package services

import (
	"eta_gn/eta_api/models"
	"eta_gn/eta_api/utils"
	"fmt"
	"sync"
)

// GetPptReportClassifyTreeRecursive 递归获取ppt报告分类树
func GetPptReportClassifyTreeRecursive(list []*models.Classify, parentId int, classifyPpt map[int][]*models.PptReportItem) []*models.PptReportClassifyItem {
	res := make([]*models.PptReportClassifyItem, 0)
	for _, v := range list {
		if v.ParentId == parentId {
			t := new(models.PptReportClassifyItem)
			t.Id = v.Id
			t.ClassifyName = v.ClassifyName
			t.Sort = v.Sort
			t.ParentId = v.ParentId
			t.Enabled = v.Enabled
			t.Level = v.Level
			t.HasChild = v.HasChild
			t.ClassifyType = v.ClassifyType
			t.ReportNum = v.ReportNum
			t.PptList = classifyPpt[v.Id]
			t.Child = GetPptReportClassifyTreeRecursive(list, v.Id, classifyPpt)
			res = append(res, t)
		}
	}
	return res
}

// 更新分类报告计数加个锁
var classifyReportNumLock sync.Mutex

// UpdateClassifyReportNum 更新分类报告计数
func UpdateClassifyReportNum(classifyId int) (err error) {
	classifyReportNumLock.Lock()
	defer func() {
		if err != nil {
			utils.FileLog.Info(fmt.Sprintf("更新分类报告计数失败, %v", err))
		}
		classifyReportNumLock.Unlock()
	}()

	classifyItem, e := models.GetClassifyById(classifyId)
	if e != nil {
		err = fmt.Errorf("获取分类失败, %v", e)
		return
	}

	// 更新分类报告数
	var total int
	{
		reportOb := new(models.Report)
		var cond string
		switch classifyItem.Level {
		case 1:
			cond += ` AND classify_id_first = ?`
		case 2:
			cond += ` AND classify_id_second = ?`
		case 3:
			cond += ` AND classify_id_third = ?`
		}
		pars := make([]interface{}, 0)
		pars = append(pars, classifyId)
		count, e := reportOb.GetCountByCondition(cond, pars)
		if e != nil {
			err = fmt.Errorf("获取报告计数失败, %v", e)
			return
		}
		total += count
	}
	{
		pptOb := new(models.PptV2)
		cond := ` AND classify_id = ?`
		pars := make([]interface{}, 0)
		pars = append(pars, classifyId)
		count, e := pptOb.GetCountByCondition(cond, pars)
		if e != nil {
			err = fmt.Errorf("获取PPT报告计数失败, %v", e)
			return
		}
		total += count
	}
	classifyItem.ReportNum = total
	if e = classifyItem.UpdateClassify([]string{"ReportNum"}); e != nil {
		err = fmt.Errorf("更新分类报告计数失败, %v", e)
		return
	}

	// 获取所有分类, 更新父级, 无父级忽略
	if classifyItem.ParentId <= 0 {
		return
	}
	classifyOb := new(models.Classify)
	classifies, e := classifyOb.GetItemsByCondition(``, make([]interface{}, 0), []string{}, "")
	if e != nil {
		err = fmt.Errorf("获取报告列表失败, %v", e)
		return
	}
	classifyIdMap := make(map[int]*models.Classify)
	classifyParentChildMap := make(map[int][]*models.Classify)
	for _, v := range classifies {
		classifyIdMap[v.Id] = v
		if v.ParentId <= 0 {
			continue
		}
		if classifyParentChildMap[v.ParentId] == nil {
			classifyParentChildMap[v.ParentId] = make([]*models.Classify, 0)
		}
		classifyParentChildMap[v.ParentId] = append(classifyParentChildMap[v.ParentId], v)
	}

	// 递归获取需要更新的父级报告数
	updateClassifies := CountParentClassifyReportNumRecursive(classifies, classifyItem.ParentId, classifyIdMap, classifyParentChildMap)
	if len(updateClassifies) == 0 {
		return
	}
	for _, v := range updateClassifies {
		if e = v.UpdateClassify([]string{"ReportNum"}); e != nil {
			err = fmt.Errorf("更新父级分类报告计数失败, %v", e)
			return
		}
	}
	return
}

// CountParentClassifyReportNumRecursive 递归统计父级分类报告数
func CountParentClassifyReportNumRecursive(list []*models.Classify, parentId int, classifyIdMap map[int]*models.Classify, classifyParentChildMap map[int][]*models.Classify) []*models.Classify {
	res := make([]*models.Classify, 0)
	for _, v := range list {
		// 找父级
		if v.Id != parentId {
			continue
		}
		parentItem := classifyIdMap[v.Id]
		if parentItem == nil {
			break
		}

		// 合计所有直系子分类报告数
		children := classifyParentChildMap[v.Id]
		if len(children) == 0 {
			break
		}
		var t int
		for _, child := range children {
			t += child.ReportNum
		}
		parentItem.ReportNum = t
		res = append(res, parentItem)

		// 继续向上统计父级
		if v.ParentId <= 0 {
			break
		}
		parents := CountParentClassifyReportNumRecursive(list, v.ParentId, classifyIdMap, classifyParentChildMap)
		if len(parents) == 0 {
			break
		}
		res = append(res, parents...)
	}
	return res
}