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use grammers_client::types::{Chat, Message, User};
use grammers_client::{Client, Update};
use log::debug;
use std::collections::HashMap;

use crate::db::Database;
use crate::handlers;

pub async fn handle_updates(
    mut tg: Client,
    chat_map: HashMap<i64, String>,
    db: &mut Database,
) -> Result<(), Box<dyn std::error::Error>> {
    let me = tg.get_me().await?;

    loop {
        match tg.next_update().await? {
            Update::NewMessage(message) => {
                match message.outgoing() {
                    true => debug!("out {}({}) ", message.chat().name(), message.chat().id()),
                    false => debug!("in {}({})", message.chat().name(), message.chat().id()),
                };

                if is_you(&me, &message) {
                    handlers::you_hander::handle_message(&mut tg, &message, chat_map.clone(), db)
                        .await?;
                } else if is_monitored_chat(&message, &db.get_chat_ids()) {
                    handlers::message_handler::handle_message(&mut tg, &message, db).await?;
                } else {
                    debug!(
                        "Ignoring update from {}({})",
                        message.chat().name(),
                        message.chat().id()
                    )
                }
            }
            _ => {}
        };
    }
}

fn is_you(me: &User, message: &Message) -> bool {
    let is_you = match message.sender() {
        Some(sender) => sender.id() == me.id(),
        None => false,
    };

    is_you
}

fn is_monitored_chat(message: &Message, chat_ids: &[i64]) -> bool {
    let direction = if message.outgoing() {
        "outgoing"
    } else {
        "incoming"
    };

    let chat = if matches!(message.chat(), Chat::User(_)) {
        "user"
    } else if matches!(message.chat(), Chat::Group(_)) {
        "group"
    } else if matches!(message.chat(), Chat::Channel(_)) {
        "channel"
    } else {
        "unknown"
    };

    debug!(
        "{}-{} ChatId:{} Watched?{} ",
        direction,
        chat,
        &message.chat().id(),
        chat_ids.contains(&message.chat().id()),
    );

    chat_ids.contains(&message.chat().id())
}