<?php
/**
 * Oribi Sync — Admin settings page.
 *
 * Registers the Settings → Oribi Sync page, handles saving,
 * and provides the "Sync Now" action.
 */

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

// ─── Register admin menu ──────────────────────────────────────────────────────
add_action( 'admin_menu', function () {
    add_options_page(
        'Oribi Sync',
        'Oribi Sync',
        'manage_options',
        'oribi-sync',
        'oribi_sync_settings_page'
    );
} );

// ─── Enqueue admin CSS on our page only ───────────────────────────────────────
add_action( 'admin_enqueue_scripts', function ( $hook ) {
    if ( $hook !== 'settings_page_oribi-sync' ) return;
    wp_enqueue_style( 'oribi-sync-admin', ORIBI_SYNC_URL . 'assets/admin.css', [], ORIBI_SYNC_VERSION );
} );

// ─── Handle form submissions ──────────────────────────────────────────────────
add_action( 'admin_post_oribi_sync_save_settings', function () {
    if ( ! current_user_can( 'manage_options' ) ) wp_die( 'Permission denied.' );
    check_admin_referer( 'oribi_sync_save_settings' );

    $repo   = sanitize_text_field( wp_unslash( $_POST['oribi_sync_repo'] ?? '' ) );
    $branch = sanitize_text_field( wp_unslash( $_POST['oribi_sync_branch'] ?? 'main' ) );
    $provider = sanitize_text_field( wp_unslash( $_POST['oribi_sync_provider'] ?? '' ) );
    $pat    = wp_unslash( $_POST['oribi_sync_pat'] ?? '' );

    update_option( 'oribi_sync_repo',     $repo,     'no' );
    update_option( 'oribi_sync_branch',   $branch,   'no' );
    update_option( 'oribi_sync_provider', $provider, 'no' );

    // Only update PAT if a new one was provided (non-empty)
    if ( ! empty( $pat ) ) {
        oribi_sync_save_pat( $pat );
    }

    wp_redirect( add_query_arg( 'oribi_sync_saved', '1', admin_url( 'options-general.php?page=oribi-sync' ) ) );
    exit;
} );

add_action( 'admin_post_oribi_sync_run', function () {
    if ( ! current_user_can( 'manage_options' ) ) wp_die( 'Permission denied.' );
    check_admin_referer( 'oribi_sync_run' );

    $result = oribi_sync_run();

    set_transient( 'oribi_sync_result', $result, 60 );

    wp_redirect( add_query_arg( 'oribi_sync_done', '1', admin_url( 'options-general.php?page=oribi-sync' ) ) );
    exit;
} );

add_action( 'admin_post_oribi_sync_dry_run', function () {
    if ( ! current_user_can( 'manage_options' ) ) wp_die( 'Permission denied.' );
    check_admin_referer( 'oribi_sync_dry_run' );

    $result = oribi_sync_run( true );

    set_transient( 'oribi_sync_result', $result, 60 );

    wp_redirect( add_query_arg( 'oribi_sync_done', 'dry', admin_url( 'options-general.php?page=oribi-sync' ) ) );
    exit;
} );

add_action( 'admin_post_oribi_sync_clear_pat', function () {
    if ( ! current_user_can( 'manage_options' ) ) wp_die( 'Permission denied.' );
    check_admin_referer( 'oribi_sync_clear_pat' );

    delete_option( 'oribi_sync_pat' );

    wp_redirect( add_query_arg( 'oribi_sync_saved', 'pat_cleared', admin_url( 'options-general.php?page=oribi-sync' ) ) );
    exit;
} );

// ─── Settings page renderer ──────────────────────────────────────────────────
function oribi_sync_settings_page() {
    if ( ! current_user_can( 'manage_options' ) ) return;

    $repo     = get_option( 'oribi_sync_repo', '' );
    $branch   = get_option( 'oribi_sync_branch', 'main' );
    $provider = get_option( 'oribi_sync_provider', '' );
    $has_pat  = ! empty( get_option( 'oribi_sync_pat', '' ) );
    $last_run = get_option( 'oribi_sync_last_run', '' );
    $log      = get_option( 'oribi_sync_log', [] );

