import * as path from "path";
import * as electron from "electron";
import * as fs from "fs-extra";

import {BrowserWindow, ipcMain as ipc} from "electron";
import {Arguments, process_args} from "../../shared/process-arguments";
import {main_window} from "../main_window";
import * as winmgr from "../window";

export interface UserData {
    session_id: string;
    username: string;

    application_data: string;
    application_data_sign: string;
}

let current_window: BrowserWindow;
let _current_data: UserData;

function update_data(data?: UserData) {
    _current_data = data;
    electron.webContents.getAllWebContents().forEach(content => {
        content.send('teaforo-update', data);
    });
}

function config_file_path() {
    return path.join(electron.app.getPath('userData'), "forum_data.json");
}

async function load_data() {
    try {
        const file = config_file_path();
        if((await fs.stat(file)).isFile()) {
            const raw_data = await fs.readFile(config_file_path());
            const data = JSON.parse(raw_data.toString());
            update_data(data as UserData);
            console.log("Initialized forum account from config!");
        } else {
            console.log("Missing forum config file. Ignoring forum auth");
        }
    } catch(error) {
        console.error("Failed to load forum account connection: %o", error);
    }
}

async function save_data() {
    const file = config_file_path();
    try {
        await fs.ensureFile(file);
    } catch(error) {
        console.error("Failed to ensure forum config file as file %o", error);
    }
    try {
        await fs.writeJSON(file, _current_data);
    } catch(error) {
        console.error("Failed to save forum config: %o", error);
    }
}

export function open_login(enforce: boolean = false) : Promise<UserData> {
    if(_current_data && !enforce) return Promise.resolve(_current_data);

    if(current_window) {
        current_window.close();
        current_window = undefined;
    }
    current_window = new BrowserWindow({
        width: 400,
        height: 400,
        show: true,
        parent: main_window,
        webPreferences: {
            webSecurity: false,
            nodeIntegration: true
        },
    });
    current_window.setMenu(null);
    winmgr.apply_bounds('forum-manager', current_window);
    winmgr.track_bounds('forum-manager', current_window);
    console.log("Main: " + main_window);

    current_window.loadFile(path.join(path.dirname(module.filename), "ui", "index.html"));
    if(process_args.has_flag(...Arguments.DEV_TOOLS))
        current_window.webContents.openDevTools();

    return new Promise<UserData>((resolve, reject) => {
        let response = false;
        ipc.once("teaforo-callback", (event, data) => {
            if(response) return;
            response = true;
            current_window.close();
            current_window = undefined;

            update_data(data);
            save_data();
            if(data)
                resolve(data);
            else
                reject();
        });

        current_window.on('closed', event => {
            if(response) return;
            response = true;

            current_window = undefined;
            reject();
        });
    });
}

export function current_data() : UserData | undefined {
    return this._current_data;
}

export function logout() {
    update_data(undefined);
    save_data();
}

export async function initialize() {
    await load_data();
}

export function setup() {
    ipc.on('teaforo-login', event => {
        open_login().catch(error => {}); //TODO may local notify
    });

    ipc.on('teaforo-logout', event => {
        logout();
    });
    ipc.on('teaforo-update', event => {
        update_data(_current_data);
    });
}