<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use App\Http\Requests\Admin\StoreCategoryRequest;
use App\Models\Category;
use App\Services\KnowledgeBase\AuditService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Illuminate\View\View;

class CategoryController extends Controller
{
    public function __construct(
        private readonly AuditService $auditService
    ) {}

    public function index(): View
    {
        $categories = Category::withCount([
                'documents as total_documents',
                'documents as active_documents' => fn($q) => $q->where('is_active', true),
                'knowledgeItems as total_knowledge_items',
            ])
            ->ordered()
            ->withTrashed()
            ->paginate(20);

        return view('admin.categories.index', compact('categories'));
    }

    public function create(): View
    {
        return view('admin.categories.create');
    }

    public function store(StoreCategoryRequest $request): RedirectResponse
    {
        $data = $request->validated();

        if (empty($data['slug'])) {
            $data['slug'] = Str::slug($data['name']);
        }

        $data['created_by'] = auth()->id();

        $category = Category::create($data);

        $this->auditService->categoryCreated($category);

        return redirect()
            ->route('admin.categories.index')
            ->with('success', "Kategori '{$category->name}' berjaya dicipta.");
    }

    public function edit(Category $category): View
    {
        return view('admin.categories.edit', compact('category'));
    }

    public function update(StoreCategoryRequest $request, Category $category): RedirectResponse
    {
        $data = $request->validated();

        if (empty($data['slug'])) {
            $data['slug'] = Str::slug($data['name']);
        }

        $category->update($data);

        return redirect()
            ->route('admin.categories.index')
            ->with('success', "Kategori '{$category->name}' berjaya dikemaskini.");
    }

    public function toggleStatus(Category $category): RedirectResponse
    {
        $category->update(['is_active' => !$category->is_active]);

        $status = $category->is_active ? 'diaktifkan' : 'dinyahaktifkan';

        return back()->with('success', "Kategori '{$category->name}' telah {$status}.");
    }

    public function destroy(Category $category): RedirectResponse
    {
        // Semak sama ada ada dokumen aktif dalam kategori ini
        if ($category->documents()->where('is_active', true)->exists()) {
            return back()->with('error',
                'Kategori tidak boleh dipadam kerana masih ada dokumen aktif di dalamnya.'
            );
        }

        $category->delete(); // SoftDelete

        return redirect()
            ->route('admin.categories.index')
            ->with('success', "Kategori '{$category->name}' telah dipadam.");
    }
}