    // Transient result (after sync / dry-run)
    $sync_result = get_transient( 'oribi_sync_result' );
    if ( $sync_result ) delete_transient( 'oribi_sync_result' );

    $saved = $_GET['oribi_sync_saved'] ?? '';
    $done  = $_GET['oribi_sync_done']  ?? '';
    ?>
    <div class="wrap oribi-sync-wrap">
        <h1>Oribi Sync</h1>

        <?php if ( $saved === '1' ): ?>
            <div class="notice notice-success is-dismissible"><p>Settings saved.</p></div>
        <?php elseif ( $saved === 'pat_cleared' ): ?>
            <div class="notice notice-warning is-dismissible"><p>PAT has been cleared.</p></div>
        <?php endif; ?>

        <?php if ( $sync_result ): ?>
            <div class="notice <?php echo $sync_result['ok'] ? 'notice-success' : 'notice-error'; ?>">
                <p>
                    <strong><?php echo $done === 'dry' ? '🔍 Dry-run results' : '✅ Sync complete'; ?></strong>
                </p>
                <ul style="list-style:disc; padding-left:1.5rem;">
                    <?php if ( ! empty( $sync_result['created'] ) ): ?>
                        <li>Created: <?php echo esc_html( implode( ', ', $sync_result['created'] ) ); ?></li>
                    <?php endif; ?>
                    <?php if ( ! empty( $sync_result['updated'] ) ): ?>
                        <li>Updated: <?php echo esc_html( implode( ', ', $sync_result['updated'] ) ); ?></li>
                    <?php endif; ?>
                    <?php if ( ! empty( $sync_result['trashed'] ) ): ?>
                        <li>Trashed: <?php echo esc_html( implode( ', ', $sync_result['trashed'] ) ); ?></li>
                    <?php endif; ?>
                    <?php if ( ! empty( $sync_result['skipped'] ) ): ?>
                        <li>Skipped: <?php echo esc_html( implode( ', ', $sync_result['skipped'] ) ); ?></li>
                    <?php endif; ?>
                    <?php if ( ! empty( $sync_result['errors'] ) ): ?>
                        <li style="color:#d63638;">Errors: <?php echo esc_html( implode( '; ', $sync_result['errors'] ) ); ?></li>
                    <?php endif; ?>
                </ul>
            </div>
        <?php endif; ?>

        <!-- Settings form -->
        <form method="post" action="<?php echo esc_url( admin_url( 'admin-post.php' ) ); ?>" class="oribi-sync-form">
            <input type="hidden" name="action" value="oribi_sync_save_settings" />
            <?php wp_nonce_field( 'oribi_sync_save_settings' ); ?>

            <table class="form-table" role="presentation">
                <tr>
                    <th scope="row"><label for="oribi_sync_repo">Repository URL</label></th>
                    <td>
                        <input type="url" name="oribi_sync_repo" id="oribi_sync_repo"
                               value="<?php echo esc_attr( $repo ); ?>"
                               class="regular-text" placeholder="https://github.com/owner/repo" />
                        <p class="description">HTTPS URL to the Git repository (any provider).</p>
                    </td>
                </tr>
                <tr>
                    <th scope="row"><label for="oribi_sync_provider">Provider</label></th>
                    <td>
                        <select name="oribi_sync_provider" id="oribi_sync_provider" class="regular-text">
                            <option value=""<?php selected( $provider, '' ); ?>>Auto-detect from URL</option>
                            <?php foreach ( oribi_sync_providers() as $key => $label ): ?>
                                <option value="<?php echo esc_attr( $key ); ?>"<?php selected( $provider, $key ); ?>>
                                    <?php echo esc_html( $label ); ?>
                                </option>
                            <?php endforeach; ?>
                        </select>
                        <p class="description">Select your Git hosting provider, or leave on auto-detect.</p>
                    </td>
                </tr>
                <tr>
                    <th scope="row"><label for="oribi_sync_branch">Branch</label></th>
                    <td>
                        <input type="text" name="oribi_sync_branch" id="oribi_sync_branch"
                               value="<?php echo esc_attr( $branch ); ?>"
                               class="regular-text" placeholder="main" />
                    </td>
                </tr>
                <tr>
                    <th scope="row"><label for="oribi_sync_pat">Personal Access Token</label></th>
                    <td>
                        <input type="password" name="oribi_sync_pat" id="oribi_sync_pat"
                               value="" class="regular-text"
                               placeholder="<?php echo $has_pat ? '••••••••  (saved — leave blank to keep)' : 'ghp_…'; ?>"
                               autocomplete="off" />
                        <p class="description">
                            Read token for your repo. Stored encrypted in the database.
                            <?php if ( $has_pat ): ?>
                                &nbsp;
                                <a href="<?php echo esc_url( wp_nonce_url( admin_url( 'admin-post.php?action=oribi_sync_clear_pat' ), 'oribi_sync_clear_pat' ) ); ?>"
                                   onclick="return confirm('Clear the stored PAT?');"
                                   style="color:#d63638;">Clear PAT</a>
                            <?php endif; ?>
                        </p>
                    </td>
                </tr>
            </table>

