pub mod telegram_types;

use reqwest;
use telegram_types::{TelegramKeyboardMarkup, TelegramUpdate};
use std::borrow::Borrow;
use serde_json::json;
use redis::{self, Commands, RedisError};
use serde_json;
use std::env;
//use shit_post_db::DatabaseConnection;


pub struct TelegramBot {
    token: String,
    //db_conn: DatabaseConnection,
    redis_client: redis::Client,
}

impl TelegramBot {

    pub fn new(token: String, redis_client: redis::Client) -> Self {
        Self {
            token, redis_client
        }
    }

    fn make_url(&self, api_endpoint: &str) -> String {
        format!("https://api.telegram.org/bot{:}/{:}", self.token, api_endpoint)
    }

    pub async fn get_updates(&self) -> Result<Vec<TelegramUpdate>, reqwest::Error> {

        let responce = reqwest::get(
            self.make_url("getUpdates")
        ).await?;

        let mut data: telegram_types::TelegramResponce = responce
        //.text()
        .json::<telegram_types::TelegramResponce>()
        .await?;

        data.result.sort_by(|a, b| a.message.date.cmp(&b.message.date));

        println!("{:?}", &data.result);
        Ok(data.result)

    }

    pub async fn send_message(
        &self, chat_id: i64, text: &str, keyboard: &TelegramKeyboardMarkup
    ) -> Result<(), reqwest::Error> {

        let responce = reqwest::Client::new().post(
            self.make_url("sendMessage"))
            .json(
                json!({
                    "chat_id": chat_id,
                    "text": text,
                    "reply_markup": keyboard
                }).borrow()
            ).send().await?;

        println!("Responce -> | {:?} |", responce);

        Ok(())

    }

    pub fn mark_as_handled(&self, update_id: i64) -> Result<(), RedisError> {

        let mut con = self.redis_client.get_connection()?;
        // throw away the result, just make sure it does not fail
        let _ : () = con.set(update_id, true)?;
        Ok(())
    }

    pub fn check_if_handled(&self, update_id: i64) -> Result<bool, RedisError> {

        let mut con = self.redis_client.get_connection()?;
        // throw away the result, just make sure it does not fail
        Ok(con.get(update_id)?)
    }

    pub async fn update_webhook(&self) -> Result<(), reqwest::Error> {

        let webhook = env::var("WEBHOOK_ADDR").expect("WEBHOOK_ADDR is not set in .env file");

        let _ = reqwest::Client::new().get(
            self.make_url("setWebhook") + &format!("?url={:}", webhook)
        ).send().await?;

        Ok(())
    }

}