<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Models\Unit;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\View\View;

class UnitController extends Controller
{
    public function index(): View
    {
        $units = Unit::orderBy('name')->get();
        return view('admin.units.index', compact('units'));
    }

    public function create(): View
    {
        return view('admin.units.create');
    }

    public function store(Request $request): RedirectResponse
    {
        $data = $request->validate([
            'name' => 'required|string|max:100|unique:units,name',
        ]);

        Unit::create($data);

        return redirect()->route('admin.units.index')
            ->with('success', 'Unit created successfully!');
    }

    public function edit(Unit $unit): View
    {
        return view('admin.units.edit', compact('unit'));
    }

    public function update(Request $request, Unit $unit): RedirectResponse
    {
        $data = $request->validate([
            'name' => 'required|string|max:100|unique:units,name,' . $unit->id,
        ]);

        $unit->update($data);

        return redirect()->route('admin.units.index')
            ->with('success', 'Unit updated successfully!');
    }

    public function destroy(Unit $unit): RedirectResponse
    {
        // Check if unit is being used by any products
        if ($unit->products()->count() > 0) {
            return redirect()->route('admin.units.index')
                ->with('error', 'Cannot delete unit. It is being used by ' . $unit->products()->count() . ' product(s).');
        }

        $unit->delete();

        return redirect()->route('admin.units.index')
            ->with('success', 'Unit deleted successfully!');
    }
}