package sys

import (
	"SciencesServer/app/api/website/model"
	model2 "SciencesServer/app/common/model"
)

type About struct {
	tenantID uint64
}

type AboutHandle func(tenantID uint64) *About

type (
	// AboutInfo 基本信息
	AboutInfo struct {
		ID       string       `json:"id"`
		Title    string       `json:"title"`
		Content  string       `json:"content"`
		Children []*AboutInfo `json:"children"`
	}
	// AboutNavigationInfo 导航栏信息
	AboutNavigationInfo struct {
		ID    string `json:"id"`
		Title string `json:"title"`
	}
)

func (c *About) tree(src []*model2.SysAbout, parentID uint64) []*AboutInfo {
	out := make([]*AboutInfo, 0)

	for _, v := range src {
		if v.ParentID == parentID {
			out = append(out, &AboutInfo{
				ID:       v.GetEncodeID(),
				Title:    v.Title,
				Content:  v.Content,
				Children: nil,
			})
		}
	}
	return out
}

// Instance 关于信息
func (c *About) Instance() ([]*AboutInfo, error) {
	mSysAbout := model.NewSysAbout()

	out := make([]*model2.SysAbout, 0)

	if err := model2.ScanFields(mSysAbout.SysAbout, &out, []string{"id", "title", "content"}); err != nil {
		return nil, err
	}
	return c.tree(out, 0), nil
}

// Navigation 导航栏
func (c *About) Navigation() ([]*AboutNavigationInfo, error) {
	mSysAbout := model.NewSysAbout()
	out := make([]*model2.SysAbout, 0)

	if err := model2.ScanFields(mSysAbout.SysAbout, &out, []string{"id", "title"}, &model2.ModelWhereOrder{
		Where: model2.NewWhere("parent_id", 0),
		Order: model2.NewOrder("sort", model2.OrderModeToDesc),
	}, &model2.ModelWhereOrder{
		Where: model2.NewWhere("tenant_id", c.tenantID),
		Order: model2.NewOrder("id", model2.OrderModeToDesc),
	}); err != nil {
		return nil, err
	}
	list := make([]*AboutNavigationInfo, 0)

	for _, v := range out {
		list = append(list, &AboutNavigationInfo{
			ID: v.GetEncodeID(), Title: v.Title,
		})
	}
	return list, nil
}

func NewAbout() AboutHandle {
	return func(tenantID uint64) *About {
		return &About{tenantID: tenantID}
	}
}