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 partial class WeChatOpenAuthRequest : DefaultAuthRequest
{
    public WeChatOpenAuthRequest(ClientConfig config) : base(config, new WechatOpenAuthSource())
    {
    }

    public WeChatOpenAuthRequest(ClientConfig config, IAuthStateCache authStateCache)
        : base(config, new WechatOpenAuthSource(), authStateCache)
    {
    }

    /**
      * 微信的特殊性，此时返回的信息同时包含 openid 和 access_token
      *
      * @param authCallback 回调返回的参数
      * @return 所有信息
      */
    protected override AuthToken getAccessToken(AuthCallback authCallback)
    {
        return this.getToken(accessTokenUrl(authCallback.code));
    }

    protected override AuthUser getUserInfo(AuthToken authToken)
    {
        string openId = authToken.openId;

        string response = doGetUserInfo(authToken);
        var jsonObj = response.parseObject();

        this.checkResponse(jsonObj);

        //string location = String.format("%s-%s-%s", object.getString("country"), object.getString("province"), object.getString("city"));
        string location = $"{jsonObj.getString("country")}-{jsonObj.getString("province")}-{jsonObj.getString("city")}";
        if (jsonObj.ContainsKey("unionid"))
        {
            authToken.unionId = jsonObj.getString("unionid");
        }

        var authUser = new AuthUser();

        authUser.username = jsonObj.getString("nickname");
        authUser.nickname = jsonObj.getString("nickname");
        authUser.avatar = jsonObj.getString("headimgurl");
        authUser.location = location;
        authUser.uuid = openId;
        authUser.gender = GlobalAuthUtil.getWechatRealGender(jsonObj.getString("sex"));
        authUser.token = authToken;
        authUser.source = source.getName();

        authUser.originalUser = jsonObj;
        authUser.originalUserStr = response;

        return authUser;
    }

    public override AuthResponse refresh(AuthToken oldToken)
    {
        return new AuthResponse(Convert.ToInt32(AuthResponseStatus.SUCCESS), null, this.getToken(refreshTokenUrl(oldToken.refreshToken)));
    }

    /**
     * 检查响应内容是否正确
     *
     * @param object 请求响应内容
     */
    private void checkResponse(Dictionary<string, object> dic)
    {
        if (dic.ContainsKey("errcode"))
        {
            throw new Exception($"errcode: {dic.getString("errcode")}, errmsg: {dic.getString("errmsg")}");
        }
    }

    /**
     * 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)
    {
        string response = HttpUtils.RequestGet(accessTokenUrl);
        var accessTokenObject = response.parseObject();

        this.checkResponse(accessTokenObject);

        var authToken = new AuthToken();

        authToken.accessToken = accessTokenObject.getString("access_token");
        authToken.refreshToken = accessTokenObject.getString("refresh_token");
        authToken.expireIn = accessTokenObject.getInt32("expires_in");
        authToken.openId = accessTokenObject.getString("openid");

        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("appid", config.clientId)
            .queryParam("redirect_uri", GlobalAuthUtil.urlEncode(config.redirectUri))
            .queryParam("response_type", "code")
            .queryParam("scope", config.scope.IsNullOrWhiteSpace() ? "snsapi_login" : config.scope)
            .queryParam("state", getRealState(state))
            .build();
    }

    /**
     * 返回获取accessToken的url
     *
     * @param code 授权码
     * @return 返回获取accessToken的url
     */
    protected override string accessTokenUrl(string code)
    {
        return UrlBuilder.fromBaseUrl(source.accessToken())
            .queryParam("appid", config.clientId)
            .queryParam("secret", config.clientSecret)
            .queryParam("code", code)
            .queryParam("grant_type", "authorization_code")
            .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)
            .queryParam("openid", authToken.openId)
            .queryParam("lang", "zh_CN")
            .build();
    }

    /**
     * 返回获取userInfo的url
     *
     * @param refreshToken getAccessToken方法返回的refreshToken
     * @return 返回获取userInfo的url
     */
    protected override string refreshTokenUrl(string refreshToken)
    {
        return UrlBuilder.fromBaseUrl(source.refresh())
            .queryParam("appid", config.clientId)
            .queryParam("grant_type", "refresh_token")
            .queryParam("refresh_token", refreshToken)
            .build();
    }
}