package board

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"

	"github.com/gin-contrib/sessions"
	"github.com/gin-gonic/gin"
	"github.com/google/go-github/github"
	"golang.org/x/oauth2"
)

var (
	oauthConf = &oauth2.Config{
		ClientID:     os.Getenv("GITHUB_CLIENT_ID"),
		ClientSecret: os.Getenv("GITHUB_CLIENT_SECRET"),
		// Scopes:       []string{"read:user", "user:email"},
		Endpoint: oauth2.Endpoint{
			AuthURL:  "https://github.com/login/oauth/authorize",
			TokenURL: "https://github.com/login/oauth/access_token",
		}}
)

type SignIn struct {
	Username string `json:"username"`
	Password string `json:"password"`
}

type SSOSignIn struct {
	Code        string `json:"code"`
	State       string `json:"state"`
	RedirectURI string `json:"redirectUri"`
}

type SignUp struct {
	Username string `json:"username"`
	Password string `json:"password"`
}

func SSOHandler(c *gin.Context) {
	signin := SSOSignIn{}

	session := sessions.Default(c)
	savedState := session.Get("state")
	if savedState == nil || savedState.(string) != signin.State {
		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": "Invalid state parameter."})
		return
	}

	// 使用 code 换取 token
	token, err := oauthConf.Exchange(context.Background(), signin.Code)
	if err != nil {
		c.AbortWithStatusJSON(http.StatusBadRequest, gin.H{"error": fmt.Errorf("授权失败: %s", err.Error())})
		return
	}
	log.Println("token:", &token.AccessToken)

	// 使用 token 获取 GitHub 用户信息
	client := github.NewClient(oauthConf.Client(context.Background(), token))
	// client := github.NewClient(oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(token)))
	user, _, err := client.Users.Get(c.Request.Context(), "")
	if err != nil {
		c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"error": fmt.Errorf("获取用户信息失败: %s", err.Error())})
		return
	}

	// err = storeUserToDB(user)
	// if err != nil {
	// 	log.Println("Error storing user to DB:", err)
	// 	c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"message": "Internal server error"})
	// 	return
	// }

	log.Printf("%#v\n", user)
	log.Println(user.GetEmail(), user.GetName(), user.GetID(), user.GetAvatarURL())
	// 处理用户信息
	c.JSON(http.StatusOK, gin.H{
		"id":       user.ID,
		"login":    user.Login,
		"name":     user.Name,
		"email":    user.Email,
		"location": user.Location,
		"scopes":   token.Extra("scope"),
	})
	// jwtToken, err := generateJWTToken(*user.ID)
	// if err != nil {
	// 	log.Println("Error generating JWT token:", err)
	// 	c.AbortWithStatusJSON(http.StatusInternalServerError, gin.H{"message": "Internal server error"})
	// 	return
	// }

	// c.SetCookie("token", jwtToken, 60*60*24, "/", "localhost", false, true)
	// c.Redirect(http.StatusFound, "http://152.70.110.4:8000")
}