package knowledge_approve

import (
	"encoding/json"
	"eta_gn/eta_api/models/knowledge"
	knowledge_approve "eta_gn/eta_api/models/knowledge_approve"
	"eta_gn/eta_api/models/knowledge_approve/request"
	"eta_gn/eta_api/models/knowledge_approve/response"
	"eta_gn/eta_api/utils"
	"fmt"
	"sort"
	"strings"
	"time"
)

// GetKnowledgeResourceApproveFlowList 获取知识资源审批流列表
func GetKnowledgeResourceApproveFlowList(condition string, pars []interface{}, startSize, pageSize int) (items []*response.KnowledgeResourceApproveFlowItem, total int, msg string, err error) {
	total, err = knowledge_approve.GetKnowledgeResourceApproveFlowCountByCondition(condition, pars)
	if err != nil {
		msg = "获取审批流程列表失败"
		return
	}
	if total == 0 {
		items = make([]*response.KnowledgeResourceApproveFlowItem, 0)
		return
	}
	flowList, err := knowledge_approve.GetKnowledgeResourceApproveFlowByCondition(condition, pars, startSize, pageSize)
	if err != nil {
		msg = "获取审批流程列表失败"
		return
	}
	obj := new(knowledge.KnowledgeClassify)
	classifyList, err := obj.GetAllClassify(knowledge.KnowledgeResourceTypeOpinion)
	if err != nil {
		msg = "获取审批流程列表失败"
		err = fmt.Errorf("获取分类列表失败,%+v", err)
		return
	}
	sort.Slice(classifyList, func(i, j int) bool {
		if classifyList[i].Level != classifyList[j].Level {
			return classifyList[i].Level < classifyList[j].Level
		}
		return classifyList[i].ClassifyId < classifyList[j].ClassifyId
	})
	classifyMap := make(map[int]*knowledge.KnowledgeClassify)
	for _, classify := range classifyList {
		classifyMap[classify.ClassifyId] = classify
	}
	classifyPathMap := make(map[int]map[int]string)
	for _, classify := range classifyList {
		if _, ok := classifyPathMap[classify.ClassifyId]; !ok {
			classifyPathMap[classify.ClassifyId] = make(map[int]string)
		}

		currClassifyMap := classifyPathMap[classify.ClassifyId]
		currClassify := classify
		for i := classify.Level; i > 0; i-- {
			currClassifyMap[currClassify.Level] = currClassify.ClassifyName
			if currClassify.ParentId == 0 {
				break
			}
			currClassify = classifyMap[currClassify.ParentId]
		}
	}

	items = toKnowledgeResourceApproveFlowItem(flowList, classifyPathMap)
	return
}

// SaveKnowledgeResourceApproveFlow 保存审批流
func SaveKnowledgeResourceApproveFlow(flow *request.KnowledgeResourceApproveFlowSaveReq) (ok bool, msg string, err error) {
	obj := new(knowledge.KnowledgeClassify)
	_, err = obj.GetClassifyById(flow.ClassifyId)
	if err != nil {
		if utils.IsErrNoRow(err) {
			msg = "保存审批流失败, 分类不存在"
			return
		}
		msg = "保存审批流失败"
		return
	}
	if flow.KnowledgeResourceApproveFlowId == 0 {
		tmp, er := knowledge_approve.GetKnowledgeResourceApproveFlowByClassifyId(flow.ClassifyId)
		if er != nil && !utils.IsErrNoRow(er) {
			msg = "保存审批流失败"
			err = er
			return
		}
		if tmp != nil && tmp.KnowledgeResourceApproveFlowId > 0 {
			msg = "保存审批流失败, 分类下已存在审批流"
			err = fmt.Errorf("分类下已存在审批流")
			return
		}

