<?php

namespace DaftPlug\Rankify\Admin;

use DaftPlug\Rankify\Helpers\Utils;

if (!defined('ABSPATH')) {
  exit();
}

/**
 * "At a glance" widget on the WordPress dashboard.
 *
 * Answers the questions worth answering between visits to the plugin's own
 * screens: can search engines and AI assistants see this site, is anything
 * obviously broken, and what is the next thing to write. Everything that needs
 * a decision rather than a glance stays on the Overview page.
 *
 * Rendered server-side rather than through the plugin's REST endpoints — the
 * dashboard is not the plugin's screen, so it should not pull in the admin
 * bundle (a stylesheet scoped to #daftplugAdmin plus its JS) to print a few
 * numbers.
 */
class DashboardWidget
{
  const WIDGET_ID = 'rankify_seo';

  /** Short cache for the numbers SiteAudit does not already cache. */
  const GEO_CACHE_KEY = 'rankify_dashboard_geo';

  /**
   * Shared per-request registry of dashboard columns already taken by a
   * DaftPlug widget. Plain global rather than a filter because the plugins
   * ship independently and cannot rely on each other's code being present.
   */
  const COLUMN_CLAIM_KEY = 'daftplug_dashboard_columns_claimed';

  /**
   * Columns to try, best first. These map to the four postbox containers
   * WordPress renders on the dashboard.
   *
   * Every DaftPlug plugin wants top-left, so each takes the first column no
   * sibling has claimed yet: install one and it sits top-left; install more
   * and they line up along the top row rather than stacking down column one.
   */
  const WIDGET_COLUMNS = ['normal', 'side', 'column3', 'column4'];

  /** Column claimed for this request, set during registration. */
  private $context = null;

  public function __construct()
  {
    add_action('wp_dashboard_setup', [$this, 'registerWidget']);
    // Promotion runs in its own pass at the very end of the hook. Other
    // plugins push their widget to the top from this same hook at the default
    // priority, so whichever runs last wins.
    add_action('wp_dashboard_setup', [$this, 'promoteWidget'], PHP_INT_MAX);

    // Otherwise turning crawler or referral tracking on leaves the widget
    // insisting it is "Not tracked" for up to a quarter of an hour, which
    // reads as the setting not having worked.
    add_action('rankify_settings_update:after', [__CLASS__, 'flushCache']);
  }

  public static function flushCache()
  {
    delete_transient(self::GEO_CACHE_KEY);
  }

  public function registerWidget()
  {
    if (!current_user_can('manage_options')) {
      return;
    }

    wp_add_dashboard_widget(self::WIDGET_ID, $this->widgetTitle(), [$this, 'renderWidget'], null, null, $this->claimColumn());
  }

  /**
   * Take the leftmost dashboard column no sibling plugin has claimed yet.
   */
  private function claimColumn()
  {
    if ($this->context !== null) {
      return $this->context;
    }

    $claimed = isset($GLOBALS[self::COLUMN_CLAIM_KEY]) && is_array($GLOBALS[self::COLUMN_CLAIM_KEY]) ? $GLOBALS[self::COLUMN_CLAIM_KEY] : [];

    foreach (self::WIDGET_COLUMNS as $column) {
      if (!in_array($column, $claimed, true)) {
        $claimed[] = $column;
        $GLOBALS[self::COLUMN_CLAIM_KEY] = $claimed;
        $this->context = $column;

        return $column;
      }
    }

    // More DaftPlug widgets than the dashboard has columns: fall back to the
    // first and stack, which is what would have happened without any of this.
    $this->context = self::WIDGET_COLUMNS[0];

    return $this->context;
  }

  /**
   * Promote the widget to the top of the dashboard's left column.
   *
   * Only sets the default order. Once a user drags any dashboard box,
   * WordPress stores a per-user meta-box order and replays it at the 'sorted'
   * priority, ahead of 'core' — an explicit user choice should outrank ours.
   */
  public function promoteWidget()
  {
    global $wp_meta_boxes;

    if ($this->context === null || empty($wp_meta_boxes['dashboard'][$this->context]['core'][self::WIDGET_ID])) {
      return;
    }

