<?php

namespace App\Http\Controllers;

use App\Models\Medicine;
use App\Traits\LogsActivity;
use Illuminate\Http\Request;
use Illuminate\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Facades\Storage;
use Maatwebsite\Excel\Facades\Excel;
use App\Imports\MedicineImport;
use App\Exports\MedicineTemplateExport;

class MedicineController extends Controller
{
    use LogsActivity;

    /**
     * Tampilkan daftar obat-obatan (Index).
     */
    public function index(Request $request): View
    {
        $query = Medicine::query();

        if ($request->filled('search')) {
            $query->where('nama_obat', 'like', '%' . $request->search . '%');
        }

        $medicines = $query->latest()->paginate(10);

        return view('pages.inventory.medicines.index', compact('medicines'));
    }

    /**
     * Tampilkan form tambah obat.
     */
    public function create(): View
    {
        return view('pages.inventory.medicines.create');
    }

    /**
     * Simpan data obat baru.
     */
    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'nama_obat'    => 'required|string|max:255',
            'qty'          => 'required|numeric|min:0',
            'unit'         => 'required|string|max:50',
            'expired_date' => 'nullable|date|after_or_equal:today',
            'foto_produk'  => 'nullable|image|max:1024',
        ]);

        // Catatan: Logika pembuatan slug sudah dipindah ke Model Medicine (event saving)
        // agar Controller lebih ringkas.

        if ($request->hasFile('foto_produk')) {
            $validated['foto_produk'] = $request->file('foto_produk')->store('medicines', 'public');
        }

        $medicine = Medicine::create($validated);
        
        $this->logAction('CREATED_MEDICINE', $medicine, "Menambah obat baru: {$medicine->nama_obat}");

        // FIX: Tambahkan .index agar rute terdeteksi
        return redirect()->route('inventory.medicines.index')->with('success', 'Obat berhasil ditambahkan ke inventori.');
    }

    /**
     * Tampilkan form edit obat.
     */
    public function edit(Medicine $medicine): View
    {
        return view('pages.inventory.medicines.edit', compact('medicine'));
    }

    /**
     * Update data obat.
     */
    public function update(Request $request, Medicine $medicine): RedirectResponse
    {
        $validated = $request->validate([
            'nama_obat'    => 'required|string|max:255',
            'qty'          => 'required|numeric|min:0',
            'unit'         => 'required|string|max:50',
            'expired_date' => 'nullable|date|after_or_equal:today',
            'foto_produk'  => 'nullable|image|max:1024',
        ]);

        if ($request->hasFile('foto_produk')) {
            if ($medicine->foto_produk) {
                Storage::disk('public')->delete($medicine->foto_produk);
            }
            $validated['foto_produk'] = $request->file('foto_produk')->store('medicines', 'public');
        }

        $medicine->update($validated);

        $this->logAction('UPDATED_MEDICINE', $medicine, "Memperbarui data obat: {$medicine->nama_obat}");

        // FIX: Tambahkan .index
        return redirect()->route('inventory.medicines.index')->with('success', 'Data obat berhasil diperbarui.');
    }

    /**
     * Hapus obat.
     */
    public function destroy(Medicine $medicine): RedirectResponse
    {
        if (auth()->user()->role !== 'admin') {
            abort(403, 'Hanya Admin yang diizinkan menghapus data.');
        }

        // Proteksi Integritas rekam medis
        if ($medicine->treatments()->exists()) {
            return back()->with('error', "Gagal: Obat '{$medicine->nama_obat}' sudah tercatat di rekam medis kucing.");
        }

        if ($medicine->foto_produk) {
            Storage::disk('public')->delete($medicine->foto_produk);
        }

        $medicineName = $medicine->nama_obat;

        // PENTING: Log dilakukan SEBELUM delete
        $this->logAction('DELETED_MEDICINE', $medicine, "Menghapus data obat: {$medicineName}");

        $medicine->delete();

        // FIX: Tambahkan .index
        return redirect()->route('inventory.medicines.index')->with('success', 'Data obat berhasil dihapus.');
    }

    /**
     * Fitur Impor Excel
     */
    public function batchUpload(Request $request): RedirectResponse
    {
        $request->validate(['file_excel' => 'required|mimes:xlsx,xls,csv|max:2048']);

        try {
            Excel::import(new MedicineImport, $request->file('file_excel'));
            $this->logAction('BATCH_UPLOAD', null, "Melakukan impor massal data obat");
            
            // FIX: Tambahkan .index
            return redirect()->route('inventory.medicines.index')->with('success', 'Data obat berhasil diimpor.');
        } catch (\Exception $e) {
            return back()->with('error', 'Gagal impor: ' . $e->getMessage());
        }
    }

    /**
     * Download Template Excel
     */
    public function downloadTemplate()
    {
        return Excel::download(new MedicineTemplateExport, 'template_obat_earrin_cats.xlsx');
    }
}