<?php
// ============================================================
// marketing_engine/index.php
// Main API endpoint for the Marketing Microservice
// ============================================================

require_once __DIR__ . '/../core/bootstrap.php';
require_once __DIR__ . '/../functions.php';
require_once __DIR__ . '/../core/Services/SiroGeminiService.php';
require_once __DIR__ . '/../core/Services/FcmService.php';

header('Content-Type: application/json');

// Simple bot authentication
$headers = getallheaders();
$botToken = $headers['X-Bot-Token'] ?? '';
// if ($botToken !== 'YOUR_SECRET_BOT_TOKEN') {
//     http_response_code(401);
//     exit(json_encode(['status' => 'error', 'message' => 'Unauthorized']));
// }

$action = $_GET['action'] ?? '';
$platform = $_GET['platform'] ?? 'facebook'; 

try {
    $con = Database::get('main');
    
    switch ($action) {
        case 'get_task':
            $stmt = $con->prepare("
                SELECT id, type 
                FROM marketing_tasks 
                WHERE status = 'pending' AND platform = ? 
                ORDER BY id ASC LIMIT 1
            ");
            $stmt->execute([$platform]);
            $task = $stmt->fetch(PDO::FETCH_ASSOC);
            
            if ($task) {
                $update = $con->prepare("UPDATE marketing_tasks SET status = 'in_progress' WHERE id = ?");
                $update->execute([$task['id']]);
                
                echo json_encode(['status' => 'success', 'data' => $task]);
            } else {
                echo json_encode(['status' => 'success', 'message' => 'No tasks available', 'data' => null]);
            }
            break;
            
        case 'complete_task':
            $taskId = $_POST['task_id'] ?? null;
            $result = $_POST['result'] ?? '';
            
            if ($taskId) {
                $stmt = $con->prepare("UPDATE marketing_tasks SET status = 'completed', completed_at = NOW() WHERE id = ?");
                $stmt->execute([$taskId]);
                echo json_encode(['status' => 'success']);
            } else {
                echo json_encode(['status' => 'error', 'message' => 'task_id required']);
            }
            break;
            
        case 'fail_task':
            $taskId = $_POST['task_id'] ?? null;
            $errorMsg = $_POST['error_message'] ?? 'Unknown error';
            
            if ($taskId) {
                $stmt = $con->prepare("UPDATE marketing_tasks SET status = 'failed', error_message = ? WHERE id = ?");
                $stmt->execute([$errorMsg, $taskId]);
                echo json_encode(['status' => 'success']);
            } else {
                echo json_encode(['status' => 'error', 'message' => 'task_id required']);
            }
            break;
            
        case 'evaluate_posts':
            $input = json_decode(file_get_contents('php://input'), true);
            $posts = $input['posts'] ?? [];
            
            if (empty($posts)) {
                echo json_encode(['status' => 'success', 'data' => null]);
                break;
            }
            
            $gemini = new SiroGeminiService();
            $reportHtml = $gemini->evaluatePostsForReporting($posts);
            
            if ($reportHtml) {
                // Save to database
                $stmt = $con->prepare("INSERT INTO marketing_reports (platform, report_html) VALUES (?, ?)");
                $stmt->execute([$platform, $reportHtml]);
                $reportId = $con->lastInsertId();

                // Send FCM notification to admins
                $fcm = new FcmService();
                $fcm->send(
                    token: '/topics/admin_alerts',
                    title: 'New Social Media Intelligence Report 📊',
                    body: "A new autonomous analysis report for {$platform} has been generated.",
                    data: [
                        'type' => 'marketing_report',
                        'report_id' => $reportId,
                        'platform' => $platform
                    ],
                    category: 'marketing_report'
                );
            }
            
            echo json_encode(['status' => 'success', 'message' => 'Posts evaluated and report saved']);
            break;
            
        case 'get_reports':
            $stmt = $con->prepare("
                SELECT id, platform, report_html, is_weekly, created_at 
                FROM marketing_reports 
                ORDER BY created_at DESC 
                LIMIT 50
            ");
            $stmt->execute();
            $reports = $stmt->fetchAll(PDO::FETCH_ASSOC);
            echo json_encode(['status' => 'success', 'data' => $reports]);
            break;
            
        default:
            echo json_encode(['status' => 'error', 'message' => 'Invalid action']);
    }

} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['status' => 'error', 'message' => 'Server error: ' . $e->getMessage()]);
}