use std::collections::HashMap;

use actix_web::{web, App, HttpResponse, HttpServer, Result};
use askama::Template;

#[derive(Template)]
#[template(path = "user.html")]
struct UserTemplate<'a> {
    name: &'a str,
    text: &'a str,
}

#[derive(Template)]
#[template(path = "index.html")]
struct Index;

fn index(query: web::Query<HashMap<String, String>>) -> Result<HttpResponse> {
    let s = if let Some(name) = query.get("name") {
        UserTemplate {
            name: name,
            text: "Welcome!",
        }
        .render()
        .unwrap()
    } else {
        Index.render().unwrap()
    };
    Ok(HttpResponse::Ok().content_type("text/html").body(s))
}

fn main() -> std::io::Result<()> {
    // start http server
    HttpServer::new(move || {
        App::new().service(web::resource("/").route(web::get()).to(index))
    })
    .bind("127.0.0.1:8080")?
    .run()
}