<?php

namespace App\Http\Controllers;

use App\Http\Resources\CategoryResource;
use App\Models\Category;
use App\Models\Log;
use Illuminate\Http\Request;

class CategoryController extends Controller
{
    /**
     * @OA\Get(
     *     path="/api/categories",
     *     summary="Get all categories",
     *     tags={"Categories"},
     *     @OA\Response(
     *         response=200,
     *         description="List of categories",
     *         @OA\JsonContent(
     *             type="array",
     *             @OA\Items(ref="#/components/schemas/CategoryResource")
     *         )
     *     )
     * )
     */
    public function index()
    {
        $categories = Category::withCount('user_tests', 'questions')->get();
        return CategoryResource::collection($categories);
    }

    /**
     * @OA\Post(
     *     path="/api/categories",
     *     summary="Create a new category (only admin)",
     *     tags={"Categories"},
     *     security={{"bearerAuth": {}}},
     *     @OA\RequestBody(
     *         required=true,
     *         @OA\JsonContent(
     *             required={"name"},
     *             @OA\Property(property="name", type="string", example="Physics")
     *         )
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="Category created successfully",
     *         @OA\JsonContent(ref="#/components/schemas/CategoryResource")
     *     ),
     *     @OA\Response(
     *         response=403,
     *         description="Forbidden"
     *     )
     * )
     */
    public function store(Request $request)
    {
        $this->authorize('create', Category::class);
        $fields = $request->validate([
            'name' => 'required|max:150'
        ]);
        $category = Category::create($fields);

        Log::writeLog("Category '" . $category->name . "' is created by " . $request->user()->username);

        return new CategoryResource($category);
    }

    /**
     * @OA\Get(
     *     path="/api/categories/{id}",
     *     summary="Get a specific category",
     *     tags={"Categories"},
     *     @OA\Parameter(
     *         name="id",
     *         in="path",
     *         required=true,
     *         description="ID of the category",
     *         @OA\Schema(type="integer", example=1)
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="Category retrieved successfully",
     *         @OA\JsonContent(ref="#/components/schemas/CategoryResource")
     *     ),
     *     @OA\Response(
     *         response=404,
     *         description="Category not found"
     *     )
     * )
     */
    public function show(Category $category)
    {
        return new CategoryResource($category->withCount('user_tests', 'questions'));
    }

    /**
     * @OA\Put(
     *     path="/api/categories/{id}",
     *     summary="Update a category (only admin)",
     *     tags={"Categories"},
     *     security={{"bearerAuth": {}}},
     *     @OA\Parameter(
     *         name="id",
     *         in="path",
     *         required=true,
     *         description="ID of the category",
     *         @OA\Schema(type="integer", example=1)
     *     ),
     *     @OA\RequestBody(
     *         required=true,
     *         @OA\JsonContent(
     *             required={"name"},
     *             @OA\Property(property="name", type="string", example="Physics Updated")
     *         )
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="Category updated successfully",
     *         @OA\JsonContent(ref="#/components/schemas/CategoryResource")
     *     ),
     *     @OA\Response(
     *         response=403,
     *         description="Forbidden"
     *     ),
     *     @OA\Response(
     *         response=404,
     *         description="Category not found"
     *     )
     * )
     */
    public function update(Request $request, Category $category)
    {
        $this->authorize('update', $category);
        $fields = $request->validate([
            'name' => 'required|max:150'
        ]);
        $old_category_name = $category->name;
        $category->update($fields);

        Log::writeLog("Category '$old_category_name' is renamed to '" . $category->name ."' by " . $request->user()->username);

        return new CategoryResource($category);
    }

    /**
     * @OA\Delete(
     *     path="/api/categories/{id}",
     *     summary="Delete a category (only admin)",
     *     tags={"Categories"},
     *     security={{"bearerAuth": {}}},
     *     @OA\Parameter(
     *         name="id",
     *         in="path",
     *         required=true,
     *         description="ID of the category",
     *         @OA\Schema(type="integer", example=1)
     *     ),
     *     @OA\Response(
     *         response=200,
     *         description="Category deleted successfully",
     *         @OA\JsonContent(
     *             @OA\Property(property="message", type="string", example="The category was deleted")
     *         )
     *     ),
     *     @OA\Response(
     *         response=403,
     *         description="Forbidden"
     *     ),
     *     @OA\Response(
     *         response=404,
     *         description="Category not found"
     *     )
     * )
     */
    public function destroy(Request $request, Category $category)
    {
        $this->authorize('delete', $category);
        $category->delete();

        Log::writeLog("Category '" . $category->name . "' is deleted by " . $request->user()->username);

        return ['message' => 'The category was deleted'];
    }
}