<?php
/**
 * Sync Block to Talpa
 * Synchronizes all transmissions in a specific block to Talpa API
 */

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

require_once __DIR__ . '/../vendor/autoload.php';
require_once __DIR__ . '/../TalpaAPI.php';
require_once __DIR__ . '/../helpers.php';
require_once __DIR__ . '/../auth/auth_functions.php';

use Dotenv\Dotenv;
$dotenv = Dotenv::createImmutable(__DIR__ . '/..');
$dotenv->load();

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

// Authentication check
if (!isLoggedIn()) {
    http_response_code(401);
    echo json_encode(['success' => false, 'error' => 'Niet geautoriseerd. Log eerst in.']);
    exit;
}

// Authorization check - admin only
if (!canSync()) {
    http_response_code(403);
    echo json_encode(['success' => false, 'error' => 'Geen toegang. Alleen admins kunnen synchroniseren.']);
    exit;
}

$api = new TalpaApi();
$db = getDbConnection();

// Debug logging
$debugLog = [];
$debugLog[] = ['step' => 'Start', 'time' => date('Y-m-d H:i:s')];

// Get POST data
$input = json_decode(file_get_contents('php://input'), true);
$debugLog[] = ['step' => 'Input received', 'data' => $input];

if (!isset($input['date']) || !isset($input['channel'])) {
    echo json_encode([
        'success' => false,
        'error' => 'Datum en channel zijn verplicht',
        'debug' => $debugLog
    ]);
    exit;
}

$date = $input['date'];
$channel = $input['channel'];
$debugLog[] = ['step' => 'Parameters', 'date' => $date, 'channel' => $channel];

try {
    // Get all transmissions for this block
    // Include both new (pending) and existing (synced) transmissions
    $stmt = $db->prepare("
        SELECT t.*, c.content_id, c.title as commercial_title
        FROM transmissions t
        JOIN infomercials c ON t.infomercial_id = c.id
        WHERE t.start_date = ?
        AND t.channel = ?
        ORDER BY t.start_time ASC
    ");
    $stmt->execute([$date, $channel]);
    $transmissions = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    $debugLog[] = ['step' => 'Query executed', 'count' => count($transmissions)];
    
    if (empty($transmissions)) {
        echo json_encode([
            'success' => true,
            'message' => 'Geen uitzendingen om te synchroniseren',
            'synced' => 0,
            'failed' => 0,
            'debug' => $debugLog
        ]);
        exit;
    }
    
    $syncedCount = 0;
    $failedCount = 0;
    $errors = [];
    $apiCalls = [];
    
    // Sync each transmission
    foreach ($transmissions as $tx) {
        $txDebug = [
            'transmission_id' => $tx['id'],
            'title' => $tx['commercial_title'],
            'time' => $tx['start_time'],
            'talpa_transmission_id' => $tx['talpa_transmission_id']
        ];
        
        try {
            $requestData = [
                "channel" => $tx['channel'],
                "template" => $tx['template'],
                "startDate" => $tx['start_date'],
                "startTime" => $tx['start_time'],
                "duration" => $tx['duration'],
                "contentId" => $tx['content_id']
            ];
            
            $txDebug['request'] = $requestData;
            
            // Determine if this is a new transmission or an update
            if (!empty($tx['talpa_transmission_id'])) {
                // Update existing transmission in Talpa
                $txDebug['action'] = 'update';
                $res = $api->updateTransmission($tx['talpa_transmission_id'], $requestData);
            } else {
                // Create new transmission in Talpa
                $txDebug['action'] = 'create';
                $res = $api->createTransmission($requestData);
            }
            
            $txDebug['response'] = $res;
            $txDebug['lastResponse'] = $api->lastResponse;
            
            // Check if sync was successful
            $status = 'error';
            $talpaTransmissionId = $tx['talpa_transmission_id'];
            
            if ($txDebug['action'] === 'create') {
                // For create: check for id in response
                if (isset($res['id'])) {
                    $status = 'synced';
                    $talpaTransmissionId = $res['id'];
                } elseif (isset($res['statusCode']) && $res['statusCode'] == 201) {
                    $status = 'synced';
                    $talpaTransmissionId = $res['id'] ?? $talpaTransmissionId;
                }
            } else {
                // For update: check for success status
                if (isset($res['statusCode']) && ($res['statusCode'] == 200 || $res['statusCode'] == '200')) {
                    $status = 'synced';
                } elseif (isset($res['message']) && strpos($res['message'], 'updated') !== false) {
                    $status = 'synced';
                }
            }
            
            $txDebug['determined_status'] = $status;
            $txDebug['talpa_transmission_id_saved'] = $talpaTransmissionId;
            
            // Update transmission status and talpa_transmission_id
            $updateStmt = $db->prepare("
                UPDATE transmissions
                SET api_status = ?, api_response = ?, talpa_transmission_id = ?
                WHERE id = ?
            ");
            $updateStmt->execute([$status, json_encode($res), $talpaTransmissionId, $tx['id']]);
            
            if ($status === 'synced') {
                $syncedCount++;
                $txDebug['result'] = 'success';
            } else {
                $failedCount++;
                $txDebug['result'] = 'failed';
                $errors[] = [
                    'transmission_id' => $tx['id'],
                    'title' => $tx['commercial_title'],
                    'time' => $tx['start_time'],
                    'error' => $res['message'] ?? json_encode($res)
                ];
            }
            
        } catch (Exception $e) {
            $failedCount++;
            $txDebug['result'] = 'exception';
            $txDebug['exception'] = $e->getMessage();
            
            $errors[] = [
                'transmission_id' => $tx['id'],
                'title' => $tx['commercial_title'],
                'time' => $tx['start_time'],
                'error' => $e->getMessage()
            ];
            
            // Update status to error
            $updateStmt = $db->prepare("
                UPDATE transmissions
                SET api_status = 'error', api_response = ?
                WHERE id = ?
            ");
            $updateStmt->execute([json_encode(['error' => $e->getMessage()]), $tx['id']]);
        }
        
        $apiCalls[] = $txDebug;
    }
    
    $debugLog[] = ['step' => 'Sync completed', 'synced' => $syncedCount, 'failed' => $failedCount];
    
    echo json_encode([
        'success' => true,
        'message' => "Synchronisatie voltooid: {$syncedCount} geslaagd, {$failedCount} mislukt",
        'synced' => $syncedCount,
        'failed' => $failedCount,
        'errors' => $errors,
        'debug' => $debugLog,
        'api_calls' => $apiCalls
    ]);
    
} catch (Exception $e) {
    $debugLog[] = ['step' => 'Exception caught', 'error' => $e->getMessage(), 'trace' => $e->getTraceAsString()];
    echo json_encode([
        'success' => false,
        'error' => 'Database fout: ' . $e->getMessage(),
        'debug' => $debugLog
    ]);
}