		t := &knowledge_approve.KnowledgeResourceApproveFlow{
			FlowName:    flow.FlowName,
			ClassifyId:  flow.ClassifyId,
			CurrVersion: 1,
			CreateTime:  time.Now(),
			ModifyTime:  time.Now(),
		}
		knowledgeFlowNodeItems := make([]*knowledge_approve.KnowledgeResourceApproveNode, 0)
		for _, node := range flow.Nodes {
			knowledgeFlowNode := new(knowledge_approve.KnowledgeResourceApproveNode)
			knowledgeFlowNode.ApproveType = node.ApproveType
			knowledgeFlowNode.CurrVersion = t.CurrVersion
			userBytes, er := json.Marshal(node.Users)
			if er != nil {
				err = er
				msg = "保存审批流失败"
				return
			}
			knowledgeFlowNode.Users = string(userBytes)
			knowledgeFlowNode.CreatedTime = time.Now()
			knowledgeFlowNodeItems = append(knowledgeFlowNodeItems, knowledgeFlowNode)
		}
		err = t.Add(knowledgeFlowNodeItems)
		if err != nil {
			msg = "保存审批流失败"
			return
		}
		ok = true
	} else {
		resFlow, er := knowledge_approve.GetKnowledgeResourceApproveFlowById(flow.KnowledgeResourceApproveFlowId)
		if er != nil {
			msg = "保存审批流失败"
			err = er
			return
		}
		ok, err = CheckDeleteKnowledgeResourceApproveFlow(resFlow.KnowledgeResourceApproveFlowId)
		if err != nil {
			msg = "保存审批流失败"
			return
		}
		if !ok {
			msg = "保存审批流失败, 存在还未审批的报告"
			return
		}
		var updateCols []string
		if resFlow.FlowName != flow.FlowName {
			resFlow.FlowName = flow.FlowName
			updateCols = append(updateCols, "flow_name")
		}
		resFlow.CurrVersion += 1
		resFlow.ModifyTime = time.Now()
		updateCols = append(updateCols, "modify_time", "curr_version")

		knowledgeFlowNodeItems := make([]*knowledge_approve.KnowledgeResourceApproveNode, 0)
		for _, node := range flow.Nodes {
			knowledgeFlowNode := new(knowledge_approve.KnowledgeResourceApproveNode)
			knowledgeFlowNode.ApproveType = node.ApproveType
			knowledgeFlowNode.CurrVersion = resFlow.CurrVersion
			userBytes, er := json.Marshal(node.Users)
			if er != nil {
				err = er
				msg = "保存审批流失败"
				return
			}
			knowledgeFlowNode.Users = string(userBytes)
			knowledgeFlowNode.CreatedTime = time.Now()
			knowledgeFlowNodeItems = append(knowledgeFlowNodeItems, knowledgeFlowNode)
		}

		err = resFlow.Update(updateCols, knowledgeFlowNodeItems)
		if err != nil {
			msg = "保存审批流失败"
			return
		}
		ok = true
	}
	return
}

// GetKnowledgeResourceApproveFlowDetail 获取审批流详情
func GetKnowledgeResourceApproveFlowDetail(flowId int) (detail *response.KnowledgeResourceApproveFlowDetailResp, msg string, err error) {
	flowInfo, err := knowledge_approve.GetKnowledgeResourceApproveFlowById(flowId)
	if err != nil {
		msg = "获取审批流详情失败"
		return
	}
	flowNodes, err := knowledge_approve.GetKnowledgeResourceApproveNodeByFlowIdAndVersionId(flowId, flowInfo.CurrVersion)
	if err != nil {
		msg = "获取审批流详情失败"
		return
	}
	detail, err = FormatFlowAndNodesItem2Detail(flowInfo, flowNodes)
	if err != nil {
		msg = "获取审批流详情失败"
		return
	}
	return
}

// DeleteKnowledgeResourceApproveFlow 删除审批流
func DeleteKnowledgeResourceApproveFlow(flowId int) (ok bool, msg string, err error) {
	ok, err = CheckDeleteKnowledgeResourceApproveFlow(flowId)
	if err != nil {
		if utils.IsErrNoRow(err) {
			msg = "删除审批流失败, 审批流不存在"
			return
		}
		msg = "删除审批流失败"
		return
	}
	if !ok {
		msg = "删除审批流失败, 存在还未审批的报告"
		return
	}

	t := &knowledge_approve.KnowledgeResourceApproveFlow{
		KnowledgeResourceApproveFlowId: flowId,
	}
	err = t.Delete()
	if err != nil {
		msg = "删除审批流失败"
		return
	}
	ok = true
	return
}

