import { app } from "electron";
import { parseAuthRes } from "@/auth";
import { postAuth, postLogin, postLogout } from "@/api/account";
import { updateAppUI, launchSession, endSession } from "@/session";
import { getToken, setToken, clearToken } from "./store";
import { backgroundMitt, ipcEmit } from "@/composables/useEmitter";


/* Either null or a crimataId */
let account: string | null = null;


export const accountAuth = async (): Promise<void> => {

    /* attempt to get a login token from the store */
    const token = getToken();

    try {

        if (token) {

            // attempt to login with token
            const res = await postAuth(token);
            const parsed = parseAuthRes(res);

            // save jwt token and profile
            setToken(parsed.token);
            account = parsed.crimataId

            // launch session
            launchSession(parsed.token);

        } else throw(new Error('Failed to authenticate (no token).'));

    } catch (e) {
        console.log(e);
        clearToken();

    } finally {

        // push state changes to the frontend
        updateAppState();

    }

};

export const accountLogin = async (payload: any): Promise<Error | void> => {

     const creds = payload as AccountCredentials;

     try {

         // attempt login with email password
         const res = await postLogin(creds.email, creds.password);
         const parsed = parseAuthRes(res);

         // save jwt token and profile
         setToken(parsed.token);
         account = parsed.crimataId;

         // launch session
         launchSession(parsed.token);

         // push state changes to the frontend
         updateAppState();

         return;

     } catch(e) {
         clearToken();
         throw e;
     }

}

export const accountLogout = async (): Promise<Error | void> => {

    try {
        // post logout to backend
        await postLogout();

        // remove key and account
        clearToken();
        account = null;

        // push account state to browser
        ipcEmit("set-account", account);

        // kill crimata platform session
        endSession();

        return;

    } catch(e) {
        console.log('[ACCOUNT]', e);
        return (new Error('Failed to logout. Please try again.'));
    }

}

// logout when auth fails on platform end
backgroundMitt.on("close-auth-fail", async (_payload: any) => {

    await accountLogout();

});

// emits state of account, version, and UI
export const updateAppState = () => {

    ipcEmit("set-account", account);

    ipcEmit("set-version", app.getVersion());

    updateAppUI();

}