package article

import (
	"net/http"

	"git.xdrm.io/go/aicra"
	"git.xdrm.io/go/aicra/api"
	"git.xdrm.io/go/tiny-url-ex/service/model"
	"github.com/jinzhu/gorm"
)

// Service to manage users
type Service struct {
	DB *gorm.DB
}

// Wire services to their paths
func (s Service) Wire(server *aicra.Server) {
	if !s.DB.HasTable(&model.Article{}) {
		s.DB.CreateTable(&model.Article{})
	}

	server.Handle(http.MethodGet, "/articles", s.getAllArticles)
	server.Handle(http.MethodGet, "/user/{id}/articles", s.getArticlesByAuthor)
	server.Handle(http.MethodGet, "/article/{id}", s.getArticleByID)
	server.Handle(http.MethodPost, "/article", s.postArticle)
	server.Handle(http.MethodDelete, "/article/{id}", s.deleteArticle)
}

func (s Service) getArticlesByAuthor(req api.Request, res *api.Response) api.Error {
	id, err := req.Param.GetUint("author_id")
	if err != nil {
		return api.ErrorInvalidParam
	}
	articles := make([]model.Article, 0)
	s.DB.Where("author = ?", id).Find(&articles)
	res.SetData("articles", articles)
	return api.ErrorSuccess
}

func (s Service) getAllArticles(req api.Request, res *api.Response) api.Error {
	articles := make([]model.Article, 0)
	s.DB.Find(&articles)
	res.SetData("articles", articles)
	return api.ErrorSuccess
}

func (s Service) getArticleByID(req api.Request, res *api.Response) api.Error {
	id, err := req.Param.GetUint("article_id")
	if err != nil {
		return api.ErrorInvalidParam
	}

	var article model.Article
	if s.DB.First(&article, id).RecordNotFound() {
		return api.ErrorNoMatchFound
	}

	res.SetData("id", article.ID)
	res.SetData("title", article.Title)
	res.SetData("body", article.Body)
	res.SetData("author", article.Author)
	return api.ErrorSuccess
}

func (s Service) postArticle(req api.Request, res *api.Response) api.Error {
	return api.ErrorNotImplemented
}

func (s Service) deleteArticle(req api.Request, res *api.Response) api.Error {
	id, err := req.Param.GetUint("user_id")
	if err != nil {
		return api.ErrorInvalidParam
	}

	article := model.Article{}
	article.ID = id
	s.DB.Delete(&article)

	return api.ErrorSuccess
}