// CheckDeleteKnowledgeResourceApproveFlow 检查是否可以删除审批流
func CheckDeleteKnowledgeResourceApproveFlow(flowId int) (ok bool, err error) {
	flowInfo, err := knowledge_approve.GetKnowledgeResourceApproveFlowById(flowId)
	if err != nil {
		return
	}
	// 检查是否存在还未审批的知识资源
	approveList, err := knowledge_approve.GetKnowledgeResourceApproveByFlowIdAndVersionId(flowInfo.KnowledgeResourceApproveFlowId, flowInfo.CurrVersion)
	if err != nil {
		return
	}
	for _, v := range approveList {
		if v.State == KnowledgeResourceApproveStateApproving {
			return false, nil
		}
	}

	ok = true
	return
}

func toKnowledgeResourceApproveFlowItem(src []*knowledge_approve.KnowledgeResourceApproveFlow, classifyPathMap map[int]map[int]string) (res []*response.KnowledgeResourceApproveFlowItem) {
	res = make([]*response.KnowledgeResourceApproveFlowItem, 0, len(src))
	for _, item := range src {
		classifyArr := make([]string, 0)
		for i := 1; i <= 3; i++ {
			if v, ok := classifyPathMap[item.ClassifyId][i]; ok {
				classifyArr = append(classifyArr, v)
			}
		}
		res = append(res, &response.KnowledgeResourceApproveFlowItem{
			KnowledgeResourceApproveFlowId: item.KnowledgeResourceApproveFlowId,
			FlowName:                       item.FlowName,
			ClassifyId:                     item.ClassifyId,
			ClassifyName:                   strings.Join(classifyArr, "/"),
			CurrVersion:                    item.CurrVersion,
			CreateTime:                     item.CreateTime.Format(utils.FormatDateTime),
			ModifyTime:                     item.ModifyTime.Format(utils.FormatDateTime),
		})
	}
	return
}

func FormatFlowAndNodesItem2Detail(flowItem *knowledge_approve.KnowledgeResourceApproveFlow, nodeItems []*knowledge_approve.KnowledgeResourceApproveNode) (detail *response.KnowledgeResourceApproveFlowDetailResp, err error) {
	if flowItem == nil {
		return
	}
	detail = new(response.KnowledgeResourceApproveFlowDetailResp)
	detail.KnowledgeResourceApproveFlowId = flowItem.KnowledgeResourceApproveFlowId
	detail.FlowName = flowItem.FlowName
	detail.ClassifyId = flowItem.ClassifyId
	detail.CreateTime = utils.TimeTransferString(utils.FormatDateTime, flowItem.CreateTime)
	detail.ModifyTime = utils.TimeTransferString(utils.FormatDateTime, flowItem.ModifyTime)
	detail.Nodes = make([]*response.KnowledgeResourceApproveNodeItem, 0)
	for _, v := range nodeItems {
		t, e := FormatKnowledgeResourceApproveNode2Item(v)
		if e != nil {
			err = fmt.Errorf("format node err: %s", e.Error())
			return
		}
		detail.Nodes = append(detail.Nodes, t)
	}
	return
}

// func ModifyKnowledgeResourceApproveFlowClassify(classifyId int, classifyName string) (err error) {
// 	flow, err := knowledge_approve.GetKnowledgeResourceApproveFlowByClassifyId(classifyId)
// 	if err != nil && !utils.IsErrNoRow(err) {
// 		return
// 	}
// 	if utils.IsErrNoRow(err) {
// 		err = nil
// 		return
// 	}
// 	if classifyName != "" && flow.ClassifyName != classifyName {
// 		err = knowledge_approve.UpdateFlowClassifyName(classifyId, classifyName)
// 	}
// 	return
// }