import { CommandHandler, ICommandHandler } from '@nestjs/cqrs';
import { ReleaseNamesRepository } from '../ports/release-names.repository';
import { CommandResult, ack } from './command-result';
import { UpdateReleaseCommand } from './update-release.command';
import { WriteAccess } from './write-access';

@CommandHandler(UpdateReleaseCommand)
export class UpdateReleaseCommandHandler
  implements ICommandHandler<UpdateReleaseCommand>
{
  constructor(
    private readonly access: WriteAccess,
    private readonly releaseNames: ReleaseNamesRepository,
  ) {}

  async execute(command: UpdateReleaseCommand): Promise<CommandResult> {
    const release = await this.access.release(command.releaseId);
    (await this.access.project(release.projectId)).assertCanManage(
      command.actorId,
    );

    const previousName = release.name;
    release.update(command.actorId, command.changes);
    if (release.name !== previousName) {
      await this.releaseNames.reserve(
        release.projectId,
        release.name,
        release.id,
      );
    }
    await release.commitAndWait();
    if (release.name !== previousName) {
      await this.releaseNames.free(release.projectId, previousName);
    }
    return ack(release);
  }
}