    $boxes = $wp_meta_boxes['dashboard'][$this->context]['core'];
    $ours = [self::WIDGET_ID => $boxes[self::WIDGET_ID]];
    unset($boxes[self::WIDGET_ID]);

    $wp_meta_boxes['dashboard'][$this->context]['core'] = array_merge($ours, $boxes);
  }

  private function widgetTitle()
  {
    $title = esc_html__('Crownify', 'crownify');

    if (Utils::hasActivePro()) {
      $title = esc_html__('Crownify Pro', 'crownify');
    }

    return $title;
  }

  public function renderWidget()
  {
    $audit = SiteAudit::snapshot();
    $ai = SiteAudit::aiReadiness();
    $geo = $this->geoSummary();
    $attention = SiteAudit::needsAttention(3);
    // Built here, in the pure-PHP half of the method, rather than beside the
    // markup that uses them. Prettier hoists comments out of the short PHP
    // islands inside a template and copies them on every run, while a
    // translators note has to sit immediately above its gettext call or it
    // never reaches the POT. Resolving the strings up front keeps both true.
    //
    // Nothing in this comment may contain a PHP closing tag: the lexer acts
    // on one even inside a line comment, which silently ends PHP mode and
    // turns the rest of the method into output.
    /* translators: 1: number of AI crawlers allowed, 2: total number of AI crawlers. */
    $crawlerAccess = sprintf(__('%1$s of %2$s allowed', 'crownify'), number_format_i18n((int) $ai['totalCrawlers'] - (int) $ai['blockedCount']), number_format_i18n((int) $ai['totalCrawlers']));

    /* translators: %s: comma-separated crawler names. */
    $blockedCitation = empty($ai['blockedCitation']) ? '' : sprintf(__('%s cannot reach you, so this site cannot be cited in their answers.', 'crownify'), implode(', ', $ai['blockedCitation']));

    /* translators: %s: number of AI crawler requests in the last seven days. */
    $crawlerHits = sprintf(_n('%s request in 7 days', '%s requests in 7 days', (int) $geo['crawlerHits'], 'crownify'), number_format_i18n((int) $geo['crawlerHits']));

    /* translators: %s: name of the AI crawler that read the most pages. */
    $topBot = '' === $geo['topBot'] ? '' : sprintf(__('Most active: %s', 'crownify'), $geo['topBot']);

    $this->renderStyles();
    ?>
<div id="rankify-dashboard-widget">
  <?php $this->renderStatus(); ?>

  <div class="rankify-dw-stats">
    <div>
      <span class="rankify-dw-stat-value"><?php echo esc_html(number_format_i18n((int) $audit['indexable'])); ?></span>
      <span class="rankify-dw-stat-label"><?php esc_html_e('Indexable pages', 'crownify'); ?></span>
    </div>
    <div>
      <span class="rankify-dw-stat-value <?php echo $audit['missingDescription'] > 0 ? 'is-warn' : 'is-good'; ?>"><?php echo esc_html(number_format_i18n((int) $audit['missingDescription'])); ?></span>
      <span class="rankify-dw-stat-label"><?php esc_html_e('No description', 'crownify'); ?></span>
    </div>
    <div>
      <span class="rankify-dw-stat-value <?php echo $geo['broken'] > 0 ? 'is-warn' : 'is-good'; ?>"><?php echo esc_html(number_format_i18n((int) $geo['broken'])); ?></span>
      <span class="rankify-dw-stat-label"><?php esc_html_e('Broken URLs', 'crownify'); ?></span>
    </div>
  </div>

  <div class="rankify-dw-panel">
    <h4><?php esc_html_e('AI & answer engines', 'crownify'); ?></h4>

    <div class="rankify-dw-row">
      <span><?php esc_html_e('Crawler access', 'crownify'); ?></span>
      <strong class="<?php echo !empty($ai['blockedCitation']) ? 'is-warn' : 'is-good'; ?>">
        <?php echo esc_html($crawlerAccess); ?>
      </strong>
    </div>

    <?php if (!empty($ai['blockedCitation'])): ?>
    <p class="rankify-dw-warn">
      <?php echo esc_html($blockedCitation); ?>
    </p>
    <?php endif; ?>

