	}

	@bindThis
	public destroy() {
		this.deliverQueue.once('cleaned', (jobs, status) => {
			//deliverLogger.succ(`Cleaned ${jobs.length} ${status} jobs`);
		});
		this.deliverQueue.clean(0, 'delayed');

		this.inboxQueue.once('cleaned', (jobs, status) => {
			//inboxLogger.succ(`Cleaned ${jobs.length} ${status} jobs`);
		});
		this.inboxQueue.clean(0, 'delayed');
	}
}