mod key_value_table;
mod identity;
mod crypto;
mod session_manager;
mod protocol;
mod utils;
mod ui_interface;
mod constants;
mod discovery;

use std::{env, fs, io::{self, Cursor}, net::SocketAddr, str::{FromStr, from_utf8}, sync::{Arc, RwLock}, cmp::Ordering};
use image::GenericImageView;
use tokio::{net::TcpListener, runtime::Handle, sync::mpsc, task::JoinError};
use tungstenite::Message;
use actix_web::{App, HttpRequest, HttpResponse, HttpServer, http::header, cookie::CookieBuilder, web, web::Data};
use actix_multipart::Multipart;
use futures::{StreamExt, TryStreamExt};
use rand::{RngCore, rngs::OsRng};
use serde::{Deserialize, Serialize};
use uuid::Uuid;
use platform_dirs::AppDirs;
use zeroize::Zeroize;
use utils::escape_double_quote;
use identity::Identity;
use session_manager::{SessionManager, SessionCommand};
use ui_interface::UiConnection;

async fn start_websocket_server(ui_auth_token: Arc<RwLock<Option<String>>>, session_manager: Arc<SessionManager>) -> u16 {
    let websocket_bind_addr = env::var("AIRA_WEBSOCKET_ADDR").unwrap_or_else(|_| "127.0.0.1".to_owned());
    let websocket_port = env::var("AIRA_WEBSOCKET_PORT").unwrap_or_else(|_| "0".to_owned());
    let server = TcpListener::bind(websocket_bind_addr+":"+&websocket_port).await.unwrap();
    let websocket_port = server.local_addr().unwrap().port();
    tokio::spawn(async move {
        loop {
            let (stream, _addr) = server.accept().await.unwrap();
            let ui_auth_token = {
                ui_auth_token.read().unwrap().clone()
            };
            if let Some(ui_auth_token) = ui_auth_token {
                let stream = stream.into_std().unwrap();
                stream.set_nonblocking(false).unwrap();
                match tungstenite::accept(stream) {
                    Ok(mut websocket) => {
                        if let Ok(message) = websocket.read_message() { //waiting for auth token
                            match message.into_text() {
                                Ok(token) => {
                                    if token == ui_auth_token {
                                        let ui_connection = UiConnection::new(websocket);
                                        session_manager.set_ui_connection(ui_connection.clone());
                                        websocket_worker(ui_connection, session_manager.clone()).await.unwrap();
                                    }
                                }
                                Err(e) => print_error!(e)
                            }
                        }
                    }
                    Err(e) => print_error!(e)
                }
            }
        }
    });
    websocket_port
}

fn discover_peers(session_manager: Arc<SessionManager>) {
    tokio::spawn(async move {
        discovery::discover_peers(move |discovery_manager, ip| {
            let session_manager = session_manager.clone();
            if session_manager.is_identity_loaded() {
                tokio::spawn( async move {
                    if SessionManager::connect_to(session_manager, ip).await.is_err() {
                        print_error!("Failed to connect to: {}", ip);
                    }
                });
            } else {
                discovery_manager.stop_service_discovery();
            }
        });
    });
}

fn load_msgs(session_manager: &SessionManager, ui_connection: &mut UiConnection, session_id: &usize) {
    if let Some(msgs) = session_manager.load_msgs(session_id, constants::MSG_LOADING_COUNT) {
        ui_connection.load_msgs(session_id, &msgs);
    }
}

