package model

import (
	"errors"
	"github.com/fonchain_enterprise/fonchain-approval/api/approval"
	"github.com/fonchain_enterprise/fonchain-approval/pkg/common/page"
	msg "github.com/fonchain_enterprise/fonchain-approval/pkg/m"
	"gorm.io/gorm"
	"gorm.io/plugin/soft_delete"
	"time"
)

// Approval 审批
type Approval struct {
	ID                uint64                `gorm:"primaryKey;column:id" json:"id"`
	DeletedAt         soft_delete.DeletedAt `gorm:"column:deleted_at" json:"deletedAt"`
	CreatedAt         time.Time             `gorm:"column:created_at" json:"createdAt"`
	UpdatedAt         time.Time             `gorm:"column:updated_at" json:"updatedAt"`
	SubmitterID       uint64                `gorm:"column:submitter_id" json:"submitterId"`
	Status            int8                  `gorm:"column:status" json:"status"`
	SubmitterName     string                `gorm:"column:submitter_name" json:"submitterName"`
	CopyUsers         CopyUsers             `gorm:"column:copy_users" json:"copyUsers"`
	ApprovalUsers     ApprovalUsers         `gorm:"column:approval_users" json:"approvalUsers"`
	Type              string                `gorm:"column:type" json:"type"`
	Level             uint8                 `gorm:"column:level" json:"level"`
	NowLevel          uint8                 `gorm:"column:now_level" json:"nowLevel"`
	NowUserId         uint64                `gorm:"column:now_user_id" json:"nowUserId"`
	NowUserName       string                `gorm:"column:now_user_name" json:"nowUserName"`
	Content           string                `gorm:"column:content" json:"content"`
	Reply             string                `gorm:"column:reply" json:"reply"`
	Domain            *string               `gorm:"column:domain" json:"domain"`
	Show              *Show                 `gorm:"foreignKey:ApprovalID" json:"Show"`
	Work              *Work                 `gorm:"foreignKey:ApprovalID" json:"Work"`
	Bundle            *Bundle               `gorm:"foreignKey:ApprovalID" json:"Bundle"`
	Exhibition        *Exhibition           `gorm:"foreignKey:ApprovalID" json:"Exhibition"`
	ApprovalWorkFlows []*ApprovalWorkFlow   `gorm:"foreignKey:ApprovalID" json:"ApprovalWorkFlows"`
}

const (
	TypeContent    = "content"
	TypeWork       = "work"
	TypeExhibition = "exhibition"
	TypeShow       = "show"
	TypeBundle     = "bundle"
)
const (
	StatusDoing = 1
	StatusOk    = 2
	StatusFail  = 3
)

const (
	StatusNeedViewed = 4
	StatusViewed     = 5
)

type ApprovalContentInterface interface {
	SaveApprovalContent(in *approval.CreateRequest, a *Approval) error
	UpdateApprovalContent(in *approval.CreateRequest, a *Approval) error
	BuildResContent(a *Approval, request *approval.CreateRequest)
	DeleteApproval(p *Approval) error
}

// TableName get sql table name.获取数据库表名
func (m *Approval) TableName() string {
	return "approval"
}

func preValidateExhibition(in *approval.CreateRequest) error {
	var entity *Bundle

	if in.Type != TypeExhibition {
		return nil
	}

	if in.Exhibition == nil || in.Exhibition.PidApprovalID == 0 {
		return errors.New(msg.ErrorApprovalType)
	}

	if err := DB.Where(Bundle{ApprovalID: in.Exhibition.PidApprovalID}).First(&entity).Error; err != nil {
		return err
	}

	if len(in.Exhibition.ApprovalExhibitions) != int(entity.ApplicationsNum) {
		return errors.New(msg.ErrorWrongNum)
	}

	return nil

}

func StoreApproval(in *approval.CreateRequest) (*Approval, error) {
	var entity *Approval

	if err1 := preValidateExhibition(in); err1 != nil {
		return entity, err1
	}

	err := DB.Transaction(func(tx *gorm.DB) error {

		setting, terr := GetApprovalSettingFromKeyWord(in.Domain, in.Type)
		if terr != nil {
			return errors.New("抄送人没有配置")
		}

		// 保存基本信息
		entity = &Approval{
			Domain:        &in.Domain,
			SubmitterID:   in.SubmitterID,
			SubmitterName: in.SubmitterName,
			CopyUsers:     setting.CopyUsers,
			ApprovalUsers: setting.ApprovalUsers,
			Type:          in.Type,
			Content:       in.Content,
			Status:        StatusDoing,
			Level:         uint8(len(setting.ApprovalUsers)),
			NowLevel:      1,
			NowUserId:     setting.ApprovalUsers[0].ID,
			NowUserName:   setting.ApprovalUsers[0].Name,
		}

		if err := DB.Create(&entity).Error; err != nil {
			return err
		}

		// 不同类型保存不同的结构体
		err := entity.SaveContent(in)

