<?php

namespace console\services;

use Yii;
use yii\db\Query;

/**
 * 替换链接
 * @package console\services
 */
class UrlReplaceService extends BaseService
{
    /**
     * @var string
     */
    protected $search;

    /**
     * @var string
     */
    protected $replace;

    /**
     * @param string $search
     * @param string $replace
     */
    public function __construct(string $search, string $replace)
    {
        $this->setSearch($search);
        $this->setReplace($replace);
    }

    /**
     * 需要替换的表 && 字段
     * 表名 => [字段1, 字段2, ...]
     *
     * @var array
     */
    protected $tables = [
        // 商品表
        'qimall_goods' => [
            'cover_pic',
            'bannar_pic',
            'video_url',
            'video_cover_pic',
            'detail',
        ],
        // 订单详情表
        'qimall_order_detail' => [
            'pic_url'
        ],
        // 平台设置表
        'qimall_platform_setting' => [
            'value'
        ],
        // 商城设置表
        'qimall_mall_setting' => [
            'value'
        ],
        // 插件配置表
        'qimall_addons_setting' => [
            'value'
        ],
        // 会员表
        'qimall_user' => [
            'avatar_url'
        ],
        // 自定义页面
        'qimall_diy_page' => [
            'content'
        ],
        // 商品规格表
        'qimall_goods_attr' => [
            'pic_url'
        ],
    ];

    /**
     * @param string $search
     * @return void
     */
    public function setSearch(string $search)
    {
        $this->search = $search;
    }

    /**
     * @param string $replace
     * @return void
     */
    public function setReplace(string $replace)
    {
        $this->replace = $replace;
    }

    /**
     * @param string $search    搜索目标
     * @param string $replace   替换结果
     * 
     * @return boolean
     */
    public function replace()
    {
        foreach ($this->tables as $table_name => $select_fields) {
            $query = new Query();
            $batch = $query->from($table_name)
                ->select($this->getFields($select_fields))
                ->andWhere($this->getCondition($select_fields))
                ->batch(10);

            $this->batchReplace($table_name, $batch, $select_fields);
        }
    }

    /**
     * 获取查询条件
     *
     * @return array
     */
    protected function getCondition(array $fields)
    {
        $condition = ['or'];
        foreach ($fields as $field) {
            $condition[] = ['like', $field, $this->search];
        }

        return $condition;
    }

    /**
     * @param array $fields
     * @return array
     */
    protected function getFields(array $fields)
    {
        return array_merge($fields, ['id']);
    }

    protected function batchReplace($table_name, $batch, $select_fields)
    {
        foreach ($batch as $items) {
            foreach ($items as $item) {
                $update = $this->getReplaceFields($item, $select_fields);
                // 默认使用主键ID进行查询
                $this->update($table_name, ['id' => $item['id']], $update);
            }
        }
    }

    /**
     * 修改
     *
     * @param string $table
     * @param array $condition
     * @param array $update
     * @return void
     */
    protected function update($table, $condition, $update)
    {
        Yii::$app->db->createCommand()->update($table, $update, $condition)->execute();
    }

    /**
     * 获取替换字段
     *
     * @param BatchQueryResult $item
     * @param array $select_fields
     * @return array
     */
    protected function getReplaceFields($item, $select_fields)
    {
        $result = [];
        foreach ($select_fields as $field) {
            $replaced = str_replace($this->search, $this->replace, $item[$field]);
            $item[$field] != $replaced && $result[$field] = $replaced;
        }
        return $result;
    }
}