async fn websocket_worker(mut ui_connection: UiConnection, session_manager: Arc<SessionManager>) -> Result<(), JoinError> {
    ui_connection.set_name(&session_manager.identity.read().unwrap().as_ref().unwrap().name);
    session_manager.list_contacts().into_iter().for_each(|contact|{
        ui_connection.set_as_contact(contact.0, &contact.1, contact.2, &crypto::generate_fingerprint(&contact.3));
        session_manager.last_loaded_msg_offsets.write().unwrap().insert(contact.0, 0);
        load_msgs(&session_manager, &mut ui_connection, &contact.0);
    });
    session_manager.sessions.read().unwrap().iter().for_each(|session| {
        ui_connection.on_new_session(
            session.0,
            &session.1.name,
            session.1.outgoing,
            &crypto::generate_fingerprint(&session.1.peer_public_key),
            session.1.ip,
            session.1.files_download.as_ref()
        );
    });
    {
        let not_seen = session_manager.not_seen.read().unwrap();
        if not_seen.len() > 0 {
            ui_connection.set_not_seen(&not_seen);
        }
    }
    session_manager.get_saved_msgs().into_iter().for_each(|msgs| {
        if !msgs.1.is_empty() {
            ui_connection.load_msgs(&msgs.0, &msgs.1);
        }
    });
    session_manager.pending_msgs.lock().unwrap().iter().for_each(|entry| {
        entry.1.iter().for_each(|buff| {
            match buff[0] {
                protocol::Headers::MESSAGE => match from_utf8(&buff[1..]) {
                    Ok(msg) => ui_connection.new_pending_msg(entry.0, false, msg),
                    Err(e) => print_error!(e)
                }
                protocol::Headers::FILE => if let Some(filename) = protocol::get_file_name(buff) {
                    ui_connection.new_pending_msg(entry.0, true, filename);
                }
                _ => {}
            }
        });
    });
    let mut ips = Vec::new();
    match if_addrs::get_if_addrs() {
        Ok(ifaces) => for iface in ifaces {
            if !iface.is_loopback() {
                ips.push(iface.ip());
            }
        }
        Err(e) => print_error!(e)
    }
    ui_connection.set_local_ips(&ips);
    discover_peers(session_manager.clone());
    let handle = Handle::current();
    tokio::task::spawn_blocking(move || {
        loop {
            match ui_connection.websocket.read_message() {
                Ok(msg) => {
                    if msg.is_ping() {
                        ui_connection.write_message(Message::Pong(Vec::new())); //not sure if I'm doing this right
                    } else if msg.is_text() {
                        let msg = msg.into_text().unwrap();
                        #[cfg(debug_assertions)]
                        println!("Message: {}", msg);
                        let mut ui_connection = ui_connection.clone();
                        let session_manager = session_manager.clone();
                        handle.spawn(async move {
                            let args: Vec<&str> = msg.split_whitespace().collect();
                            match args[0] {
                                "set_seen" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    session_manager.set_seen(session_id, true);
                                }
                                "connect" => {
                                    match args[1].parse() {
                                        Ok(ip) => if SessionManager::connect_to(session_manager.clone(), ip).await.is_err() {
                                            print_error!("Failed to connect to: {}", ip);
                                        }
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "refresh" => discover_peers(session_manager.clone()),
                                "send" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    let msg_content = &msg[args[0].len()+args[1].len()+2..];
                                    let buffer = protocol::new_message(msg_content);
                                    #[allow(unused_must_use)] {
                                        if let Ok(sent) = session_manager.send_or_add_to_pending(&session_id, buffer).await {
                                            if !sent {
                                                ui_connection.new_pending_msg(&session_id, false, msg_content);
                                            }
                                        }
                                    }
                                }
                                "large_files" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    let mut file_info = Vec::new();
                                    for n in (2..args.len()).step_by(2) {
                                        file_info.push((args[n].parse::<u64>().unwrap(), base64::decode(args[n+1]).unwrap()));
                                    }
                                    #[allow(unused_must_use)] {
                                        session_manager.send_or_add_to_pending(&session_id, protocol::ask_large_files(file_info)).await;
                                    }
                                }
                                "download" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    session_manager.send_command(&session_id, SessionCommand::Send {
                                        buff: vec![protocol::Headers::ACCEPT_LARGE_FILES]
                                    }).await;
                                }