		if err != nil {
			return err
		}

		return BatchSave(setting.ApprovalUsers, entity.ID)
	})

	return entity, err

}

func Viewed(in *approval.ViewedRequest) error {

	var entity *Approval
	var err error
	var isView = false

	if err = DB.First(&entity, in.ID).Error; err != nil {
		return errors.New(msg.ErrorNotFound)
	}

	if entity.Status != StatusOk {
		return errors.New(msg.ErrorDoingNotView)
	}

	copyUsers := entity.CopyUsers

	for i, temp := range copyUsers {
		if temp.ID == in.UserID {
			if temp.IsViewed == true {
				return errors.New(msg.ErrorAlreadySettingView)
			}

			isView = true
			temp.IsViewed = isView
			copyUsers[i] = temp
		}
	}

	if isView == false {
		return errors.New(msg.ErrorSettingView)
	}

	return DB.Model(&Approval{}).Where(&Approval{ID: in.ID}).Updates(&Approval{CopyUsers: copyUsers}).Error

}

func UpdateApproval(in *approval.CreateRequest) (*Approval, error) {
	var entity *Approval

	if err1 := preValidateExhibition(in); err1 != nil {
		return entity, err1
	}

	err := DB.Transaction(func(tx *gorm.DB) error {

		if departErr := DB.First(&entity, in.ID).Error; departErr != nil {
			return errors.New(msg.ErrorNotFound)
		}

		if entity.Type != in.Type {
			return errors.New(msg.ErrorChangeType)
		}

		// 保存基本信息
		upEntity := &Approval{
			Content: in.Content,
		}

		if err := DB.Where(&Approval{ID: in.ID}).Updates(&upEntity).Error; err != nil {
			return err
		}

		// 不同类型保存不同的结构体
		err := entity.UpdateContent(in)

		return err
	})

	return entity, err

}

func approvalCalc(filter *Approval) *approval.Information {

	var num int64

	info := &approval.Information{
		Total:        0,
		DoingTotal:   0,
		SuccessTotal: 0,
		FailTotal:    0,
	}

	DB.Model(&Approval{}).Where(&filter).Count(&num)
	info.Total = uint64(num)

	DB.Model(&Approval{}).Where(&filter).Where(&Approval{Status: StatusDoing}).Count(&num)
	info.DoingTotal = uint64(num)

	DB.Model(&Approval{}).Where(&filter).Where(&Approval{Status: StatusOk}).Count(&num)
	info.SuccessTotal = uint64(num)

	DB.Model(&Approval{}).Where(&filter).Where(&Approval{Status: StatusFail}).Count(&num)
	info.FailTotal = uint64(num)

	return info
}

func approvalCalcJson(domain string, userId uint64) *approval.Information {

	var num int64
	var jsonStr = "JSON_CONTAINS(approval_users,JSON_OBJECT('ID', ?))"

	info := &approval.Information{
		Total:        0,
		DoingTotal:   0,
		SuccessTotal: 0,
		FailTotal:    0,
	}

	DB.Model(&Approval{}).Where(jsonStr, userId).Count(&num)
	info.Total = uint64(num)

	DB.Model(&Approval{}).Where(jsonStr, userId).Where(&Approval{Status: StatusDoing, Domain: &domain}).Count(&num)
	info.DoingTotal = uint64(num)

	DB.Model(&Approval{}).Where(jsonStr, userId).Where(&Approval{Status: StatusOk, Domain: &domain}).Count(&num)
	info.SuccessTotal = uint64(num)

	DB.Model(&Approval{}).Where(jsonStr, userId).Where(&Approval{Status: StatusFail, Domain: &domain}).Count(&num)
	info.FailTotal = uint64(num)

	return info
}

// ApprovalInfo 统计
func ApprovalInfo(in *approval.InformationRequest) (*approval.InformationResponse, error) {

	response := &approval.InformationResponse{
		MySubmitInfo: approvalCalc(&Approval{Domain: &in.Domain, SubmitterID: in.UserID}),
		SubmitMeInfo: approvalCalcJson(in.Domain, in.UserID),
		DomainInfo:   approvalCalc(&Approval{Domain: &in.Domain}),
	}

	return response, nil

}

func (m *Approval) SaveApprovalContent(in *approval.CreateRequest, a *Approval) error {
	return nil
}

func (m *Approval) UpdateApprovalContent(in *approval.CreateRequest, a *Approval) error {
	return nil
}

func (m *Approval) DeleteApproval(p *Approval) error {
	return nil
}

func (m *Approval) DeleteContent() error {

	factory, err := getApprovalContentFactory(m.Type)

	if err != nil {
		return err
	}

	return factory.DeleteApproval(m)
}

func (m *Approval) BuildResContent(a *Approval, request *approval.CreateRequest) {

