extern crate percent_encoding;
extern crate reqwest;
#[macro_use]
extern crate serde_derive;
extern crate serde_json;
extern crate toml;

use std::fs::File;
use std::io::Read;
use reqwest::header::{Authorization, Bearer};
use std::collections::HashMap;
use percent_encoding::{utf8_percent_encode, SIMPLE_ENCODE_SET};

#[derive(Serialize, Deserialize)]
pub struct Config {
    rooms: Vec<Room>,
    homeserver: String,
    token: String,
}

#[derive(Serialize, Deserialize)]
pub struct Room {
    id: String,
    name_endpoint: String,
}

fn main() {
    //Get config
    let mut file = match File::open("roomnamebot.toml") {
        Ok(file) => file,
        Err(_) => {
            println!("Could not open roomnamebot.toml");
            return;
        }
    };
    let mut contents = String::new();
    match file.read_to_string(&mut contents) {
        Ok(_) => {}
        Err(_) => {
            println!("Couldn't read roomnamebot.toml to string");
            return;
        }
    };
    let config: Config = match toml::from_str(&contents) {
        Ok(config) => config,
        Err(_) => {
            println!("Couldn't deserialize roomnamebot.toml");
            return;
        }
    };
    let http_client = reqwest::Client::new();
    //Iterate over rooms
    for room in config.rooms {
        //Get new room name
        let name = match http_client.get(&room.name_endpoint).send() {
            Ok(mut response) => match response.text() {
                Ok(name) => name,
                Err(_) => {
                    println!("Something went wrong getting the room name for {}", room.id);
                    continue;
                }
            },
            Err(_) => {
                println!("Something went wrong getting the room name for {}", room.id);
                continue;
            }
        };

        //create map for event content
        let mut map = HashMap::new();
        map.insert("name", name);

        //And now send it
        match http_client
            .put(&format!(
                "{homeserver}/_matrix/client/r0/rooms/{room_id}/state/m.room.name",
                homeserver = config.homeserver,
                room_id = utf8_percent_encode(&room.id, SIMPLE_ENCODE_SET)
            ))
            .header(Authorization(Bearer {
                token: config.token.clone(),
            }))
            .json(&map)
            .send()
        {
            Ok(_) => {}
            Err(_) => {
                println!("Something went wrong setting the room name for {}", room.id);
                continue;
            }
        }
    }
}