                                "abort" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    session_manager.send_command(&session_id, SessionCommand::Send {
                                        buff: vec![protocol::Headers::ABORT_FILES_TRANSFER]
                                    }).await;
                                }
                                "sending_ended" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    session_manager.send_command(&session_id, SessionCommand::SendingEnded).await;
                                }
                                "load_msgs" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    load_msgs(&session_manager, &mut ui_connection, &session_id);
                                }
                                "contact" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    match session_manager.add_contact(session_id) {
                                        Ok(_) => {},
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "uncontact" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    match session_manager.remove_contact(&session_id) {
                                        Ok(_) => {},
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "verify" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    match session_manager.set_verified(&session_id) {
                                        Ok(_) => {},
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "delete_conversation" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    match session_manager.delete_conversation(session_id) {
                                        Ok(_) => {},
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "refresh_profile" => {
                                    let session_id: usize = args[1].parse().unwrap();
                                    session_manager.send_command(&session_id, SessionCommand::Send {
                                        buff: protocol::ask_profile_info()
                                    }).await;
                                }
                                "remove_avatar" => {
                                    match session_manager.remove_avatar().await {
                                        Ok(_) => ui_connection.on_avatar_changed(None),
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "set_use_padding" => {
                                    let use_padding: bool = args[1].parse().unwrap();
                                    if let Err(e) = session_manager.identity.write().unwrap().as_mut().unwrap().set_use_padding(use_padding) {
                                        print_error!(e);
                                    }
                                }
                                "change_name" => {
                                    let new_name = &msg[args[0].len()+1..];
                                    match session_manager.change_name(new_name.to_string()).await {
                                        Ok(_) => ui_connection.set_name(new_name),
                                        Err(e) => print_error!(e)
                                    };
                                }
                                "change_password" => {
                                    let (old_password, new_password) = if args.len() == 3 {
                                        (Some(base64::decode(args[1]).unwrap()), Some(base64::decode(args[2]).unwrap()))
                                    } else if Identity::is_protected().unwrap() { //sent old_password
                                        (Some(base64::decode(args[1]).unwrap()), None)
                                    } else { //sent new password
                                        (None, Some(base64::decode(args[1]).unwrap()))
                                    };
                                    let result = Identity::change_password(old_password.as_deref(), new_password.as_deref());
                                    if let Some(mut old_password) = old_password {
                                        old_password.zeroize();
                                    }
                                    let is_identity_protected = if let Some(mut new_password) = new_password {
                                        new_password.zeroize();
                                        true
                                    } else {
                                        false
                                    };
                                    match result {
                                        Ok(success) => ui_connection.password_changed(success, is_identity_protected),
                                        Err(e) => print_error!(e)
                                    }
                                }
                                "disappear" => {
                                    match Identity::delete_identity() {
                                        Ok(_) => ui_connection.logout(),
                                        Err(e) => print_error!(e)
                                    }
                                }
                                _ => print_error!("Unknown websocket message: {}", msg)
                            }
                        });
                    }
                }
                Err(e) => {
                    match e {
                        tungstenite::Error::ConnectionClosed => {
                            break;
                        }
                        _ => print_error!(e)
                    }
                }
            }
        }
    }).await
}