}

func (m *Approval) SetResContent(request *approval.CreateRequest) error {

	factory, err := getApprovalContentFactory(m.Type)

	if err != nil {
		return err
	}

	factory.BuildResContent(m, request)

	return nil
}

func (m *Approval) SaveContent(in *approval.CreateRequest) error {

	factory, err := getApprovalContentFactory(in.Type)
	if err != nil {
		return err
	}

	err = factory.SaveApprovalContent(in, m)

	return err
}

func (m *Approval) UpdateContent(in *approval.CreateRequest) error {

	factory, err := getApprovalContentFactory(in.Type)
	if err != nil {
		return err
	}

	err = factory.UpdateApprovalContent(in, m)

	return err
}

func MyWorkApprovals(in *approval.ListRequest) ([]*Approval, int64) {
	var list []*Approval
	var count int64

	//list
	modelObj := DB.Model(&Approval{}).
		Preload("Show").
		Preload("Work.ApprovalWorks").
		Preload("Bundle").
		Preload("ApprovalWorkFlows").
		Preload("Exhibition.ApprovalExhibitions")

	if in.Type != "" {
		modelObj = modelObj.Where(&Approval{Type: in.Type})
	}

	/**
	* 审批展示(抄送在此不表)
			/       \
	      进行中    通过或者拒绝
	       /		  \
	  	当前是我审批	我参与审批的
	*/
	if in.UserID != 0 {
		modelObj = modelObj.Where(
			DB.Where("JSON_CONTAINS(approval_users,JSON_OBJECT('ID', ?))", in.UserID).
				Where("status != ?", StatusDoing).                                                                       //完成，我参与审批
				Or(DB.Where("now_user_id", in.UserID).Where("status = ?", StatusDoing)).                                 //进行中，当前审批人是我,
				Or(DB.Where("JSON_CONTAINS(copy_users,JSON_OBJECT('ID', ?))", in.UserID).Where("status = ?", StatusOk))) //抄送人(完成抄送)
	}

	if in.Status != 0 {
		modelObj = modelObj.Where(&Approval{Status: int8(in.Status)})
	}

	modelObj.Count(&count)

	modelObj.Limit(int(in.PageSize)).Offset(page.GetOffset(in.Page, in.PageSize)).Order("id desc").Find(&list)

	return list, count
}

func MySubmitApprovals(in *approval.ListRequest) ([]*Approval, int64) {
	var list []*Approval
	var count int64

	//list
	modelObj := DB.Model(&Approval{}).
		Preload("Show").
		Preload("Work.ApprovalWorks").
		Preload("Bundle").
		Preload("ApprovalWorkFlows").
		Preload("Exhibition.ApprovalExhibitions")

	if in.Status != 0 {
		modelObj = modelObj.Where(&Approval{Status: int8(in.Status)})
	}

	if in.Type != "" {
		modelObj = modelObj.Where(&Approval{Type: in.Type})
	}

	modelObj = modelObj.Where(&Approval{SubmitterID: in.UserID})

	modelObj.Count(&count)

	modelObj.Limit(int(in.PageSize)).Offset(page.GetOffset(in.Page, in.PageSize)).Order("id desc").Find(&list)

	return list, count
}

func (m *Approval) Pass(reply string, workFlowId uint64) error {
	return m.operateStatus(StatusOk, reply, workFlowId)
}

func (m *Approval) Refuse(reply string, workFlowId uint64) error {
	return m.operateStatus(StatusFail, reply, workFlowId)
}

func (m *Approval) operateStatus(status uint8, reply string, workFlowId uint64) error {

	var workFlow ApprovalWorkFlow

	m.Reply = reply
	if err := DB.Model(&ApprovalWorkFlow{ApprovalID: m.ID, Status: StatusDoing}).First(&workFlow, workFlowId).Error; err != nil {
		return err
	}

	if m.NowLevel != workFlow.Level {
		return errors.New(msg.ErrorOperate)
	}

	// 拒绝通过
	if status == StatusFail {
		m.Status = StatusFail

		if err := DB.Save(m).Error; err != nil {
			return err
		}

		return workFlow.Refuse(reply)
	}

	/*--------层级审批通过---------*/
	// 整个审批通过
	if m.Level == m.NowLevel {
		m.Status = StatusOk

		//审批层级通过
	} else {
		m.NowLevel = workFlow.Level + 1
		nextFlow, err := GetWorkFlowByLevel(m.ID, m.NowLevel)
		if err != nil {
			return err
		}
		m.NowUserId = nextFlow.UserId
		m.NowUserName = nextFlow.Name
	}

	if err := DB.Save(m).Error; err != nil {
		return err
	}

	return workFlow.Pass(reply)
}

func getApprovalContentFactory(typeFiled string) (ApprovalContentInterface, error) {
	switch typeFiled {
	case TypeContent:
		return &Approval{}, nil
	case TypeShow:
		return &Show{}, nil
	case TypeWork:
		return &Work{}, nil
	case TypeBundle:
		return &Bundle{}, nil
	case TypeExhibition:
		return &Exhibition{}, nil
	default:
		return &Approval{}, nil
	}
}