<?php

namespace App\Http\Controllers;

use App\Models\Supply;
use App\Models\Category;
use App\Traits\LogsActivity;
use Illuminate\Http\Request;
use Illuminate\View\View;
use Illuminate\Http\RedirectResponse;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\DB;

class SupplyController extends Controller
{
    use LogsActivity;

    /**
     * Tampilkan daftar perlengkapan.
     */
   public function index(Request $request): View
{
    // 1. Proteksi Akses (Sesuai Matriks Role Management)
    Gate::authorize('check-access', ['supplies', 'read']);

    $now = now();
    $query = Supply::with('category');

    // 2. FILTER KHUSUS (SINKRONISASI DENGAN DASHBOARD)
    if ($request->filled('filter')) {
        $filter = $request->get('filter');

        if ($filter === 'expired') {
            // Menampilkan perlengkapan yang sudah kadaluwarsa
            $query->whereNotNull('expired_at')->where('expired_at', '<', $now);
        } elseif ($filter === 'expiring_soon') {
            // Menampilkan yang kadaluwarsa dalam 7 hari kedepan
            $query->whereNotNull('expired_at')
                  ->whereBetween('expired_at', [$now, $now->copy()->addDays(7)]);
        } elseif ($filter === 'low_stock') {
            // Menampilkan stok kritis
            $query->where('qty', '<=', 5);
        }
    }

    // 3. SEARCH GLOBAL (Mencari di Nama, Kategori, dan Unit)
    if ($request->filled('search')) {
        $search = $request->search;
        $query->where(function($q) use ($search) {
            $q->where('nama_perlengkapan', 'like', "%{$search}%")
              ->orWhere('kategori', 'like', "%{$search}%")
              ->orWhere('unit', 'like', "%{$search}%")
              ->orWhereHas('category', function($sub) use ($search) {
                  $sub->where('name', 'like', "%{$search}%");
              });
        });
    }

    // 4. LOGIKA SORTING DINAMIS (Menambahkan expired_at dalam daftar sort)
    $allowedSorts = ['nama_perlengkapan', 'qty', 'kategori', 'expired_at', 'created_at'];
    $sort = in_array($request->get('sort'), $allowedSorts) ? $request->get('sort') : 'nama_perlengkapan';
    $direction = strtolower($request->get('direction')) === 'desc' ? 'desc' : 'asc';

    // Eksekusi Query dengan Pagination
    $supplies = $query->orderBy($sort, $direction)
                      ->paginate(15)
                      ->withQueryString();

    // 5. STATISTIK RINGKAS (Komprehensif)
    $totalStock = Supply::sum('qty');
    $lowStockCount = Supply::where('qty', '<=', 5)->count();
    
    // Hitung item yang expired (Wajib ada kolom expired_at di database)
    $expiredCount = Supply::whereNotNull('expired_at')
                        ->where('expired_at', '<', $now)
                        ->count();

    $totalItems = Supply::count();

    return view('pages.inventory.supplies.index', compact(
        'supplies', 
        'totalStock', 
        'lowStockCount', 
        'expiredCount', // Variabel statistik baru
        'totalItems'
    ));
}

    /**
     * Tampilkan form tambah.
     */
    public function create(): View
    {
        // Category ditentukan otomatis oleh Model Supply
        return view('pages.inventory.supplies.create');
    }

    /**
     * Simpan data perlengkapan baru.
     */
    public function store(Request $request): RedirectResponse
    {
        $validated = $request->validate([
            'nama_perlengkapan' => 'required|string|max:255',
            'qty'               => 'required|numeric|min:0',
            'unit'              => 'required|string|max:50',
            'category_id'       => 'nullable|exists:categories,id', 
            'foto_produk'       => 'nullable|image|max:1024',
        ]);

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

        $supply = Supply::create($validated);
        
        $this->logAction('CREATED_SUPPLY', $supply, "Menambah perlengkapan: {$supply->nama_perlengkapan}");

        // FIX: Menggunakan .index agar tidak RouteNotFound
        return redirect()->route('inventory.supplies.index')->with('success', 'Perlengkapan berhasil ditambahkan.');
    }

    /**
     * Tampilkan form edit.
     */
    public function edit(Supply $supply): View
    {
        $categories = Category::all();
        return view('pages.inventory.supplies.edit', compact('supply', 'categories'));
    }

    /**
     * Update data perlengkapan.
     */
    public function update(Request $request, Supply $supply): RedirectResponse
    {
        $validated = $request->validate([
            'nama_perlengkapan' => 'required|string|max:255',
            'qty'               => 'required|numeric|min:0',
            'unit'              => 'required|string|max:50',
            'category_id'       => 'nullable|exists:categories,id',
            'foto_produk'       => 'nullable|image|max:1024',
        ]);

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

        $supply->update($validated);

        $this->logAction('UPDATED_SUPPLY', $supply, "Memperbarui data perlengkapan: {$supply->nama_perlengkapan}");

        // FIX: Menggunakan .index
        return redirect()->route('inventory.supplies.index')->with('success', 'Data perlengkapan berhasil diperbarui.');
    }

    /**
     * Hapus data perlengkapan.
     */
   public function destroy(Supply $supply): RedirectResponse
{
    // 1. OTORISASI DINAMIS (Inilah perbaikan untuk akses Supervisor)
    // Menggunakan Gate 'check-access' agar sinkron dengan Role Management Anda
    Gate::authorize('check-access', ['supplies', 'delete']);

    try {
        DB::beginTransaction();

        $supplyName = $supply->nama_perlengkapan;

        // 2. PEMBERSIHAN FILE (STORAGE)
        if ($supply->foto_produk && Storage::disk('public')->exists($supply->foto_produk)) {
            Storage::disk('public')->delete($supply->foto_produk);
        }

        // 3. AUDIT TRAIL
        // Dicatat sebelum delete agar konteks data $supply masih tersedia secara lengkap
        if (method_exists($this, 'logAction')) {
            $this->logAction('DELETE', 'Inventory', "Menghapus perlengkapan: {$supplyName}");
        }

        // 4. EKSEKUSI HAPUS
        $supply->delete();

        DB::commit();

        return redirect()->route('inventory.supplies.index')
            ->with('success', "Perlengkapan '{$supplyName}' berhasil dihapus dari sistem.");

    } catch (\Exception $e) {
        DB::rollBack();
        
        // Reporting error jika terjadi kegagalan sistem
        return back()->with('error', 'Gagal menghapus data. Silakan coba lagi atau hubungi IT.');
    }
}
}