fn is_authenticated(req: &HttpRequest) -> bool {
    if let Some(cookie) = req.cookie(constants::HTTP_COOKIE_NAME) {
        let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
        if let Some(token) = global_vars.ui_auth_token.read().unwrap().as_ref() {
            return token == cookie.value();
        }
    }
    false
}

async fn handle_set_avatar(req: HttpRequest, mut payload: Multipart) -> HttpResponse {
    if let Ok(Some(mut field)) = payload.try_next().await {
        let content_disposition = field.content_disposition();
        if let Some(name) = content_disposition.get_name() {
            if name == "avatar" {
                let mut buffer = Vec::new();
                while let Some(Ok(chunk)) = field.next().await {
                    buffer.extend(chunk);
                }
                match image::guess_format(&buffer) {
                    Ok(format) => {
                        match image::load_from_memory_with_format(&buffer, format) {
                            Ok(image) => {
                                let (width, height) = image.dimensions();
                                let image = match width.cmp(&height) {
                                    Ordering::Greater => image.crop_imm((width-height)/2, 0, height, height),
                                    Ordering::Less => image.crop_imm(0, (height-width)/2, width, width),
                                    Ordering::Equal => image,
                                };
                                let mut avatar = Vec::new();
                                image.write_to(&mut Cursor::new(&mut avatar), format).unwrap();
                                let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
                                let session_manager = &global_vars.session_manager;
                                let is_authenticated = is_authenticated(&req);
                                let is_running = session_manager.is_identity_loaded();
                                if is_authenticated || !is_running {
                                    match Identity::set_identity_avatar(&avatar) {
                                        Ok(_) => {
                                            if is_authenticated && is_running {
                                                session_manager.send_avatar(&avatar).await;
                                            }
                                            return HttpResponse::Ok().finish();
                                        }
                                        Err(e) => {
                                            print_error!(e);
                                            return HttpResponse::InternalServerError().finish();
                                        }
                                    }
                                }
                            }
                            Err(e) => print_error!(e)
                        }
                    }
                    Err(e) => print_error!(e)
                }
            }
        }
    }
    HttpResponse::BadRequest().finish()
}

fn reply_with_avatar(avatar: Option<Vec<u8>>, name: Option<&str>) -> HttpResponse {
    match avatar {
        Some(avatar) => HttpResponse::Ok().content_type("image/*").body(avatar),
        None => match name {
            Some(name) => {
                #[cfg(not(debug_assertions))]
                let svg = include_str!(concat!(env!("OUT_DIR"), "/text_avatar.svg"));
                #[cfg(debug_assertions)]
                let svg = replace_fields("src/frontend/imgs/text_avatar.svg");
                HttpResponse::Ok().content_type("image/svg+xml").body(svg.replace("LETTER", &name.chars().next().unwrap_or('?').to_string()))
            }
            None => HttpResponse::InternalServerError().finish()
        }
    }
}

async fn handle_avatar(req: HttpRequest) -> HttpResponse {
    let splits: Vec<&str> = req.path()[1..].split('/').collect();
    if splits.len() == 2 {
        if splits[1] == "self" {
            return reply_with_avatar(Identity::get_identity_avatar().ok(), Identity::get_identity_name().ok().as_deref());
        }
    } else if splits.len() == 3 && is_authenticated(&req) {
        if let Ok(session_id) = splits[1].parse() {
            let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
            return reply_with_avatar(global_vars.session_manager.get_avatar(&session_id), Some(splits[2]));
        }
    }
    HttpResponse::BadRequest().finish()
}

#[derive(Deserialize, Serialize, Debug)]
struct FileInfo {
    uuid: String,
    file_name: String,
}
async fn handle_load_file(req: HttpRequest, file_info: web::Query<FileInfo>) -> HttpResponse {
    if is_authenticated(&req) {
        match Uuid::from_str(&file_info.uuid) {
            Ok(uuid) => {
                let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
                if let Some(buffer) = global_vars.session_manager.identity.read().unwrap().as_ref().unwrap().load_file(uuid) {
                    return HttpResponse::Ok().append_header(("Content-Disposition", format!("attachment; filename=\"{}\"", escape_double_quote(html_escape::decode_html_entities(&file_info.file_name).to_string())))).content_type("application/octet-stream").body(buffer);
                }
            }
            Err(e) => print_error!(e)
        }
    }
    HttpResponse::NotFound().finish()
}

