import { Router } from "express";
import { pool } from "../db.js";
import { submitLimiter } from "../middleware/rate-limit.js";
import { v4 as uuidv4 } from "uuid";
import { createResource, createServiceOrder } from "../erpnext-client.js";

const router = Router();

// POST /api/v1/quotes — Request a custom quote for a service
router.post("/api/v1/quotes", submitLimiter, async (req, res) => {
  try {
    const { name, email, company, phone, service_slug, details } = req.body ?? {};

    if (!name || typeof name !== "string" || name.trim().length < 2) {
      res.status(400).json({ error: "Name is required (at least 2 characters)." });
      return;
    }

    if (!email || typeof email !== "string" || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
      res.status(400).json({ error: "Valid email address is required." });
      return;
    }

    if (!service_slug || typeof service_slug !== "string") {
      res.status(400).json({ error: "Service selection is required." });
      return;
    }

    const result = await pool.query(
      `INSERT INTO quotes (name, email, company, phone, service_slug, details, status)
       VALUES ($1, $2, $3, $4, $5, $6, 'pending')
       RETURNING id`,
      [
        name.trim(),
        email.toLowerCase().trim(),
        company || null,
        phone || null,
        service_slug.trim(),
        details || null,
      ],
    );

    const quoteId = result.rows[0]?.id;

    // Push to ERPNext as an Opportunity — non-blocking, don't fail the response
    try {
      await createResource("Opportunity", {
        opportunity_from: "Lead",
        party_name: email.toLowerCase().trim(),
        contact_email: email.toLowerCase().trim(),
        opportunity_type: "Sales",
        custom_service_slug: service_slug.trim(),
        notes: [
          `Name: ${name.trim()}`,
          company ? `Company: ${company}` : null,
          phone ? `Phone: ${phone}` : null,
          details ? `Details: ${details}` : null,
          `Source: performancewest.net quote form`,
        ]
          .filter(Boolean)
          .join("\n"),
      });
    } catch (erpErr) {
      console.error("[quotes] ERPNext Opportunity creation failed (non-fatal):", erpErr);
    }

    res.status(201).json({
      success: true,
      message: "Quote request received. We'll send your quote within one business day.",
      quote_id: quoteId ? String(quoteId) : undefined,
    });
  } catch (err) {
    console.error("[quotes] Error:", err);
    res.status(500).json({ error: "Could not submit your request. Please try again." });
  }
});

// POST /api/v1/orders — Place a fixed-price service order
router.post("/api/v1/orders", submitLimiter, async (req, res) => {
  try {
    const { name, email, company, service_slug, amount_cents, quote_id } = req.body ?? {};

    if (!name || typeof name !== "string" || name.trim().length < 2) {
      res.status(400).json({ error: "Name is required." });
      return;
    }

    if (!email || typeof email !== "string" || !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
      res.status(400).json({ error: "Valid email address is required." });
      return;
    }

    if (!service_slug || typeof service_slug !== "string") {
      res.status(400).json({ error: "Service selection is required." });
      return;
    }

    // Generate order number: PW-YYYY-XXXX
    const year = new Date().getFullYear();
    const short = uuidv4().split("-")[0]!.toUpperCase();
    const orderNumber = `PW-${year}-${short}`;

    const result = await pool.query(
      `INSERT INTO orders (order_number, quote_id, service_slug, name, email, company, status, amount_cents)
       VALUES ($1, $2, $3, $4, $5, $6, 'received', $7)
       RETURNING id, order_number`,
      [
        orderNumber,
        quote_id || null,
        service_slug.trim(),
        name.trim(),
        email.toLowerCase().trim(),
        company || null,
        amount_cents || null,
      ],
    );

    const row = result.rows[0];

    // Push to ERPNext as a Sales Order — non-blocking, don't fail the response
    try {
      await createServiceOrder({
        customer: name.trim(),
        service_slug: service_slug.trim(),
        notes: [
          `Order: ${orderNumber}`,
          company ? `Company: ${company}` : null,
          quote_id ? `Quote ref: ${quote_id}` : null,
          `Source: performancewest.net`,
        ]
          .filter(Boolean)
          .join("\n"),
      });
    } catch (erpErr) {
      console.error("[orders] ERPNext Sales Order creation failed (non-fatal):", erpErr);
    }

    res.status(201).json({
      success: true,
      message: "Order received. We'll begin processing within one business day.",
      order_number: row?.order_number,
    });
  } catch (err) {
    console.error("[orders] Error:", err);
    res.status(500).json({ error: "Could not place your order. Please try again." });
  }
});

export default router;