// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package user

import (
	"encoding/json"
	"errors"
	"fmt"
	"net/url"
	// "strings"
	// "time"

	"github.com/macaron-contrib/oauth2"

	// "github.com/gogits/gogs/models"
	"github.com/gogits/gogs/modules/log"
	"github.com/gogits/gogs/modules/middleware"
	"github.com/gogits/gogs/modules/setting"
	"github.com/gogits/gogs/modules/social"
)

func extractPath(next string) string {
	n, err := url.Parse(next)
	if err != nil {
		return setting.AppSubUrl + "/"
	}
	return n.Path
}

func SocialSignIn(ctx *middleware.Context) {
	if setting.OauthService == nil {
		ctx.Handle(404, "OAuth2 service not enabled", nil)
		return
	}

	info := ctx.Session.Get(oauth2.KEY_TOKEN)
	if info == nil {
		ctx.Redirect(setting.AppSubUrl + "/user/login")
		return
	}

	name := ctx.Params(":name")
	connect, ok := social.SocialMap[name]
	if !ok {
		ctx.Handle(404, "social login not enabled", errors.New(name))
		return
	}

	tk := new(oauth2.Token)
	if err := json.Unmarshal(info.([]byte), tk); err != nil {
		ctx.Handle(500, "Unmarshal token", err)
		return
	}

	ui, err := connect.UserInfo(tk, ctx.Req.URL)
	if err != nil {
		ctx.Handle(500, fmt.Sprintf("UserInfo(%s)", name), err)
		return
	}
	log.Info("social.SocialSignIn(social login): %s", ui)

	// oa, err := models.GetOauth2(ui.Identity)
	// switch err {
	// case nil:
	// 	ctx.Session.Set("uid", oa.User.Id)
	// 	ctx.Session.Set("uname", oa.User.Name)
	// case models.ErrOauth2RecordNotExist:
	// 	raw, _ := json.Marshal(tk)
	// 	oa = &models.Oauth2{
	// 		Uid:      -1,
	// 		Type:     connect.Type(),
	// 		Identity: ui.Identity,
	// 		Token:    string(raw),
	// 	}
	// 	log.Trace("social.SocialSignIn(oa): %v", oa)
	// 	if err = models.AddOauth2(oa); err != nil {
	// 		log.Error(4, "social.SocialSignIn(add oauth2): %v", err) // 501
	// 		return
	// 	}
	// case models.ErrOauth2NotAssociated:
	// 	next = setting.AppSubUrl + "/user/sign_up"
	// default:
	// 	ctx.Handle(500, "social.SocialSignIn(GetOauth2)", err)
	// 	return
	// }

	// oa.Updated = time.Now()
	// if err = models.UpdateOauth2(oa); err != nil {
	// 	log.Error(4, "UpdateOauth2: %v", err)
	// }

	// ctx.Session.Set("socialId", oa.Id)
	// ctx.Session.Set("socialName", ui.Name)
	// ctx.Session.Set("socialEmail", ui.Email)
	// log.Trace("social.SocialSignIn(social ID): %v", oa.Id)
	// ctx.Redirect(next)
}