use anyhow::*;
use log::LevelFilter;
use kochab::{
    Document,
    Request,
    Response,
    Server,
    user_management::{
        user::RegisteredUser,
        UserManagementRoutes,
    },
};

#[tokio::main]
/// An ultra-simple demonstration of authentication.
///
/// The user should be able to set a secret string that only they can see.  They should be
/// able to change this at any time to any thing.  Both the string and the user account
/// will persist across restarts.
///
/// This method sets up and starts the server
async fn main() -> Result<()> {
    // Turn on logging
    env_logger::builder()
        .filter_module("kochab", LevelFilter::Debug)
        .init();

    Server::new()

        // Add our main routes
        .add_authenticated_route("/", handle_main)
        .add_authenticated_input_route("/update", "Enter your new string:", handle_update)

        // Add routes for handling user authentication
        .add_um_routes::<String>()

        // Start the server
        .serve_ip("localhost:1965")
        .await
}

/// The landing page
///
/// Displays the user's current secret string, or prompts the user to sign in if they
/// haven't.  Includes links to update your string (`/update`) or your account
/// (`/account`).  Even though we haven't added an explicit handler for `/account`, this
/// route is managed by kochab.
///
/// Because this route is registered as an authenticated route, any connections without a
/// certificate will be prompted to add a certificate and register.
async fn handle_main(_req: Request, user: RegisteredUser<String>) -> Result<Response> {
    // If the user is signed in, render and return their page
    let response = Document::new()
        .add_text("Your personal secret string:")
        .add_text(user.as_ref())
        .add_blank_line()
        .add_link("/update", "Change your string")
        .add_link("/account", "Update your account")
        .into();
    Ok(response)
}

/// The update endpoint
///
/// Users can update their secret string here.
async fn handle_update(_request: Request, mut user: RegisteredUser<String>, input: String) -> Result<Response> {

    // The user has already been prompted to log in if they weren't and asked to give an
    // input string, so all we need to do is...

    // Update the users data
    *user.as_mut() = input;

    // Render a response
    let response = Document::new()
        .add_text("String updated!")
        .add_blank_line()
        .add_link("/", "Back")
        .into();
    Ok(response)

}