<?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__));

// Catégories : résolues par slug au chargement (les term_ids auto-incrémentés
// ne survivent pas à une réimportation de base). Fallback sur les IDs
// historiques (vérifiés en base 2026-03-20) si un slug est introuvable.
// Une seule requête SQL, mise en cache 1 jour (transient).
(function () {
    $cats = [
        'THALIM_NL_CAT_APPELS'      => ['appels-a-contribution',          8],
        'THALIM_NL_CAT_COLLOQUES'   => ['colloques-et-journees-detudes', 10],
        'THALIM_NL_CAT_SEMINAIRES'  => ['seminaires',                    11],
        'THALIM_NL_CAT_COMMS'       => ['communications',                13],
        'THALIM_NL_CAT_SOUTENANCES' => ['soutenances',                   14],
        'THALIM_NL_CAT_OUVRAGES'    => ['ouvrages',                      15],
        'THALIM_NL_CAT_ARTICLES'    => ['articles',                      16],
        'THALIM_NL_CAT_NEWSLETTER'  => ['newsletter',                    20],
    ];
    $by_slug = get_transient('thalim_nl_cat_ids');
    if (!is_array($by_slug)) {
        global $wpdb;
        $slugs        = array_column($cats, 0);
        $placeholders = implode(',', array_fill(0, count($slugs), '%s'));
        $rows = $wpdb->get_results($wpdb->prepare(
            "SELECT t.slug, t.term_id FROM {$wpdb->terms} t
             JOIN {$wpdb->term_taxonomy} tt ON tt.term_id = t.term_id
             WHERE tt.taxonomy = 'category' AND t.slug IN ($placeholders)",
            $slugs
        ));
        $by_slug = [];
        foreach ((array) $rows as $row) {
            $by_slug[$row->slug] = (int) $row->term_id;
        }
        set_transient('thalim_nl_cat_ids', $by_slug, DAY_IN_SECONDS);
    }
    foreach ($cats as $const => [$slug, $fallback]) {
        define($const, $by_slug[$slug] ?? $fallback);
    }
})();

/**
 * 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();
});