/**
 * Add WeChat login to your page and make requests to [WeChat APIs](https://developers.weixin.qq.com/doc/oplatform/Website_App/WeChat_Login/Authorized_Interface_Calling_UnionID.html).
 *
 * ### Setup
 *
 * #### Callback URL
 * ```
 * https://example.com/api/auth/callback/wechat
 * ```
 *
 * #### Configuration
 * ```ts
 * import { Auth } from "@auth/core"
 * import WeChat from "@auth/core/providers/wechat"
 *
 * const request = new Request(origin)
 * const response = await Auth(request, {
 *   providers: [WeChat({
 *     clientId: AUTH_WECHAT_APP_ID,
 *     clientSecret: AUTH_WECHAT_APP_SECRET,
 *     platformType: "OfficialAccount",
 *   })],
 * })
 * ```
 *
 * ### Resources
 *
 * - [WeChat Official Account](https://developers.weixin.qq.com/doc/offiaccount/Getting_Started/Overview.html)
 * - [WeChat Official Account - Webpage Authorization](https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/Wechat_webpage_authorization.html)
 * - [WeChat Official Account Test Account](https://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login)
 * - [WeChat WebsiteApp Login](https://developers.weixin.qq.com/doc/oplatform/Website_App/WeChat_Login/Wechat_Login.html)
 * - [使用微信测试账号对网页进行授权](https://cloud.tencent.com/developer/article/1703167)
 *
 * :::tip
 *
 * The WeChat provider comes with a [default configuration](https://github.com/nextauthjs/next-auth/blob/main/packages/core/src/providers/wechat.ts).
 * To override the defaults for your use case, check out [customizing a built-in OAuth provider](https://authjs.dev/guides/providers/custom-provider#override-default-options).
 *
 * :::
 *
 * :::info **Disclaimer**
 *
 * If you think you found a bug in the default configuration, you can [open an issue](https://authjs.dev/new/provider-issue).
 *
 * Auth.js strictly adheres to the specification and it cannot take responsibility for any deviation from
 * the spec by the provider. You can open an issue, but if the problem is non-compliance with the spec,
 * we might not pursue a resolution. You can ask for more help in [Discussions](https://authjs.dev/new/github-discussions).
 *
 * :::
 */
export default function WeChat(options) {
    const { clientId, clientSecret, platformType = "OfficialAccount" } = options;
    return {
        id: "wechat",
        name: "WeChat",
        type: "oauth",
        style: { logo: "/wechat.svg", bg: "#fff", text: "#000" },
        checks: ["state"],
        authorization: {
            url: platformType === "OfficialAccount"
                ? "https://open.weixin.qq.com/connect/oauth2/authorize"
                : "https://open.weixin.qq.com/connect/qrconnect",
            params: {
                appid: clientId,
                scope: platformType === "OfficialAccount"
                    ? "snsapi_userinfo"
                    : "snsapi_login",
            },
        },
        token: {
            url: "https://api.weixin.qq.com/sns/oauth2/access_token",
            params: { appid: clientId, secret: clientSecret },
            async conform(response) {
                const data = await response.json();
                if (data.token_type === "bearer") {
                    console.warn("token_type is 'bearer'. Redundant workaround, please open an issue.");
                    return response;
                }
                return Response.json({ ...data, token_type: "bearer" }, response);
            },
        },
        userinfo: {
            url: "https://api.weixin.qq.com/sns/userinfo",
            async request({ tokens, provider }) {
                if (!provider.userinfo)
                    return;
                const url = new URL(provider.userinfo.url);
                url.searchParams.set("access_token", tokens.access_token);
                url.searchParams.set("openid", String(tokens.openid));
                url.searchParams.set("lang", "zh_CN");
                const response = await fetch(url);
                return response.json();
            },
        },
        profile(profile) {
            return {
                id: profile.unionid,
                name: profile.nickname,
                email: null,
                image: profile.headimgurl,
            };
        },
        options,
    };
}
