<?php

namespace App\Http\Controllers;

use App\Models\{Cat, User, Matting};
use App\Traits\LogsActivity;
use Illuminate\Http\Request;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\JsonResponse;
use Illuminate\View\View;
use Illuminate\Support\Facades\{Storage, DB, Gate}; // Tambahkan Gate
use Illuminate\Support\Carbon;
use Barryvdh\DomPDF\Facade\Pdf;
use SimpleSoftwareIO\QrCode\Facades\QrCode;
use Intervention\Image\Laravel\Facades\Image;

class CatController extends Controller
{
    use LogsActivity;

    /**
     * Menampilkan daftar kucing dengan filter cerdas.
     */
    public function index(Request $request): View
    {
        // Proteksi Akses: Read
        Gate::authorize('check-access', ['cats', 'read']);

        $query = Cat::query()->with(['pic', 'sire', 'dam']);

        // 1. Pencarian Global
        if ($request->filled('search')) {
            $search = $request->search;
            $query->where(function($q) use ($search) {
                $q->where('nama_kucing', 'like', "%{$search}%")
                  ->orWhere('ras', 'like', "%{$search}%")
                  ->orWhere('microchip', 'like', "%{$search}%")
                  ->orWhere('pedigree', 'like', "%{$search}%")
                  ->orWhere('kode_ems', 'like', "%{$search}%");
            });
        }

        // 2. Filter Spesifik
        if ($request->filled('status')) $query->where('status', $request->status);
        if ($request->filled('ras'))    $query->where('ras', $request->ras);
        if ($request->filled('gender')) $query->where('jenis_kelamin', $request->gender);

        $cats = $query->latest()->paginate(15)->withQueryString();

        // 3. Statistik Dashboard (Tetap Utuh)
        $totalCats = Cat::count();
        $safeWords = ['sehat', 'normal', 'aktif', 'sembuh', '-', 'tidak ada', 'clean'];
        $sickCats = Cat::whereNotNull('riwayat_sakit_terakhir')
                    ->where(function($q) use ($safeWords) {
                        foreach ($safeWords as $word) {
                            $q->where('riwayat_sakit_terakhir', 'NOT LIKE', "%{$word}%");
                        }
                    })->count();

        $breeds = Cat::distinct()->pluck('ras');

        return view('pages.cats.index', compact('cats', 'totalCats', 'sickCats', 'breeds'));
    }

    public function create(): View
    {
        // Proteksi Akses: Create
        Gate::authorize('check-access', ['cats', 'create']);

        $sires = Cat::where('jenis_kelamin', 'Jantan')->get(['id', 'nama_kucing']);
        $dams  = Cat::where('jenis_kelamin', 'Betina')->get(['id', 'nama_kucing']);
        $users = User::all(['id', 'name']);

        return view('pages.cats.create', compact('sires', 'dams', 'users'));
    }

    public function store(Request $request): RedirectResponse
    {
        Gate::authorize('check-access', ['cats', 'create']);

        $validated = $this->validateCat($request);

        return DB::transaction(function () use ($request, $validated) {
            if ($request->hasFile('foto')) {
                $validated['foto'] = $this->handleImageUpload($request->file('foto'));
            }

            if (isset($validated['berat_badan'])) {
                $validated['berat_terakhir'] = $validated['berat_badan'];
            }

            if (empty($validated['status'])) {
                $validated['status'] = ($request->induk_jantan_id || $request->induk_betina_id) ? 'Kitten' : 'Active';
            }

            // Memastikan registry disimpan sebagai JSON jika model tidak melakukan casting
            if (isset($validated['registry'])) {
                $validated['registry'] = $validated['registry']; 
            }

            $cat = Cat::create($validated);
            $this->logAction('CREATED', $cat, "Mendaftarkan pasien baru: {$cat->nama_kucing}", 'Cat');

            return redirect()->route('cats.index')->with('success', "{$cat->nama_kucing} berhasil didaftarkan.");
        });
    }

    public function show(Cat $cat): View
    {
        Gate::authorize('check-access', ['cats', 'read']);

        $cat->load([
            'treatments' => fn($q) => $q->latest(), 
            'sire', 'dam', 'pic', 
            'weightHistories' => fn($q) => $q->latest()->limit(12)
        ]);
        return view('pages.cats.show', compact('cat'));
    }

    public function edit(Cat $cat): View
    {
        // Proteksi: Akses Update
        Gate::authorize('check-access', ['cats', 'update']);

        $sires = Cat::where('jenis_kelamin', 'Jantan')->where('id', '!=', $cat->id)->get(['id', 'nama_kucing']);
        $dams  = Cat::where('jenis_kelamin', 'Betina')->where('id', '!=', $cat->id)->get(['id', 'nama_kucing']);
        $users = User::all(['id', 'name']);

        return view('pages.cats.edit', compact('cat', 'sires', 'dams', 'users'));
    }

    public function update(Request $request, Cat $cat): RedirectResponse
    {
        Gate::authorize('check-access', ['cats', 'update']);

