import { Injectable } from '@nestjs/common';
import { CommandBus, QueryBus } from '@nestjs/cqrs';
import {
  AutomationInput,
  CreateAutomationCommand,
  DeleteAutomationCommand,
  GetAutomationsQuery,
  RunAutomationCommand,
  UpdateAutomationCommand,
} from './automations/automations';
import { Automation } from './ports/automations.repository';

/** The project's automation rules (owners and admins). */
@Injectable()
export class AutomationsService {
  constructor(
    private readonly commandBus: CommandBus,
    private readonly queryBus: QueryBus,
  ) {}

  list(viewerId: string, projectId: string): Promise<Automation[]> {
    return this.queryBus.execute(new GetAutomationsQuery(viewerId, projectId));
  }

  create(
    actorId: string,
    projectId: string,
    rule: AutomationInput,
  ): Promise<Automation> {
    return this.commandBus.execute(
      new CreateAutomationCommand(actorId, projectId, rule),
    );
  }

  update(
    actorId: string,
    automationId: string,
    changes: { name?: string; active?: boolean },
  ): Promise<Automation> {
    return this.commandBus.execute(
      new UpdateAutomationCommand(actorId, automationId, changes),
    );
  }

  /** Runs a rule on a ticket; the error, if any, as text. */
  run(automation: Automation, issueId: string): Promise<string | null> {
    return this.commandBus.execute(
      new RunAutomationCommand(automation, issueId),
    );
  }

  delete(actorId: string, automationId: string): Promise<void> {
    return this.commandBus.execute(
      new DeleteAutomationCommand(actorId, automationId),
    );
  }
}