async fn handle_send_file(req: HttpRequest, mut payload: Multipart) -> HttpResponse {
    if is_authenticated(&req) {
        let mut session_id: Option<usize> = None;
        while let Ok(Some(mut field)) = payload.try_next().await {
            let content_disposition = field.content_disposition();
            if let Some(name) = content_disposition.get_name() {
                if name == "session_id" {
                    if let Some(Ok(raw_id)) = field.next().await {
                        session_id = Some(from_utf8(&raw_id).unwrap().parse().unwrap());
                    }
                } else if session_id.is_some() {
                    let filename = content_disposition.get_filename().unwrap().to_owned();
                    let session_id = session_id.unwrap();
                    let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
                    if req.path() == "/send_file" {
                        let mut buffer = Vec::new();
                        while let Some(Ok(chunk)) = field.next().await {
                            buffer.extend(chunk);
                        }
                        if let Ok(sent) = global_vars.session_manager.send_or_add_to_pending(&session_id, protocol::file(&filename, &buffer)).await {
                            return if sent {
                                HttpResponse::Ok().finish()
                            } else {
                                HttpResponse::Ok().body("pending")
                            };
                        }
                    } else {
                        let (ack_sender, mut ack_receiver) = mpsc::channel(1);
                        let mut pending_buffer = Vec::new();
                        let mut chunk_buffer = Vec::with_capacity(constants::FILE_CHUNK_SIZE);
                        chunk_buffer.push(protocol::Headers::LARGE_FILE_CHUNK);
                        ack_sender.send(true).await.unwrap();
                        loop {
                            chunk_buffer.extend(&pending_buffer);
                            pending_buffer.clear();
                            while let Some(Ok(chunk)) = field.next().await {
                                if chunk_buffer.len()+chunk.len() <= constants::FILE_CHUNK_SIZE {
                                    chunk_buffer.extend(chunk);
                                } else if chunk_buffer.len() == constants::FILE_CHUNK_SIZE {
                                    pending_buffer.extend(chunk);
                                    break;
                                } else {
                                    let remaining = constants::FILE_CHUNK_SIZE - chunk_buffer.len();
                                    chunk_buffer.extend(&chunk[..remaining]);
                                    pending_buffer.extend(&chunk[remaining..]);
                                    break;
                                }
                            }
                            if !global_vars.session_manager.send_command(&session_id, SessionCommand::EncryptFileChunk{
                                plain_text: chunk_buffer.clone()
                            }).await {
                                return HttpResponse::InternalServerError().finish();
                            }
                            if !match ack_receiver.recv().await {
                                Some(should_continue) => {
                                    //send previous encrypted chunk even if transfert is aborted to keep PSEC nonces syncrhonized
                                    if global_vars.session_manager.send_command(&session_id, SessionCommand::SendEncryptedFileChunk {
                                        ack_sender: ack_sender.clone()
                                    }).await {
                                        should_continue
                                    } else {
                                        false
                                    }
                                }
                                None => false
                            } {
                                return HttpResponse::InternalServerError().finish()
                            }
                            if chunk_buffer.len() < constants::FILE_CHUNK_SIZE {
                                break;
                            } else {
                                chunk_buffer.truncate(1);
                            }
                        }
                        return HttpResponse::Ok().finish();
                    }
                }
            }
        }
    }
    HttpResponse::BadRequest().finish()
}

async fn handle_logout(req: HttpRequest) -> HttpResponse {
    if is_authenticated(&req) {
        let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
        if global_vars.session_manager.is_identity_loaded() {
            *global_vars.ui_auth_token.write().unwrap() = None;
            global_vars.session_manager.stop().await;
        }
        if Identity::is_protected().unwrap_or(true) {
            HttpResponse::Found().append_header((header::LOCATION, "/")).finish()
        } else {
            #[cfg(debug_assertions)]
            let html = fs::read_to_string("src/frontend/logout.html").unwrap();
            #[cfg(not(debug_assertions))]
            let html = include_str!("frontend/logout.html");
            HttpResponse::Ok().body(html)
        }
    } else {
        HttpResponse::Unauthorized().finish()
    }
}

fn login(identity: Identity, global_vars: &GlobalVars) -> HttpResponse {
    let session_manager = global_vars.session_manager.clone();
    if !session_manager.is_identity_loaded() {
        session_manager.set_identity(Some(identity));
        global_vars.tokio_handle.spawn(async move {
            if SessionManager::start_listener(session_manager).await.is_err() {
                print_error!("You won't be able to receive incomming connections from other peers.");
            }
        });
    }
    let mut raw_cookie = [0; 32];
    OsRng.fill_bytes(&mut raw_cookie);
    let cookie_value = base64::encode(raw_cookie);
    *global_vars.ui_auth_token.write().unwrap() = Some(cookie_value.clone());
    let cookie = CookieBuilder::new(constants::HTTP_COOKIE_NAME, cookie_value).max_age(time::Duration::hours(4)).finish();
    HttpResponse::Found()
        .append_header((header::LOCATION, "/"))
        .insert_header((header::SET_COOKIE, cookie.to_string()))
        .finish()
}