    <div class="rankify-dw-row">
      <span><?php esc_html_e('Read by assistants', 'crownify'); ?></span>
      <?php if (!$geo['logging']): ?>
      <strong class="is-muted"><?php esc_html_e('Not tracked', 'crownify'); ?></strong>
      <?php else: ?>
      <strong class="<?php echo $geo['crawlerHits'] > 0 ? 'is-good' : 'is-warn'; ?>">
        <?php echo esc_html($crawlerHits); ?>
      </strong>
      <?php endif; ?>
    </div>

    <?php if ($geo['logging'] && '' !== $geo['topBot']): ?>
    <p class="rankify-dw-note">
      <?php echo esc_html($topBot); ?>
    </p>
    <?php endif; ?>

    <div class="rankify-dw-row">
      <span><?php esc_html_e('Visits from AI answers', 'crownify'); ?></span>
      <?php if (!Utils::hasActivePro()): ?>
      <strong class="is-muted"><?php esc_html_e('Pro', 'crownify'); ?></strong>
      <?php elseif (!$geo['referralsOn']): ?>
      <strong class="is-muted"><?php esc_html_e('Not tracked', 'crownify'); ?></strong>
      <?php else: ?>
      <strong class="<?php echo $geo['referralHits'] > 0 ? 'is-good' : 'is-muted'; ?>"><?php echo esc_html(number_format_i18n((int) $geo['referralHits'])); ?></strong>
      <?php endif; ?>
    </div>

    <?php if (!empty($geo['referralSources'])): ?>
    <p class="rankify-dw-note"><?php echo esc_html(implode(' · ', $geo['referralSources'])); ?></p>
    <?php endif; ?>
  </div>

  <?php if (!empty($attention)): ?>
  <div class="rankify-dw-panel">
    <h4><?php esc_html_e('Write these next', 'crownify'); ?></h4>
    <ul class="rankify-dw-list">
      <?php foreach ($attention as $rankifyItem): ?>
      <li>
        <?php if (!empty($rankifyItem['editUrl'])): ?>
        <a href="<?php echo esc_url($rankifyItem['editUrl']); ?>"><?php echo esc_html($rankifyItem['title']); ?></a>
        <?php else: ?>
        <span><?php echo esc_html($rankifyItem['title']); ?></span>
        <?php endif; ?>
      </li>
      <?php endforeach; ?>
    </ul>
    <p class="rankify-dw-note"><?php esc_html_e('Published with nothing for search engines or assistants to quote.', 'crownify'); ?></p>
  </div>
  <?php endif; ?>

  <?php if (!Utils::hasActivePro()): ?>
  <?php $this->renderUpgrade(); ?>
  <?php endif; ?>

  <div class="rankify-dw-actions">
    <a class="button button-primary" href="<?php echo esc_url(admin_url('admin.php?page=rankify-overview')); ?>">
      <?php esc_html_e('Open Crownify', 'crownify'); ?>
    </a>
    <a class="button" href="<?php echo esc_url(admin_url('admin.php?page=rankify-settings')); ?>">
      <?php esc_html_e('Settings', 'crownify'); ?>
    </a>
  </div>
</div>
<?php
  }

  /**
   * The GEO and redirect numbers, in one cached lump.
   *
   * The dashboard is loaded far more often than the plugin's own screens, and
   * by people who are not thinking about SEO at all, so it must not become the
   * reason wp-admin feels slow. SiteAudit already caches itself; these queries
   * are cached beside it on the same window.
   *
   * Everything touched here is feature-side or Pro-only and may genuinely not
   * exist in the free build, so each is guarded rather than assumed.
   */
  private function geoSummary()
  {
    $cached = get_transient(self::GEO_CACHE_KEY);

    if (is_array($cached)) {
      return $cached;
    }

    $summary = [
      'logging' => false,
      'crawlerHits' => 0,
      'topBot' => '',
      'referralsOn' => false,
      'referralHits' => 0,
      'referralSources' => [],
      'broken' => 0,
    ];

    if (class_exists('\DaftPlug\Rankify\Features\Geo\CrawlerLog') && 'on' === Utils::getSetting('aeoCitationTracking')) {
      $summary['logging'] = true;

      $totals = \DaftPlug\Rankify\Features\Geo\CrawlerLog::totals(7);
      $summary['crawlerHits'] = isset($totals['hits']) ? (int) $totals['hits'] : 0;

