<?php
/**
 * get_heatmap.php
 * ───────────────
 * تقرأ بيانات الخريطة الحرارية المجمعة من Redis
 * البيانات مقسمة حسب الدولة (عبر Bounding Boxes في الـ Cron)
 */

header('Content-Type: application/json; charset=utf-8');
require_once __DIR__ . '/../../connect.php'; // Includes functions.php which has filterRequest()

$days        = (int)(filterRequest('days') ?? 7);
$source      = filterRequest('source') ?? 'all';
$countryCode = strtoupper(filterRequest('country_code') ?? 'all');

try {
    $redis = getRedisConnection();
    $cacheJson = $redis->get('siro:cache:heatmap:data');
} catch (Exception $e) {
    echo json_encode(['status' => 'error', 'message' => 'Redis connection failed']);
    exit;
}

if (!$cacheJson) {
    echo json_encode(['status' => 'error', 'message' => 'Cache not generated yet']);
    exit;
}

$cacheData = json_decode($cacheJson, true);

if (!$cacheData || !isset($cacheData['data'])) {
    echo json_encode(['status' => 'error', 'message' => 'Invalid cache data']);
    exit;
}

$limitDate = date('Y-m-d', strtotime("-$days days"));

$filteredLocations = [];
$stats = ['geofence' => 0, 'app_usage' => 0, 'silent_push' => 0];

$dataByCountry = $cacheData['data'];

// تحديد الدول التي سنسحب منها
$countriesToSearch = ($countryCode === 'ALL') ? array_keys($dataByCountry) : [$countryCode];

foreach ($countriesToSearch as $cc) {
    if (!isset($dataByCountry[$cc])) continue;
    
    foreach ($dataByCountry[$cc] as $loc) {
        // فلتر الأيام
        if ($loc['date'] < $limitDate) continue;

        // فلتر المصدر
        if ($source !== 'all' && $loc['source'] !== $source) continue;

        $filteredLocations[] = [
            'latitude' => $loc['lat'],
            'longitude' => $loc['lng'],
            'source' => $loc['source']
        ];

        if (isset($stats[$loc['source']])) {
            $stats[$loc['source']]++;
        }
    }
}

echo json_encode([
    'status' => 'success',
    'data' => $filteredLocations,
    'total' => count($filteredLocations),
    'stats' => $stats,
    'source' => 'redis_cache'
], JSON_UNESCAPED_UNICODE);

// تم إزالة دالة filterRequest من هنا لتجنب خطأ Redeclaration لأنها معرفة في functions.php
?>