<?php

/**
 * Script de migration : inverse la relation User→Projects en Project→Users.
 *
 * Pour chaque user (non-admin) ayant un champ projects non vide,
 * ajoute ce user dans le champ `users` du projet correspondant.
 *
 * Idempotent : pas de doublons si exécuté plusieurs fois.
 * À supprimer après migration.
 *
 * Usage: POST /migrate-user-projects.json
 */

return [
  'pattern' => 'migrate-user-projects.json',
  'method' => 'POST',
  'action' => function () {
    $user = kirby()->user();

    if (!$user || $user->role()->id() !== 'admin') {
      return [
        'status' => 'error',
        'message' => 'Cette action nécessite les droits administrateur.'
      ];
    }

    $migrated = [];
    $errors = [];

    $nonAdminUsers = kirby()->users()->filter(fn($u) => $u->role()->id() !== 'admin');

    foreach ($nonAdminUsers as $u) {
      if (!$u->projects()->exists() || $u->projects()->isEmpty()) {
        continue;
      }

      $userProjects = $u->projects()->toPages();

      foreach ($userProjects as $project) {
        try {
          $currentUsers = $project->users()->yaml();

          $userUuid = $u->uuid()->toString();

          if (in_array($userUuid, $currentUsers)) {
            continue;
          }

          $currentUsers[] = $userUuid;
          $project->update(['users' => $currentUsers]);

          $migrated[] = [
            'user' => $u->name()->value(),
            'email' => $u->email(),
            'project' => $project->title()->value(),
          ];
        } catch (\Throwable $th) {
          $errors[] = [
            'user' => $u->email(),
            'project' => $project->title()->value(),
            'error' => $th->getMessage()
          ];
        }
      }
    }

    return [
      'status' => 'success',
      'message' => count($migrated) . ' assignations migrées.',
      'migrated' => $migrated,
      'errors' => $errors
    ];
  }
];