<?php
session_start();
require_once __DIR__ . '/db/config.php';

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $email = $_POST['email'] ?? '';
    $password = $_POST['password'] ?? '';

    if (empty($email) || empty($password)) {
        header('Location: index.php?error=Please fill in all fields');
        exit;
    }

    try {
        $pdo = db();
        $stmt = $pdo->prepare('SELECT * FROM users WHERE email = ?');
        $stmt->execute([$email]);
        $user = $stmt->fetch();

        if ($user && password_verify($password, $user['password'])) {
            $_SESSION['user_id'] = $user['id'];
            $_SESSION['user_name'] = $user['name'];
            $_SESSION['user_role'] = $user['role'];
            header('Location: dashboard.php');
            exit;
        } else {
            header('Location: index.php?error=Invalid email or password');
            exit;
        }
    } catch (PDOException $e) {
        // In a real app, log this error instead of showing it to the user
        die('Database error: ' . $e->getMessage());
    }
}