<?php
/**
 * Admin class for Infinico Image Optimizer
 */

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

/**
 * Admin functionality class
 */
class IWAC_Admin {

    /**
     * Settings instance
     */
    private $settings;

    /**
     * Converter instance
     */
    private $converter;

    /**
     * Screen hooks returned by WordPress for this plugin's menu pages.
     */
    private $page_hooks = array();

    /**
     * Constructor
     */
    public function __construct($settings = null, $converter = null) {
        $this->settings = $settings ?: new IWAC_Settings();
        $this->converter = $converter ?: new IWAC_Converter();

        add_action('admin_menu', array($this, 'add_admin_menu'));
        add_action('admin_enqueue_scripts', array($this, 'enqueue_scripts'));
    }

    /**
     * Add admin menu
     */
    public function add_admin_menu() {
        $this->page_hooks['dashboard'] = add_menu_page(
            __('Infinico Image Optimizer', 'infinico-image-optimizer'),
            __('Infinico Optimizer', 'infinico-image-optimizer'),
            'manage_options',
            'infinico-image-optimizer',
            array($this, 'admin_page'),
            'dashicons-images-alt2',
            30
        );

        add_submenu_page(
            'infinico-image-optimizer',
            __('Dashboard', 'infinico-image-optimizer'),
            __('Dashboard', 'infinico-image-optimizer'),
            'manage_options',
            'infinico-image-optimizer',
            array($this, 'admin_page')
        );

        $this->page_hooks['settings'] = add_submenu_page(
            'infinico-image-optimizer',
            __('Settings', 'infinico-image-optimizer'),
            __('Settings', 'infinico-image-optimizer'),
            'manage_options',
            'infinico-image-optimizer-settings',
            array($this, 'settings_page')
        );

        $this->page_hooks['bulk'] = add_submenu_page(
            'infinico-image-optimizer',
            __('Bulk Conversion', 'infinico-image-optimizer'),
            __('Bulk Conversion', 'infinico-image-optimizer'),
            'manage_options',
            'infinico-image-optimizer-bulk',
            array($this, 'bulk_conversion_page')
        );

        $this->page_hooks['media'] = add_submenu_page(
            'infinico-image-optimizer',
            __('Media Library', 'infinico-image-optimizer'),
            __('Media Library', 'infinico-image-optimizer'),
            'manage_options',
            'infinico-image-optimizer-media',
            array($this, 'media_list_page')
        );

        $this->page_hooks['logs'] = add_submenu_page(
            'infinico-image-optimizer',
            __('Logs', 'infinico-image-optimizer'),
            __('Logs', 'infinico-image-optimizer'),
            'manage_options',
            'infinico-image-optimizer-logs',
            array($this, 'logs_page')
        );
    }

    /**
     * Enqueue scripts and styles
     */
    public function enqueue_scripts($hook) {
        $page = array_search($hook, $this->page_hooks, true);
        if (false === $page) {
            return;
        }

        if ('dashboard' !== $page && empty($this->converter->get_supported_output_formats())) {
            add_action('admin_notices', array($this, 'requirements_notice'));
        }

        wp_enqueue_style(
            'iwac-admin-styles',
            IWAC_PLUGIN_URL . 'assets/css/admin-styles.css',
            array(),
            IWAC_VERSION
        );

        wp_enqueue_script(
            'iwac-admin-scripts',
            IWAC_PLUGIN_URL . 'assets/js/admin-scripts.js',
            array('jquery'),
            IWAC_VERSION,
            true
        );

        if (in_array($page, array('dashboard', 'bulk', 'media'), true)) {
            wp_enqueue_script(
                'iwac-converter-scripts',
                IWAC_PLUGIN_URL . 'assets/js/converter-scripts.js',
                array('jquery', 'iwac-admin-scripts'),
                IWAC_VERSION,
                true
            );
        }

