<?php

namespace App\Console\Commands;

use App\Helpers\WhatsappHelper;
use App\Models\{Cat, Food, Matting, Medicine, Role, Setting, Supply, User};
use Carbon\Carbon;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

class SendOperationalNotifications extends Command
{
    protected $signature = 'ilycats:notify {--dry-run : Tampilkan kandidat tanpa mengirim WhatsApp}';
    protected $description = 'Mengirim notifikasi WhatsApp HPL, kedaluwarsa inventori, dan berat badan yang belum diperbarui.';

    public function handle(): int
    {
        if ((Setting::where('key', 'notif_wa_status')->value('value') ?? 'inactive') !== 'active') {
            $this->info('Notifikasi WhatsApp sedang nonaktif.');
            return self::SUCCESS;
        }

        $this->sendHplNotifications();
        $this->sendInventoryExpiryNotifications();
        $this->sendWeightStaleNotifications();

        return self::SUCCESS;
    }

    private function recipients(string $settingKey)
    {
        $roleId = Setting::where('key', $settingKey)->value('value');
        $query = User::query()
            ->where('is_active', true)
            ->whereNotNull('phone')
            ->where('phone', '!=', '');

        if ($roleId) {
            $role = Role::find($roleId);
            $query->where(function ($q) use ($roleId, $role) {
                $q->where('role_id', $roleId);
                // Tetap dukung akun admin lama yang belum mempunyai role_id.
                if ($role?->slug === 'admin') {
                    $q->orWhere('role', 'admin');
                }
            });
        } else {
            $query->where('role', 'admin');
        }

        return $query->get();
    }

    private function sendHplNotifications(): void
    {
        if ((Setting::where('key', 'notif_hpl_wa')->value('value') ?? 'active') !== 'active') return;
        $today = now()->startOfDay();
        $recipients = $this->recipients('notif_hpl_role_id');

        Matting::with(['dam','sire'])->whereIn('status', ['proses','hamil'])->whereNotNull('tgl_kawin_awal')->get()->each(function ($m) use ($today, $recipients) {
            $hpl = Carbon::parse($m->tgl_kawin_awal)->startOfDay()->addDays(63);
            $days = (int) $today->diffInDays($hpl, false);
            if ($days < 0 || $days > 7) return;
            $label = $days === 0 ? 'HPL hari ini' : "H-{$days}";
            $message = "🐾 ILYCats - Pengingat HPL\n\nDam: " . ($m->dam?->nama_kucing ?? '-') . "\nSire: " . ($m->sire?->nama_kucing ?? '-') . "\nHPL: " . $hpl->format('d-m-Y') . "\nStatus: {$label}\n\nMohon pantau kondisi induk dan siapkan kebutuhan persalinan.";
            foreach ($recipients as $user) {
                $this->sendOnce("hpl:{$m->id}:{$today->toDateString()}:{$user->id}", 'hpl', $user, $message);
            }
        });
    }

    private function sendInventoryExpiryNotifications(): void
    {
        if ((Setting::where('key', 'notif_inventory_expiry_wa')->value('value') ?? 'active') !== 'active') return;
        $today = now()->startOfDay();
        $limit = $today->copy()->addDays(14);
        $recipients = $this->recipients('notif_inventory_role_id');
        $types = [
            'obat' => [Medicine::class, 'nama_obat'],
            'makanan' => [Food::class, 'nama_makanan'],
            'perlengkapan' => [Supply::class, 'nama_perlengkapan'],
        ];

        foreach ($types as $type => [$model, $nameField]) {
            $model::whereNotNull('expired_at')->whereDate('expired_at', '>=', $today)->whereDate('expired_at', '<=', $limit)->get()->each(function ($item) use ($type, $nameField, $today, $recipients) {
                $expiry = Carbon::parse($item->expired_at)->startOfDay();
                $days = (int) $today->diffInDays($expiry, false);
                $message = "⚠️ ILYCats - Kedaluwarsa Inventori\n\nJenis: " . ucfirst($type) . "\nItem: {$item->{$nameField}}\nKedaluwarsa: " . $expiry->format('d-m-Y') . "\nSisa: {$days} hari\nStok: {$item->qty} {$item->unit}\n\nMohon cek stok dan rencanakan penggantian.";
                foreach ($recipients as $user) {
                    $this->sendOnce("expiry:{$type}:{$item->id}:{$expiry->toDateString()}:{$user->id}", 'inventory_expiry', $user, $message);
                }
            });
        }
    }

    private function sendWeightStaleNotifications(): void
    {
        if ((Setting::where('key', 'notif_weight_stale_wa')->value('value') ?? 'active') !== 'active') return;
        $recipients = $this->recipients('notif_weight_role_id');
        $threshold = now()->subDays(7)->startOfDay();

        Cat::activeInCattery()->withMax('weightHistories as last_weight_at', 'tanggal_timbang')->get()->each(function ($cat) use ($threshold, $recipients) {
            $last = $cat->last_weight_at ? Carbon::parse($cat->last_weight_at)->startOfDay() : null;
            if ($last && $last->gte($threshold)) return;
            $days = $last ? $last->diffInDays(now()->startOfDay()) : null;
            $lastKey = $last?->toDateString() ?? 'none';
            $message = "⚖️ ILYCats - Berat Belum Diperbarui\n\nKucing: {$cat->nama_kucing}\nBerat terakhir: " . ($cat->berat_badan ? $cat->berat_badan . ' kg' : '-') . "\nTerakhir ditimbang: " . ($last ? $last->format('d-m-Y') . " ({$days} hari lalu)" : 'belum ada pencatatan') . "\n\nMohon lakukan penimbangan terbaru.";
            foreach ($recipients as $user) {
                $this->sendOnce("weight:{$cat->id}:{$lastKey}:{$user->id}", 'weight_stale', $user, $message);
            }
        });
    }

    private function sendOnce(string $key, string $type, User $user, string $message): void
    {
        if (DB::table('notification_dispatches')->where('notification_key', $key)->exists()) return;
        if ($this->option('dry-run')) {
            $this->line("[DRY] {$user->name}: {$key}");
            return;
        }
        try {
            WhatsappHelper::send($user->phone, $message);
            DB::table('notification_dispatches')->insert([
                'notification_key' => $key,
                'type' => $type,
                'user_id' => $user->id,
                'channel' => 'whatsapp',
                'sent_at' => now(),
                'message' => $message,
                'created_at' => now(),
                'updated_at' => now(),
            ]);
        } catch (\Throwable $e) {
            Log::error("ILYCats WA notification failed [{$key}]: {$e->getMessage()}");
            $this->error("Gagal {$key}: {$e->getMessage()}");
        }
    }
}