package app

import (
	consts "cid/consts/app"
	dao "cid/dao/app"
	dto "cid/model/dto/app"
	entity "cid/model/entity/app"
	"context"
	"errors"

	"github.com/gogf/gf/v2/util/gconv"
)

type applicationService struct{}

// Application 应用服务
var Application = new(applicationService)

// Create 创建应用
func (s *applicationService) Create(ctx context.Context, req *dto.CreateApplicationReq) (res *dto.CreateApplicationRes, err error) {
	// 检查应用名称是否重复
	count, err := dao.Application.Count(ctx, &dto.ListApplicationReq{Name: req.Name})
	if err != nil {
		return
	}
	if count > 0 {
		return nil, errors.New("应用名称已存在")
	}

	// 检查应用编码是否重复
	count, err = dao.Application.Count(ctx, &dto.ListApplicationReq{AppCode: req.AppCode})
	if err != nil {
		return
	}
	if count > 0 {
		return nil, errors.New("应用编码已存在")
	}

	// 插入数据库
	id, err := dao.Application.Insert(ctx, req)
	if err != nil {
		return
	}
	res = &dto.CreateApplicationRes{
		Id: id,
	}
	return
}

// List 获取应用列表
func (s *applicationService) List(ctx context.Context, req *dto.ListApplicationReq) (res *dto.ListApplicationRes, err error) {
	applicationList, total, err := dao.Application.List(ctx, req)
	if err != nil {
		return
	}

	// 组装响应数据
	list := make([]dto.ApplicationItem, 0, len(applicationList))
	for _, item := range applicationList {
		list = append(list, dto.ApplicationItem{
			Id:          item.Id,
			Name:        item.Name,
			AppCode:     item.AppCode,
			Type:        item.Type,
			TypeName:    s.getTypeName(item.Type),
			Status:      item.Status,
			StatusName:  s.getStatusName(item.Status),
			Description: item.Description,
			CreatedAt:   item.CreatedAt.Unix(),
			UpdatedAt:   item.UpdatedAt.Unix(),
		})
	}

	res = &dto.ListApplicationRes{
		List:  list,
		Total: total,
	}
	return
}

// GetOne 获取单个应用
func (s *applicationService) GetOne(ctx context.Context, req *dto.GetApplicationReq) (res *dto.GetApplicationRes, err error) {
	application, err := dao.Application.GetOne(ctx, req)
	if err != nil {
		return
	}

	var applicationEntity *entity.Application
	if err = gconv.Struct(application, &applicationEntity); err != nil {
		return
	}

	return &dto.GetApplicationRes{
		Application: applicationEntity,
	}, nil
}

// Update 更新应用
func (s *applicationService) Update(ctx context.Context, req *dto.UpdateApplicationReq) (err error) {
	// 检查应用是否存在
	exist, err := dao.Application.GetOne(ctx, &dto.GetApplicationReq{Id: req.Id})
	if err != nil || exist == nil {
		return errors.New("应用不存在")
	}

	// 如果修改了名称,检查新名称是否重复
	if req.Name != "" && req.Name != exist.Name {
		count, err := dao.Application.Count(ctx, &dto.ListApplicationReq{Name: req.Name})
		if err != nil {
			return err
		}
		if count > 0 {
			return errors.New("应用名称已存在")
		}
	}

	// 如果修改了应用编码,检查新编码是否重复
	if req.AppCode != "" && req.AppCode != exist.AppCode {
		count, err := dao.Application.Count(ctx, &dto.ListApplicationReq{AppCode: req.AppCode})
		if err != nil {
			return err
		}
		if count > 0 {
			return errors.New("应用编码已存在")
		}
	}

	_, err = dao.Application.Update(ctx, req)
	return
}

// UpdateStatus 更新应用状态
func (s *applicationService) UpdateStatus(ctx context.Context, req *dto.UpdateApplicationStatusReq) (err error) {
	_, err = dao.Application.UpdateStatus(ctx, req.Id, req.Status.String())
	return
}

// Delete 删除应用
func (s *applicationService) Delete(ctx context.Context, req *dto.DeleteApplicationReq) (err error) {
	// TODO: 检查是否存在关联的数据,防止误删
	// 例如: 检查该应用是否有关联的广告活动等

	_, err = dao.Application.Delete(ctx, req)
	return
}

// GetByAppCode 根据应用编码获取应用
func (s *applicationService) GetByAppCode(ctx context.Context, appCode string) (res *entity.Application, err error) {
	return dao.Application.GetByAppCode(ctx, appCode)
}

// getTypeName 获取类型名称
func (s *applicationService) getTypeName(appType consts.AppType) string {
	typeNames := map[consts.AppType]string{
		consts.AppTypeWeb:        "Web应用",
		consts.AppTypeMobile:     "移动应用",
		consts.AppTypeMiniApp:    "小程序",
		consts.AppTypeH5:         "H5应用",
		consts.AppTypeDesktop:    "桌面应用",
		consts.AppTypeThirdParty: "第三方应用",
	}
	if name, ok := typeNames[appType]; ok {
		return name
	}
	return string(appType)
}

// getStatusName 获取状态名称
func (s *applicationService) getStatusName(status consts.AppStatus) string {
	statusNames := map[consts.AppStatus]string{
		consts.AppStatusActive:   "启用",
		consts.AppStatusInactive: "停用",
	}
	if name, ok := statusNames[status]; ok {
		return name
	}
	return string(status)
}