package bouquins

import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"

	"golang.org/x/oauth2"
)

// GithubProvider implements OAuth2 client with github.com
type GiteaProvider string

type giteaProfile struct {
	AvatarURL string `json:"avatar_url"`
	Created   string `json:"created"`
	Email     string `json:"email"`
	FullName  string `json:"full_name"`
	ID        int64  `json:"id"`
	IsAdmin   bool   `json:"is_admin"`
	Language  string `json:"language"`
	LastLogin string `json:"last_login"`
	Login     string `json:"login"`
}

func init() {
	Providers = append(Providers, GiteaProvider("gitea"))
}

// Name returns name of provider
func (p GiteaProvider) Name() string {
	return string(p)
}

// Label returns label of provider
func (p GiteaProvider) Label() string {
	return "Gitea"
}

// Icon returns icon CSS class for provider
func (p GiteaProvider) Icon() string {
	return "giteaicon" // TODO
}

// Config returns OAuth configuration for this provider
func (p GiteaProvider) Config(conf *Conf) *oauth2.Config {
	for _, c := range conf.ProvidersConf {
		if c.Name == p.Name() {
			return &oauth2.Config{
				ClientID:     c.ClientID,
				ClientSecret: c.ClientSecret,
				RedirectURL:  "http://localhost:9000/callback", // TODO
				Endpoint: oauth2.Endpoint{
					"https://git.meutel.net/login/oauth/authorize",    // TODO
					"https://git.meutel.net/login/oauth/access_token", // TODO
					oauth2.AuthStyleAutoDetect,
				},
			}
		}
	}
	return nil
}

// GetUser returns github primary email
func (p GiteaProvider) GetUser(token *oauth2.Token) (string, error) {
	apiReq, err := http.NewRequest("GET", "https://git.meutel.net/api/v1/user", nil) // TODO
	apiReq.Header.Add("Accept", "application/json")
	apiReq.Header.Add("Authorization", "token "+token.AccessToken)
	client := &http.Client{}
	response, err := client.Do(apiReq)
	defer response.Body.Close()
	if err != nil {
		log.Println("Auth error", err)
		return "", fmt.Errorf("Authentification error")
	}

	dec := json.NewDecoder(response.Body)
	var profile giteaProfile
	err = dec.Decode(&profile)
	if err != nil {
		log.Printf("Error reading %s API response %v", p.Name(), err)
		return "", fmt.Errorf("Error reading %s API response", p.Name())
	}
	userEmail := profile.Email
	log.Println("User email:", userEmail)
	return userEmail, nil
}