<?php

namespace app\admin\controller\product;

use app\common\controller\Backend;
use Exception;
use think\Db;
use app\common\model\ProductArea;
use think\exception\DbException;
use think\exception\PDOException;
use think\exception\ValidateException;

/**
 * 商品列管理
 *
 * @icon fa fa-circle-o
 */
class Lists extends Backend
{
    /**
     * Lists模型对象
     * @var \app\admin\model\product\Lists
     */
    protected $model = null;
    protected $productArea = null;

    public function _initialize()
    {
        parent::_initialize();
        $this->productArea = new ProductArea;
        $this->model = new \app\common\model\ProductLists;

    }


    /**
     * 查看
     *
     * @return string|Json
     * @throws \think\Exception
     * @throws DbException
     */
    public function index()
    {
        //设置过滤方法
        $this->request->filter(['strip_tags', 'trim']);
        if (false === $this->request->isAjax()) {
            return $this->view->fetch();
        }
        //如果发送的来源是 Selectpage，则转发到 Selectpage
        if ($this->request->request('keyField')) {
            return $this->selectpage();
        }
        [$where, $sort, $order, $offset, $limit] = $this->buildparams();
        $list = $this->model->with('products')
            ->where($where)
            ->order($sort, $order)
            ->paginate($limit);
        $result = ['total' => $list->total(), 'rows' => $list->items()];
        return json($result);
    }


    /**
     * 添加
     *
     * @return string
     * @throws \think\Exception
     */
    public function add()
    {
        if (false === $this->request->isPost()) {
            return $this->view->fetch();
        }
        $params = $this->request->post('row/a');
        if (empty($params)) {
            $this->error(__('Parameter %s can not be empty', ''));
        }
        $params = $this->preExcludeFields($params);

        if ($this->dataLimit && $this->dataLimitFieldAutoFill) {
            $params[$this->dataLimitField] = $this->auth->id;
        }
        $result = false;
        Db::startTrans();
        try {
            //是否采用模型验证
            if ($this->modelValidate) {
                $name = str_replace("\\model\\", "\\validate\\", get_class($this->model));
                $validate = is_bool($this->modelValidate) ? ($this->modelSceneValidate ? $name . '.add' : $name) : $this->modelValidate;
                $this->model->validateFailException()->validate($validate);
            }
            $areaArr = json_decode($params['product_area'], true);
            if(empty($areaArr)) throw new ValidateException('请添加商品关联地区');
            if(self::isEqualArea($areaArr) == false) throw new ValidateException('该商品地区存在重复');
            unset($params['product_area']);
            //商品
            $add   = $this->model->create($params);
            foreach ($areaArr as $row) {
                $row['product_id'] = $add->id;
                $result = $this->productArea::create($row);
            }
            Db::commit();
        } catch (ValidateException|PDOException|Exception $e) {
            Db::rollback();
            $this->error($e->getMessage());
        }
        if ($result === false) {
            $this->error(__('No rows were inserted'));
        }
        $this->success();
    }

    /**
     * 编辑
     *
     * @param $ids
     * @return string
     * @throws DbException
     * @throws \think\Exception
     */
    public function edit($ids = null)
    {
        $row = $this->model->get($ids);
        if (!$row) {
            $this->error(__('No Results were found'));
        }
        $adminIds = $this->getDataLimitAdminIds();
        if (is_array($adminIds) && !in_array($row[$this->dataLimitField], $adminIds)) {
            $this->error(__('You have no permission'));
        }
        if (false === $this->request->isPost()) {

            $area = $this->productArea::where('product_id', $ids)->select();
            $this->view->assign('row', $row);
            $this->view->assign('area', json_encode($area, JSON_UNESCAPED_UNICODE) );
            return $this->view->fetch();
        }
        $params = $this->request->post('row/a');
        if (empty($params)) {
            $this->error(__('Parameter %s can not be empty', ''));
        }
        $params = $this->preExcludeFields($params);
        $result = false;
        Db::startTrans();
        try {
            //是否采用模型验证
            if ($this->modelValidate) {
                $name = str_replace("\\model\\", "\\validate\\", get_class($this->model));
                $validate = is_bool($this->modelValidate) ? ($this->modelSceneValidate ? $name . '.edit' : $name) : $this->modelValidate;
                $row->validateFailException()->validate($validate);
            }
            
            $areaArr = json_decode($params['product_area'], true);
            if(empty($areaArr)) throw new ValidateException('请添加商品关联地区');
            if(self::isEqualArea($areaArr) == false) throw new ValidateException('该商品地区存在重复');
            unset($params['product_area']);

            $row->allowField(true)->save($params);
            $this->productArea::where('product_id', $ids)->delete();
            foreach ($areaArr as $row) {
                $row = (array)$row;
                $row['product_id'] = $ids;
                $result = $this->productArea::create($row);
            }
            Db::commit();
        } catch (ValidateException|PDOException|Exception $e) {
            Db::rollback();
            $this->error($e->getMessage());
        }
        if (false === $result) {
            $this->error(__('No rows were updated'));
        }
        $this->success();
    }


    //判断是否存在相同元素
    private static function isEqualArea(array $areaArr): bool
    {   
        $result = array();
        if(count($areaArr) > 1){
            foreach ($areaArr as $value) {
                $value = (array)$value;
                foreach ($result as $v) {
                    if ($value['province'] == $v['province'] && 
                    $value['city'] == $v['city'] && 
                    $value['area'] == $v['area'] && 
                     $value['county'] == $v['county']) {
                        return false;
                    }
                }
                $result[] = $value;
            }
        }
        return true;
    }

}