<?php
/**
 * fix_numeric_categories.php
 *
 * Renames 100 WordPress categories that have numeric names (K2 Autor field IDs)
 * to their proper author names from the Joomla K2 extra field mapping.
 *
 * When a named category already exists for the same author, merges both
 * (moves posts from numeric → named category, then deletes numeric).
 *
 * Usage: php fix_numeric_categories.php [--dry-run]
 */

$dry_run = in_array('--dry-run', $argv ?? []);

$db_host = 'wordpress-mysql';
$db_name = 'wordpress_db';
$db_user = 'wordpress_user';
$db_pass = 'wordpress_pass';

$pdo = new PDO("mysql:host=$db_host;dbname=$db_name;charset=utf8mb4", $db_user, $db_pass, [
    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
]);

echo "=== Fix Numeric Author Categories ===\n";
echo $dry_run ? "[DRY RUN]\n\n" : "[LIVE RUN]\n\n";

// -------------------------------------------------------------------------
// Mapping: numeric value → author name (from K2 extra field "Autor")
// -------------------------------------------------------------------------
$autor_map = [
    1 => "Fray Marcos",
    2 => "José Antonio Pagola",
    3 => "Enrique Martínez Lozano",
    4 => "José Enrique Galarreta",
    5 => "José Arregi",
    6 => "Eloy Roy",
    7 => "Dolores Aleixandre",
    9 => "Florentino Ulibarri",
    10 => "Rafael Calvo",
    11 => "Julián Mellado",
    12 => "Vicente Martínez",
    13 => "Matilde Gastalver",
    14 => "Koldo Aldai",
    15 => "Sandra Hojman",
    16 => "Leonardo Boff",
    17 => "José M. Castillo",
    18 => "Luís Alemán",
    19 => "Juan José Tamayo",
    20 => "José Ignacio González Faus",
    22 => "José Manuel Vidal",
    23 => "Isabel Gómez-Acebo",
    31 => "Faustino Vilabrille",
    32 => "Víctor Daniel Blanco",
    33 => "Nuevo Testamento",
    36 => "Gabriel Mª Otalora",
    38 => "Luís García Orso",
    40 => "María Teresa Sánchez Carmona",
    41 => "Emma Martínez Ocaña",
    45 => "Mari Patxi Ayerra",
    49 => "Jesús Bastante",
    52 => "J. A. Estrada",
    53 => "Rafael Díaz Arias",
    58 => "Susana Merino",
    69 => "Asociación de teólogos y teólogas Juan XXIII",
    73 => "José Ignacio Calleja",
    75 => "Autor desconocido",
    76 => "Gerardo Villar",
    79 => "José Sánchez Luque",
    83 => "Mari Paz López Santos",
    84 => "Patricia Paz",
    87 => "Pedro Casaldáliga",
    88 => "Foro «Curas de Madrid»",
    92 => "Xavier Pikaza",
    96 => "Benjamín Forcano",
    97 => "Ima Sanchís",
    108 => "Pedro M. Lamet",
    114 => "Juan G. Bedoya",
    115 => "Juan Masiá",
    123 => "Frei Betto",
    124 => "Juan Cejudo",
    125 => "Miguel Ángel Mesa",
    126 => "Carlos F. Barberá",
    127 => "Mariá Corbí",
    129 => "Rafael Fernando Navarro",
    149 => "José María Díez Alegría",
    174 => "Carmen Soto",
    175 => "Hans Küng",
    188 => "Fidel Aizpurúa",
    194 => "Pepcastelló",
    208 => "Juan Yzuel",
    234 => "Maite García Romero",
    263 => "Gonzalo Haya",
    288 => "Redes Cristianas",
    303 => "Víctor Codina",
    306 => "José María García-Mauriño",
    312 => "Patxi Loidi",
    321 => "Jesús Gil García",
    323 => "John P. Meier",
    325 => "Rogelio Cárdenas",
    329 => "Pablo Ordaz",
    345 => "Papa Francisco",
    347 => "Vicky Irigaray",
    357 => "Marco Antonio Velásquez Uribe",
    362 => "Fernando Bermúdez López",
    374 => "Pablo",
    375 => "José Luis Sicre",
    376 => "Miguel A. Munárriz Casajús",
    382 => "Santiago Agrelo",
    392 => "Felix Jiménez Tutor",
    396 => "José María Alvarez",
    399 => "Hechos",
    404 => "Bruno Álvarez",
    412 => "Luis Miguel Modino",
    418 => "Varios autores",
    435 => "Voces cristianas de Sevilla",
    437 => "Religión Digital",
    443 => "Francisco Bautista",
    444 => "Yolanda Chávez",
    449 => "Atrio",
    450 => "Carolina Abarca",
    465 => "Magdalena Bennasar",
    516 => "Eclesalia",
    520 => "Antonio Aradillas",
    529 => "Humanismo Sin credos",
    540 => "Juan Zapatero",
    557 => "Marifé Ramos González",
    566 => "Marta García",
    570 => "María Dolores López Guzmán",
    583 => "Inma Eibe",
    615 => "Íñigo García Blanco",
];

