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 settingsRouter = Router();

const FIELDS = [
  "name",
  "industry",
  "phone",
  "address",
  "slug",
  "booking_enabled",
  "cancel_window_hours",
  "cancel_penalty_pct",
  "require_deposit",
  "deposit_pct",
  "timezone",
  "auto_assign_specialist",
  "working_hours",
] as const;

settingsRouter.get("/", (req: AuthedRequest, res) => {
  const b = db
    .prepare(
      `SELECT id, name, industry, currency, currency_symbol, phone, address, slug, booking_enabled,
              cancel_window_hours, cancel_penalty_pct, require_deposit, deposit_pct, timezone,
              auto_assign_specialist, working_hours
       FROM businesses WHERE id = ?`
    )
    .get(req.user!.business_id) as any;
  if (!b) return err(res, 404, "Negocio no encontrado");
  res.json({ settings: b });
});

settingsRouter.patch("/", ownerOnly, (req: AuthedRequest, res) => {
  const existing = db.prepare(`SELECT * FROM businesses WHERE id = ?`).get(req.user!.business_id) as any;
  if (!existing) return err(res, 404, "Negocio no encontrado");
  const body = req.body ?? {};
  const merged: any = {};
  for (const f of FIELDS) {
    if (body[f] !== undefined) merged[f] = body[f];
  }
  if (merged.working_hours && typeof merged.working_hours !== "string") {
    merged.working_hours = JSON.stringify(merged.working_hours);
  }
  if (merged.auto_assign_specialist !== undefined) {
    merged.auto_assign_specialist = merged.auto_assign_specialist ? 1 : 0;
  }
  // slug uniqueness check
  if (merged.slug !== undefined) {
    merged.slug = String(merged.slug).trim().toLowerCase().replace(/[^a-z0-9-]/g, "-").replace(/-+/g, "-").replace(/^-|-$/g, "");
    if (!merged.slug) return err(res, 400, "El slug no puede quedar vacío");
    const clash = db.prepare(`SELECT id FROM businesses WHERE slug = ? AND id != ?`).get(merged.slug, req.user!.business_id);
    if (clash) return err(res, 409, "Esa URL ya está en uso");
  }
  const sets = Object.keys(merged).map((k) => `${k} = @${k}`);
  if (sets.length === 0) return res.json({ settings: existing });
  merged.id = req.user!.business_id;
  db.prepare(`UPDATE businesses SET ${sets.join(", ")} WHERE id = @id`).run(merged);
  const updated = db
    .prepare(`SELECT id, name, industry, currency, currency_symbol, phone, address, slug, booking_enabled, cancel_window_hours, cancel_penalty_pct, require_deposit, deposit_pct, timezone, auto_assign_specialist, working_hours FROM businesses WHERE id = ?`)
    .get(req.user!.business_id);
  res.json({ settings: updated });
});