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 LinkedInAuthRequest : DefaultAuthRequest
{
    public LinkedInAuthRequest(ClientConfig config) : base(config, new LinkedInAuthSource())
    {
    }

    public LinkedInAuthRequest(ClientConfig config, IAuthStateCache authStateCache)
        : base(config, new LinkedInAuthSource(), authStateCache)
    {
    }

    protected override AuthToken getAccessToken(AuthCallback authCallback)
    {
        return this.getToken(accessTokenUrl(authCallback.code));
    }

    protected override AuthUser getUserInfo(AuthToken authToken)
    {
        var accessToken = authToken.accessToken;
        var reqParams = new Dictionary<string, object>
        {
            { "Host", "api.linkedin.com" },
            { "Connection", "Keep-Alive" },
            { "Authorization", "Bearer " + accessToken }
        };
        var response = HttpUtils.RequestGet(userInfoUrl(authToken), reqParams);

        var userObj = response.parseObject();

        this.checkResponse(userObj);

        string userName = getUserName(userObj);

        // 获取用户头像
        string avatar = this.getAvatar(userObj);

        // 获取用户邮箱地址
        string email = this.getUserEmail(accessToken);

        var authUser = new AuthUser
        {
            uuid = userObj.getString("id"),
            username = userName,
            nickname = userName,
            avatar = avatar,
            email = email,
            gender = AuthUserGender.UNKNOWN,
            token = authToken,
            source = source.getName(),
            originalUser = userObj,
            originalUserStr = response
        };
        return authUser;
    }

    /**
     * 获取用户的真实名
     *
     * @param userInfoObject 用户json对象
     * @return 用户名
     */
    private string getUserName(Dictionary<string, object> userInfoObject)
    {
        string firstName, lastName;
        // 获取firstName
        if (userInfoObject.ContainsKey("localizedFirstName"))
        {
            firstName = userInfoObject.getString("localizedFirstName");
        }
        else
        {
            firstName = getUserName(userInfoObject, "firstName");
        }
        // 获取lastName
        if (userInfoObject.ContainsKey("localizedLastName"))
        {
            lastName = userInfoObject.getString("localizedLastName");
        }
        else
        {
            lastName = getUserName(userInfoObject, "lastName");
        }
        return firstName + " " + lastName;
    }

    /**
     * 获取用户的头像
     *
     * @param userInfoObject 用户json对象
     * @return 用户的头像地址
     */
    private string getAvatar(Dictionary<string, object> userInfoObject)
    {
        string avatar = null;
        var profilePictureObject = userInfoObject.getJSONObject("profilePicture");
        if (profilePictureObject.ContainsKey("displayImage~"))
        {
            var displayImageElements = profilePictureObject.getJSONObject("displayImage~")
                .getJSONArray("elements");
            if (null != displayImageElements && displayImageElements.Count > 0)
            {
                var largestImageObj = displayImageElements[displayImageElements.Count - 1];
                avatar = largestImageObj.getJSONArray("identifiers")[0].getString("identifier");
            }
        }
        return avatar;
    }

    /**
     * 获取用户的email
     *
     * @param accessToken 用户授权后返回的token
     * @return 用户的邮箱地址
     */
    private string getUserEmail(string accessToken)
    {
        string email = null;
        var reqParams = new Dictionary<string, object>();
        reqParams.Add("Host", "api.linkedin.com");
        reqParams.Add("Connection", "Keep-Alive");
        reqParams.Add("Authorization", "Bearer " + accessToken);
        var emailResponse = HttpUtils.RequestGet("https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))", reqParams);

        var emailObj = emailResponse.parseObject();
        this.checkResponse(emailObj);
        var listObject = emailObj.getJSONArray("elements");
        if (listObject != null && listObject.Count > 0)
        {
            email = listObject[listObject.Count - 1].getJSONObject("handle~").getString("emailAddress");
        }

        return email;
    }

    private string getUserName(Dictionary<string, object> userInfoObject, string nameKey)
    {
        string firstName;
        var firstNameObj = userInfoObject.getJSONObject(nameKey);
        var localizedObj = firstNameObj.getJSONObject("localized");
        var preferredLocaleObj = firstNameObj.getJSONObject("preferredLocale");
        firstName = localizedObj.getString(preferredLocaleObj.getString("language") + "_" + preferredLocaleObj.getString("country"));
        return firstName;
    }

    public override AuthResponse refresh(AuthToken oldToken)
    {
        string refreshToken = oldToken.refreshToken;
        if (refreshToken.IsNullOrWhiteSpace())
        {
            throw new Exception(AuthResponseStatus.REQUIRED_REFRESH_TOKEN.GetDesc());
        }
        string refreshTokenUrl = this.refreshTokenUrl(refreshToken);

        return new AuthResponse(AuthResponseStatus.SUCCESS.GetCode(), AuthResponseStatus.SUCCESS.GetDesc(), this.getToken(refreshTokenUrl));
    }

    /**
     * 获取token，适用于获取access_token和刷新token
     *
     * @param accessTokenUrl 实际请求token的地址
     * @return token对象
     */
    private AuthToken getToken(string accessTokenUrl)
    {
        var reqParams = new Dictionary<string, object>();
        reqParams.Add("Host", "www.linkedin.com");
        reqParams.Add("Content-Type", "application/x-www-form-urlencoded");

        string response = HttpUtils.RequestPost(accessTokenUrl, null, reqParams);
        string accessTokenStr = response;
        var accessTokenObject = accessTokenStr.parseObject();

        this.checkResponse(accessTokenObject);

        var authToken = new AuthToken();
        authToken.accessToken = accessTokenObject.getString("access_token");
        authToken.refreshToken = accessTokenObject.getString("refresh_token");
        authToken.expireIn = accessTokenObject.getInt32("expire_in");

        return authToken;
    }

    /**
     * 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("redirect_uri", config.redirectUri)
            .queryParam("scope", config.scope.IsNullOrWhiteSpace() ? "r_liteprofile%20r_emailaddress%20w_member_social" : config.scope)
            .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("projection", "(id,firstName,lastName,profilePicture(displayImage~:playableStreams))")
            .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"))
        {
            throw new Exception($"{dic.getString("error_description")}");
        }
    }
}