package service

import (
	"SciencesServer/app/api/admin/model"
	"SciencesServer/app/basic/controller"
	model2 "SciencesServer/app/common/model"
	"SciencesServer/app/session"
	"errors"
)

type Demand struct {
	*session.Admin
}

type DemandHandle func(session *session.Admin) *Demand

type (
	// DemandInfo 需求信息
	DemandInfo struct {
		ID string `json:"id"`
		*model.ServiceDemandInfo
		Area string `json:"area"`
	}
)

// Instance 首页信息
func (c *Demand) Instance(tenantID uint64, title string, kind, page, pageSize int) (*controller.ReturnPages, error) {
	mServiceDemand := model.NewServiceDemand()

	where := make([]*model2.ModelWhere, 0)

	if c.TenantID > 0 {
		where = append(where, model2.NewWhere("d.tenant_id", c.TenantID))
	}
	if tenantID > 0 {
		where = append(where, model2.NewWhere("d.tenant_id", tenantID))
	}
	if title != "" {
		where = append(where, model2.NewWhereLike("d.title", title))
	}
	if kind > 0 {
		where = append(where, model2.NewWhere("d.kind", kind))
	}
	var count int64

	out, err := mServiceDemand.Demand(page, pageSize, &count, where...)

	if err != nil {
		return nil, err
	}
	list := make([]*DemandInfo, 0)

	for _, v := range out {
		list = append(list, &DemandInfo{
			ID:                v.GetEncodeID(),
			ServiceDemandInfo: v,
			Area:              v.FormatBasic(),
		})
	}
	return &controller.ReturnPages{Data: list, Count: count}, nil
}

// Delete 删除操作
func (c *Demand) Delete(id uint64) error {
	mServiceDemand := model.NewServiceDemand()
	mServiceDemand.ID = id

	isExist, err := model2.FirstField(mServiceDemand.ServiceDemand, []string{"id", "tenant_id"})

	if err != nil {
		return err
	} else if !isExist {
		return errors.New("操作错误，需求信息不存在或已被删除")
	} else if c.TenantID > 0 && mServiceDemand.TenantID != c.TenantID {
		return errors.New("操作错误，无权限操作")
	}
	return model2.Delete(mServiceDemand.ServiceDemand)
}

func NewDemand() DemandHandle {
	return func(session *session.Admin) *Demand {
		return &Demand{session}
	}
}