      $bots = \DaftPlug\Rankify\Features\Geo\CrawlerLog::byBot(7);

      if (!empty($bots)) {
        $first = reset($bots);
        $summary['topBot'] = isset($first['source']) ? (string) $first['source'] : '';
      }
    }

    if (class_exists('\DaftPlug\Rankify\Features\Geo\Referrals') && 'on' === Utils::getSetting('aiReferralTracking')) {
      $summary['referralsOn'] = true;

      // Thirty days rather than seven: a citation sends traffic in a trickle
      // over weeks, so a seven-day window on a small site reads as zero far
      // more often than it should.
      $sources = \DaftPlug\Rankify\Features\Geo\Referrals::bySource(30);
      $summary['referralHits'] = (int) array_sum(wp_list_pluck($sources, 'hits'));

      foreach (array_slice($sources, 0, 3) as $source) {
        $summary['referralSources'][] = $source['source'] . ' ' . number_format_i18n((int) $source['hits']);
      }
    }

    if (class_exists('\DaftPlug\Rankify\Features\Redirects\Log')) {
      $summary['broken'] = (int) \DaftPlug\Rankify\Features\Redirects\Log::count();
    }

    set_transient(self::GEO_CACHE_KEY, $summary, 15 * MINUTE_IN_SECONDS);

    return $summary;
  }

  /**
   * Headline row. "Discourage search engines" outranks everything else — a site
   * with it on is invisible no matter how well the rest is configured.
   */
  private function renderStatus()
  {
    if (!get_option('blog_public')) { ?>
<div class="rankify-dw-status is-bad">
  <span class="rankify-dw-dot"></span>
  <div>
    <strong><?php esc_html_e('Search engines are blocked', 'crownify'); ?></strong>
    <span><?php esc_html_e('Reading settings ask search engines not to index this site. Nothing will rank until that is turned off.', 'crownify'); ?></span>
  </div>
</div>
<?php return;} ?>
<div class="rankify-dw-status is-ok">
  <span class="rankify-dw-dot"></span>
  <div>
    <strong><?php esc_html_e('This site is open to search engines', 'crownify'); ?></strong>
    <span><?php esc_html_e('Crawlers and AI assistants are allowed to read and index your content.', 'crownify'); ?></span>
  </div>
</div>
<?php
  }

  /**
   * Upgrade prompt for free installs.
   *
   * URL comes from the SDK rather than being hardcoded, so it follows the
   * install's licence state and stays routed through the `pricing_url` filter
   * that Admin\UI already points at.
   */
  private function renderUpgrade()
  {
    $url = \DaftPlug\Rankify\rankify_pro()->get_upgrade_url(); ?>
<div class="rankify-dw-upgrade">
  <p>
    <strong><?php esc_html_e('Get found by AI, not just Google', 'crownify'); ?></strong>
    <?php esc_html_e('Answer-engine optimization, redirects, advanced schema and search insights.', 'crownify'); ?>
  </p>
  <a class="button button-primary" href="<?php echo esc_url($url); ?>">
    <?php echo esc_html(Utils::getUpgradeLabel()); ?>
  </a>
</div>
<?php
  }

  /**
   * Self-contained styles. The plugin's admin stylesheet is prefixed with
   * #daftplugAdmin by the build, so none of its utilities apply out here.
   */
  private function renderStyles()
  {
    static $printed = false;
    if ($printed) {
      return;
    }
    $printed = true;?>
<style id="rankify-dashboard-widget-styles">
#rankify-dashboard-widget .rankify-dw-status {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid #dcdcde;
  border-radius: 8px;
}

#rankify-dashboard-widget .rankify-dw-status strong {
  display: block;
  color: #1d2327;
  font-size: 13px;
}

#rankify-dashboard-widget .rankify-dw-status span:not(.rankify-dw-dot) {
  color: #646970;
  font-size: 12px;
  word-break: break-word;
}

#rankify-dashboard-widget .rankify-dw-dot {
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: 4px;
  border-radius: 50%;
  background: #c3c4c7;
}

