import { Router } from 'express';
import { z } from 'zod';
import { ingestAuth } from '../middleware/ingestAuth.js';
import { ingestLimiter } from '../middleware/rateLimit.js';
import { ingest } from '../services/ingest.service.js';

const MessageSchema = z.object({
  messageId: z.string().min(1),
  sendTime: z.string().datetime(),
  sender: z.string().optional(),
  direction: z.enum(['incoming', 'outgoing', 'system']),
  content: z.string(),
  translation: z.string().optional().default(''),
});

const BehaviorSchema = z
  .object({
    productViews: z.number().nullable().optional(),
    validInquiries: z.number().nullable().optional(),
    validRfq: z.number().nullable().optional(),
    loginDays: z.number().nullable().optional(),
    spamInquiries: z.number().nullable().optional(),
    blacklistCount: z.number().nullable().optional(),
    topIndustry: z.string().nullable().optional(),
  })
  .optional();

const PayloadSchema = z.object({
  inquiry: z.object({
    inquiryId: z.string().min(1),
    manager: z.string().optional(),
    createTime: z.string().datetime(),
    updateTime: z.string().datetime(),
    status: z.string().optional(),
    msgPreview: z.string().optional(),
    isFlagged: z.boolean().optional().default(false),
  }),
  customer: z
    .object({
      customerId: z.string().min(1),
      name: z.string().optional(),
      country: z.string().nullable().optional(),
      email: z.string().nullable().optional(),
      landline: z.string().nullable().optional(),
      businessType: z.string().nullable().optional(),
      salesPlatform: z.string().nullable().optional(),
      website: z.string().nullable().optional(),
      phone: z.string().nullable().optional(),
      company: z.string().nullable().optional(),
      registerTime: z.string().nullable().optional(),  // 页面是 "2016-08-27"（日期非 ISO），放宽
      avatarUrl: z.string().optional(),
      buyerTags: z.string().optional(),
      buyerFeatures: z.string().optional(),
      recentInquiryProducts: z.array(z.string()).optional(),
      storeInquiryProduct: z.string().nullable().optional(),
      storeInquiryQty: z.string().nullable().optional(),
      storeVisitProducts: z.array(z.object({ img: z.string().optional(), url: z.string().optional(), productId: z.string().optional() })).optional(),
      behavior: BehaviorSchema,
    })
    .nullable(),
  messages: z.array(MessageSchema).min(0),  // 阶段1:允许空（先走通列表+客户+行为,聊天后续补充）
});

export const ingestRouter = Router();

ingestRouter.post('/', ingestLimiter, ingestAuth, async (req, res, next) => {
  const parsed = PayloadSchema.safeParse(req.body);
  if (!parsed.success) {
    // format() 显示完整 path(如 messages.0.sendTime),便于定位 null 字段
    console.error('[ingest 400]', JSON.stringify(parsed.error.format()));
    return res
      .status(400)
      .json({ error: 'invalid payload', issues: parsed.error.flatten() });
  }
  try {
    const d = parsed.data;
    console.log(`[ingest in] inquiry=${d.inquiry?.inquiryId} customer=${d.customer?.customerId ?? '-'} messages=${d.messages?.length ?? 0}`);
    const result = await ingest(d);
    console.log(`[ingest ok] inquiry=${d.inquiry?.inquiryId} -> ${JSON.stringify(result)}`);
    res.json(result);
  } catch (e) {
    console.error('[ingest err] inquiry=', parsed.data.inquiry?.inquiryId, e);
    next(e);
  }
});