<?php

require_once __DIR__ . '/encrypted_payload.php';

function json_success(mixed $data, int $status = 200): never {
    http_response_code($status);
    header('Content-Type: application/json; charset=UTF-8');
    echo json_encode(["ok" => true, "data" => $data]);
    exit;
}

function json_error(string $code, string $message, int $status = 400): never {
    http_response_code($status);
    header('Content-Type: application/json; charset=UTF-8');
    echo json_encode(["ok" => false, "error" => ["code" => $code, "message" => $message]]);
    exit;
}

function read_json_body(): array {
    $raw = file_get_contents('php://input');
    $data = json_decode($raw, true);
    if (!is_array($data)) {
        json_error('INVALID_BODY', 'Request body must be valid JSON', 400);
    }
    return $data;
}

function read_encrypted_json_body(string $tokenHex): array {
    $outer = read_json_body();
    if (empty($outer['encrypted'])) {
        json_error('ENCRYPTION_REQUIRED', 'Sensitive requests must send an encrypted payload', 400);
    }
    try {
        $plain = qdb_decrypt_sensitive_envelope($outer, $tokenHex);
    } catch (Throwable $e) {
        error_log('decrypt body failed: ' . $e->getMessage());
        json_error('DECRYPT_FAILED', 'Could not decrypt request payload', 400);
    }
    $data = json_decode($plain, true);
    if (!is_array($data)) {
        json_error('INVALID_BODY', 'Decrypted body must be valid JSON object', 400);
    }
    return $data;
}

function json_success_sensitive(mixed $data, string $tokenHex, int $status = 200): never {
    $plain = json_encode($data, JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR);
    json_success(qdb_sensitive_envelope($plain, $tokenHex), $status);
}