//! # Rust Letter Backend
//!
//! `rust_letter_be` handles the backend execution using Rocket.

#[macro_use]
extern crate rocket;

/// A module that handles the backend for the site.
pub mod web_app_backend {

    use rocket::fs::FileServer;
    use rocket::http::{Cookie, CookieJar};
    use rocket::response::Redirect;
    use rocket::{Build, Rocket};
    use rocket_dyn_templates::{context, Template};
    use void_fe::void_app::{self, DarkModeProps, PoemRequest, VirtualDom};

    #[get("/")]
    async fn index(cookies: &CookieJar<'_>) -> Template {
        let dark_mode = match cookies.get("dark-mode") {
            Some(c) => {
                if c.value() == "true" {
                    true
                } else if c.value() == "false" {
                    false
                } else {
                    false
                }
            }
            None => false,
        };
        let mut vdom = VirtualDom::new_with_props(
            void_app::HomePage,
            DarkModeProps {
                slug: Some("/".to_string()),
                dark_mode,
            },
        );
        let _ = vdom.rebuild();
        let output = dioxus_ssr::render(&vdom);
        Template::render(
            "index",
            context! {
                app_title: "A Letter to the Void",
                style_include: "<link href=/styles/tailwind.min.css rel=stylesheet />",
                test: &output,
                dark_mode: match dark_mode {
                    true => "dark",
                    false => ""
                },
            },
        )
    }

    #[get("/?dark_mode&<callback>")]
    async fn dark_mode(cookies: &CookieJar<'_>, callback: &str) -> Redirect {
        match cookies.get("dark-mode") {
            Some(_) => cookies.remove(Cookie::named("dark-mode")),
            None => cookies.add(Cookie::new("dark-mode", "true")),
        };
        let callback_uri = format!("{callback}");
        Redirect::to(callback_uri)
    }

    #[get("/")]
    async fn poem_list(cookies: &CookieJar<'_>) -> Template {
        let dark_mode = match cookies.get("dark-mode") {
            Some(c) => {
                if c.value() == "true" {
                    true
                } else if c.value() == "false" {
                    false
                } else {
                    false
                }
            }
            None => false,
        };
        let mut vdom = VirtualDom::new_with_props(
            void_app::PoemListPage,
            DarkModeProps {
                slug: Some(String::from("/poems")),
                dark_mode,
            },
        );
        let _ = vdom.rebuild();
        let output = dioxus_ssr::render(&vdom);
        Template::render(
            "index",
            context! {
                app_title: "A Letter to the Void",
                style_include: "<link href=/styles/tailwind.min.css rel=stylesheet />",
                test: &output,
                dark_mode: match dark_mode {
                    true => "dark",
                    false => ""
                },
            },
        )
    }

    #[get("/<entry>")]
    async fn poem(cookies: &CookieJar<'_>, entry: &str) -> Template {
        let dark_mode = match cookies.get("dark-mode") {
            Some(c) => {
                if c.value() == "true" {
                    true
                } else if c.value() == "false" {
                    false
                } else {
                    false
                }
            }
            None => false,
        };
        let mut vdom = VirtualDom::new_with_props(
            void_app::PoemPage,
            PoemRequest {
                slug: format!("{entry}"),
                dark_mode: Some(dark_mode),
            },
        );
        let _ = vdom.rebuild();
        let output = dioxus_ssr::render(&vdom);
        Template::render(
            "index",
            context! {
                app_title: "A Letter to the Void",
                style_include: "<link href=/styles/tailwind.min.css rel=stylesheet />",
                test: &output,
                dark_mode: match dark_mode {
                    true => "dark",
                    false => ""
                },
            },
        )
    }

    /// This runs `rocket::build()` with the needed mounts and routes.
    pub async fn build_rocket() -> Rocket<Build> {
        rocket::build()
            .mount("/images", FileServer::from("public/images"))
            .mount("/styles", FileServer::from("public/styles"))
            .mount("/fonts", FileServer::from("public/fonts"))
            .mount("/poems", routes![poem_list, poem])
            .mount("/", routes![dark_mode, index])
            .attach(Template::fairing())
    }
}