<?php
/**
 * Plugin Name: THALIM Newsletter
 * Plugin URI: https://thalim.fr
 * Description: Compose and export monthly newsletter digests from site content
 * Version: 1.0.0
 * Author: THALIM Dev
 * Author URI: https://thalim.fr
 * License: GPL v2 or later
 * Text Domain: thalim-newsletter
 */

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

// Plugin constants
define('THALIM_NL_VERSION',    '1.0.0');
define('THALIM_NL_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('THALIM_NL_PLUGIN_URL', plugin_dir_url(__FILE__));

// Category IDs (verified in DB 2026-03-20)
define('THALIM_NL_CAT_APPELS',       8);
define('THALIM_NL_CAT_COLLOQUES',   10);
define('THALIM_NL_CAT_SEMINAIRES',  11);
define('THALIM_NL_CAT_COMMS',       13);
define('THALIM_NL_CAT_SOUTENANCES', 14);
define('THALIM_NL_CAT_OUVRAGES',    15);
define('THALIM_NL_CAT_ARTICLES',    16);
define('THALIM_NL_CAT_NEWSLETTER',  20);

// Pods IDs (verified in DB 2026-03-20)
define('THALIM_NL_POD_ID_POST',   8);
define('THALIM_NL_FIELD_ID_CAT', 16);

/**
 * Main plugin class — singleton
 */
class Thalim_Newsletter {

    private static $instance = null;

    public static function get_instance() {
        if (self::$instance === null) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    private function __construct() {
        $this->load_dependencies();
        $this->init_hooks();
    }

    private function load_dependencies() {
        require_once THALIM_NL_PLUGIN_DIR . 'includes/class-post-query.php';
        require_once THALIM_NL_PLUGIN_DIR . 'includes/class-html-exporter.php';
        require_once THALIM_NL_PLUGIN_DIR . 'includes/class-admin-page.php';
    }

    private function init_hooks() {
        add_action('admin_menu',             [$this, 'add_admin_menu']);
        add_action('admin_enqueue_scripts',  [$this, 'enqueue_assets']);
        add_action('wp_ajax_thalim_nl_load_month',  [new Thalim_NL_Admin_Page(), 'handle_ajax_load_month']);
        add_action('wp_ajax_thalim_nl_export_html',     [new Thalim_NL_Admin_Page(), 'handle_ajax_export_html']);
    }

    public function add_admin_menu() {
        add_management_page(
            'Newsletter',
            'Newsletter',
            'edit_others_posts',
            'thalim-newsletter',
            [$this, 'render_admin_page']
        );
    }

    public function enqueue_assets($hook) {
        if ($hook !== 'tools_page_thalim-newsletter') {
            return;
        }
        wp_enqueue_style(
            'thalim-newsletter-admin',
            THALIM_NL_PLUGIN_URL . 'assets/admin.css',
            [],
            THALIM_NL_VERSION
        );
        wp_enqueue_script(
            'thalim-newsletter-admin',
            THALIM_NL_PLUGIN_URL . 'assets/admin.js',
            ['jquery', 'jquery-ui-sortable'],
            THALIM_NL_VERSION,
            true
        );
        wp_localize_script('thalim-newsletter-admin', 'thalimNL', [
            'ajaxUrl' => admin_url('admin-ajax.php'),
            'nonce'   => wp_create_nonce('thalim_newsletter_ajax'),
        ]);
    }

    public function render_admin_page() {
        $page = new Thalim_NL_Admin_Page();
        $page->render();
    }
}

// Activation hook
register_activation_hook(__FILE__, function () {
    add_option('thalim_nl_version', THALIM_NL_VERSION);
});

// Initialize plugin
add_action('plugins_loaded', function () {
    Thalim_Newsletter::get_instance();
});