        wp_localize_script('iwac-admin-scripts', 'iwac_ajax', array(
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('iwac_ajax_nonce'),
            'settings' => $this->settings->get_settings(),
            'urls' => array(
                'dashboard' => admin_url('admin.php?page=infinico-image-optimizer'),
                'settings'  => admin_url('admin.php?page=infinico-image-optimizer-settings'),
                'bulk'      => admin_url('admin.php?page=infinico-image-optimizer-bulk'),
                'media'     => admin_url('admin.php?page=infinico-image-optimizer-media'),
                'logs'      => admin_url('admin.php?page=infinico-image-optimizer-logs'),
                'readme'    => IWAC_PLUGIN_URL . 'README.md',
            ),
            'defaults' => array(
                'default_format'    => 'webp',
                'webp_quality'      => 80,
                'avif_quality'      => 70,
                'convert_on_upload' => 0,
                'keep_original'     => 1,
                'bulk_batch_size'   => 5,
            ),
            'strings' => array(
                'converting' => __('Converting...', 'infinico-image-optimizer'),
                'converted' => __('Converted', 'infinico-image-optimizer'),
                'convert_selected' => __('Convert Selected', 'infinico-image-optimizer'),
                'convert_to_format' => /* translators: Image format, such as WebP or AVIF. */ __('Convert to %s', 'infinico-image-optimizer'),
                'please_select_images' => __('Please select images to convert.', 'infinico-image-optimizer'),
                'please_choose_action' => __('Please choose a bulk action first.', 'infinico-image-optimizer'),
                'ajax_error' => __('AJAX error occurred.', 'infinico-image-optimizer'),
                'confirm_bulk' => __('Are you sure you want to convert all selected images?', 'infinico-image-optimizer'),
                'conversion_completed' => __('Conversion completed!', 'infinico-image-optimizer'),
                'images_converted' => __('images converted', 'infinico-image-optimizer'),
                'reset_confirm' => __('Reset all settings fields back to default values?', 'infinico-image-optimizer'),
                'info_text' => __('Infinico Image Optimizer lets you convert media library images to WebP and AVIF, review logs, and manage optimization settings from one dashboard.', 'infinico-image-optimizer'),
            ),
        ));

        if ('logs' === $page) {
            wp_enqueue_script(
                'iwac-logs-viewer',
                IWAC_PLUGIN_URL . 'assets/js/logs-viewer.js',
                array('jquery'),
                IWAC_VERSION,
                true
            );
        }
    }

    /**
     * Explain missing image support on the plugin's own screens.
     */
    public function requirements_notice() {
        echo '<div class="notice notice-warning"><p>';
        esc_html_e('Image conversion requires GD or Imagick with WebP or AVIF support. Ask your hosting provider to enable a supported image format.', 'infinico-image-optimizer');
        echo '</p></div>';
    }

    /**
     * Admin dashboard page
     */
    public function admin_page() {
        if (!current_user_can('manage_options')) {
            wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'infinico-image-optimizer'));
        }

        include IWAC_PLUGIN_DIR . 'templates/admin-dashboard.php';
    }

    /**
     * Settings page
     */
    public function settings_page() {
        if (!current_user_can('manage_options')) {
            wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'infinico-image-optimizer'));
        }

        include IWAC_PLUGIN_DIR . 'templates/settings-page.php';
    }

    /**
     * Bulk conversion page
     */
    public function bulk_conversion_page() {
        if (!current_user_can('manage_options')) {
            wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'infinico-image-optimizer'));
        }

        include IWAC_PLUGIN_DIR . 'templates/bulk-conversion.php';
    }

    /**
     * Media list page
     */
    public function media_list_page() {
        if (!current_user_can('manage_options')) {
            wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'infinico-image-optimizer'));
        }

        include IWAC_PLUGIN_DIR . 'templates/media-list.php';
    }

    /**
     * Logs page
     */
    public function logs_page() {
        if (!current_user_can('manage_options')) {
            wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'infinico-image-optimizer'));
        }

        include IWAC_PLUGIN_DIR . 'templates/logs.php';
    }

    /**
     * Add actions to media library rows
     */
    public function add_media_actions($actions, $post) {
        if ($post->post_type !== 'attachment' || !wp_attachment_is_image($post->ID)) {
            return $actions;
        }

