import { DeleteResult, EntityManager, In, Not } from 'typeorm';
import { Db } from '..';
import { SharedWorkflow } from '../databases/entities/SharedWorkflow';
import { User } from '../databases/entities/User';
import { WorkflowEntity } from '../databases/entities/WorkflowEntity';
import { RoleService } from '../role/role.service';
import { UserService } from '../user/user.service';
import { WorkflowsService } from './workflows.services';

export class EEWorkflowsService extends WorkflowsService {
	static async isOwned(
		user: User,
		workflowId: string,
	): Promise<{ ownsWorkflow: boolean; workflow?: WorkflowEntity }> {
		const sharing = await this.getSharing(user, workflowId, ['workflow', 'role'], {
			allowGlobalOwner: false,
		});

		if (!sharing || sharing.role.name !== 'owner') return { ownsWorkflow: false };

		const { workflow } = sharing;

		return { ownsWorkflow: true, workflow };
	}

	static async getSharings(
		transaction: EntityManager,
		workflowId: string,
	): Promise<SharedWorkflow[]> {
		const workflow = await transaction.findOne(WorkflowEntity, workflowId, {
			relations: ['shared'],
		});
		return workflow?.shared ?? [];
	}

	static async pruneSharings(
		transaction: EntityManager,
		workflowId: string,
		userIds: string[],
	): Promise<DeleteResult> {
		return transaction.delete(SharedWorkflow, {
			workflow: { id: workflowId },
			user: { id: Not(In(userIds)) },
		});
	}

	static async share(
		transaction: EntityManager,
		workflow: WorkflowEntity,
		shareWithIds: string[],
	): Promise<SharedWorkflow[]> {
		const [users, role] = await Promise.all([
			UserService.getByIds(transaction, shareWithIds),
			RoleService.trxGet(transaction, { scope: 'workflow', name: 'editor' }),
		]);

		const newSharedWorkflows = users.reduce<SharedWorkflow[]>((acc, user) => {
			if (user.isPending) {
				return acc;
			}
			acc.push(
				Db.collections.SharedWorkflow.create({
					workflow,
					user,
					role,
				}),
			);
			return acc;
		}, []);

		return transaction.save(newSharedWorkflows);
	}
}