'use server';

import { createAdminClient } from '@/lib/supabase/admin';
import { revalidatePath } from 'next/cache';
import { sendMail } from '@/utils/mail';

export async function getUsers() {
  const admin = createAdminClient();
  const { data: { users }, error } = await admin.auth.admin.listUsers();
  if (error) throw error;

  const { data: dbUsers, error: dbError } = await admin
    .from('users')
    .select('id, role, company_id, companies(id, name)');

  const userMap: Record<string, { role: string; company_id: string | null; company_name: string | null }> = {};
  if (!dbError && dbUsers) {
    dbUsers.forEach((u: any) => {
      userMap[u.id] = {
        role: u.role,
        company_id: u.company_id || null,
        company_name: Array.isArray(u.companies) ? u.companies[0]?.name || null : u.companies?.name || null,
      };
    });
  }

  return users.map((u) => ({
    ...u,
    role: userMap[u.id]?.role || 'partner',
    company_id: userMap[u.id]?.company_id || null,
    company_name: userMap[u.id]?.company_name || null,
  }));
}

export async function createUser(data: { email: string; password?: string; role?: 'admin' | 'partner'; email_confirm?: boolean; company_id?: string }) {
  const admin = createAdminClient();
  const { data: { user }, error } = await admin.auth.admin.createUser({
    email: data.email,
    password: data.password || Math.random().toString(36).slice(-10),
    email_confirm: data.email_confirm ?? true,
  });
  if (error) throw error;
  if (!user) throw new Error('Benutzer konnte nicht erstellt werden.');

  const role = data.role || 'partner';
  const { error: dbError } = await admin
    .from('users')
    .upsert({ id: user.id, role, company_id: data.company_id || null }, { onConflict: 'id' });
  if (dbError) throw dbError;

  revalidatePath('/admin/users');
  return user;
}

export async function deleteUser(id: string) {
  const admin = createAdminClient();
  const { error } = await admin.auth.admin.deleteUser(id);
  if (error) throw error;
  revalidatePath('/admin/users');
}

export async function updateUserRole(id: string, role: 'admin' | 'partner' | 'gesperrt') {
  const admin = createAdminClient();
  const { error } = await admin
    .from('users')
    .upsert({ id, role }, { onConflict: 'id' });
  if (error) throw error;
  revalidatePath('/admin/users');
}

export async function updateUserStatus(id: string, ban: boolean) {
  const admin = createAdminClient();
  const { error } = await admin.auth.admin.updateUserById(id, {
    ban_duration: ban ? '876000h' : '0h',
  });
  if (error) throw error;
  revalidatePath('/admin/users');
}

export async function resetPassword(email: string) {
  const admin = createAdminClient();
  const { data, error } = await admin.auth.admin.generateLink({
    type: 'recovery',
    email,
  });
  if (error) throw error;
  const linkData = data as any;
  // Extract token_hash from the generated link properties
  const tokenHash = linkData?.properties?.hashed_token;
  if (!tokenHash) throw new Error('Recovery token not generated');
  // Build link pointing to our own /auth/confirm route
  const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'https://staging.hephex.de';
  const resetLink = `${siteUrl}/auth/confirm?token_hash=${tokenHash}&type=recovery&next=/auth/update-password`;
  await sendMail({
    to: email,
    subject: 'Passwort zurücksetzen',
    text: `Klicken Sie auf den folgenden Link, um Ihr Passwort zurückzusetzen: ${resetLink}`,
    html: `<p>Klicken Sie <a href="${resetLink}">hier</a>, um Ihr Passwort zurückzusetzen.</p>`,
  });
}

export async function getPartners() {
  const admin = createAdminClient();
  const { data: { users }, error } = await admin.auth.admin.listUsers();
  if (error) throw error;

  const { data: dbUsers, error: dbError } = await admin
    .from('users')
    .select('id, role, company_id, companies(id, name)')
    .in('role', ['partner', 'gesperrt']);
  if (dbError) throw dbError;

  const userMap: Record<string, { role: string; company_id: string | null; company_name: string | null }> = {};
  dbUsers.forEach((u: any) => {
    userMap[u.id] = {
      role: u.role,
      company_id: u.company_id || null,
      company_name: Array.isArray(u.companies) ? u.companies[0]?.name || null : u.companies?.name || null,
    };
  });

  const partnerIds = new Set(dbUsers.map((u: any) => u.id));
  return users
    .filter((u) => partnerIds.has(u.id))
    .map((u) => ({
      ...u,
      role: userMap[u.id]?.role || 'partner',
      company_id: userMap[u.id]?.company_id || null,
      company_name: userMap[u.id]?.company_name || null,
    }));
}