'use server';

import { prisma } from '@/app/lib/prisma';
import { revalidatePath } from 'next/cache';
import { cookies } from 'next/headers';
import { redirect } from 'next/navigation';
import bcrypt from 'bcryptjs';
import { encrypt } from '@/app/lib/auth';

/* ────── Auth Actions ────── */

export async function authenticate(formData: FormData) {
  const username = formData.get('username') as string;
  const password = formData.get('password') as string;

  const user = await prisma.user.findUnique({ where: { username } });

  if (!user || !(await bcrypt.compare(password, user.password))) {
    return { error: 'Geçersiz kullanıcı adı veya şifre' };
  }

  // Create session
  const expires = new Date(Date.now() + 2 * 60 * 60 * 1000); // 2 hours
  const session = await encrypt({ userId: user.id, username: user.username, expires });

  (await cookies()).set('session', session, { expires, httpOnly: true });
  
  redirect('/admin');
}

export async function signout() {
  (await cookies()).set('session', '', { expires: new Date(0) });
  redirect('/login');
}

/* ────── User Actions ────── */

export async function createAdmin(formData: FormData) {
  const username = formData.get('username') as string;
  const password = formData.get('password') as string;

  const hashedPassword = await bcrypt.hash(password, 10);

  await prisma.user.create({
    data: {
      username,
      password: hashedPassword,
    },
  });

  revalidatePath('/admin/users');
}

export async function updateAdminPassword(id: string, formData: FormData) {
  const password = formData.get('password') as string;
  const hashedPassword = await bcrypt.hash(password, 10);

  await prisma.user.update({
    where: { id },
    data: {
      password: hashedPassword,
    },
  });

  revalidatePath('/admin/users');
}

export async function deleteAdmin(id: string) {
  const session = await encrypt({ expires: new Date(0) }); // placeholder check
  // Don't allow deleting self if we had current user id here, 
  // but for now simple delete
  await prisma.user.delete({ where: { id } });

  revalidatePath('/admin/users');
}

export async function createCategory(formData: FormData) {
  const title = formData.get('title') as string;
  const externalId = formData.get('externalId') as string;

  await prisma.category.create({
    data: {
      title,
      externalId: externalId || null,
      restaurantId: (await prisma.restaurant.findFirst())?.id || '',
    },
  });

  revalidatePath('/admin/categories');
  revalidatePath('/');
}

export async function updateCategory(id: string, formData: FormData) {
  const title = formData.get('title') as string;
  const externalId = formData.get('externalId') as string;

  await prisma.category.update({
    where: { id },
    data: {
      title,
      externalId: externalId || null,
    },
  });

  revalidatePath('/admin/categories');
  revalidatePath('/');
}

export async function deleteCategory(id: string) {
  // Optional: check if there are items first, or let prisma handles cascade if configured
  await prisma.item.deleteMany({ where: { categoryId: id } });
  await prisma.category.delete({ where: { id } });

  revalidatePath('/admin/categories');
  revalidatePath('/');
}

/* ────── Item Actions ────── */

export async function createItem(formData: FormData) {
  const name = formData.get('name') as string;
  const categoryId = formData.get('categoryId') as string;
  const ingredients = formData.get('ingredients') as string;
  const tasteProfile = formData.get('tasteProfile') as string;
  const grapeVariety = formData.get('grapeVariety') as string;
  const priceInput = formData.get('price') as string;

  let price;
  try {
    // Try to parse as JSON if it looks like an object, otherwise keep as string
    price = (priceInput.startsWith('{') || priceInput.startsWith('[')) 
      ? JSON.parse(priceInput) 
      : priceInput;
  } catch (e) {
    price = priceInput;
  }

  await prisma.item.create({
    data: {
      name,
      categoryId,
      ingredients: ingredients || null,
      tasteProfile: tasteProfile || null,
      grapeVariety: grapeVariety || null,
      price,
    },
  });

  revalidatePath('/admin/items');
  revalidatePath('/');
}

export async function updateItem(id: string, formData: FormData) {
  const name = formData.get('name') as string;
  const categoryId = formData.get('categoryId') as string;
  const ingredients = formData.get('ingredients') as string;
  const tasteProfile = formData.get('tasteProfile') as string;
  const grapeVariety = formData.get('grapeVariety') as string;
  const priceInput = formData.get('price') as string;

  let price;
  try {
    price = (priceInput.startsWith('{') || priceInput.startsWith('[')) 
      ? JSON.parse(priceInput) 
      : priceInput;
  } catch (e) {
    price = priceInput;
  }

  await prisma.item.update({
    where: { id },
    data: {
      name,
      categoryId,
      ingredients: ingredients || null,
      tasteProfile: tasteProfile || null,
      grapeVariety: grapeVariety || null,
      price,
    },
  });

  revalidatePath('/admin/items');
  revalidatePath('/');
}

export async function deleteItem(id: string) {
  await prisma.item.delete({ where: { id } });

  revalidatePath('/admin/items');
  revalidatePath('/');
}