<?php
/**
 * Created by PhpStorm.
 * User: zhonglei
 * Date: 17/10/14
 * Time: 16:12
 */

namespace Apicp\Controller\CourseData;

use Common\Common\Constant;
use Common\Model\CourseClassModel;
use Common\Model\CourseArticleModel;

class ClassDataController extends \Apicp\Controller\AbstractController
{
    /**
     * ClassData
     * @author zhonglei
     * @desc 课程分布情况报表接口
     * @return array
            array(
                'top' => array( // 一级分类数据
                    array(
                        'name' => '分类A', // 分类名称
                        'value' => 80, // 课程数
                    ),
                ),
                'child' => array( // 二级分类数据
                    array(
                        'name' => '分类B', // 分类名称
                        'value' => 20, // 课程数
                    ),
                ),
                'total' => 100, // 课程总数
            )
     */
    public function Index_post()
    {
        $this->_result = [
            'top' => [],
            'child' => [],
            'total' => 0,
        ];

        // 获取分类数据
        $classModel = new CourseClassModel();
        $class_list = $classModel->list_all();

        if (empty($class_list)) {
            return;
        }

        $class_data = array_combine_by_key($class_list, 'class_id');

        // 格式化分类数据
        foreach ($class_data as $class_id => $class) {
            $class_data[$class['parent_id']]['children'][$class_id] = &$class_data[$class_id];
        }

        // 一级分类ID数组
        $top_ids = array_keys($class_data[0]['children']);
        // 二级分类ID数组
        $child_ids = [];

        foreach ($top_ids as $top_id) {
            if (isset($class_data[$top_id]['children'])) {
                $child_ids = array_merge($child_ids, array_keys($class_data[$top_id]['children']));
            }
        }

        $list = [
            'top' => $top_ids,
            'child' => $child_ids,
        ];

        // 获取课程分类包含课程门数数据
        $articleModel = new CourseArticleModel();
        $class_total_list = $articleModel->listClassData(['course_type' => Constant::COURSE_TYPE_NORMAL]);
        $class_totals = array_combine_by_key($class_total_list, 'class_id');

        foreach ($list as $k => $class_ids) {
            // 遍历一级分类ID和二级分类ID
            foreach ($class_ids as $class_id) {
                $ids = [];
                $this->_getSelfChildId($class_data[$class_id], $ids);
                $total = 0;

                // 遍历自身ID和所有子分类ID，取出分类下课程总数
                foreach ($ids as $id) {
                    if (isset($class_totals[$id])) {
                        $total += $class_totals[$id]['total'];
                    }
                }

                $this->_result[$k][] = [
                    'name' => $class_data[$class_id]['class_name'],
                    'value' => $total,
                ];
            }
        }

        // 课程总数
        $this->_result['total'] = array_sum(array_column($class_total_list, 'total'));
    }

    /**
     * 获取分类自身ID和所有子分类ID
     * @author zhonglei
     * @param array $class 分类数据
     * @param array $ids 分类自身ID和所有子分类ID数组（引用）
     * @return void
     */
    private function _getSelfChildId($class, &$ids)
    {
        $ids[] = $class['class_id'];

        // 包含子级分类
        if (isset($class['children'])) {
            foreach ($class['children'] as $child) {
                $this->_getSelfChildId($child, $ids);
            }
        }
    }
}