package logic

import (
	"context"

	"easygoadmin/api/v1"
	"easygoadmin/internal/dao"
	"easygoadmin/internal/service"
)

// ============================== 友情链接业务实现 ==============================

// sLink 友情链接业务实现
// 实现 service.ILink 接口，接口定义见 api/v1/link.go
type sLink struct{}

func init() {
	service.RegisterLink(&sLink{})
}

// linkSerializeMaps 枚举字段到字典编码的映射
// {field}Text 由基座自动填充
var linkSerializeMaps = map[string]string{
	"type":   "link_type",
	"form":   "link_form",
	"status": "link_status",
}

// linkSpec 友链模块声明
var linkSpec = ModuleSpec[v1.LinkItem, v1.LinkItem, v1.LinkDetailRes]{
	Model:         dao.Link.Ctx,
	LikeFields:    []string{"name"},
	EqFields:      []string{"type", "status"},
	OrderBy:       "sort, id",
	SerializeMaps: linkSerializeMaps,
	FileFields:    []string{"image"},
	FileSaveDir:   "link",
	ToData:        linkToData,
}

// linkToData 全量表单语义转换
// 兼容新增与修改请求，将入参转换为落库字段
func linkToData(req any) map[string]any {
	switch r := req.(type) {
	case *v1.LinkAddReq:
		return map[string]any{"name": r.Name, "type": r.Type, "url": r.Url, "form": r.Form,
			"image": r.Image, "status": r.Status, "sort": r.Sort, "note": r.Note}
	case *v1.LinkUpdateReq:
		return map[string]any{"name": r.Name, "type": r.Type, "url": r.Url, "form": r.Form,
			"image": r.Image, "status": r.Status, "sort": r.Sort, "note": r.Note}
	}
	panic("linkToData: 不支持的入参类型")
}

// Page 友链分页
// 按查询条件分页返回友链列表
func (s *sLink) Page(ctx context.Context, req *v1.LinkPageReq) (res *v1.LinkPageRes, err error) {
	list, total, err := linkSpec.Page(ctx, req, req.GetPageNo(), req.GetPageSize())
	if err != nil {
		return nil, err
	}
	return v1.NewPageData(req.GetPageNo(), req.GetPageSize(), total, derefSlice(list)), nil
}

// Detail 友链详情
// 按友链ID查询详情
func (s *sLink) Detail(ctx context.Context, req *v1.LinkDetailReq) (res *v1.LinkDetailRes, err error) {
	return linkSpec.Detail(ctx, req.Id, req)
}

// Add 新增友链
// 新增成功后返回新记录ID
func (s *sLink) Add(ctx context.Context, req *v1.LinkAddReq) (res *v1.IdRes, err error) {
	id, err := linkSpec.Add(ctx, req)
	if err != nil {
		return nil, err
	}
	return &v1.IdRes{Id: id}, nil
}

// Update 修改友链
// 按友链ID更新记录
func (s *sLink) Update(ctx context.Context, req *v1.LinkUpdateReq) (res *v1.LinkUpdateRes, err error) {
	if err = linkSpec.Update(ctx, req.Id, req); err != nil {
		return nil, err
	}
	return &v1.LinkUpdateRes{}, nil
}

// Delete 删除友链
// 按友链ID删除单条记录
func (s *sLink) Delete(ctx context.Context, req *v1.LinkDeleteReq) (res *v1.LinkDeleteRes, err error) {
	if err = linkSpec.Delete(ctx, req.Id); err != nil {
		return nil, err
	}
	return &v1.LinkDeleteRes{}, nil
}

// BatchDelete 批量删除友链
// 按友链ID列表批量删除记录
func (s *sLink) BatchDelete(ctx context.Context, req *v1.LinkBatchDeleteReq) (res *v1.LinkBatchDeleteRes, err error) {
	if err = linkSpec.BatchDelete(ctx, req.Ids); err != nil {
		return nil, err
	}
	return &v1.LinkBatchDeleteRes{}, nil
}