// -------------------------------------------------------------------------
// Fetch all numeric categories from WordPress
// -------------------------------------------------------------------------
$stmt = $pdo->query("
    SELECT t.term_id, t.name, t.slug, tt.count
    FROM wp_terms t
    JOIN wp_term_taxonomy tt ON t.term_id = tt.term_id
    WHERE tt.taxonomy = 'category' AND t.name REGEXP '^[0-9]+$'
    ORDER BY CAST(t.name AS UNSIGNED)
");
$numeric_cats = $stmt->fetchAll(PDO::FETCH_ASSOC);
echo "Numeric categories found: " . count($numeric_cats) . "\n\n";

$stats = ['renamed' => 0, 'merged' => 0, 'skipped' => 0, 'no_map' => 0];

foreach ($numeric_cats as $cat) {
    $num_val   = (int)$cat['name'];
    $term_id   = (int)$cat['term_id'];
    $post_count = (int)$cat['count'];

    if (!isset($autor_map[$num_val])) {
        echo "  [SKIP] No mapping for value $num_val (term_id=$term_id, $post_count posts)\n";
        $stats['no_map']++;
        continue;
    }

    $new_name = $autor_map[$num_val];

    // Check if a category with this name already exists
    $existing = $pdo->prepare("
        SELECT t.term_id, tt.count
        FROM wp_terms t
        JOIN wp_term_taxonomy tt ON t.term_id = tt.term_id
        WHERE tt.taxonomy = 'category' AND t.name = ?
        AND t.term_id != ?
    ");
    $existing->execute([$new_name, $term_id]);
    $existing_cat = $existing->fetch(PDO::FETCH_ASSOC);

    if ($existing_cat) {
        // MERGE: move posts from numeric category to the existing named category
        $target_term_id = (int)$existing_cat['term_id'];
        echo "  [MERGE] \"$num_val\" ($post_count posts) → \"$new_name\" (term_id=$target_term_id, existing {$existing_cat['count']} posts)\n";

        if (!$dry_run) {
            // Get term_taxonomy_id for both
            $tt_stmt = $pdo->prepare("SELECT term_taxonomy_id FROM wp_term_taxonomy WHERE term_id = ? AND taxonomy = 'category'");

            $tt_stmt->execute([$term_id]);
            $src_tt_id = (int)$tt_stmt->fetchColumn();

            $tt_stmt->execute([$target_term_id]);
            $dst_tt_id = (int)$tt_stmt->fetchColumn();

            // Move post relationships (avoiding duplicates)
            $pdo->prepare("
                UPDATE IGNORE wp_term_relationships
                SET term_taxonomy_id = ?
                WHERE term_taxonomy_id = ?
            ")->execute([$dst_tt_id, $src_tt_id]);

            // Delete remaining relationships for source (duplicates that weren't moved)
            $pdo->prepare("DELETE FROM wp_term_relationships WHERE term_taxonomy_id = ?")->execute([$src_tt_id]);

            // Update count on target
            $pdo->prepare("
                UPDATE wp_term_taxonomy SET count = (
                    SELECT COUNT(*) FROM wp_term_relationships WHERE term_taxonomy_id = ?
                ) WHERE term_taxonomy_id = ?
            ")->execute([$dst_tt_id, $dst_tt_id]);

            // Delete numeric category
            $pdo->prepare("DELETE FROM wp_term_taxonomy WHERE term_id = ? AND taxonomy = 'category'")->execute([$term_id]);
            $pdo->prepare("DELETE FROM wp_terms WHERE term_id = ?")->execute([$term_id]);
        }
        $stats['merged']++;

    } else {
        // RENAME: update name and slug
        $new_slug = sanitize_slug($new_name);
        echo "  [RENAME] \"$num_val\" → \"$new_name\" (term_id=$term_id, $post_count posts)\n";

        if (!$dry_run) {
            $pdo->prepare("UPDATE wp_terms SET name = ?, slug = ? WHERE term_id = ?")->execute([$new_name, $new_slug, $term_id]);
        }
        $stats['renamed']++;
    }
}

echo "\n=== Results ===\n";
echo "Renamed:  {$stats['renamed']}\n";
echo "Merged:   {$stats['merged']}\n";
echo "Skipped (no map): {$stats['no_map']}\n";
echo "\nDone.\n";

// -------------------------------------------------------------------------
function sanitize_slug(string $name): string {
    $slug = mb_strtolower($name, 'UTF-8');
    $slug = str_replace(
        ['á','é','í','ó','ú','ü','ñ','ã','â','à','ê','ô','ç','ú','ó','ä','ö'],
        ['a','e','i','o','u','u','n','a','a','a','e','o','c','u','o','a','o'],
        $slug
    );
    $slug = preg_replace('/[^a-z0-9\s-]/', '', $slug);
    $slug = preg_replace('/[\s]+/', '-', trim($slug));
    $slug = preg_replace('/-+/', '-', $slug);
    return trim($slug, '-');
}