<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Http\Requests\Admin\StoreBrandRequest;
use App\Http\Requests\Admin\UpdateBrandRequest;
use App\Models\Brand;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;
use Illuminate\View\View;

class BrandController extends Controller
{
    public function index(Request $request): View
    {
        $query = Brand::withCount('products');

        if ($request->filled('search')) {
            $search = $request->get('search');
            $query->where('name', 'like', "%{$search}%");
        }

        if ($request->filled('status')) {
            $status = $request->get('status');
            if ($status === 'active') {
                $query->where('is_active', true);
            } elseif ($status === 'inactive') {
                $query->where('is_active', false);
            }
        }

        $brands = $query
            ->orderBy('name')
            ->paginate(10)
            ->withQueryString();

        return view('admin.brands.index', compact('brands'));
    }

    public function create(): View
    {
        return view('admin.brands.create');
    }

    public function store(StoreBrandRequest $request): RedirectResponse
    {
        $data = $request->validated();
        
        // Auto-generate slug from name if not provided
        if (empty($data['slug'])) {
            $data['slug'] = Str::slug($data['name']);
            
            // Ensure slug is unique
            $originalSlug = $data['slug'];
            $counter = 1;
            while (Brand::where('slug', $data['slug'])->exists()) {
                $data['slug'] = $originalSlug . '-' . $counter;
                $counter++;
            }
        }

        // Handle logo upload
        if ($request->hasFile('logo')) {
            $data['logo_path'] = $request->file('logo')->store('brands', 'public');
        }

        Brand::create($data);

        return redirect()->route('admin.brands.index')->with('success', 'Brand created successfully!');
    }

    public function edit(Brand $brand): View
    {
        return view('admin.brands.edit', compact('brand'));
    }

    public function update(UpdateBrandRequest $request, Brand $brand): RedirectResponse
    {
        $data = $request->validated();

        // Auto-generate slug if name changed
        if (isset($data['name']) && $data['name'] !== $brand->name) {
            $newSlug = Str::slug($data['name']);
            
            // Ensure slug is unique
            $originalSlug = $newSlug;
            $counter = 1;
            while (Brand::where('slug', $newSlug)->where('id', '!=', $brand->id)->exists()) {
                $newSlug = $originalSlug . '-' . $counter;
                $counter++;
            }
            $data['slug'] = $newSlug;
        }

        // Handle logo upload
        if ($request->hasFile('logo')) {
            // Delete old logo
            if ($brand->logo_path) {
                Storage::disk('public')->delete($brand->logo_path);
            }

            $data['logo_path'] = $request->file('logo')->store('brands', 'public');
        }

        $brand->update($data);

        return redirect()->route('admin.brands.index')->with('success', 'Brand updated successfully!');
    }

    public function destroy(Brand $brand): RedirectResponse
    {
        // Check if brand has products
        $productCount = $brand->products()->count();
        if ($productCount > 0) {
            return redirect()->route('admin.brands.index')
                ->with('error', "Cannot delete brand. It is assigned to {$productCount} product(s). Please remove or reassign products first.");
        }

        // Delete logo if exists
        if ($brand->logo_path) {
            Storage::disk('public')->delete($brand->logo_path);
        }

        $brand->delete();

        return redirect()->route('admin.brands.index')->with('success', 'Brand deleted successfully!');
    }
}