//! # Rust Letter Frontend
//!
//! Rendering functions for the site using [Dioxus](https://dioxuslabs.com/).

#![allow(non_snake_case)]

/// A module that handles the functions needed
/// to render the site.
pub mod void_app {
    // import the prelude to get access to the `rsx!` macro and the `Scope` and `Element` types
    pub use dioxus::prelude::*;
    use markdown::{self, Options};
    use rust_embed::RustEmbed;

    #[cfg(any(target_family = "wasm"))]
    use dioxus_helmet::Helmet;
    #[cfg(any(target_family = "wasm"))]
    use dioxus_router::{Link, Redirect, Route, Router};

    #[derive(PartialEq, Props)]
    pub struct PoemRequest {
        pub slug: String,
        pub dark_mode: Option<bool>,
    }

    #[derive(PartialEq, Props)]
    pub struct HomeProps {
        pub dark_mode: bool,
    }

    #[derive(PartialEq, Props)]
    struct PoemData {
        title: Option<String>,
        content: Option<String>,
        creation_date: Option<String>,
        slug: Option<String>,
        dark_mode: Option<bool>,
    }

    #[derive(RustEmbed)]
    #[folder = "data/poems"]
    pub struct Poems;

    #[cfg(target_family = "wasm")]
    pub fn DioxusApp(cx: Scope) -> Element {
        use dioxus_router::Redirect;

        let poem_list = get_poem_list();
        cx.render(rsx! {
            Router {
                Route { to: "/", HomePage {} }
                Route { to: "/poem/:slug/", PoemPage {} }
                Route { to: "", PageNotFound {} }
            }
        })
    }

    #[cfg(target_family = "wasm")]
    fn PageNotFound(cx: Scope) -> Element {
        cx.render(rsx! {
            p { "That page doesn't exist, sorry!" }
            Redirect { to: "/" }
        })
    }

    /// Renders the app and returns the rendered Element.
    pub fn HomePage(cx: Scope<HomeProps>) -> Element {
        let dark_mode = cx.props.dark_mode.clone();
        cx.render(rsx!{
            div { class: "min-h-screen font-nerd bg-alice-werefox-grey-light dark:bg-alice-werefox-grey",
                div { class: "container space-y-4 mx-auto p-4",
                    div { class: "p-4 ring-4 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light",
                        p { class: "flex flex-row mx-auto max-w-full justify-center text-lg text-center",
                            "A Letter to the Void&nbsp;"
                            a { class: "max-h-sm",
                                href: "?set-dark-mode",
                                match dark_mode {
                                    true => {
                                        rsx! {
                                            img { class: "",
                                                src: "/images/white_square_button.png",
                                                alt: "A white square button that can toggle dark mode.",
                                            }
                                        }
                                    },
                                    false => {
                                        rsx! {
                                            img { class: "",
                                                src: "/images/black_square_button.png",
                                                alt: "A black square button that can toggle dark mode.",
                                            }
                                        }
                                    },
                                }
                            }
                        }
                    }
                    PoemList {}
                    div { class: "p-4 ring-4 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light",
                        "This site uses Mutant Standard emoji, which are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License"
                    }
                }
            }
        })
    }

    fn get_poem_list() -> Vec<(String, String)> {
        let mut poem_list = Vec::new();
        for p in Poems::iter() {
            let filename = p.to_string();
            let poem_content = Poems::get(&filename).expect("Found poem {filename:?}");
            let mut poem_to_str = std::str::from_utf8(poem_content.data.as_ref())
                .expect("Title is valid UT8.")
                .lines();
            let title_markdown = poem_to_str.next().expect("No title specified.");
            let title = markdown::to_html_with_options(title_markdown, &Options::gfm()).unwrap();
            let slug = String::from(filename.trim_end_matches(".md"));
            poem_list.push((title.clone(), slug.clone()));
        }
        log::trace!("{poem_list:?}");
        poem_list
    }

    fn PoemList(cx: Scope) -> Element {
        let poem_list = get_poem_list();
        cx.render(rsx! {
            ul { class: "space-y-4",
                poem_list.into_iter().map(|p| {
                    rsx!{
                        div { PoemButton { title: p.0, slug: p.1 } }
                    }
                })
            }
        })
    }

