import { Hono } from "hono";
import { db } from "../db/client.js";
import { users } from "../db/schema.js";
import { eq, and, ne } from "drizzle-orm";
import { hashPassword, verifyPassword, getSessionUserId, type AppEnv } from "../lib/auth.js";
import { validateProfile, validateResetPassword } from "../lib/validate.js";
import { render } from "../lib/render.js";

export const profileRouter = new Hono<AppEnv>();

async function requireUser(c: Parameters<typeof getSessionUserId>[0]) {
  const id = getSessionUserId(c);
  if (!id) return null;
  const [user] = await db.select().from(users).where(eq(users.id, id)).limit(1);
  return user ?? null;
}

profileRouter.get("/profile", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);
  return c.html(render("profile_view.njk", { user }));
});

profileRouter.get("/profile/edit", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);
  return c.html(render("profile_edit.njk", { user }));
});

profileRouter.post("/profile/edit", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);

  const form = await c.req.formData();
  const data: Record<string, string> = {};
  form.forEach((v, k) => { data[k] = String(v); });

  const errors = validateProfile(data);
  if (!errors.length) {
    const existing = await db.select().from(users).where(
      and(eq(users.phone, data.phone.trim()), ne(users.id, user.id))
    ).limit(1);
    if (existing.length) errors.push("Пользователь с таким телефоном уже существует");
  }

  if (errors.length) {
    return c.html(render("profile_edit.njk", { user, errors, form: data }));
  }

  await db.update(users)
    .set({ first_name: data.first_name.trim(), last_name: data.last_name.trim(), phone: data.phone.trim() })
    .where(eq(users.id, user.id));

  const [updated] = await db.select().from(users).where(eq(users.id, user.id)).limit(1);
  return c.html(render("profile_edit.njk", { user: updated, success: "Профиль обновлен" }));
});

profileRouter.get("/profile/change-password", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);
  return c.html(render("profile_change_password.njk", { user }));
});

profileRouter.post("/profile/change-password", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);

  const form = await c.req.formData();
  const data: Record<string, string> = {};
  form.forEach((v, k) => { data[k] = String(v); });

  const errors: string[] = [];
  const currentPassword = data.current_password ?? "";
  if (!currentPassword) {
    errors.push("Введите текущий пароль");
  } else if (!(await verifyPassword(currentPassword, user.password_hash))) {
    errors.push("Неверный текущий пароль");
  }
  errors.push(...validateResetPassword(data));

  if (errors.length) {
    return c.html(render("profile_change_password.njk", { user, errors }));
  }

  await db.update(users)
    .set({ password_hash: await hashPassword(data.password) })
    .where(eq(users.id, user.id));

  return c.html(render("profile_change_password.njk", { user, success: "Пароль изменен" }));
});

profileRouter.get("/profile/delete", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);
  return c.html(render("profile_delete.njk", { user }));
});

profileRouter.post("/profile/delete", async (c) => {
  const user = await requireUser(c);
  if (!user) return c.redirect("/login", 303);

  const form = await c.req.formData();
  const password = String(form.get("password") ?? "");

  if (!password) {
    return c.html(render("profile_delete.njk", { user, errors: ["Введите пароль для подтверждения"] }));
  }
  if (!(await verifyPassword(password, user.password_hash))) {
    return c.html(render("profile_delete.njk", { user, errors: ["Неверный пароль"] }));
  }

  await db.delete(users).where(eq(users.id, user.id));
  const session = c.get("session") as { deleteSession: () => void };
  session.deleteSession();
  return c.redirect("/", 303);
});