<?php

namespace App\Admin\Controllers;

use App\Models\Category;
use Illuminate\Http\Request;
use Validator;

class CategoryController extends Controller
{

    public function index(Request $request)
    {
        $title          = $request->title;
        $parent_id      = $request->get('parent_id', 0) ?: 0;
        $orderField     = $request->orderField;
        $orderDirection = $request->orderDirection;
        $numPerPage     = $request->numPerPage ?: 30;

        $categories = Category::where('parent_id', $parent_id)
            ->when($title, function ($query) use ($title) {
                $query->where('title', 'like', "%{$title}%");
            })
            ->when($orderField, function ($query) use ($orderField, $orderDirection) {
                $query->orderBy($orderField, $orderDirection);
            })->paginate($numPerPage);

        $categoryTree = Category::with(['children'])->where('parent_id', 0)->orderBy('sort', 'asc')->get();

        return view('Admin::categories.index', compact('categoryTree', 'categories'));
    }

    public function create()
    {
        $topCates = Category::treeShow();
        return view('Admin::categories.create', compact('topCates'));
    }

    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'title' => 'required|max:16',
            'sort'  => 'required|integer',
        ], [
            'title.required' => '分类名称必须填写',
            'title.max'      => '分类名称长度应在:max以内',
            'sort.required'  => '分类排序必须填写',
            'sort.integer'   => '分类排序只能是数字',
        ]);

        if ($validator->fails()) {
            return $this->error($validator->errors()->first());
        }

        if (Category::create($request->all())) {
            return $this->success('新增分类成功', 'close');
        } else {
            return $this->error();
        }
    }

    public function edit(Category $category)
    {
        $topCates = Category::treeShow($category->id);
        return view('Admin::categories.edit', compact('topCates', 'category'));
    }

    public function update(Request $request, Category $category)
    {
        $validator = Validator::make($request->all(), [
            'title' => 'required|max:16',
            'sort'  => 'required|integer',
        ], [
            'title.required' => '分类名称必须填写',
            'title.max'      => '分类名称长度应在:max以内',
            'sort.required'  => '分类排序必须填写',
            'sort.integer'   => '分类排序只能是数字',
        ]);

        if ($validator->fails()) {
            return $this->error($validator->errors()->first());
        }

        if ($category->update($request->all())) {
            return $this->success('编辑分类成功', 'close');
        } else {
            return $this->error();
        }
    }

    public function destroy(Category $category)
    {
        $exclude_ids = [1, 2];
        if (in_array($category->id, $exclude_ids)) {
            return $this->error('此分类不能删除');
        }
        if ($category->delete()) {
            return $this->success();
        } else {
            return $this->error();
        }
    }
}