/**
 * 纪要用例(编码规范 §10.2)。
 *
 * 「决议可经**登记触发**转为工作流的启动 —— 登记人即来源。」(OS 2.1 / 3.1)
 * 这是纪要与责任之间**唯一**的通路:纪要本身不产生责任。
 */
import type { MinuteService } from '../../contract.ts';
import { MinuteNotFoundError, ResolutionAlreadyRegisteredError } from '../../contract.ts';
import type { MinuteDeps } from '../../port.ts';
import { addResolution, markRegistered, newMinute, registeredWorkflowOf } from '../domain/minute.ts';

export function createMinuteService(deps: MinuteDeps): MinuteService {
  async function require(minuteId: string) {
    const minute = await deps.store.get(minuteId);
    if (minute === undefined) throw new MinuteNotFoundError(minuteId);
    return minute;
  }

  return {
    list: (limit = 50) => deps.store.list(limit),
    get: (minuteId) => require(minuteId),

    async create(input) {
      const minute = newMinute({
        id: deps.ids.next(),
        title: input.title,
        body: input.body,
        authorId: input.authorId,
        participants: input.participants ?? [],
        occurredOn: input.occurredOn,
        resolutions: (input.resolutions ?? []).map((r) => ({
          id: deps.ids.next(),
          text: r.text,
          ownerId: r.ownerId,
        })),
        at: deps.clock.now().toISOString(),
      });
      await deps.store.save(minute);
      return minute;
    },

    async appendResolution(minuteId, text, ownerId) {
      const minute = await require(minuteId);
      const next = addResolution(
        minute,
        { id: deps.ids.next(), text, ownerId },
        deps.clock.now().toISOString(),
      );
      await deps.store.save(next);
      return next;
    },

    async register(input) {
      const all = await deps.store.list(200);
      const minute = all.find((m) => m.resolutions.some((r) => r.id === input.resolutionId));
      if (minute === undefined) throw new MinuteNotFoundError(input.resolutionId);

      // 同一决议不重复起单:起单一刻就已经有一条带来源的工作流在跑了
      const already = registeredWorkflowOf(minute, input.resolutionId);
      if (already !== undefined) throw new ResolutionAlreadyRegisteredError(input.resolutionId, already);

      const resolution = minute.resolutions.find((r) => r.id === input.resolutionId)!;
      const started = await deps.registration.start({
        processPackageId: input.processPackageId,
        subject: resolution.text,
        data: input.data,
        byId: input.byId,
      });

      const next = markRegistered(minute, input.resolutionId, {
        workflowId: started.workflowId,
        byId: input.byId,
        at: deps.clock.now().toISOString(),
      })!;
      await deps.store.save(next);
      return { workflowId: started.workflowId, resolutionId: input.resolutionId };
    },
  };
}