package sys

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

type Industry struct {
}

type IndustryHandle func() *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"`
	}
)

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:       fmt.Sprintf("%d", v.ID),
				ParentID: fmt.Sprintf("%d", v.ParentID),
				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
}

func NewIndustry() IndustryHandle {
	return func() *Industry {
		return &Industry{}
	}
}