<?php
// =========================================================
// backend/bot/generate_price_tasks.php
// Cron Job: Runs every 15 minutes
// Generates random Short & Long trips in Damascus
// =========================================================

// CLI or Web execution
require_once __DIR__ . '/../core/bootstrap.php';
require_once __DIR__ . '/../functions.php';

try {
    $con = Database::get('main');
} catch (Exception $e) {
    die("Database connection failed\n");
}

// 1. Ensure Table Exists
$sql = "
CREATE TABLE IF NOT EXISTS competitor_prices (
    id INT AUTO_INCREMENT PRIMARY KEY,
    app_name VARCHAR(50) NOT NULL,
    start_lat DECIMAL(10,8) NOT NULL,
    start_lng DECIMAL(11,8) NOT NULL,
    end_lat DECIMAL(10,8) NOT NULL,
    end_lng DECIMAL(11,8) NOT NULL,
    distance_km FLOAT NOT NULL,
    price FLOAT NOT NULL,
    recorded_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    INDEX idx_app_time (app_name, recorded_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
";
$con->exec($sql);

// 2. Ten Key Regions in Damascus
$regions = [
    ['name' => 'Umayyad Square', 'lat' => 33.5138, 'lng' => 36.2765],
    ['name' => 'Mezzeh',         'lat' => 33.5074, 'lng' => 36.2530],
    ['name' => 'Malki',          'lat' => 33.5220, 'lng' => 36.2840],
    ['name' => 'Kafersouseh',    'lat' => 33.4981, 'lng' => 36.2730],
    ['name' => 'Al-Midan',       'lat' => 33.4947, 'lng' => 36.2995],
    ['name' => 'Bab Tuma',       'lat' => 33.5126, 'lng' => 36.3150],
    ['name' => 'Rukneddine',     'lat' => 33.5350, 'lng' => 36.2950],
    ['name' => 'Dummar',         'lat' => 33.5385, 'lng' => 36.2250],
    ['name' => 'Baramkeh',       'lat' => 33.5100, 'lng' => 36.2885],
    ['name' => 'Muhajireen',     'lat' => 33.5320, 'lng' => 36.2720],
];

$competitors = ['yallago', 'zaken', 'tufaddal'];

// Helper to generate a random point within a radius (in km)
function generateRandomPoint($lat, $lng, $radius) {
    $radiusInDegrees = $radius / 111.0; // 1 degree is ~111km
    $u = lcg_value();
    $v = lcg_value();
    $w = $radiusInDegrees * sqrt($u);
    $t = 2 * pi() * $v;
    $x = $w * cos($t);
    $y = $w * sin($t);

    // Adjust longitude based on latitude
    $new_lng = $x / cos(deg2rad($lat));
    $new_lat = $y;

    return [
        'lat' => $lat + $new_lat,
        'lng' => $lng + $new_lng
    ];
}

$tasksCreated = 0;

foreach ($regions as $region) {
    // A. Generate Start Point (within 2km of region center)
    $start = generateRandomPoint($region['lat'], $region['lng'], 2);

    // B. Generate Short Trip (2-5 km from start)
    $shortDist = rand(20, 50) / 10.0;
    $shortEnd = generateRandomPoint($start['lat'], $start['lng'], $shortDist);

    // C. Generate Long Trip (10-15 km from start)
    $longDist = rand(100, 150) / 10.0;
    $longEnd = generateRandomPoint($start['lat'], $start['lng'], $longDist);

    $trips = [$shortEnd, $longEnd];

    foreach ($trips as $end) {
        foreach ($competitors as $app) {
            $taskId = "prc_" . uniqid();
            
            $taskData = [
                "task_id" => $taskId,
                "type" => "price_check",
                "app" => $app,
                "payload" => [
                    "start_lat" => $start['lat'],
                    "start_lng" => $start['lng'],
                    "end_lat" => $end['lat'],
                    "end_lng" => $end['lng']
                ]
            ];

            // Push to Redis Queue
            $redis->lpush('queue:bot:tasks', json_encode($taskData));
            $tasksCreated++;
        }
    }
}

echo "Successfully generated and queued $tasksCreated pricing tasks.\n";