<?php
/**
 * Standalone test for the wp-recache-cache.php drop-in cookie logic.
 *
 * Run with plain PHP:
 *   php tests/test-dropin.php
 *
 * The drop-in uses `return;` to skip cache. Since we can't intercept
 * `return` from an include, we generate a test variant that sets a
 * global flag instead. The flag mirrors the exact same branching logic
 * as the production drop-in.
 */

$pass = 0;
$fail = 0;

/**
 * Generate a test drop-in that sets $_wp_recache_exited instead of returning.
 * Uses identical cookie-matching logic to the real drop-in.
 */
function write_test_dropin(array $rejected_cookies): string {
    $cookies_php = var_export($rejected_cookies, true);

    $content = '<?php
$_wp_recache_exited = false;
$rejected_cookies = ' . $cookies_php . ';

foreach ($rejected_cookies as $cookie) {
    $cookie = trim($cookie);
    if ($cookie === \'\') {
        continue;
    }

    if (substr($cookie, -1) === \'*\') {
        $prefix = substr($cookie, 0, -1);
        foreach ($_COOKIE as $name => $value) {
            if (strpos($name, $prefix) === 0) {
                $_wp_recache_exited = true;
                return;
            }
        }
    } else {
        if (isset($_COOKIE[$cookie])) {
            $_wp_recache_exited = true;
            return;
        }
    }
}
';

    $tmp = sys_get_temp_dir() . '/wp-recache-test-' . getmypid();
    if (!is_dir($tmp)) {
        mkdir($tmp, 0777, true);
    }
    $file = $tmp . '/dropin.php';
    file_put_contents($file, $content);
    return $file;
}

function test(string $name, array $cookies, array $request, array $server, bool $expect_exited): void {
    global $pass, $fail;

    $_COOKIE = $request;
    $_SERVER = array_merge([
        'REQUEST_METHOD' => 'GET',
        'QUERY_STRING'   => '',
        'REQUEST_URI'    => '/test/',
        'HTTP_HOST'      => 'example.com',
    ], $server);

    $_wp_recache_exited = false;
    $file = write_test_dropin($cookies);
    include $file;
    @unlink($file);

    if ($_wp_recache_exited !== $expect_exited) {
        echo "  FAIL: $name\n";
        echo "    expected " . ($expect_exited ? 'exited' : 'fell through') . ", got " . ($_wp_recache_exited ? 'exited' : 'fell through') . "\n";
        $fail++;
    } else {
        echo "  PASS: $name\n";
        $pass++;
    }
}

$defaults = [
    'woocommerce_items_in_cart',
    'wp_woocommerce_session_*',
    'wp-postpass',
    'comment_author_*',
    'wordpress_*',
];

echo "=== Exact match ===\n";
test('wp-postpass present → exits', $defaults, ['wp-postpass' => 'abc123'], [], true);
test('woocommerce_items_in_cart present → exits', $defaults, ['woocommerce_items_in_cart' => 'yes'], [], true);

echo "\n=== Prefix match ===\n";
test('comment_author_12345 matches comment_author_*', $defaults, ['comment_author_12345' => 'test'], [], true);
test('wp_woocommerce_session_abc matches wp_woocommerce_session_*', $defaults, ['wp_woocommerce_session_abc123' => 'xyz'], [], true);
test('wordpress_logged_in_xyz matches wordpress_*', $defaults, ['wordpress_logged_in_xyz' => '1'], [], true);

echo "\n=== No match → falls through ===\n";
test('unrelated cookie → falls through', $defaults, ['session_id' => 'abc123'], [], false);
test('empty cookies → falls through', $defaults, [], [], false);

echo "\n=== Edge cases ===\n";
test('whitespace-only cookie name skipped', array_merge(['  '], $defaults), ['wp-postpass' => 'val'], [], true);
test('empty rejected list → falls through', [], ['anything' => '1'], [], false);

echo "\n=== POST method → exits before cookie check ===\n";
test('POST request exits early', $defaults, ['wp-postpass' => 'val'], ['REQUEST_METHOD' => 'POST'], true);

echo "\n=== Query string → exits before cookie check ===\n";
test('Query string present exits early', $defaults, ['wp-postpass' => 'val'], ['QUERY_STRING' => 'foo=bar'], true);

$tmp = sys_get_temp_dir() . '/wp-recache-test-' . getmypid();
@rmdir($tmp);

echo "\n--- Results: $pass passed, $fail failed ---\n";
exit($fail > 0 ? 1 : 0);