<?php
// ai/config.php - OpenAI proxy configuration (workspace scope)
// Reads values from environment variables or executor/.env
// For Appwizzy platform compatibility

/**
 * Load environment variables from .env file if not already set
 * This ensures compatibility with both CLI and web environments
 */
function loadEnvIfNeeded() {
    // Check if required environment variables are missing
    $projectUuid = getenv('PROJECT_UUID');
    $projectId = getenv('PROJECT_ID');
    
    if (
        ($projectUuid === false || $projectUuid === null || $projectUuid === '') ||
        ($projectId === false || $projectId === null || $projectId === '')
    ) {
        $envPath = realpath(__DIR__ . '/../../.env'); // executor/.env
        if ($envPath && is_readable($envPath)) {
            $lines = @file($envPath, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES) ?: [];
            foreach ($lines as $line) {
                $line = trim($line);
                if ($line === '' || $line[0] === '#') {
                    continue;
                }
                if (!str_contains($line, '=')) {
                    continue;
                }
                [$key, $value] = array_map('trim', explode('=', $line, 2));
                if ($key === '') {
                    continue;
                }
                $value = trim($value, "\"' ");
                if (getenv($key) === false || getenv($key) === '') {
                    putenv("{$key}={$value}");
                }
            }
        }
    }
}

// Load environment variables if needed
loadEnvIfNeeded();

// Get configuration values
$projectUuid = getenv('PROJECT_UUID');
$projectId   = getenv('PROJECT_ID');

// Set defaults if not found
$projectUuid = ($projectUuid === false || $projectUuid === '') ? null : $projectUuid;
$projectId   = ($projectId === false || $projectId === '') ? null : $projectId;

// Base configuration
$baseUrl = 'https://flatlogic.com';
$responsesPath = $projectId ? "/projects/{$projectId}/ai-request" : null;

// Return configuration array
return [
    'base_url'       => $baseUrl,
    'responses_path' => $responsesPath,
    'project_id'     => $projectId,
    'project_uuid'   => $projectUuid,
    'project_header' => 'project-uuid',
    'default_model'  => 'gpt-5-mini',
    'timeout'        => 30,
    'verify_tls'     => true,
    
    // Additional settings for Appwizzy compatibility
    'debug'          => getenv('APP_ENV') === 'development' || getenv('APP_DEBUG') === 'true',
    'max_retries'    => 3,
    'retry_delay'    => 2,
    
    // Feature flags
    'features' => [
        'async_polling' => true,
        'json_response' => true,
        'streaming'     => false,
    ],
    
    // Cache settings
    'cache' => [
        'enabled' => getenv('AI_CACHE_ENABLED') === 'true',
        'ttl'     => 3600, // 1 hour
        'path'    => __DIR__ . '/../cache/ai-responses',
    ],
];