            <?php submit_button( 'Save Settings' ); ?>
        </form>

        <hr />

        <!-- Sync actions -->
        <h2>Sync Actions</h2>
        <p class="description">
            The plugin reads two folders from the repo: <code>pages/</code> (PHP or HTML files → WP pages)
            and <code>theme/</code> (theme style files → preview &amp; manual apply). Everything else is ignored.<br />
            PHP files are executed using the <code>oribi_b()</code> block helpers (requires Oribi Tech Setup plugin).
            HTML files are used as raw Gutenberg block markup.
        </p>
        <p>
            <a href="<?php echo esc_url( wp_nonce_url( admin_url( 'admin-post.php?action=oribi_sync_run' ), 'oribi_sync_run' ) ); ?>"
               class="button button-primary"
               onclick="return confirm('This will overwrite pages with content from the repository. Continue?');">
                🔄 Sync Now
            </a>

            <a href="<?php echo esc_url( wp_nonce_url( admin_url( 'admin-post.php?action=oribi_sync_dry_run' ), 'oribi_sync_dry_run' ) ); ?>"
               class="button">
                🔍 Dry Run
            </a>

            <a href="<?php echo esc_url( wp_nonce_url( admin_url( 'admin-post.php?action=oribi_sync_theme_preview' ), 'oribi_sync_theme_preview' ) ); ?>"
               class="button">
                🎨 Preview Theme Files
            </a>
        </p>

        <?php if ( $last_run ): ?>
            <p><strong>Last sync:</strong> <?php echo esc_html( $last_run ); ?></p>
        <?php endif; ?>

        <!-- Theme files preview -->
        <?php if ( isset( $_GET['oribi_sync_tab'] ) && $_GET['oribi_sync_tab'] === 'theme' ): ?>
            <hr />
            <h2>Theme Files Preview</h2>
            <?php oribi_sync_render_theme_preview(); ?>
        <?php endif; ?>

        <!-- Sync log -->
        <?php if ( ! empty( $log ) ): ?>
            <hr />
            <h2>Sync Log</h2>
            <table class="widefat fixed striped oribi-sync-log">
                <thead><tr>
                    <th style="width:160px;">Time</th>
                    <th>Created</th>
                    <th>Updated</th>
                    <th>Trashed</th>
                    <th>Skipped</th>
                    <th>Errors</th>
                </tr></thead>
                <tbody>
                <?php foreach ( array_slice( $log, 0, 10 ) as $entry ): ?>
                    <tr>
                        <td><?php echo esc_html( $entry['time'] ?? '—' ); ?></td>
                        <td><?php echo esc_html( implode( ', ', $entry['created'] ?? [] ) ?: '—' ); ?></td>
                        <td><?php echo esc_html( implode( ', ', $entry['updated'] ?? [] ) ?: '—' ); ?></td>
                        <td><?php echo esc_html( implode( ', ', $entry['trashed'] ?? [] ) ?: '—' ); ?></td>
                        <td><?php echo esc_html( implode( ', ', $entry['skipped'] ?? [] ) ?: '—' ); ?></td>
                        <td style="color:#d63638;"><?php echo esc_html( implode( '; ', $entry['errors'] ?? [] ) ?: '—' ); ?></td>
                    </tr>
                <?php endforeach; ?>
                </tbody>
            </table>
        <?php endif; ?>
    </div>
    <?php
}