import { Router } from "express";
import { pool } from "../db.js";
import { submitLimiter } from "../middleware/rate-limit.js";
import { createIssue } from "../erpnext-client.js";

const router = Router();

const VALID_CATEGORIES = ["question", "support", "issue", "service_request", "quote"] as const;

// POST /api/v1/tickets
router.post("/api/v1/tickets", submitLimiter, async (req, res) => {
  try {
    const { category, subject, message, email, name, page } = req.body ?? {};

    // Validate category
    if (!category || !VALID_CATEGORIES.includes(category)) {
      res.status(400).json({
        error: `Category must be one of: ${VALID_CATEGORIES.join(", ")}`,
      });
      return;
    }

    // Validate subject
    if (!subject || typeof subject !== "string" || subject.trim().length < 3) {
      res.status(400).json({ error: "Subject must be at least 3 characters." });
      return;
    }
    if (subject.length > 200) {
      res.status(400).json({ error: "Subject must be under 200 characters." });
      return;
    }

    // Validate message
    if (!message || typeof message !== "string" || message.trim().length < 10) {
      res.status(400).json({ error: "Message must be at least 10 characters." });
      return;
    }
    if (message.length > 5000) {
      res.status(400).json({ error: "Message must be under 5000 characters." });
      return;
    }

    // Optional email validation
    if (email && typeof email === "string" && !/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)) {
      res.status(400).json({ error: "Invalid email format." });
      return;
    }

    const ip = (req as any).clientIp || req.ip || "";

    // Store locally in PostgreSQL (backup)
    const result = await pool.query(
      `INSERT INTO tickets (category, subject, message, email, name, page, ip_address)
       VALUES ($1, $2, $3, $4, $5, $6, $7)
       RETURNING id`,
      [category, subject.trim(), message.trim(), email || null, name || null, page || null, ip],
    );

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

    // Push to ERPNext as an Issue — non-blocking, don't fail the response
    let erpnextIssueName: string | undefined;
    try {
      const description = [
        message.trim(),
        "",
        "---",
        `Category: ${category}`,
        name ? `Name: ${name}` : null,
        email ? `Email: ${email}` : null,
        page ? `Page: ${page}` : null,
        `IP: ${ip}`,
        `Source: performancewest.net support widget`,
      ]
        .filter(Boolean)
        .join("\n");

      const erpIssue = await createIssue({
        subject: subject.trim(),
        description,
        priority: "Medium",
      });

      erpnextIssueName = (erpIssue as any)?.name;
    } catch (erpErr) {
      console.error("[tickets] ERPNext createIssue failed (non-fatal):", erpErr);
    }

    res.status(201).json({
      success: true,
      message: "Request received. We'll get back to you within one business day.",
      ticket_id: erpnextIssueName || (ticketId ? String(ticketId) : undefined),
    });
  } catch (err) {
    console.error("[tickets] Error:", err);
    res.status(500).json({ error: "Could not submit your request. Please try again." });
  }
});

export default router;