/**
 * 入站路由 —— 模拟邮件通道的注入口(编码规范 §3;README MVP 完成判据)。
 *
 * mock 只允许出现在**外界**:这条路由代替真实 IMAP 拉件,
 * 之后的归属解析、事件流、三级消费、系统写全部是真机制。
 */
import type { Hono } from 'hono';
import type { ApiError } from '@contracts';
import { ingestMailRoute } from '@contracts';
import { ChannelDisabledError, ChannelNotFoundError } from '@modules/channel';
import type { Container } from '../container.ts';
import type { AppEnv } from '../http-env.ts';

export function registerIngestRoutes(app: Hono<AppEnv>, container: Container): void {
  app.post(ingestMailRoute.path, async (c) => {
    const parsed = ingestMailRoute.body.safeParse(await c.req.json());
    if (!parsed.success) {
      const body: ApiError = { code: 'validation-failed', message: '入站邮件不合 schema', detail: parsed.error.issues };
      return c.json(body, 400);
    }
    try {
      const outcome = await container.channel.ingestMail(c.req.param('channelId'), parsed.data);
      return c.json({
        eventId: outcome.eventId,
        resolution: outcome.resolution,
        listenersHit: outcome.listenersHit,
        triggersHit: outcome.triggersHit,
        fellBackToMessage: outcome.fellBackToMessage,
      });
    } catch (error) {
      if (error instanceof ChannelNotFoundError) {
        const body: ApiError = { code: 'not-found', message: error.message };
        return c.json(body, 404);
      }
      if (error instanceof ChannelDisabledError) {
        const body: ApiError = { code: 'precondition-failed', message: error.message };
        return c.json(body, 412);
      }
      throw error;
    }
  });
}