<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\DB;

/**
 * Tracking Controller
 * Replaces: ride/rides/get_driver_location.php, public_track_location.php, getRealTimeHeatmap.php
 */

/**
 * متحكم التتبع (Tracking Controller)
 * 
 * الغرض من الملف:
 * توفير بيانات المواقع الجغرافية الحية للسائقين والركاب.
 * 
 * كيفية العمل:
 * 1. يجلب إحداثيات السائق من قاعدة بيانات التتبع (tracking) لعرضها للراكب.
 * 2. يوفر بيانات "خريطة الحرارة" (Heatmap) لمعرفة أماكن تركز الطلبات.
 * 3. يتيح تتبع الرحلة بشكل علني (Public Tracking) عبر رابط خارجي.
 */
class TrackingController extends Controller
{
    /** GET /v2/tracking/driver/{rideId} */
    public function driverLocation(Request $request, int $rideId): JsonResponse
    {
        $ride = DB::connection('ride')->table('ride')
            ->where('id', $rideId)
            ->whereIn('status', ['Applied', 'Arrived', 'Begin'])
            ->first();

        if (!$ride) {
            return response()->json(['status' => 'failure', 'message' => 'Ride not active'], 404);
        }

        $location = DB::connection('tracking')->table('car_locations')
            ->where('driver_id', $ride->driver_id)
            ->first();

        if (!$location) {
            return response()->json(['status' => 'failure', 'message' => 'Driver location not available'], 404);
        }

        return response()->json([
            'status' => 'success',
            'data' => [
                'latitude' => $location->latitude,
                'longitude' => $location->longitude,
                'heading' => $location->heading,
                'speed' => $location->speed,
                'updated_at' => $location->updated_at,
            ],
        ]);
    }

    /**
     * GET /v2/tracking/public/{rideId}?hash=XXX
     * Public tracking link for parents/friends — uses HMAC hash instead of auth
     */
    public function publicTrack(Request $request, int $rideId): JsonResponse
    {
        $hash = $request->input('hash');
        if (!$hash) {
            return response()->json(['status' => 'failure', 'message' => 'Missing hash'], 400);
        }

        // Verify hash: HMAC-SHA256(ride_id, secret_salt)
        $expectedHash = hash_hmac('sha256', (string) $rideId, config('intaleq.secret_salt_parent'));
        if (!hash_equals($expectedHash, $hash)) {
            return response()->json(['status' => 'failure', 'message' => 'Invalid hash'], 403);
        }

        $ride = DB::connection('ride')->table('ride')
            ->where('id', $rideId)
            ->whereIn('status', ['Applied', 'Arrived', 'Begin'])
            ->first();

        if (!$ride) {
            return response()->json(['status' => 'failure', 'message' => 'Ride not active'], 404);
        }

        $location = DB::connection('tracking')->table('car_locations')
            ->where('driver_id', $ride->driver_id)
            ->first();

        return response()->json([
            'status' => 'success',
            'data' => [
                'latitude' => $location->latitude ?? null,
                'longitude' => $location->longitude ?? null,
                'heading' => $location->heading ?? null,
                'ride_status' => $ride->status,
            ],
        ]);
    }

    /** 
     * GET /v2/tracking/heatmap 
     * المطورة لتطابق V1 مع تحسين الأداء
     */
    public function heatmap(Request $request): JsonResponse
    {
        $precision = 2; // دقة الشبكة (~1 كم)
        $grid = [];

        // 1. جلب طلبات الانتظار (Waiting) من قاعدة البيانات الأساسية
        $waitingRides = DB::connection('primary')->table('waitingRides')
            ->select('start_lat', 'start_lng')
            ->whereIn('status', ['wait', 'waiting'])
            ->get();

        foreach ($waitingRides as $ride) {
            $this->addToGrid($grid, $ride->start_lat, $ride->start_lng, $precision, 5);
        }

        // 2. جلب الطلبات الضائعة (Timeout/Cancelled) من خادم الرحلات - آخر 20 دقيقة
        $missedRides = DB::connection('ride')->table('ride')
            ->select('start_location')
            ->whereIn('status', ['timeout', 'cancelled_no_driver_found'])
            ->where('created_at', '>=', now()->subMinutes(20))
            ->get();

        foreach ($missedRides as $ride) {
            $parts = explode(',', $ride->start_location);
            if (count($parts) == 2) {
                $this->addToGrid($grid, $parts[0], $parts[1], $precision, 8);
            }
        }

        // 3. جلب الطلبات النشطة (Active) - آخر 15 دقيقة
        $activeRides = DB::connection('ride')->table('ride')
            ->select('start_location')
            ->where('created_at', '>=', now()->subMinutes(15))
            ->whereNotIn('status', ['timeout', 'cancelled_no_driver_found'])
            ->get();

        foreach ($activeRides as $ride) {
            $parts = explode(',', $ride->start_location);
            if (count($parts) == 2) {
                $this->addToGrid($grid, $parts[0], $parts[1], $precision, 1);
            }
        }

        // 4. معالجة البيانات النهائية (التصنيف والـ Surge)
        $finalData = [];
        foreach ($grid as $cell) {
            $score = $cell['score'];
            $count = $cell['count'];

            $intensity = 'normal';
            $surge = 1.0;

            if ($score >= 15 || $count >= 5) {
                $intensity = 'high';
                $surge = 1.5;
            } elseif ($score >= 8 || $count >= 3) {
                $intensity = 'medium';
                $surge = 1.2;
            }

            $finalData[] = [
                'lat'       => $cell['lat'],
                'lng'       => $cell['lng'],
                'count'     => $count,
                'intensity' => $intensity,
                'surge'     => $surge
            ];
        }

        return response()->json([
            'status' => 'success',
            'data' => $finalData
        ]);
    }

    /** دالة مساعدة لتجميع النقاط في الشبكة */
    private function addToGrid(&$grid, $lat, $lng, $precision, $weight): void
    {
        if (empty($lat) || empty($lng)) return;

        $rLat = round((float)$lat, $precision);
        $rLng = round((float)$lng, $precision);
        $key = "{$rLat},{$rLng}";

        if (!isset($grid[$key])) {
            $grid[$key] = ['lat' => $rLat, 'lng' => $rLng, 'count' => 0, 'score' => 0];
        }

        $grid[$key]['count']++;
        $grid[$key]['score'] += $weight;
    }

    /** GET /v2/tracking/captain-stats */
    public function captainStats(Request $request): JsonResponse
    {
        $driverId = $request->attributes->get('_jwt_user_id');

        $totalRides = DB::connection('ride')->table('ride')
            ->where('driver_id', $driverId)
            ->where('status', 'finish')
            ->count();

        $todayRides = DB::connection('ride')->table('ride')
            ->where('driver_id', $driverId)
            ->where('status', 'finish')
            ->whereDate('rideTimeFinish', today())
            ->count();

        $todayEarnings = DB::connection('ride')->table('ride')
            ->where('driver_id', $driverId)
            ->where('status', 'finish')
            ->whereDate('rideTimeFinish', today())
            ->sum('price_for_driver');

        $workHours = DB::connection('tracking')->table('driver_daily_summary')
            ->where('driver_id', $driverId)
            ->where('date', today()->toDateString())
            ->value('total_seconds') ?? 0;

        return response()->json([
            'status' => 'success',
            'data' => [
                'total_rides' => $totalRides,
                'today_rides' => $todayRides,
                'today_earnings' => round($todayEarnings, 2),
                'today_work_seconds' => $workHours,
            ],
        ]);
    }
}