fn on_identity_loaded(identity: Identity, global_vars: &Arc<GlobalVars>) -> HttpResponse {
    match Identity::clear_cache() {
        Ok(_) => {},
        Err(e) => print_error!(e)
    }
    login(identity, global_vars)
}

#[derive(Serialize, Deserialize)]
struct LoginParams {
    password: String,
}
async fn handle_login(req: HttpRequest, mut params: web::Form<LoginParams>) -> HttpResponse {
    let response = match Identity::load_identity(Some(params.password.as_bytes())) {
        Ok(identity) => {
            let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
            on_identity_loaded(identity, global_vars)
        }
        Err(e) => generate_login_response(Some(&e))
    };
    params.password.zeroize();
    response
}

fn get_login_body(error_msg: Option<&str>) -> Result<String, rusqlite::Error> {
    #[cfg(debug_assertions)]
    let html = replace_fields("src/frontend/login.html");
    #[cfg(not(debug_assertions))]
    let html = include_str!(concat!(env!("OUT_DIR"), "/login.html"));
    Ok(html
        .replace("ERROR_MSG", &match error_msg {
            Some(error_msg) => format!("Error: {}.", error_msg),
            None => String::new()
        })
        .replace("IDENTITY_NAME", &match Identity::get_identity_name() {
                Ok(name) => format!("\"{}\"", html_escape::encode_double_quoted_attribute(&name)),
                Err(_) => {
                    if let Err(e) = Identity::remove_identity_avatar() {
                        print_error!(e);
                    }
                    "null".to_owned()
                }
            }
        )
    )
}

fn generate_login_response(error_msg: Option<&str>) -> HttpResponse {
    match get_login_body(error_msg) {
        Ok(body) => HttpResponse::Ok().body(body),
        Err(e) => {
            print_error!(e);
            HttpResponse::InternalServerError().body(e.to_string())
        }
    }
}

#[derive(Serialize, Deserialize)]
struct CreateParams {
    name: String,
    password: String,
    password_confirm: String,
}
async fn handle_create(req: HttpRequest, mut params: web::Form<CreateParams>) -> HttpResponse {
    let response = if params.password == params.password_confirm {
        match Identity::create_identidy(
            &params.name,
            if params.password.is_empty() { //no password
                None
            } else {
                Some(params.password.as_bytes())
            }
        ) {
            Ok(identity) => {
                let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
                login(identity, global_vars)
            }
            Err(e) => {
                print_error!(e);
                generate_login_response(Some(&e.to_string()))
            }
        }
    } else {
        generate_login_response(Some("Passwords don't match"))
    };
    params.password.zeroize();
    params.password_confirm.zeroize();
    response
}

fn index_not_logged_in(global_vars: &Arc<GlobalVars>) -> HttpResponse {
    if Identity::is_protected().unwrap_or(true) {
        generate_login_response(None)
    } else {
        match Identity::load_identity(None) {
            Ok(identity) => on_identity_loaded(identity, global_vars),
            Err(_) => generate_login_response(None) //assuming no identity
        }
    }
}

