using JNPF.Extras.CollectiveOAuth.Cache;
using JNPF.Extras.CollectiveOAuth.Config;
using JNPF.Extras.CollectiveOAuth.Enums;
using JNPF.Extras.CollectiveOAuth.Models;
using JNPF.Extras.CollectiveOAuth.Utils;

namespace JNPF.Extras.CollectiveOAuth.Request;

public class GoogleAuthRequest : DefaultAuthRequest
{
    public GoogleAuthRequest(ClientConfig config) : base(config, new GoogleAuthSource())
    {
    }

    public GoogleAuthRequest(ClientConfig config, IAuthStateCache authStateCache)
        : base(config, new GoogleAuthSource(), authStateCache)
    {
    }
    protected override AuthToken getAccessToken(AuthCallback authCallback)
    {
        var response = doPostAuthorizationCode(authCallback.code);
        var accessTokenObject = response.parseObject();
        this.checkResponse(accessTokenObject);

        var authToken = new AuthToken();
        authToken.accessToken = accessTokenObject.getString("access_token");
        authToken.expireIn = accessTokenObject.getInt32("expires_in");
        authToken.idToken = accessTokenObject.getString("id_token");
        authToken.tokenType = accessTokenObject.getString("token_type");
        authToken.scope = accessTokenObject.getString("scope");

        return authToken;
    }

    protected override AuthUser getUserInfo(AuthToken authToken)
    {
        var reqParams = new Dictionary<string, object>
        {
            { "Authorization", "Bearer " + authToken.accessToken }
        };
        var response = HttpUtils.RequestPost(userInfoUrl(authToken), null, reqParams);
        var userInfo = response;
        var userObj = userInfo.parseObject();
        this.checkResponse(userObj);

        var authUser = new AuthUser();
        authUser.uuid = userObj.getString("sub");
        authUser.username = userObj.getString("email");
        authUser.nickname = userObj.getString("name");
        authUser.avatar = userObj.getString("picture");
        authUser.location = userObj.getString("locale");
        authUser.email = userObj.getString("email");
        authUser.gender = AuthUserGender.UNKNOWN;

        authUser.token = authToken;
        authUser.source = source.getName();
        authUser.originalUser = userObj;
        authUser.originalUserStr = response;
        return authUser;
    }

    /**
     * 返回带{@code state}参数的授权url，授权回调时会带上这个{@code state}
     *
     * @param state state 验证授权流程的参数，可以防止csrf
     * @return 返回授权地址
     * @since 1.9.3
     */
    public override string authorize(string state)
    {
        return UrlBuilder.fromBaseUrl(source.authorize())
            .queryParam("response_type", "code")
            .queryParam("client_id", config.clientId)
            .queryParam("scope", config.scope.IsNullOrWhiteSpace() ? "openid%20email%20profile" : config.scope)
            .queryParam("redirect_uri", config.redirectUri)
            .queryParam("state", getRealState(state))
            .build();
    }

    /**
     * 返回获取userInfo的url
     *
     * @param authToken 用户授权后的token
     * @return 返回获取userInfo的url
     */
    protected override string userInfoUrl(AuthToken authToken)
    {
        return UrlBuilder.fromBaseUrl(source.userInfo())
            .queryParam("access_token", authToken.accessToken)
            .build();
    }

    /**
   * 校验请求结果
   *
   * @param response 请求结果
   * @return 如果请求结果正常，则返回Exception
   */
    private void checkResponse(Dictionary<string, object> dic)
    {
        if (dic.ContainsKey("error") || dic.ContainsKey("error_description"))
        {
            throw new Exception($"{dic.getString("error")}: {dic.getString("error_description")}");
        }
    }
}