<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\{Cat, Medicine, Food, Supply, Matting, Treatment};
use Carbon\Carbon;
use Illuminate\Support\Facades\DB;

class DashboardController extends Controller
{
    public function index()
    {
        // 1. Statistik Utama
        $stats = [
            'total_cats'    => Cat::count(),
            'total_staff'   => \App\Models\User::count(),
            'sick_cats'     => Cat::whereNotNull('riwayat_sakit_terakhir')->count(),
            'total_mating'  => Matting::where('status', 'proses')->count(),
        ];

        // 2. Birth Watch: Persalinan 7 Hari ke Depan (Rumus: H+63)
        $upcomingBirths = Matting::with(['dam', 'sire', 'pic'])
            ->where('status', 'proses')
            ->whereNotNull('tanggal_kawin')
            ->whereBetween('tanggal_kawin', [
                now()->subDays(70)->toDateString(), 
                now()->subDays(56)->toDateString()  
            ])
            ->get()
            ->map(function ($mating) {
                $mating->edd = Carbon::parse($mating->tanggal_kawin)->addDays(63);
                $mating->days_to_go = (int) now()->diffInDays($mating->edd, false);
                return $mating;
            })
            ->filter(fn($m) => $m->days_to_go >= -2 && $m->days_to_go <= 7)
            ->sortBy('days_to_go');

        // 3. Medical Alerts
        $medicalAlerts = [
            'vaccine'   => Cat::whereNotNull('jadwal_vaksin')->where('jadwal_vaksin', '<=', now()->addDays(3))->count(),
            'flea'      => Cat::whereNotNull('jadwal_obat_kutu')->where('jadwal_obat_kutu', '<=', now()->addDays(3))->count(),
            'deworming' => Cat::whereNotNull('jadwal_obat_cacing')->where('jadwal_obat_cacing', '<=', now()->addDays(3))->count(),
            'grooming'  => Cat::whereNotNull('jadwal_grooming')->where('jadwal_grooming', '<=', now()->addDays(3))->count(),
        ];

        // 4. Inventory Critical (Stok < 5)
        $lowStock = [
            'medicines' => Medicine::where('qty', '<', 5)->get(['nama_obat as name', 'qty', 'unit']),
            'foods'     => Food::where('qty', '<', 5)->get(['nama_makanan as name', 'qty', 'unit']),
            'supplies'  => Supply::where('qty', '<', 5)->get(['nama_perlengkapan as name', 'qty', 'unit']),
        ];
        $totalLowStock = collect($lowStock)->flatten(1)->count();

        // 5. Chart Data: Sebaran Ras (Persian, British Shorthair, dll)
        $chartData = Cat::select('ras', DB::raw('count(*) as total'))->groupBy('ras')->get();

        // 6. Weight Trends: Rata-rata Berat (6 Bulan Terakhir)
        $weightTrends = DB::table('weight_histories')
            ->select(
                DB::raw('AVG(berat) as avg_weight'),
                DB::raw("DATE_FORMAT(tanggal_timbang, '%M') as month"),
                DB::raw('MONTH(tanggal_timbang) as month_num')
            )
            ->where('tanggal_timbang', '>=', now()->subMonths(6))
            ->groupBy('month', 'month_num')
            ->orderBy('month_num')
            ->get();

        if ($weightTrends->isEmpty()) {
            $weightTrends = collect([(object)['month' => now()->format('F'), 'avg_weight' => 0]]);
        }

        // 7. Recent Activity
        $recentTreatments = Treatment::with(['cat', 'pic'])->latest()->take(5)->get();

        return view('pages.dashboard.index', compact(
    'stats', 
    'upcomingBirths', 
    'medicalAlerts', 
    'lowStock', 
    'totalLowStock',
    'chartData',
    'weightTrends',
    'recentTreatments'
));
    }
}