<?php
require_once("/opt/wevads/config/credentials.php");
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

$db_config = [
    'host' => 'localhost',
    'dbname' => 'wevads',
    'user' => 'admin',
    'password' => WEVADS_DB_PASS
];

try {
    $pdo = new PDO(
        "pgsql:host={$db_config['host']};dbname={$db_config['dbname']}",
        $db_config['user'],
        $db_config['password'],
        [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]
    );
    
    $pdo->exec("SET search_path TO admin, public;");
    
    $action = $_GET['action'] ?? 'overview';
    
    switch ($action) {
        case 'overview':
            // Données de performance
            $throughput = $pdo->query("
                SELECT 
                    flow_type,
                    SUM(throughput_hour) as total_throughput,
                    COUNT(*) as flow_count
                FROM admin.bpms_flows
                GROUP BY flow_type
            ")->fetchAll(PDO::FETCH_ASSOC);
            
            // Méthodes d'envoi
            $methods = $pdo->query("
                SELECT 
                    COUNT(*) as config_count,
                    ROUND(AVG(inbox_rate), 2) as avg_inbox_rate
                FROM admin.brain_send_configs
                ORDER BY avg_inbox_rate DESC
                LIMIT 10
            ")->fetchAll(PDO::FETCH_ASSOC);
            
            // Performance par ISP
            $isp_performance = $pdo->query("
                SELECT 
                    isp,
                    COUNT(*) as send_count,
                    ROUND(AVG(CASE WHEN status = 'inbox' THEN 1 ELSE 0 END) * 100, 2) as inbox_rate
                FROM admin.unified_send_log
                WHERE send_date >= NOW() - INTERVAL '7 days'
                GROUP BY isp
                ORDER BY inbox_rate DESC
                LIMIT 10
            ")->fetchAll(PDO::FETCH_ASSOC);
            
            echo json_encode([
                'status' => 'success',
                'overview' => [
                    'throughput' => $throughput,
                    'methods' => $methods,
                    'isp_performance' => $isp_performance,
                    'summary' => [
                        'total_flows' => count($throughput),
                        'avg_inbox_rate' => round(array_sum(array_column($isp_performance, 'inbox_rate')) / max(1, count($isp_performance)), 2)
                    ]
                ]
            ]);
            break;
            
        case 'flows':
            $stmt = $pdo->query("SELECT * FROM admin.bpms_flows ORDER BY created_at DESC");
            $flows = $stmt->fetchAll(PDO::FETCH_ASSOC);
            
            echo json_encode([
                'status' => 'success',
                'flows' => $flows,
                'count' => count($flows)
            ]);
            break;
            
        case 'methods':
            $stmt = $pdo->query("
                FROM admin.brain_send_configs 
            ");
            $methods = $stmt->fetchAll(PDO::FETCH_COLUMN, 0);
            
            echo json_encode([
                'status' => 'success',
                'methods' => $methods,
                'count' => count($methods)
            ]);
            break;
            
        case 'throughput':
            $stmt = $pdo->query("
                SELECT 
                    EXTRACT(HOUR FROM send_date) as hour,
                    COUNT(*) as send_count
                FROM admin.unified_send_log
                WHERE send_date >= NOW() - INTERVAL '24 hours'
                GROUP BY EXTRACT(HOUR FROM send_date)
                ORDER BY hour
            ");
            $throughput = $stmt->fetchAll(PDO::FETCH_ASSOC);
            
            echo json_encode([
                'status' => 'success',
                'timeframe' => '24 hours',
                'throughput' => $throughput,
                'total_sends' => array_sum(array_column($throughput, 'send_count'))
            ]);
            break;
            
        case 'create_flow':
            if ($_SERVER['REQUEST_METHOD'] === 'POST') {
                $input = json_decode(file_get_contents('php://input'), true);
                
                $stmt = $pdo->prepare("
                    INSERT INTO admin.bpms_flows (name, flow_type, steps, throughput_hour)
                    VALUES (:name, :flow_type, :steps, :throughput)
                    RETURNING id
                ");
                
                $stmt->execute([
                    ':name' => $input['name'] ?? 'New Flow',
                    ':flow_type' => $input['flow_type'] ?? 'email',
                    ':steps' => json_encode($input['steps'] ?? []),
                    ':throughput' => $input['throughput_hour'] ?? 0
                ]);
                
                $flowId = $stmt->fetchColumn();
                
                echo json_encode([
                    'status' => 'success',
                    'message' => 'Flow created successfully',
                    'flow_id' => $flowId
                ]);
            }
            break;
            
        case 'stats':
            $stats = $pdo->query("
                SELECT 
                    COUNT(*) as total_flows,
                    SUM(throughput_hour) as total_throughput,
                    AVG(throughput_hour) as avg_throughput,
                    SUM(error_count) as total_errors
                FROM admin.bpms_flows
            ")->fetch(PDO::FETCH_ASSOC);
            
            echo json_encode([
                'status' => 'success',
                'stats' => $stats,
                'api' => 'bpms-flows',
                'endpoints' => ['overview', 'flows', 'methods', 'throughput', 'create_flow']
            ]);
            break;
            
        default:
            echo json_encode([
                'status' => 'success',
                'api' => 'bpms-flows',
                'endpoints_available' => ['overview', 'flows', 'methods', 'throughput', 'create_flow'],
                'message' => 'API bpms-flows opérationnelle'
            ]);
    }
    
} catch (PDOException $e) {
    echo json_encode([
        'status' => 'error',
        'message' => 'Erreur base de données: ' . $e->getMessage(),
        'api' => 'bpms-flows'
    ]);
}
?>