use axum::{
    extract::{Path, State},
    http::{header, StatusCode},
    response::IntoResponse,
    routing::get,
    Router,
};
use maud::Markup;

use super::templates;
use crate::{
    app::App,
    error::InternalError,
    repo::{channel, login::Login},
};

async fn index(State(app): State<App>, login: Option<Login>) -> Result<Markup, InternalError> {
    match login {
        None => Ok(templates::unauthenticated()),
        Some(login) => index_authenticated(app, login).await,
    }
}

async fn index_authenticated(app: App, login: Login) -> Result<Markup, InternalError> {
    let channels = app.channels().all().await?;

    Ok(templates::authenticated(login, &channels))
}

#[derive(rust_embed::Embed)]
#[folder = "js"]
struct Js;

async fn js(Path(path): Path<String>) -> impl IntoResponse {
    let mime = mime_guess::from_path(&path).first_or_octet_stream();

    match Js::get(&path) {
        Some(file) => (
            StatusCode::OK,
            [(header::CONTENT_TYPE, mime.as_ref())],
            file.data,
        )
            .into_response(),
        None => (StatusCode::NOT_FOUND, "").into_response(),
    }
}

async fn channel(
    State(app): State<App>,
    _: Login,
    Path(channel): Path<channel::Id>,
) -> Result<Markup, InternalError> {
    let channel = app.index().channel(channel).await?;
    Ok(templates::channel(&channel))
}

pub fn router() -> Router<App> {
    Router::new()
        .route("/", get(index))
        .route("/js/*path", get(js))
        .route("/:channel", get(channel))
}