package user

import (
	"SciencesServer/app/api/enterprise/model"
	"SciencesServer/app/basic/controller"
	model2 "SciencesServer/app/common/model"
	"SciencesServer/app/session"
	"SciencesServer/serve/orm"
	"errors"
	"gorm.io/gorm"
	"strings"
	"time"
)

type Bill struct {
	*session.Enterprise
}

type BillHandle func(session *session.Enterprise) *Bill

type (
	// BillTicketInfo 账单发票信息
	BillTicketInfo struct {
		ID string `json:"id"`
		*model2.UserBillTicket
	}
	// BillTicketParams 账单发票参数信息
	BillTicketParams struct {
		Kind                                        int
		Name, DutyParagraph, Mobile, Email, Address string
	}
)

// Instance 账单信息
func (c *Bill) Instance(orderNo, createdAt string, page, pageSize int) (*controller.ReturnPages, error) {
	mUserBill := model.NewUserBill()

	where := []*model2.ModelWhere{
		model2.NewWhere("b.uid", c.UID),
	}
	if orderNo != "" {
		where = append(where, model2.NewWhere("b.order_no", orderNo))
	}
	if createdAt != "" {
		where = append(where, model2.NewWhereSectionAt("b.created_at", strings.Split(createdAt, " ~ "))...)
	}
	var count int64

	out, err := mUserBill.Bill(page, pageSize, &count, where...)

	if err != nil {
		return nil, err
	}
	return &controller.ReturnPages{Data: out, Count: count}, nil
}

// Ticket 发票信息
func (c *Bill) Ticket(id uint64) (*BillTicketInfo, error) {
	mUserBillTicket := model.NewUserBillTicket()

	isExist, err := model2.FirstWhere(mUserBillTicket.UserBillTicket, model2.NewWhere("user_bill_id", id))

	if err != nil {
		return nil, err
	} else if !isExist {
		return nil, nil
	}
	return &BillTicketInfo{
		ID:             mUserBillTicket.GetEncodeID(),
		UserBillTicket: mUserBillTicket.UserBillTicket,
	}, nil
}

// TicketIssue 发票开具
func (c *Bill) TicketIssue(id uint64, params *BillTicketParams) error {
	mUserBill := model.NewUserBill()
	mUserBill.ID = id

	isExist, err := model2.FirstField(mUserBill.UserBill, []string{"id", "bill_id", "user_id"})

	if err != nil {
		return err
	} else if !isExist {
		return errors.New("操作错误，账单信息不存在或已被删除")
	} else if mUserBill.UID != c.UID {
		return errors.New("操作错误，不可开具他人账单发票信息")
	}
	// 用户账单信息
	mUserBillTicket := model.NewUserBillTicket()

	var count int64

	if err = model2.Count(mUserBillTicket.UserBillTicket, &count, model2.NewWhere("user_bill_id", mUserBill.ID)); err != nil {
		return err
	} else if count > 0 {
		return errors.New("操作错误，当前账单已开具发票")
	}
	return orm.GetDB().Transaction(func(tx *gorm.DB) error {
		mUserBillTicket.UserBillID = mUserBill.ID
		mUserBillTicket.Kind = model2.UserBillTicketKind(params.Kind)
		mUserBillTicket.Name = params.Name
		mUserBillTicket.DutyParagraph = params.DutyParagraph
		mUserBillTicket.Mobile = params.Mobile
		mUserBillTicket.Email = params.Email
		mUserBillTicket.Address = params.Address

		if err = model2.Create(mUserBillTicket.UserBillTicket, tx); err != nil {
			return err
		}

		mBillInstance := model.NewBillInstance()
		mBillInstance.ID = mUserBill.BillID

		return model2.Updates(mBillInstance.BillInstance, map[string]interface{}{
			"status": model2.BillInstanceStatusForApply, "updated_at": time.Now(),
		}, tx)
	})
}

func NewBill() BillHandle {
	return func(session *session.Enterprise) *Bill {
		return &Bill{session}
	}
}