<?php
require_once __DIR__ . '/db/config.php';
require_once __DIR__ . '/includes/session.php';

$errors = [];

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

    if (empty($email) || !filter_var($email, FILTER_VALIDATE_EMAIL)) {
        $errors[] = 'A valid email is required.';
    }
    if (empty($password)) {
        $errors[] = 'Password is required.';
    }

    if (empty($errors)) {
        $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'];
            header('Location: /dashboard.php');
            exit;
        } else {
            $errors[] = 'Invalid email or password.';
        }
    }
    $_SESSION['login_errors'] = $errors;
    header('Location: /index.php#loginModal');
    exit;
}

// This script does not render HTML. It only processes the form.
header('Location: /index.php');
exit;