<?php
/*
 * header.php
 *
 * Shared page header renderer for logged-in application pages.
 */

require_once __DIR__ . '/Template.php';

function app_header_h($s)
{
    return RacketSandboxTemplate::escape($s);
}

function render_app_header($options)
{
    echo app_header_html($options);
}

function app_header_html($options)
{
    $title = (string)($options['title'] ?? '');
    $navItems = $options['nav_items'] ?? array();
    $user = $options['user'] ?? null;
    $userPrefix = (string)($options['user_prefix'] ?? '');
    $adminLabel = (string)($options['admin_label'] ?? 'admin');
    $languageLabel = (string)($options['language_label'] ?? 'Language');
    $language = (string)($options['language'] ?? 'en');
    $languages = $options['languages'] ?? array();
    $languageAction = (string)($options['language_action'] ?? '/');
    $languageHidden = $options['language_hidden'] ?? array();
    $logoutAction = (string)($options['logout_action'] ?? '');
    $logoutLabel = (string)($options['logout_label'] ?? '');
    $message = (string)($options['message'] ?? '');
    $error = (string)($options['error'] ?? '');

    return RacketSandboxTemplate::renderFile('app-header.html', array(
        'title' => $title,
        'nav_html' => app_header_nav_html($navItems),
        'logout_html' => app_header_logout_html($logoutAction, $logoutLabel),
        'user_html' => app_header_user_html($user, $userPrefix, $adminLabel),
        'language_html' => app_header_language_html($languageLabel, $language, $languages, $languageAction, $languageHidden),
        'message_html' => app_header_status_html('message', $message),
        'error_html' => app_header_status_html('error', $error),
    ));
}

function app_header_status_html($class, $message)
{
    if ($message === '') {
        return '';
    }

    return RacketSandboxTemplate::renderFile('partials/message.html', array(
        'class' => $class,
        'message' => $message,
    ));
}

function app_header_nav_html($navItems)
{
    $html = '';

    foreach ($navItems as $item) {
        if (!empty($item['separator_before'])) {
            $html .= RacketSandboxTemplate::renderFile('partials/header-separator.html', array()) . "\n";
        }

        if (!empty($item['active'])) {
            $html .= RacketSandboxTemplate::renderFile('partials/header-nav-active.html', array(
                'label' => $item['label'] ?? '',
            )) . "\n";
            continue;
        }

        $html .= RacketSandboxTemplate::renderFile('partials/header-nav-link.html', array(
            'url' => $item['url'] ?? '#',
            'label' => $item['label'] ?? '',
        )) . "\n";
    }

    return $html;
}

function app_header_logout_html($logoutAction, $logoutLabel)
{
    if ($logoutAction === '' || $logoutLabel === '') {
        return '';
    }

    return RacketSandboxTemplate::renderFile('partials/header-logout.html', array(
        'logout_action' => $logoutAction,
        'logout_label' => $logoutLabel,
    )) . "\n";
}

function app_header_user_html($user, $userPrefix, $adminLabel)
{
    if ($user === null) {
        return '';
    }

    $adminHtml = '';

    if ($user->isAdmin()) {
        $adminHtml = RacketSandboxTemplate::renderFile('partials/header-admin-badge.html', array(
            'admin_label' => $adminLabel,
        ));
    }

    return RacketSandboxTemplate::renderFile('partials/header-user.html', array(
        'user_prefix' => $userPrefix,
        'display_name' => $user->displayName(),
        'admin_html' => $adminHtml,
    )) . "\n";
}

function app_header_language_html($languageLabel, $language, $languages, $languageAction, $languageHidden)
{
    $hiddenInputsHtml = '';

    foreach ($languageHidden as $name => $value) {
        $hiddenInputsHtml .= RacketSandboxTemplate::renderFile('partials/header-hidden-input.html', array(
            'name' => $name,
            'value' => $value,
        )) . "\n";
    }

    $languageOptionsHtml = '';

    foreach ($languages as $lang => $label) {
        $selected = $lang === $language ? ' selected' : '';
        $languageOptionsHtml .= RacketSandboxTemplate::renderFile('partials/select-option.html', array(
            'value' => $lang,
            'selected' => $selected,
            'label' => $label,
        )) . "\n";
    }

    return RacketSandboxTemplate::renderFile('partials/header-language.html', array(
        'language_action' => $languageAction,
        'hidden_inputs_html' => $hiddenInputsHtml,
        'language_label' => $languageLabel,
        'language_options_html' => $languageOptionsHtml,
    )) . "\n";
}