<?php

namespace App\Http\Controllers\Breeding;

use App\Http\Controllers\Controller;
use App\Models\{Matting, Cat, Kitten};
use App\Traits\LogsActivity;
use Illuminate\Http\{Request, RedirectResponse, JsonResponse};
use Illuminate\Support\Facades\{DB, Storage, Gate};
use Illuminate\View\View;

class MattingController extends Controller
{
    use LogsActivity;

    public function index(): View
    {
        Gate::authorize('check-access', ['matting', 'read']);
        $mattings = Matting::with(['sire', 'dam'])
            ->withCount('kittens')
            ->latest()
            ->paginate(15);
            
        return view('pages.matting.index', compact('mattings'));
    }

    public function create(): View
    {
        Gate::authorize('check-access', ['matting', 'create']);
        $sires = Cat::where('jenis_kelamin', 'Jantan')->get(['id', 'nama_kucing', 'ras']);
        $dams = Cat::where('jenis_kelamin', 'Betina')->get(['id', 'nama_kucing', 'ras']);
        return view('pages.matting.create', compact('sires', 'dams'));
    }

    public function getCatData($id): JsonResponse
    {
        Gate::authorize('check-access', ['matting', 'read']);
        $cat = Cat::find($id);
        if (!$cat) return response()->json(['error' => 'Kucing tidak ditemukan'], 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 ?? '',
        ]);
    }

    /**
     * STORE: Menyimpan Data Breeding Baru
     */
    public function store(Request $request): RedirectResponse
    {
        Gate::authorize('check-access', ['matting', 'create']);
        $this->validateMatting($request);

        return DB::transaction(function () use ($request) {
            // 1. Sinkronisasi Data Induk (Update profil bapak/ibu di tabel cats)
            $this->syncParentData($request);

            // 2. Simpan Transaksi Matting
            $matting = Matting::create(array_merge($request->except('kittens'), [
                'tanggal_kawin' => $request->tgl_kawin_awal,
                'user_id' => auth()->id(),
                'ems_bapak' => $request->ems_bapak,
                'ems_ibu'   => $request->ems_ibu,
            ]));

            // 3. Simpan Kittens
            if ($request->has('kittens')) {
                foreach ($request->kittens as $index => $data) {
                    $this->saveKittenData($matting, $data, $index, $request);
                }
            }

            $this->logAction('MATTING_CREATED', $matting, "Registrasi Breeding Baru");
            return redirect()->route('matting.index')->with('success', 'Data Breeding & Anak berhasil disimpan!');
        });
    }

    /**
     * EDIT: Menampilkan Form Edit (Metode yang tadi hilang)
     */
    public function edit(Matting $matting): View
    {
        Gate::authorize('check-access', ['matting', 'update']);
        // Load relasi agar data anak muncul di form edit
        $matting->load('kittens.cat');
        
        $sires = Cat::where('jenis_kelamin', 'Jantan')->get(['id', 'nama_kucing', 'ras']);
        $dams = Cat::where('jenis_kelamin', 'Betina')->get(['id', 'nama_kucing', 'ras']);
        
        return view('pages.matting.edit', compact('matting', 'sires', 'dams'));
    }

    /**
     * UPDATE: Memperbarui Data Breeding & Sinkronisasi Ulang Kittens
     */
    public function update(Request $request, Matting $matting): RedirectResponse
    {
        Gate::authorize('check-access', ['matting', 'update']);
        $this->validateMatting($request);

        return DB::transaction(function () use ($request, $matting) {
            // 1. Update profil Bapak/Ibu di tabel 'cats'
            $this->syncParentData($request);

            // 2. Update data di tabel 'mattings'
            $matting->update(array_merge($request->except('kittens'), [
                'tanggal_kawin' => $request->tgl_kawin_awal,
                'ems_bapak' => $request->ems_bapak,
                'ems_ibu'   => $request->ems_ibu,
            ]));

            // 3. Sinkronisasi Kittens (CRUD Logic)
            $requestKittenIds = collect($request->kittens)->pluck('id')->filter()->toArray();

            // Hapus Kitten yang tidak ada di form lagi
            $kittensToDelete = $matting->kittens()->whereNotIn('id', $requestKittenIds)->get();
            foreach ($kittensToDelete as $kDelete) {
                if ($kDelete->cat_id) Cat::find($kDelete->cat_id)?->delete();
                $kDelete->delete();
            }

            if ($request->has('kittens')) {
                foreach ($request->kittens as $index => $data) {
                    if (isset($data['id']) && !empty($data['id'])) {
                        $kitten = Kitten::find($data['id']);
                        if ($kitten) {
                            // Update profil master anak di tabel 'cats'
                            Cat::where('id', $kitten->cat_id)->update([
                                'nama_kucing'   => $data['nama'],
                                'jenis_kelamin' => $data['jenis_kelamin'],
                                'tanggal_lahir' => $data['tgl_lahir'],
                                'kode_ems'      => $data['kode_ems'] ?? null,
                                'registry'      => $data['registry'] ?? [],
                            ]);
                            // Update record silsilah di tabel 'kittens'
                            $kitten->update([
                                'nama'          => $data['nama'],
                                'tgl_lahir'     => $data['tgl_lahir'],
                                'jenis_kelamin' => $data['jenis_kelamin'],
                                'kode_ems'      => $data['kode_ems'] ?? null,
                                'is_pedigree'   => isset($data['is_pedigree']),
                                'registry'      => $data['registry'] ?? [],
                            ]);
                            $this->handlePedigreeUploads($kitten, $index, $request);
                        }
                    } else {
                        $this->saveKittenData($matting, $data, $index, $request);
                    }
                }
            }

