<?php

namespace App\Console\Commands;

use App\Models\PackSim;
use Carbon\Carbon;
use Illuminate\Console\Command;

class CheckExpiringPackages extends Command
{
    protected $signature = 'packages:check-expiring
        {--days= : Días de anticipación para notificar}
        {--test : Modo de prueba }
        {--show-all : Mostrar todos los paquetes con sus fechas de vencimiento}';

    protected $description = 'Verificar paquetes por vencer y enviar notificaciones a los usuarios';

    public function handle()
    {
        $this->info('Verificando paquetes por vencer...');
        $this->newLine();

        $customDays = $this->option('days');
        $testMode = $this->option('test');

        if ($testMode) {
            $this->warn('MODO TEST');
            $this->newLine();
        }

        if ($customDays !== null) {
            $this->info("Usando días personalizados: {$customDays}");
        } else {
            $this->info("Periodo de paquete:");
            $this->line("  • Paquetes de 30 días → Notificar 7 días antes");
            $this->line("  • Paquetes de 15 días → Notificar 3 días antes");
            $this->line("  • Paquetes de 7 días  → Notificar 2 días antes");
        }
        $this->newLine();

        $activePackages = PackSim::with(['package', 'simCard.clientSims.client'])
            ->where('is_active', true)
            ->whereNotNull('activated_at')
            ->get();

        $this->info("Paquetes activos: {$activePackages->count()}");
        $this->newLine();

        $notificationsSent = 0;
        $packagesChecked = 0;

        if ($this->option('show-all')) {
            $this->showAllPackages($activePackages);
            return Command::SUCCESS;
        }

        $now = Carbon::now()->startOfDay();

        foreach ($activePackages as $packSim) {
            $packagesChecked++;

            $activatedAt = Carbon::parse($packSim->activated_at);
            $expirationDate = $activatedAt->copy()->addDays($packSim->package->period);
            $expirationDateStart = $expirationDate->copy()->startOfDay();

            if ($expirationDateStart->isFuture()) {
                $daysRemaining = (int) $now->diffInDays($expirationDateStart, false);
            } elseif ($expirationDateStart->isToday()) {
                $daysRemaining = 0;
            } else {
                // Ya expiró, saltar
                continue;
            }

            $shouldNotify = $this->shouldNotifyForPackage(
                $packSim->package->period,
                $daysRemaining,
                $customDays
            );

            if ($shouldNotify) {
                $clientRelation = $packSim->simCard->activeClient()->first();
                $client = $clientRelation;

                if (!$client) {
                    $this->warn("SIM {$packSim->simCard->iccid} sin cliente activo");
                    continue;
                }

                if ($testMode) {
                    $this->displayNotificationDetails($client, $packSim, $daysRemaining);
                } else {
                    $this->sendWhatsAppNotification($client, $packSim, $daysRemaining);
                }

                $notificationsSent++;
            }
        }

        $this->newLine();
        $this->info('Resumen');
        $this->table(
            ['Métrica', 'Valor'],
            [
                ['Paquetes revisados', $packagesChecked],
                ['Notificaciones enviadas', $notificationsSent],
                ['Modo', $testMode ? 'TEST' : 'PRODUCCIÓN'],
            ]
        );

        return Command::SUCCESS;
    }

    private function shouldNotifyForPackage($packagePeriod, $daysRemaining, $customDays = null)
    {
        if ($customDays !== null) {
            $notificationDays = array_map('intval', explode(',', $customDays));
            return in_array($daysRemaining, $notificationDays);
        }

        switch ($packagePeriod) {
            case 30:
                return $daysRemaining === 7;
            case 15:
                return $daysRemaining === 3;
            case 7:
                return $daysRemaining === 2;
            default:
                return false;
        }
    }

    private function sendWhatsAppNotification($client, $packSim, $daysRemaining)
    {
        $this->warn('PRODUCCIÓN: Aquí se enviaría la notificación real por WhatsApp');
        $this->displayNotificationDetails($client, $packSim, $daysRemaining);
    }

    private function displayNotificationDetails($client, $packSim, $daysRemaining)
    {
        $activatedAt = Carbon::parse($packSim->activated_at);
        $expirationDate = $activatedAt->copy()->addDays($packSim->package->period);

        $this->line('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
        $this->info(" NOTIFICACIÓN A ENVIAR:");
        $this->line("   Cliente: {$client->full_name}");
        $this->line("   Teléfono: {$client->phone}");
        $this->line("   Email: {$client->email}");
        $this->line("   Paquete: {$packSim->package->name} ({$packSim->package->period} días)");
        $this->line("   SIM (ICCID): {$packSim->simCard->iccid}");
        $this->line("   Activado: " . $activatedAt->format('d/m/Y'));
        $this->line("   Vence el: " . $expirationDate->format('d/m/Y'));
        $this->line("   Días restantes: {$daysRemaining} día(s)");
        $this->line('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
        $this->newLine();
    }

    private function showAllPackages($packages)
    {
        $this->info('Mostrando todos los paquetes activos con sus fechas de vencimiento:');
        $this->newLine();

        $data = [];
        $now = Carbon::now()->startOfDay();

        foreach ($packages as $packSim) {
            $activatedAt = Carbon::parse($packSim->activated_at);
            $expirationDate = $activatedAt->copy()->addDays($packSim->package->period);
            $expirationDateStart = $expirationDate->copy()->startOfDay();

            // ✅ CORRECCIÓN: Calcular días restantes correctamente
            if ($expirationDateStart->isFuture()) {
                $daysRemaining = (int) $now->diffInDays($expirationDateStart, false);
            } elseif ($expirationDateStart->isToday()) {
                $daysRemaining = 0;
            } else {
                $daysRemaining = -1; // Expirado
            }

            $clientRelation = $packSim->simCard->activeClient()->first();
            $clientName = $clientRelation ? $clientRelation->full_name : 'Sin cliente activo';

            $data[] = [
                'Cliente' => $clientName,
                'Paquete' => $packSim->package->name,
                'SIM (ICCID)' => $packSim->simCard->iccid,
                'Activado' => $activatedAt->format('d/m/Y'),
                'Vence el' => $expirationDate->format('d/m/Y'),
                'Días restantes' => $daysRemaining >= 0 ? $daysRemaining : 'Expirado',
            ];
        }

        $this->table(
            ['Cliente', 'Paquete', 'SIM (ICCID)', 'Activado', 'Vence el', 'Días restantes'],
            $data
        );
    }
}