SIMON Master Console Rebuild

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guarded to /htdocs

/api/chat.php

<?php
declare(strict_types=1);

header('Content-Type: application/json; charset=utf-8');
header('Cache-Control: no-store');

function json_out(array $data, int $code=200): void {
  http_response_code($code);
  echo json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
  exit;
}

function read_json(): array {
  $raw = file_get_contents('php://input') ?: '';
  $j = json_decode($raw, true);
  return is_array($j) ? $j : [];
}

function get_client_key(): string {
  $h = getallheaders();
  if (!empty($h['X-OpenAI-Key'])) return trim((string)$h['X-OpenAI-Key']);
  if (!empty($h['x-openai-key'])) return trim((string)$h['x-openai-key']);
  return '';
}

function openai_key(): string {
  $k = get_client_key();
  if ($k !== '') return $k;
  $env = getenv('OPENAI_API_KEY') ?: '';
  return trim((string)$env);
}

function curl_json(string $url, array $body, string $apiKey): array {
  $ch = curl_init($url);
  $payload = json_encode($body, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
  curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
      'Authorization: Bearer ' . $apiKey,
      'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => $payload,
    CURLOPT_TIMEOUT => 60,
  ]);
  $resp = curl_exec($ch);
  $err  = curl_error($ch);
  $code = (int)curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
  curl_close($ch);

if ($resp === false) return [ 'ok'=>false, 'code'=>0, 'error'=>'cURL error: '.$err ];
  $j = json_decode($resp, true);
  if (!is_array($j)) return [ 'ok'=>false, 'code'=>$code, 'error'=>'Bad JSON from OpenAI', 'raw'=>mb_substr($resp,0,500) ];
  if ($code < 200 || $code >= 300) {
    $msg = $j['error']['message'] ?? ('OpenAI HTTP ' . $code);
    return [ 'ok'=>false, 'code'=>$code, 'error'=>(string)$msg ];
  }
  return [ 'ok'=>true, 'code'=>$code, 'data'=>$j ];
}

$apiKey = openai_key();
if ($apiKey === '') {
  json_out([
    'ok' => false,
    'error' => 'Server missing OPENAI_API_KEY (or client key disabled / not provided).'
  ], 500);
}

$in = read_json();
$q  = trim((string)($in['q'] ?? ''));
if ($q === '') json_out(['ok'=>false,'error'=>'Missing q'], 400);

$model = trim((string)($in['model'] ?? 'gpt-4o-mini'));
$personality = (string)($in['personality'] ?? 'Concise');
$focus = (string)($in['focus'] ?? 'General');
$memory = $in['memory'] ?? [];

$system = "You are SIMON — a highly conversational assistant. "
        . "Be warm, witty when appropriate, and helpful. "
        . "If the user selects a Focus Area, prioritize that domain. "
        . "If the user selects a Personality, match it. "
        . "Keep answers practical. Ask at most 1 follow-up question only if truly required.\n\n"
        . "Personality: {$personality}\n"
        . "Focus: {$focus}\n";

$contextLines = [];
if (is_array($memory)) {
  $tail = array_slice($memory, -12);
  foreach ($tail as $t) {
    if (!is_array($t)) continue;
    $mq = trim((string)($t['q'] ?? ''));
    $ma = trim((string)($t['a'] ?? ''));
    if ($mq !== '' && $ma !== '') {
      $contextLines[] = "User: {$mq}\nSIMON: {$ma}";
    }
  }
}
$context = $contextLines ? ("\nRecent context:\n" . implode("\n\n", $contextLines) . "\n") : "";

$body = [
  'model' => $model,
  'input' => [
    ['role'=>'system','content'=> $system . $context],
    ['role'=>'user','content'=> $q],
  ],
];

$r = curl_json('https://api.openai.com/v1/responses', $body, $apiKey);
if (!$r['ok']) {
  json_out(['ok'=>false,'error'=>$r['error']], 500);
}

$data = $r['data'];
// best-effort extraction for Responses API "output_text"
$answer = (string)($data['output_text'] ?? '');

if ($answer === '') {
  // fallback: walk output blocks
  $out = $data['output'] ?? [];
  if (is_array($out)) {
    foreach ($out as $o) {
      $content = $o['content'] ?? [];
      if (is_array($content)) {
        foreach ($content as $c) {
          if (($c['type'] ?? '') === 'output_text') {
            $answer .= (string)($c['text'] ?? '');
          }
        }
      }
    }
  }
}

json_out([
  'ok' => true,
  'answer' => trim($answer),
]);

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