mod api;
mod data_mgt;
mod logs;
use actix_files::NamedFile;

use actix_web::{
    App, HttpRequest, HttpServer, get, route,
    web::{self},
};

use serde_json::Value;
use std::{env, fs, path::PathBuf, sync::LazyLock};

pub static HTML_DIR: &str = "data/html/";
pub static LOG_DIR: &str = "data/logs/";
pub static LOG_FILE_NAME: &str = "log.txt";
pub static MIN_ASSET_DURATION: u32 = 1; // in minutes
pub static MAX_ASSET_DURATION: u32 = 60; // in minutes
pub static MAX_ASSETS: usize = 1000;
pub static MAX_ASSET_SIZE_BYTES: usize = 3 * 1024 * 1024; // 3 MB
pub static MAX_UPLOADS_PER_USER: usize = 10;

pub static BIND_ADDR: LazyLock<String> = LazyLock::new(|| match env::var("BIND_ADDR") {
    Ok(addr) => {
        println!("Binding to address: {}", addr);
        addr.parse().unwrap_or("127.0.0.1".to_string())
    }
    Err(_) => {
        println!("Binding to default address: 0.0.0.0");
        "0.0.0.0".to_string()
    }
});
pub static BIND_PORT: LazyLock<u16> = LazyLock::new(|| match env::var("BIND_PORT") {
    Ok(port_str) => {
        println!("Binding to port: {}", port_str);
        port_str.parse().unwrap_or(8080)
    }
    Err(_) => {
        println!("Binding to default port: 8080");
        8080
    }
});

pub static STATIC_PAGES: LazyLock<Vec<String>> = LazyLock::new(|| {
    fs::read_dir(HTML_DIR)
        .unwrap()
        .filter_map(|entry| entry.ok().and_then(|e| e.file_name().to_str().map(|s| s.to_string())))
        .collect()
});

use crate::{
    api::{api_get_asset, api_stats, api_upload},
    logs::{LogEventType, log_event},
};

#[get("/")]
async fn index(req: HttpRequest) -> actix_web::Result<NamedFile> {
    let path: PathBuf = PathBuf::from(HTML_DIR.to_string() + "index.html");
    log_event(LogEventType::HttpRequest(req.into()));
    Ok(NamedFile::open(path)?)
}

#[get("/stats")]
async fn stats(req: HttpRequest) -> actix_web::Result<NamedFile> {
    let path: PathBuf = PathBuf::from(HTML_DIR.to_string() + "stats.html");
    log_event(LogEventType::HttpRequest(req.into()));
    Ok(NamedFile::open(path)?)
}

#[get("/bhs/{id}")]
async fn view_asset(req: HttpRequest) -> actix_web::Result<NamedFile> {
    let path: PathBuf = PathBuf::from(HTML_DIR.to_string() + "view.html");
    log_event(LogEventType::HttpRequest(req.into()));
    Ok(NamedFile::open(path)?)
}

#[route("/{tail:.*}", method = "GET", method = "POST")]
async fn catch_all(req: HttpRequest, _payload: Option<web::Json<Value>>) -> actix_web::Result<NamedFile> {
    println!("Catch-all route triggered for path: {}", req.uri().path());
    let response = match req.uri().path() {
        path if STATIC_PAGES.contains(&path[1..].into()) => {
            let file_path = HTML_DIR.to_string() + path;
            Ok(NamedFile::open(file_path)?)
        }
        _ => {
            let file_path = PathBuf::from(HTML_DIR.to_string() + "error.html");
            Ok(NamedFile::open(file_path)?)
        }
    };

    log_event(LogEventType::HttpRequest(req.into()));
    response
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    let _ = fs::create_dir_all(LOG_DIR);
    let log_filename = format!("{}{}", LOG_DIR, LOG_FILE_NAME);
    let log_filename_path = std::path::Path::new(&log_filename);

    let time_tag = chrono::Local::now().format("%Y_%m_%d_%H_%M_%S");
    if log_filename_path.exists() {
        println!("File: {}, exists, rotating.", &log_filename_path.display());
        fs::rename(
            &log_filename_path,
            format!("{}{}_{}", LOG_DIR, time_tag, &LOG_FILE_NAME),
        )
        .unwrap_or_else(|e| {
            println!(
                "No existing log file {} to rotate. Error: {}",
                log_filename_path.to_string_lossy(),
                e
            )
        });
        println!("Rotated log file to: {}_{}", time_tag, &LOG_FILE_NAME);
    }
    let app_state = data_mgt::AppState::default();

    println!("Starting server at http://{}:{}/", *BIND_ADDR, *BIND_PORT);

    let inner_appt_state = app_state.clone();
    tokio::spawn(async move {
        let mut interval = tokio::time::interval(tokio::time::Duration::from_secs(1));
        loop {
            interval.tick().await;
            if let Err(e) = data_mgt::clear_app_data(&inner_appt_state).await {
                eprintln!("Error clearing assets: {}", e);
            }
        }
    });
    HttpServer::new(move || {
        App::new()
            .app_data(web::JsonConfig::default().limit(1024 * 1024 * 3)) // 3MB limit
            .app_data(web::Data::new(app_state.clone()))
            .service(index)
            .service(stats)
            .service(view_asset)
            .service(api_get_asset)
            .service(api_upload)
            .service(api_stats)
            .service(catch_all)
    })
    .bind((BIND_ADDR.clone(), *BIND_PORT))?
    .run()
    .await
}