package sys

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

type Industry struct {
	*session.Admin
}

type IndustryHandle func(session *session.Admin) *Industry

type (
	// IndustryInfo 行业领域信息
	IndustryInfo struct {
		ID       string          `json:"id"`
		ParentID string          `json:"parent_id"`
		Name     string          `json:"name"`
		Children []*IndustryInfo `json:"children"`
	}
	// IndustryParams 行业领域参数信息
	IndustryParams struct {
		ID, PatentID uint64
		Name         string
	}
)

func (c *Industry) tree(src []*model2.SysIndustry, parentID uint64) []*IndustryInfo {
	out := make([]*IndustryInfo, 0)

	for _, v := range src {
		if v.ParentID == parentID {
			out = append(out, &IndustryInfo{
				ID:       v.GetEncodeID(),
				ParentID: (&model2.Model{ID: v.ParentID}).GetEncodeID(),
				Name:     v.Name,
				Children: c.tree(src, v.ID),
			})
		}
	}
	return out
}

// Instance 首页信息
func (c *Industry) Instance() ([]*IndustryInfo, error) {
	mSysIndustry := model.NewSysIndustry()
	out := make([]*model2.SysIndustry, 0)

	if err := model2.ScanFields(mSysIndustry.SysIndustry, &out, []string{"id", "parent_id", "name"}); err != nil {
		return nil, err
	}
	return c.tree(out, 0), nil
}

// Form 数据操作
func (c *Industry) Form(params *IndustryParams) error {
	mSysIndustry := model.NewSysIndustry()

	if params.ID > 0 {
		mSysIndustry.ID = params.ID

		if isExist, err := model2.First(mSysIndustry.SysIndustry); err != nil {
			return err
		} else if !isExist {
			return errors.New("操作错误，行业信息不存在或已被删除")
		}
	}
	mSysIndustry.ParentID = params.PatentID
	mSysIndustry.Name = params.Name

	if mSysIndustry.ID > 0 {
		return model2.Updates(mSysIndustry.SysIndustry, mSysIndustry.SysIndustry)
	}
	return model2.Create(mSysIndustry.SysIndustry)
}

// Delete 删除操作
func (c *Industry) Delete(id uint64) error {
	mSysIndustry := model.NewSysIndustry()
	mSysIndustry.ID = id

	isExist, err := model2.FirstField(mSysIndustry.SysIndustry, []string{"id"})

	if err != nil {
		return err
	} else if !isExist {
		return errors.New("操作错误，行业信息不存在或已被删除")
	}
	return model2.Delete(mSysIndustry.SysIndustry)
}

func NewIndustry() IndustryHandle {
	return func(session *session.Admin) *Industry {
		return &Industry{session}
	}
}