        $file_path = get_attached_file($post->ID);
        $extension = $file_path ? strtolower(pathinfo($file_path, PATHINFO_EXTENSION)) : '';
        if (! in_array($extension, $this->converter->get_supported_input_formats(), true)) {
            return $actions;
        }

        $supported_formats = $this->converter->get_supported_output_formats();

        if (empty($supported_formats)) {
            return $actions;
        }

        $conversion_status = $this->converter->get_conversion_status($post->ID);

        foreach ($supported_formats as $format) {
            if (!isset($conversion_status[$format])) {
                $actions['convert_to_' . $format] = sprintf(
                    '<a href="#" class="iwac-convert-single" data-id="%d" data-format="%s">%s</a>',
                    $post->ID,
                    esc_attr($format),
                    esc_html(sprintf(/* translators: Image format, such as WebP or AVIF. */ __('Convert to %s', 'infinico-image-optimizer'), strtoupper($format)))
                );
            } else {
                $actions['convert_to_' . $format] = sprintf(
                    '<span class="iwac-already-converted">%s (%s)</span>',
                    esc_html(sprintf(/* translators: Image format, such as WebP or AVIF. */ __('Converted to %s', 'infinico-image-optimizer'), strtoupper($format))),
                    esc_html(date_i18n(get_option('date_format'), $conversion_status[$format]['converted_at']))
                );
            }
        }

        return $actions;
    }

    /**
     * Get images for dashboard
     */
    public function get_images_for_dashboard($page = 1, $per_page = 20) {
        $args = array(
            'post_type' => 'attachment',
            'post_mime_type' => 'image',
            'posts_per_page' => $per_page,
            'paged' => $page,
            'post_status' => 'inherit',
        );

        $query = new WP_Query($args);
        $images = array();

        foreach ($query->posts as $post) {
            $metadata = wp_get_attachment_metadata($post->ID);
            $conversion_status = $this->converter->get_conversion_status($post->ID);

            $size_bytes = 0;
            $file_path = get_attached_file($post->ID);
            $filename = $file_path ? basename($file_path) : $post->post_title;
            $source_extension = $file_path ? strtolower(pathinfo($file_path, PATHINFO_EXTENSION)) : '';
            $is_convertible_source = in_array($source_extension, $this->converter->get_supported_input_formats(), true);
            $is_next_gen_source = in_array($source_extension, array('webp', 'avif'), true) && $file_path && is_file($file_path) && filesize($file_path) > 0 && wp_getimagesize($file_path);

            if (isset($metadata['filesize'])) {
                $size_bytes = (int) $metadata['filesize'];
            } elseif ($file_path && file_exists($file_path)) {
                $size_bytes = filesize($file_path);
            }

            if ($conversion_status) {
                $primary_conversion = reset($conversion_status);
                $size_bytes = (int) $primary_conversion['original_size'];
            }

            $images[] = array(
                'id' => $post->ID,
                'title' => $post->post_title,
                'url' => wp_get_attachment_url($post->ID),
                'edit_url' => get_edit_post_link($post->ID, ''),
                'filename' => $filename,
                'uploaded_label' => sprintf(
                    /* translators: %s is a human-readable relative time. */
                    /* translators: Number of images. */ __('Uploaded: %s ago', 'infinico-image-optimizer'),
                    human_time_diff(get_post_time('U', true, $post), current_time('timestamp', true))
                ),
                'size' => $size_bytes ? size_format($size_bytes) : '',
                'size_bytes' => $size_bytes,
                'dimensions' => isset($metadata['width']) && isset($metadata['height']) ? $metadata['width'] . 'x' . $metadata['height'] : '',
                'conversions' => $conversion_status,
                'source_extension' => $source_extension,
                'is_convertible_source' => $is_convertible_source,
                'is_next_gen_source' => $is_next_gen_source,
            );
        }

        return array(
            'images' => $images,
            'total' => $query->found_posts,
            'pages' => $query->max_num_pages,
        );
    }
}