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const {  session, Markup, Scenes, Telegraf } = require('telegraf');
require('dotenv').config();

const clientsQueue = [];

const bot = new Telegraf(process.env.BOT_TOKEN);

const welcomeScene = new Scenes.BaseScene("welcome-scene");
welcomeScene.enter(async ctx => {
    await ctx.replyWithMarkdownV2("Welcome",
        Markup.inlineKeyboard(
            [
                Markup.button.url("🌐 Website", "<some_url>"),
                Markup.button.url("📞 Support", "<some_url>")
            ])
    );
});
welcomeScene.on("message", async ctx => await ctx.reply("Click on buttons to continue"));

const secondScene = new Scenes.BaseScene("second-scene");
secondScene.enter(async ctx => {
    await ctx.deleteMessage();

    //Need to add to clients queue
    clientsQueue.push(ctx)

    await ctx.replyWithMarkdownV2("People in second scene: " + clientsQueue.length,
        Markup.inlineKeyboard([
            Markup.button.callback("❌ Close", "close"),
        ])
    );
});
secondScene.action("close", async ctx => {
    await ctx.deleteMessage();

    //need to remove from clients queue
    clientsQueue.splice(clientsQueue.map(x => x.chatId).indexOf(ctx.chat.id), 1);
    ctx.scene.enter('welcome-scene');
});
secondScene.on("message", async ctx => await ctx.reply("Click on buttons to continue"));

const stage = new Scenes.Stage([welcomeScene, secondScene]);

bot.use(session());
bot.use(stage.middleware());

bot.command('start', (ctx) => ctx.scene.enter('welcome-scene'));
bot.action('start', (ctx) => ctx.scene.enter('welcome-scene'));
bot.command('second', (ctx) => ctx.scene.enter('second-scene'));
bot.action('second', (ctx) => ctx.scene.enter('second-scene'));

bot.on("message", (ctx) => ctx.scene.enter('welcome-scene'));

bot.launch();

// Enable graceful stop
process.once('SIGINT', () => bot.stop('SIGINT'));
process.once('SIGTERM', () => bot.stop('SIGTERM'));