async fn handle_index(req: HttpRequest) -> HttpResponse {
    let global_vars = req.app_data::<Data<GlobalVars>>().unwrap();
    if is_authenticated(&req) {
        #[cfg(debug_assertions)]
        let html = fs::read_to_string("src/frontend/index.html").unwrap()
            .replace("AIRA_VERSION", env!("CARGO_PKG_VERSION"));
        #[cfg(not(debug_assertions))]
        let html = include_str!(concat!(env!("OUT_DIR"), "/index.html"));
        let identity = global_vars.session_manager.identity.read().unwrap();
        let identity = identity.as_ref().unwrap();
        HttpResponse::Ok().body(
            html
                .replace("IDENTITY_FINGERPRINT", &crypto::generate_fingerprint(&identity.get_public_key()))
                .replace("WEBSOCKET_PORT", &global_vars.websocket_port.to_string())
                .replace("IS_IDENTITY_PROTECTED", &Identity::is_protected().unwrap().to_string())
                .replace("PSEC_PADDING", &identity.use_padding.to_string())
        )
    } else {
        index_not_logged_in(global_vars)
    }
}

const JS_CONTENT_TYPE: &str = "text/javascript";

#[cfg(debug_assertions)]
fn replace_fields(file_path: &str) -> String {
    use yaml_rust::YamlLoader;
    let mut content = fs::read_to_string(file_path).unwrap();
    let config = &YamlLoader::load_from_str(&fs::read_to_string("config.yml").unwrap()).unwrap()[0];
    let fields = config.as_hash().unwrap();
    fields.into_iter().for_each(|field| {
        content = content.replace(field.0.as_str().unwrap(), field.1.as_str().unwrap());
    });
    content
}

async fn handle_static(req: HttpRequest) -> HttpResponse {
    let splits: Vec<&str> = req.path()[1..].split('/').collect();
    if splits[0] == "static" {
        let mut response_builder = HttpResponse::Ok();
        match splits[1] {
            "index.js" => {
                response_builder.content_type(JS_CONTENT_TYPE);
                #[cfg(debug_assertions)]
                return response_builder.body(fs::read_to_string("src/frontend/index.js").unwrap());
                #[cfg(not(debug_assertions))]
                return response_builder.body(include_str!(concat!(env!("OUT_DIR"), "/index.js")));
            }
            "index.css" => {
                #[cfg(debug_assertions)]
                return response_builder.body(replace_fields("src/frontend/index.css"));
                #[cfg(not(debug_assertions))]
                return response_builder.body(include_str!(concat!(env!("OUT_DIR"), "/index.css")));
            }
            "imgs" => {
                if splits[2] == "icons" && splits.len() <= 5 {
                    let color = if splits.len() == 5 {
                        splits[4]
                    } else {
                        "none"
                    };
                    if let Some(body) = match splits[3] {
                        "logo" => Some(include_str!("frontend/imgs/icons/logo.svg")),
                        "verified" => Some(include_str!("frontend/imgs/icons/verified.svg")),
                        "add_contact" => Some(include_str!("frontend/imgs/icons/add_contact.svg")),
                        "remove_contact" => Some(include_str!("frontend/imgs/icons/remove_contact.svg")),
                        "logout" => Some(include_str!("frontend/imgs/icons/logout.svg")),
                        "warning" => Some(include_str!("frontend/imgs/icons/warning.svg")),
                        "attach" => Some(include_str!("frontend/imgs/icons/attach.svg")),
                        "download" => Some(include_str!("frontend/imgs/icons/download.svg")),
                        "cancel" => Some(include_str!("frontend/imgs/icons/cancel.svg")),
                        "refresh" => Some(include_str!("frontend/imgs/icons/refresh.svg")),
                        "info" => Some(include_str!("frontend/imgs/icons/info.svg")),
                        "delete_conversation" => Some(include_str!("frontend/imgs/icons/delete_conversation.svg")),
                        "profile" => Some(include_str!("frontend/imgs/icons/profile.svg")),
                        _ => None
                    } {
                        response_builder.content_type("image/svg+xml");
                        return response_builder.body(body.replace("FILL_COLOR", color))
                    }
                } else if splits.len() == 3 {
                    match splits[2] {
                        "wallpaper" => return response_builder.content_type("image/jpeg").body(&include_bytes!("frontend/imgs/wallpaper.jpeg")[..]),
                        "frog" => return response_builder.content_type("image/png").body(&include_bytes!("frontend/imgs/frog.png")[..]),
                        _ => {}
                    }
                }
            }
            "fonts" => {
                if splits.len() == 3 {
                    match splits[2] {
                        "TwitterColorEmoji.ttf" => return response_builder.body(&include_bytes!("frontend/fonts/TwitterColorEmoji.ttf")[..]),
                        _ => {}
                    }
                }
            }
            "commons" => {
                if splits.len() == 3 {
                    match splits[2] {
                        "script.js" => {
                            response_builder.content_type(JS_CONTENT_TYPE);
                            #[cfg(debug_assertions)]
                            return response_builder.body(fs::read_to_string("src/frontend/commons/script.js").unwrap());
                            #[cfg(not(debug_assertions))]
                            return response_builder.body(include_str!(concat!(env!("OUT_DIR"), "/commons/script.js")))
                        }
                        "style.css" => {
                            #[cfg(debug_assertions)]
                            return response_builder.body(replace_fields("src/frontend/commons/style.css"));
                            #[cfg(not(debug_assertions))]
                            return response_builder.body(include_str!(concat!(env!("OUT_DIR"), "/commons/style.css")));
                        }
                        _ => {}
                    }
                }
            }
            "libs" => {
                if splits.len() == 3 {
                    if let Some(body) = match splits[2] {
                        "linkify.min.js" => Some(include_str!("frontend/libs/linkify.min.js")),
                        "linkify-element.min.js" => Some(include_str!("frontend/libs/linkify-element.min.js")),
                        _ => None
                    } {
                        return response_builder.content_type(JS_CONTENT_TYPE).body(body);
                    }
                }
            }
            _ => {}
        }
    }
    HttpResponse::NotFound().finish()
}

