#[macro_use]
extern crate rocket;
use libsig;
use rocket::response::content::{Css, Html};
use rocket::serde::json::Json;
use rocket::State;
use serde::{Deserialize, Serialize};
use serde_json::{json, Value};
mod templates;

struct BaseUrl {
    url: String,
}

#[get("/api")]
fn api_version_available() -> Json<Value> {
    Json(json! ({
        "versions": [ "v1" ]
    }))
}

#[get("/api/v1")]
fn api_v1_index() -> Json<Value> {
    Json(json! ({
        "endpoints": [ "generate", "generate_ambient" ]
    }))
}

#[derive(Debug, Serialize, Deserialize)]
struct Output {
    data: libsig::SongIdea,
    text: String,
}

#[get("/api/v1/generate")]
fn api_v1_generate() -> Json<Output> {
    let idea = libsig::SongIdea::generate();
    Json(Output {
        data: idea.clone(),
        text: idea.to_string(),
    })
}

#[get("/api/v1/generate_ambient")]
fn api_v1_generate_ambient() -> Json<Output> {
    let idea = libsig::SongIdea::generate_ambient();
    Json(Output {
        data: idea.clone(),
        text: idea.to_string(),
    })
}

#[get("/")]
fn index(base: &State<BaseUrl>) -> Html<String> {
    Html(templates::main_page_template(None, &base.url))
}

#[get("/generate")]
fn generate(base: &State<BaseUrl>) -> Html<String> {
    Html(templates::main_page_template(Some(
        libsig::SongIdea::generate(),
    ), &base.url))
}

#[get("/generate_ambient")]
fn generate_ambient(base: &State<BaseUrl>) -> Html<String> {
    Html(templates::main_page_template(Some(
        libsig::SongIdea::generate_ambient(),
    ), &base.url))
}

#[get("/style.css")]
async fn style_css() -> Css<String> {
    Css(include_str!("../static/style.css").into())
}

#[launch]
fn rocket() -> _ {
    rocket::build()
        .manage(BaseUrl {
            url: std::env::var("SIGWEB_BASE_URL").unwrap_or("/".to_string()),
        })
        .mount(
            "/",
            routes![
                api_version_available,
                api_v1_index,
                api_v1_generate,
                api_v1_generate_ambient,
                generate,
                generate_ambient,
                index,
                style_css,
            ],
        )
}