            $this->logAction('MATTING_UPDATED', $matting, "Update Breeding Record");
            return redirect()->route('matting.index')->with('success', 'Perubahan berhasil disimpan!');
        });
    }

    /**
     * SINKRONISASI DATA INDUK (EMS Fix)
     */
    private function syncParentData(Request $request)
    {
        Cat::where('id', $request->sire_id)->update([
            'microchip'     => $request->no_microchip_bapak,
            'tanggal_lahir' => $request->tgl_lahir_sire,
            'kode_ems'      => $request->ems_bapak // Sinkron EMS Bapak
        ]);

        Cat::where('id', $request->dam_id)->update([
            'microchip'     => $request->no_microchip_ibu,
            'tanggal_lahir' => $request->tgl_lahir_dam,
            'kode_ems'      => $request->ems_ibu // Sinkron EMS Ibu
        ]);
    }

    /**
     * SIMPAN DATA KITTEN (EMS & Registry Fix)
     */
    private function saveKittenData($matting, $data, $index, $request)
    {
        $newCat = Cat::create([
            'nama_kucing'     => $data['nama'],
            'ras'             => $matting->dam->ras ?? 'Persian',
            'jenis_kelamin'   => $data['jenis_kelamin'],
            'induk_jantan_id' => $matting->sire_id,
            'induk_betina_id' => $matting->dam_id,
            'status'          => 'Kitten',
            'tanggal_lahir'   => $data['tgl_lahir'],
            'kode_ems'        => $data['kode_ems'] ?? null,
            'registry'        => $data['registry'] ?? [],
            'pic_id'          => auth()->id(),
            'lokasi_kandang'  => $matting->dam->lokasi_kandang ?? 'Lorong',
        ]);

        $kitten = new Kitten([
            'cat_id'        => $newCat->id,
            'matting_id'    => $matting->id,
            'nama'          => $data['nama'],
            'tgl_lahir'     => $data['tgl_lahir'],
            'jenis_kelamin' => $data['jenis_kelamin'],
            'kode_ems'      => $data['kode_ems'] ?? null,
            'is_pedigree'   => isset($data['is_pedigree']),
            'registry'      => $data['registry'] ?? [],
        ]);

        $this->handlePedigreeUploads($kitten, $index, $request);
        $kitten->save();
    }

    private function handlePedigreeUploads($kitten, $index, $request)
    {
        for ($i = 1; $i <= 4; $i++) {
            $field = "foto_ped_$i";
            if ($request->hasFile("kittens.$index.$field")) {
                if ($kitten->$field) Storage::disk('public')->delete($kitten->$field);
                $kitten->$field = $request->file("kittens.$index.$field")->store('kittens/pedigrees', 'public');
            }
        }
    }

    public function destroy(Matting $matting): RedirectResponse
{
    Gate::authorize('check-access', ['matting', 'delete']);
    return DB::transaction(function () use ($matting) {
        try {
            $pairName = ($matting->sire->nama_kucing ?? 'Sire') . ' x ' . ($matting->dam->nama_kucing ?? 'Dam');

            // 1. Loop setiap data anak yang terhubung
            foreach ($matting->kittens as $kitten) {
                if ($kitten->cat_id) {
                    $cat = Cat::find($kitten->cat_id);
                    
                    if ($cat) {
                        // Cek apakah anak ini punya data medis atau riwayat berat
                        $hasMedical = $cat->treatments()->exists();
                        $hasWeight = $cat->weightHistories()->exists();

                        if ($hasMedical || $hasWeight) {
                            // JIKA ADA DATA TERKAIT, BATALKAN DAN BERI INFO
                            return back()->with('error', "Gagal menghapus! Anak ({$cat->nama_kucing}) sudah memiliki data Rekam Medis/Berat Badan. Hapus data medis anak tersebut terlebih dahulu.");
                        }

                        $cat->delete();
                    }
                }
                $kitten->delete();
            }

            // 2. Hapus data Matting utama
            $matting->delete();

            $this->logAction('MATTING_DELETED', $matting, "Menghapus riwayat breeding: $pairName");

            return redirect()->route('matting.index')->with('success', "Riwayat $pairName berhasil dihapus.");

        } catch (\Illuminate\Database\QueryException $e) {
            // Menangkap error database (Foreign Key Constraint)
            return back()->with('error', "Sistem tidak dapat menghapus data ini karena integritas database terganggu. Silakan periksa data anak yang terkait.");
        }
    });
}
    private function validateMatting(Request $request)
    {
        return $request->validate([
            'sire_id'           => 'required|exists:cats,id',
            'dam_id'            => 'required|exists:cats,id',
            'tgl_kawin_awal'    => 'required|date',
            'status'            => 'required|in:proses,berhasil,gagal',
            'ems_bapak'         => 'nullable|string', 
            'ems_ibu'           => 'nullable|string',
            'no_pedigree_bapak' => 'nullable|string',
            'no_pedigree_ibu'   => 'nullable|string',
            'no_microchip_bapak'=> 'nullable|string',
            'no_microchip_ibu'  => 'nullable|string',
            'kittens'           => 'nullable|array',
            'kittens.*.nama'    => 'required_with:kittens|string',
            'kittens.*.kode_ems'=> 'nullable|string',
            'kittens.*.registry'=> 'nullable|array',
        ]);
    }
}