async fn start_http_server(global_vars: GlobalVars) -> io::Result<()> {
    let http_addr = env::var("AIRA_HTTP_ADDR").unwrap_or_else(|_| "127.0.0.1".to_owned()).parse().expect("AIRA_HTTP_ADDR invalid");
    let http_port = match env::var("AIRA_HTTP_PORT") {
        Ok(port) => port.parse().expect("AIRA_HTTP_PORT invalid"),
        Err(_) => constants::UI_PORT
    };
    let server = HttpServer::new(move || {
        App::new()
            .app_data(Data::new(global_vars.clone()))
            .service(web::resource("/")
                .route(web::get().to(handle_index))
                .route(web::post().to(handle_create))
            )
            .route("/login", web::post().to(handle_login))
            .route("/send_file", web::post().to(handle_send_file))
            .route("/send_large_file", web::post().to(handle_send_file))
            .route("/load_file", web::get().to(handle_load_file))
            .route("/set_avatar", web::post().to(handle_set_avatar))
            .route("/avatar/{_}*", web::get().to(handle_avatar))
            .route("/static/{_}*", web::get().to(handle_static))
            .route("/logout", web::get().to(handle_logout))
        }
    ).bind(SocketAddr::new(http_addr, http_port))?;
    let url = format!("http://127.0.0.1:{}", http_port);
    println!("AIRA started on: {}", url);
    if webbrowser::open(&url).is_err() {
        println!("Failed to open browser. Please open the link manually.");
    }
    server.run().await
}

#[derive(Clone)]
struct GlobalVars {
    session_manager: Arc<SessionManager>,
    websocket_port: u16,
    ui_auth_token: Arc<RwLock<Option<String>>>,
    tokio_handle: Handle,
}

#[tokio::main]
async fn main() {
    if let Err(e) = fs::create_dir(AppDirs::new(Some(constants::APPLICATION_FOLDER), false).unwrap().data_dir) {
        if e.kind() != io::ErrorKind::AlreadyExists {
            print_error!(e);
        }
    }
    let ui_auth_token = Arc::new(RwLock::new(None));
    let session_manager = Arc::new(SessionManager::new());
    let websocket_port = start_websocket_server(ui_auth_token.clone(), session_manager.clone()).await;
    start_http_server(GlobalVars {
        session_manager,
        websocket_port,
        ui_auth_token,
        tokio_handle: Handle::current(),
    }).await.unwrap();
}