<?php
/**
 * migrate_060_isms_doc_lifecycle.php — Ciclo di vita documentale ISMS (ISO 27001 cl.7.5).
 * Estende isms_documents (stati pubblicato/archiviato + tracciamento + riesame) + tabella versioni.
 * IDEMPOTENTE: ALTER guardati da information_schema, CREATE TABLE IF NOT EXISTS.
 */
if (PHP_SAPI !== 'cli') { http_response_code(403); exit("CLI only\n"); }
require_once __DIR__ . '/../config/env.php';
require_once __DIR__ . '/../config/database.php';
$pdo = Database::getInstance();
$db = $pdo->query('SELECT DATABASE()')->fetchColumn();
function col_exists(PDO $p,string $db,string $t,string $c):bool{
  $s=$p->prepare("SELECT 1 FROM information_schema.COLUMNS WHERE TABLE_SCHEMA=? AND TABLE_NAME=? AND COLUMN_NAME=?");
  $s->execute([$db,$t,$c]); return (bool)$s->fetchColumn();
}
function add_col(PDO $p,string $db,string $t,string $c,string $ddl):void{
  if(col_exists($p,$db,$t,$c)){ echo "  = $t.$c\n"; return; }
  $p->exec("ALTER TABLE `$t` ADD COLUMN $ddl"); echo "  + $t.$c\n";
}

echo "Migrazione 060 — ciclo di vita documenti ISMS (db=$db)\n";

/* 1) Estensione enum stato (idempotente: MODIFY) */
$pdo->exec("ALTER TABLE isms_documents MODIFY COLUMN status ENUM('draft','review','approved','published','archived') NOT NULL DEFAULT 'draft'");
echo "  enum status -> draft/review/approved/published/archived\n";

/* 2) Colonne di tracciamento del ciclo di vita */
add_col($pdo,$db,'isms_documents','reviewed_by',   "reviewed_by INT NULL");
add_col($pdo,$db,'isms_documents','reviewed_at',   "reviewed_at DATETIME NULL");
add_col($pdo,$db,'isms_documents','approved_by',   "approved_by INT NULL");
add_col($pdo,$db,'isms_documents','approved_at',   "approved_at DATETIME NULL");
add_col($pdo,$db,'isms_documents','published_by',  "published_by INT NULL");
add_col($pdo,$db,'isms_documents','published_at',  "published_at DATETIME NULL");
add_col($pdo,$db,'isms_documents','archived_at',   "archived_at DATETIME NULL");
add_col($pdo,$db,'isms_documents','review_note',   "review_note VARCHAR(500) NULL");
add_col($pdo,$db,'isms_documents','effective_date',"effective_date DATE NULL");
add_col($pdo,$db,'isms_documents','next_review_date',"next_review_date DATE NULL");

/* 3) Tabella storico versioni (snapshot ad ogni approvazione/pubblicazione) */
$pdo->exec("CREATE TABLE IF NOT EXISTS isms_document_versions (
  id INT AUTO_INCREMENT PRIMARY KEY,
  document_id INT NOT NULL,
  isms_model_id INT NOT NULL,
  organization_id INT NOT NULL,
  version VARCHAR(20) NOT NULL,
  status VARCHAR(20) NOT NULL,
  body_html LONGTEXT NULL,
  change_note VARCHAR(255) NULL,
  created_by INT NULL,
  created_at DATETIME NULL,
  INDEX idx_docver_doc (document_id),
  INDEX idx_docver_org (organization_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4");
echo "  tabella isms_document_versions OK\n";

echo "FATTO. Prossima mig=061.\n";