package biapprove

import (
	"encoding/json"
	biapprove "eta_gn/eta_api/models/bi_approve"
	"eta_gn/eta_api/models/bi_approve/request"
	"eta_gn/eta_api/models/bi_approve/response"
	"eta_gn/eta_api/models/bi_dashboard"
	"eta_gn/eta_api/utils"
	"fmt"
	"time"
)

// GetBiApproveFlowList 获取BI审批流列表
func GetBiApproveFlowList(condition string, pars []interface{}, startSize, pageSize int) (items []*response.BiApproveFlowItem, total int, msg string, err error) {
	total, err = biapprove.GetBiApproveFlowCountByCondition(condition, pars)
	if err != nil {
		msg = "获取审批流程列表失败"
		return
	}
	if total == 0 {
		items = make([]*response.BiApproveFlowItem, 0)
		return
	}
	flowList, err := biapprove.GetBiApproveFlowByCondition(condition, pars, startSize, pageSize)
	if err != nil {
		msg = "获取审批流程列表失败"
		return
	}
	items = toBiApproveFlowItem(flowList)
	return
}

// SaveBiApproveFlow 保存审批流
func SaveBiApproveFlow(flow *request.BiApproveFlowSaveReq) (ok bool, msg string, err error) {
	classifyInfo, err := bi_dashboard.GetBiDashboardClassifyById(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.BiApproveFlowId == 0 {
		tmp, er := biapprove.GetBiApproveFlowByClassifyId(flow.ClassifyId)
		if er != nil && !utils.IsErrNoRow(er) {
			msg = "保存审批流失败"
			err = er
			return
		}
		if tmp != nil && tmp.BiApproveFlowId > 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 := &biapprove.BiApproveFlow{
			FlowName:     flow.FlowName,
			ClassifyId:   flow.ClassifyId,
			ClassifyName: classifyInfo.BiDashboardClassifyName,
			CurrVersion:  1,
			CreateTime:   time.Now(),
			ModifyTime:   time.Now(),
		}
		biFlowNodeItems := make([]*biapprove.BiApproveNode, 0)
		for _, node := range flow.Nodes {
			biFlowNode := new(biapprove.BiApproveNode)
			biFlowNode.ApproveType = node.ApproveType
			biFlowNode.CurrVersion = t.CurrVersion
			userBytes, er := json.Marshal(node.Users)
			if er != nil {
				err = er
				msg = "保存审批流失败"
				return
			}
			biFlowNode.Users = string(userBytes)
			biFlowNode.CreatedTime = time.Now()
			biFlowNodeItems = append(biFlowNodeItems, biFlowNode)
		}
		err = t.Add(biFlowNodeItems)
		if err != nil {
			msg = "保存审批流失败"
			return
		}
		ok = true
	} else {
		resFlow, er := biapprove.GetBiApproveFlowById(flow.BiApproveFlowId)
		if er != nil {
			msg = "保存审批流失败"
			err = er
			return
		}
		ok, err = CheckDeleteBiApproveFlow(resFlow.BiApproveFlowId)
		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")

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

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

// GetBiApproveFlowDetail 获取审批流详情
func GetBiApproveFlowDetail(flowId int) (detail *response.BiApproveFlowDetailResp, msg string, err error) {
	flowInfo, err := biapprove.GetBiApproveFlowById(flowId)
	if err != nil {
		msg = "获取审批流详情失败"
		return
	}
	flowNodes, err := biapprove.GetBiApproveNodeByFlowIdAndVersionId(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
}

// DeleteBiApproveFlow 删除审批流
func DeleteBiApproveFlow(flowId int) (ok bool, msg string, err error) {
	ok, err = CheckDeleteBiApproveFlow(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 := &biapprove.BiApproveFlow{
		BiApproveFlowId: flowId,
	}
	err = t.Delete()
	if err != nil {
		msg = "删除审批流失败"
		return
	}
	ok = true
	return
}

// CheckDeleteBiApproveFlow 检查是否可以删除审批流
func CheckDeleteBiApproveFlow(flowId int) (ok bool, err error) {
	flowInfo, err := biapprove.GetBiApproveFlowById(flowId)
	if err != nil {
		return
	}
	// 检查是否存在还未审批的Bi看报
	approveList, err := biapprove.GetBiApproveByFlowIdAndVersionId(flowInfo.BiApproveFlowId, flowInfo.CurrVersion)
	if err != nil {
		return
	}
	for _, v := range approveList {
		if v.State == BiApproveStateApproving {
			return false, nil
		}
	}

	ok = true
	return
}

func toBiApproveFlowItem(src []*biapprove.BiApproveFlow) (res []*response.BiApproveFlowItem) {
	res = make([]*response.BiApproveFlowItem, 0, len(src))
	for _, item := range src {
		res = append(res, &response.BiApproveFlowItem{
			BiApproveFlowId: item.BiApproveFlowId,
			FlowName:        item.FlowName,
			ClassifyId:      item.ClassifyId,
			ClassifyName:    item.ClassifyName,
			CurrVersion:     item.CurrVersion,
			CreateTime:      item.CreateTime.Format(utils.FormatDateTime),
			ModifyTime:      item.ModifyTime.Format(utils.FormatDateTime),
		})
	}
	return
}

func FormatFlowAndNodesItem2Detail(flowItem *biapprove.BiApproveFlow, nodeItems []*biapprove.BiApproveNode) (detail *response.BiApproveFlowDetailResp, err error) {
	if flowItem == nil {
		return
	}
	detail = new(response.BiApproveFlowDetailResp)
	detail.BiApproveFlowId = flowItem.BiApproveFlowId
	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.BiApproveNodeItem, 0)
	for _, v := range nodeItems {
		t, e := FormatBiApproveNode2Item(v)
		if e != nil {
			err = fmt.Errorf("format node err: %s", e.Error())
			return
		}
		detail.Nodes = append(detail.Nodes, t)
	}
	return
}

func ModifyBiApproveFlowClassify(classifyId int, classifyName string) (err error) {
	flow, err := biapprove.GetBiApproveFlowByClassifyId(classifyId)
	if err != nil && !utils.IsErrNoRow(err) {
		return
	}
	if utils.IsErrNoRow(err) {
		err = nil
		return
	}
	if classifyName != "" && flow.ClassifyName != classifyName {
		err = biapprove.UpdateFlowClassifyName(classifyId, classifyName)
	}
	return
}