// Copyright 2021 The Casdoor Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import React from "react";
import {Alert, Button, Result} from "antd";
import i18next from "i18next";
import {getWechatMessageEvent} from "./AuthBackend";
import * as Setting from "../Setting";
import * as Provider from "./Provider";

export function renderMessage(msg) {
  if (msg !== null) {
    return (
      <div style={{display: "inline"}}>
        <Alert
          message={i18next.t("application:Failed to sign in")}
          showIcon
          description={msg}
          type="error"
          action={
            <Button size="small" type="primary" danger>
              {i18next.t("product:Detail")}
            </Button>
          }
        />
      </div>
    );
  } else {
    return null;
  }
}

export function renderMessageLarge(ths, msg) {
  if (msg !== null) {
    return (
      <Result
        style={{margin: "0px auto"}}
        status="error"
        title={i18next.t("general:There was a problem signing you in..")}
        subTitle={msg}
        extra={[
          <Button type="primary" key="back" onClick={() => {
            window.history.go(-2);
          }}>
            {i18next.t("general:Back")}
          </Button>,
        ]}
      >
      </Result>
    );
  } else {
    return null;
  }
}

function getRefinedValue(value) {
  return value ?? "";
}

export function getCasParameters(params) {
  const queries = (params !== undefined) ? params : new URLSearchParams(window.location.search);
  const service = getRefinedValue(queries.get("service"));
  const renew = getRefinedValue(queries.get("renew"));
  const gateway = getRefinedValue(queries.get("gateway"));
  return {
    service: service,
    renew: renew,
    gateway: gateway,
  };
}

function getRawGetParameter(key) {
  const fullUrl = window.location.href;
  const token = fullUrl.split(`${key}=`)[1];
  if (!token) {
    return "";
  }

  let res = token.split("&")[0];
  if (!res) {
    return "";
  }

  res = decodeURIComponent(res);
  return res;
}

export function getOAuthGetParameters(params) {
  const queries = (params !== undefined) ? params : new URLSearchParams(window.location.search);
  const clientId = getRefinedValue(queries.get("client_id"));
  const responseType = getRefinedValue(queries.get("response_type"));

  let redirectUri = getRawGetParameter("redirect_uri");
  if (redirectUri === "") {
    redirectUri = getRefinedValue(queries.get("redirect_uri"));
  }

  let scope = getRefinedValue(queries.get("scope"));
  if (redirectUri.includes("#") && scope === "") {
    scope = getRawGetParameter("scope");
  }

  let state = getRefinedValue(queries.get("state"));
  if (state.startsWith("/auth/oauth2/login.php?wantsurl=")) {
    // state contains URL param encoding for Moodle, URLSearchParams automatically decoded it, so here encode it again
    state = encodeURIComponent(state);
  }
  if (redirectUri.includes("#") && state === "") {
    state = getRawGetParameter("state");
  }

  const nonce = getRefinedValue(queries.get("nonce"));
  const challengeMethod = getRefinedValue(queries.get("code_challenge_method"));
  const codeChallenge = getRefinedValue(queries.get("code_challenge"));
  const samlRequest = getRefinedValue(queries.get("SAMLRequest"));
  const relayState = getRefinedValue(queries.get("RelayState"));
  const noRedirect = getRefinedValue(queries.get("noRedirect"));

  if (clientId === "" && samlRequest === "") {
    // login
    return null;
  } else {
    // code
    return {
      clientId: clientId,
      responseType: responseType,
      redirectUri: redirectUri,
      scope: scope,
      state: state,
      nonce: nonce,
      challengeMethod: challengeMethod,
      codeChallenge: codeChallenge,
      samlRequest: samlRequest,
      relayState: relayState,
      noRedirect: noRedirect,
    };
  }
}

export function getStateFromQueryParams(applicationName, providerName, method, isShortState) {
  let query = window.location.search;
  query = `${query}&application=${encodeURIComponent(applicationName)}&provider=${encodeURIComponent(providerName)}&method=${method}`;
  if (method === "link") {
    query = `${query}&from=${window.location.pathname}`;
  }

  if (!isShortState) {
    return btoa(query);
  } else {
    const state = providerName;
    sessionStorage.setItem(state, query);
    return state;
  }
}

export function getQueryParamsFromState(state) {
  const query = sessionStorage.getItem(state);
  if (query === null) {
    return atob(state);
  } else {
    return query;
  }
}

export function getEvent(application, provider) {
  getWechatMessageEvent()
    .then(res => {
      if (res.data === "SCAN" || res.data === "subscribe") {
        Setting.goToLink(Provider.getAuthUrl(application, provider, "signup"));
      }
    });
}