<?php
// /messages/api/delete_conversation.php
declare(strict_types=1);

require_once __DIR__ . '/../_bootstrap.php';
header('Content-Type: application/json; charset=utf-8');

if (!hash_equals($_SESSION['_csrf'] ?? '', $_POST['_csrf'] ?? '')) {
    json_response(['error' => 'csrf'], 419);
}

$role   = $GLOBALS['MESSAGES_CTX']['role']; // 'praticien' | 'client'
$meId   = $GLOBALS['MESSAGES_CTX']['me_id'];
$convId = (int)($_POST['conversation_id'] ?? 0);

if ($convId <= 0) {
    json_response(['error' => 'bad_params'], 400);
}

// Vérifie l'accès (participant)
$conv = assert_conversation_access($pdo, $convId, $role, $meId);

// Colonnes dépendant du rôle
$colDeleted = ($role === 'praticien') ? 'deleted_for_praticien' : 'deleted_for_client';
$colUnread  = ($role === 'praticien') ? 'p_unread' : 'c_unread';

try {
    $pdo->beginTransaction();

    // 1) Marquer la conversation supprimée "pour moi"
    $pdo->prepare("UPDATE conversations SET $colDeleted = 1 WHERE id = ?")
        ->execute([$convId]);

    // 2) Masquer tous ses messages "pour moi"
    $pdo->prepare("UPDATE messages SET $colDeleted = 1 WHERE conversation_id = ?")
        ->execute([$convId]);

    // 3) Réinitialiser mes non-lus sur cette conversation
    $pdo->prepare("UPDATE conversation_counters SET $colUnread = 0 WHERE conversation_id = ?")
        ->execute([$convId]);

    $pdo->commit();
} catch (Throwable $e) {
    if ($pdo->inTransaction()) { $pdo->rollBack(); }
    json_response(['error' => 'server_error'], 500);
}

json_response(['ok' => true]);