#rankify-dashboard-widget .is-ok .rankify-dw-dot {
  background: #00cc66;
}

#rankify-dashboard-widget .is-warn .rankify-dw-dot {
  background: #ffaa33;
}

/* Blocked indexing is not a warning. It is the one setting that makes every
   other thing this widget reports irrelevant, so it gets the full red
   treatment rather than a dot the eye reads as "later". */
#rankify-dashboard-widget .is-bad {
  border-color: #f0b8b8;
  background: #fcf0f1;
}

#rankify-dashboard-widget .is-bad .rankify-dw-dot {
  background: #d63638;
}

#rankify-dashboard-widget .is-bad strong {
  color: #8a2424;
}

#rankify-dashboard-widget .is-busy .rankify-dw-dot {
  background: #155DFC;
  animation: rankify-dw-pulse 1.4s ease-in-out infinite;
}

@keyframes rankify-dw-pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: .25;
  }
}

#rankify-dashboard-widget .rankify-dw-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid #f0f0f1;
}

#rankify-dashboard-widget .rankify-dw-stat-value {
  display: block;
  font-size: 20px;
  font-weight: 600;
  color: #1d2327;
  line-height: 1.2;
}

#rankify-dashboard-widget .rankify-dw-stat-value.is-good {
  color: #007a4d;
}

#rankify-dashboard-widget .rankify-dw-stat-value.is-warn {
  color: #9a6700;
}

#rankify-dashboard-widget .rankify-dw-stat-label {
  font-size: 12px;
  color: #646970;
}

/* A panel rather than another bordered card: the dashboard already frames the
   widget, and a second border inside it reads as a separate box. */
#rankify-dashboard-widget .rankify-dw-panel {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid #f0f0f1;
}

#rankify-dashboard-widget .rankify-dw-panel h4 {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #787c82;
}

#rankify-dashboard-widget .rankify-dw-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 0;
  font-size: 13px;
  color: #50575e;
}

#rankify-dashboard-widget .rankify-dw-row + .rankify-dw-row {
  border-top: 1px solid #f6f7f7;
}

#rankify-dashboard-widget .rankify-dw-row strong {
  flex: 0 0 auto;
  font-size: 13px;
  color: #1d2327;
  text-align: right;
}

#rankify-dashboard-widget .rankify-dw-row strong.is-good {
  color: #007a4d;
}

#rankify-dashboard-widget .rankify-dw-row strong.is-warn {
  color: #9a6700;
}

#rankify-dashboard-widget .rankify-dw-row strong.is-muted {
  color: #8c8f94;
  font-weight: 400;
}

#rankify-dashboard-widget .rankify-dw-warn {
  margin: 6px 0 0;
  padding: 6px 8px;
  border-radius: 6px;
  background: #fdf3e3;
  color: #8a5a00;
  font-size: 12px;
  line-height: 1.5;
}

#rankify-dashboard-widget .rankify-dw-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

#rankify-dashboard-widget .rankify-dw-list li {
  margin: 0;
  padding: 5px 0;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#rankify-dashboard-widget .rankify-dw-list li + li {
  border-top: 1px solid #f6f7f7;
}

#rankify-dashboard-widget .rankify-dw-note {
  margin: 6px 0 0;
  color: #787c82;
  font-size: 12px;
}

#rankify-dashboard-widget .rankify-dw-upgrade {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid #ddd6fe;
  border-radius: 8px;
  background: #f5f3ff;
}

#rankify-dashboard-widget .rankify-dw-upgrade .button-primary {
  background: linear-gradient(to right, #7c3aed, #4f46e5);
  border-color: #6d28d9;
  color: #fff;
}

#rankify-dashboard-widget .rankify-dw-upgrade .button-primary:hover,
#rankify-dashboard-widget .rankify-dw-upgrade .button-primary:focus {
  background: linear-gradient(to right, #6d28d9, #4338ca);
  border-color: #5b21b6;
  color: #fff;
}

#rankify-dashboard-widget .rankify-dw-upgrade p {
  margin: 0;
  font-size: 12px;
  color: #50575e;
}

#rankify-dashboard-widget .rankify-dw-upgrade strong {
  display: block;
  color: #1d2327;
  font-size: 13px;
}

#rankify-dashboard-widget .rankify-dw-actions {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}
</style>
<?php
  }
}