        $validated = $this->validateCat($request, $cat->id);

        return DB::transaction(function () use ($request, $validated, $cat) {
            if ($request->hasFile('foto')) {
                if ($cat->foto) Storage::disk('public')->delete($cat->foto);
                $validated['foto'] = $this->handleImageUpload($request->file('foto'));
            }

            if ($request->filled('berat_badan')) {
                $validated['berat_terakhir'] = $request->berat_badan;
                if ($cat->berat_badan != $request->berat_badan) {
                    $cat->weightHistories()->create(['berat' => $request->berat_badan]);
                }
            }

            $cat->update($validated);
            $this->logAction('UPDATED', $cat, "Update data medis/profil: {$cat->nama_kucing}", 'Cat');

            return redirect()->route('cats.index')->with('success', 'Data berhasil diperbarui.');
        });
    }

    public function destroy(Cat $cat): RedirectResponse
    {
        Gate::authorize('check-access', ['cats', 'delete']);

        $isParent = Matting::where('sire_id', $cat->id)->orWhere('dam_id', $cat->id)->exists();
        
        if ($isParent) {
            return back()->with('error', "Gagal! {$cat->nama_kucing} tidak bisa dihapus karena sudah menjadi Induk.");
        }

        return DB::transaction(function () use ($cat) {
            $name = $cat->nama_kucing;
            if ($cat->foto) Storage::disk('public')->delete($cat->foto);
            
            $this->logAction('DELETED', $cat, "Menghapus data permanen: {$name}", 'Cat');
            $cat->delete();

            return redirect()->route('cats.index')->with('success', "Data {$name} telah dihapus.");
        });
    }

    public function getCatData($id): JsonResponse
    {
        $cat = Cat::find($id);
        if (!$cat) return response()->json(['error' => 'Not found'], 404);

        return response()->json([
            'tgl_lahir' => $cat->tanggal_lahir ? $cat->tanggal_lahir->format('Y-m-d') : '',
            'pedigree'  => $cat->pedigree ?? '',
            'microchip' => $cat->microchip ?? '',
            'kode_ems'  => $cat->kode_ems ?? '',
        ]);
    }

    /**
     * PDF ID Card / Medical Pass
     * PENYEMPURNAAN: Perbaikan Barcode (Base64 SVG)
     */
    public function downloadPdf(Cat $cat)
    {
        Gate::authorize('check-access', ['cats', 'read']);

        $cat->load(['pic', 'sire', 'dam']);
        
        // FIX: Konversi SVG ke Base64 agar tampil di domPDF tanpa Imagick
        $qrCodeRaw = QrCode::format('svg')
                    ->size(150)
                    ->margin(1)
                    ->generate(route('cats.show', $cat->id));
        
        $qrCode = base64_encode($qrCodeRaw);

        $pdf = Pdf::loadView('pages.cats.pdf-card', [
            'cat' => $cat,
            'qrCode' => $qrCode, // Dikirim sebagai Base64
            'printedAt' => Carbon::now()->translatedFormat('d F Y H:i')
        ]);

        return $pdf->setPaper([0, 0, 300, 500], 'portrait')
                   ->stream('MEDICAL_PASS_' . strtoupper($cat->nama_kucing) . '.pdf');
    }

    /* -------------------------------------------------------------------------- */
    /* HELPERS (TETAP UTUH)                                                       */
    /* -------------------------------------------------------------------------- */

    private function validateCat(Request $request, $id = null)
    {
        return $request->validate([
            'nama_kucing'   => 'required|string|max:255',
            'ras'           => 'required|string',
            'jenis_kelamin' => 'required|in:Jantan,Betina',
            'tanggal_lahir' => 'nullable|date',
            'foto'          => 'nullable|image|mimes:jpg,jpeg,png|max:3072',
            'registry'      => 'nullable|array',
            'registry.*'    => 'string',
            'pedigree'      => 'nullable|string|max:255',
            'microchip'     => 'nullable|string|max:255',
            'kode_ems'      => 'nullable|string|max:255',
            'status'        => 'nullable|string', 
            'induk_jantan_id' => 'nullable|exists:cats,id',
            'induk_betina_id' => 'nullable|exists:cats,id',
            'lokasi_kandang'  => 'nullable|string',
            'pic_id'          => 'nullable|exists:users,id',
            'berat_badan'     => 'nullable|numeric|min:0',
            'riwayat_sakit_terakhir' => 'nullable|string',
            'jadwal_vaksin'      => 'nullable|date',
            'jadwal_obat_cacing' => 'nullable|date',
            'jadwal_obat_kutu'   => 'nullable|date',
            'jadwal_grooming'    => 'nullable|date',
        ]);
    }

    private function handleImageUpload($file): string
    {
        $filename = 'cat_' . uniqid() . '.png';
        $path = 'cats/' . $filename;
        $img = Image::read($file)->cover(500, 500, 'center')->toPng();
        Storage::disk('public')->put($path, (string) $img);
        return $path;
    }
}