import { Router } from "express";
import { db } from "../db.ts";
import type { AuthedRequest } from "../lib/auth.ts";
import { err, ownerOnly } from "../lib/auth.ts";

export const servicesRouter = Router();

function attachEmployees(svc: any) {
  const ids = db
    .prepare(`SELECT employee_id FROM employee_services WHERE service_id = ?`)
    .all(svc.id)
    .map((r: any) => r.employee_id);
  svc.employee_ids = ids;
  return svc;
}

servicesRouter.get("/", (req: AuthedRequest, res) => {
  const { employee_id, active } = req.query;
  let rows: any[];
  if (employee_id) {
    rows = db
      .prepare(
        `SELECT s.* FROM services s
         JOIN employee_services es ON es.service_id = s.id
         WHERE s.business_id = ? AND es.employee_id = ?
         ORDER BY s.category, s.name`
      )
      .all(req.user!.business_id, Number(employee_id));
  } else {
    rows = db
      .prepare(
        `SELECT * FROM services WHERE business_id = ? ORDER BY category, name`
      )
      .all(req.user!.business_id);
  }
  if (active === "true") rows = rows.filter((r) => r.active === 1);
  rows.forEach(attachEmployees);
  res.json({ services: rows });
});

servicesRouter.post("/", ownerOnly, (req: AuthedRequest, res) => {
  const { name, category, description, duration_min, price, color, employee_ids, active } = req.body ?? {};
  if (!name) return err(res, 400, "El nombre es obligatorio");
  const r = db
    .prepare(
      `INSERT INTO services (business_id, name, category, description, duration_min, price, color, active)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?) RETURNING *`
    )
    .get(
      req.user!.business_id,
      name,
      category || "General",
      description || null,
      Number(duration_min) || 60,
      Number(price) || 0,
      color || "#3b66ff",
      active === false ? 0 : 1
    ) as any;
  if (Array.isArray(employee_ids)) {
    const ins = db.prepare(`INSERT OR IGNORE INTO employee_services (employee_id, service_id) VALUES (?, ?)`);
    for (const eid of employee_ids) ins.run(Number(eid), r.id);
  }
  attachEmployees(r);
  res.status(201).json({ service: r });
});

servicesRouter.patch("/:id", ownerOnly, (req: AuthedRequest, res) => {
  const id = Number(req.params.id);
  const existing = db
    .prepare(`SELECT * FROM services WHERE id = ? AND business_id = ?`)
    .get(id, req.user!.business_id) as any;
  if (!existing) return err(res, 404, "Servicio no encontrado");
  const { name, category, description, duration_min, price, color, active, employee_ids } = req.body ?? {};
  const merged = {
    name: name ?? existing.name,
    category: category ?? existing.category,
    description: description ?? existing.description,
    duration_min: duration_min === undefined ? existing.duration_min : Number(duration_min),
    price: price === undefined ? existing.price : Number(price),
    color: color ?? existing.color,
    active: active === undefined ? existing.active : active ? 1 : 0,
  };
  db.prepare(
    `UPDATE services SET name = ?, category = ?, description = ?, duration_min = ?, price = ?, color = ?, active = ? WHERE id = ?`
  ).run(
    merged.name,
    merged.category,
    merged.description,
    merged.duration_min,
    merged.price,
    merged.color,
    merged.active,
    id
  );
  if (Array.isArray(employee_ids)) {
    db.prepare(`DELETE FROM employee_services WHERE service_id = ?`).run(id);
    const ins = db.prepare(`INSERT OR IGNORE INTO employee_services (employee_id, service_id) VALUES (?, ?)`);
    for (const eid of employee_ids) ins.run(Number(eid), id);
  }
  const updated = db.prepare(`SELECT * FROM services WHERE id = ?`).get(id) as any;
  attachEmployees(updated);
  res.json({ service: updated });
});

servicesRouter.delete("/:id", ownerOnly, (req: AuthedRequest, res) => {
  const id = Number(req.params.id);
  const existing = db
    .prepare(`SELECT id FROM services WHERE id = ? AND business_id = ?`)
    .get(id, req.user!.business_id);
  if (!existing) return err(res, 404, "Servicio no encontrado");
  db.prepare(`DELETE FROM services WHERE id = ?`).run(id);
  res.json({ ok: true });
});