    #[cfg(any(target_family = "unix", target_family = "windows"))]
    pub fn PoemPage(cx: Scope<PoemRequest>) -> Element {
        let slug = String::from(cx.props.slug.clone());
        let dark_mode = cx.props.dark_mode.clone().expect("Dark mode prop not passed.");
        cx.render(rsx!{
            div { class: "min-h-screen font-nerd bg-alice-werefox-grey-light dark:bg-alice-werefox-grey",
                div { class: "container space-y-4 mx-auto p-4",
                    a { href: "/",
                        div { class: "p-4 ring-4 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light hover:text-alice-werefox-blue-dark dark:hover:text-alice-werefox-blue-light hover:ring-alice-werefox-blue dark:hover:ring-alice-werefox-blue hover:animate-yip transition",
                            p { class: "text-lg text-center",
                                "Take me back!"
                            }
                        }
                    }
                    GetPoem { slug: slug, dark_mode: dark_mode } 
                }
            }
        })
    }

    #[cfg(target_family = "wasm")]
    fn PoemPage(cx: Scope) -> Element {
        let slug = String::from(
            dioxus_router::use_route(cx)
                .segment("slug")
                .expect("No slug specified."),
        );
        let dark_mode = cx.props.dark_mode.clone().expect("Dark mode prop not passed.");
        cx.render(rsx!{
            div { class: "min-h-screen font-nerd bg-alice-werefox-grey-light dark:bg-alice-werefox-grey",
                div { class: "container space-y-4 mx-auto p-4",
                    Link { to: "/"
                        div { class: "p-4 ring-4 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light hover:text-alice-werefox-blue-dark dark:hover:text-alice-werefox-blue-light hover:ring-alice-werefox-blue dark:hover:ring-alice-werefox-blue hover:animate-yip transition",
                            p { class: "text-lg text-center",
                                "Take me back!"
                            }
                        }
                    }
                    GetPoem { slug: slug, dark_mode: dark_mode }
                }
            }
        })
    }

    #[cfg(any(target_family = "unix", target_family = "windows"))]
    fn PoemButton(cx: Scope<PoemData>) -> Element {
        let title = cx.props.title.clone().expect("No title specified.");
        let slug = cx.props.slug.clone().expect("No slug specified.");
        let slug_ref = slug.as_str();
        cx.render(rsx!{
            a { href: "/poem/{slug_ref}",
                li { class: "p-4 ml-6 mr-6 ring-2 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light hover:text-alice-werefox-blue-dark dark:hover:text-alice-werefox-blue-light hover:ring-alice-werefox-blue dark:hover:ring-alice-werefox-blue hover:animate-yip transition",
                    div { class: "text-lg text-center", "{title}" }
                }
            }
        })
    }

    #[cfg(target_family = "wasm")]
    fn PoemButton(cx: Scope<PoemData>) -> Element {
        let title = cx.props.title.clone().expect("No title specified.");
        let slug = cx.props.slug.clone().expect("No slug specified.");
        let slug_ref = slug.as_str();
        cx.render(rsx!{
            Link { to: "/poem/{slug_ref}",
                li { class: "p-4 ml-6 mr-6 ring-2 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light hover:text-alice-werefox-blue-dark dark:hover:text-alice-werefox-blue-light hover:ring-alice-werefox-blue dark:hover:ring-alice-werefox-blue hover:animate-yip transition",
                    div { class: "mx-auto max-w-fit flex justify-center text-lg text-center", 
                        dangerous_inner_html: "{title}" 
                    }
                }
            }
        })
    }

    fn GetPoem(cx: Scope<PoemData>) -> Element {
        let dark_mode = cx.props.dark_mode.clone().expect("Dark mode prop not passed.");
        let slug = String::from(cx.props.slug.clone().expect("No slug specified."));
        let filename =
            String::from(String::from(slug.clone()) + ".md");
        let creation_date =
            String::from(String::from("<br>Written on: ") + filename.split("_").next().unwrap());
        let poem_content = Poems::get(&filename).expect("Found poem {filename:?}");
        let mut poem_to_str = std::str::from_utf8(poem_content.data.as_ref())
            .expect("Title is valid UT8.")
            .lines();
        let poem_title = poem_to_str.next().unwrap();
        let poem_content = poem_to_str.into_iter().collect::<Vec<&str>>().join("\n");
        let poem_title_to_html_string =
            markdown::to_html_with_options(poem_title, &Options::gfm()).unwrap();
        let poem_content_to_html_string =
            markdown::to_html_with_options(poem_content.as_str(), &Options::gfm()).unwrap();
        cx.render(rsx!{
            MakePoem{ title: poem_title_to_html_string, content: poem_content_to_html_string, creation_date: creation_date, slug: slug, dark_mode: dark_mode } }
        )
    }

    #[cfg(any(target_family = "unix", target_family = "windows"))]
    fn RenderPoemTitle(cx: Scope<PoemData>) -> Element {
        let slug = cx.props.slug.clone().expect("Slug prop was not passed.");
        let dark_mode = cx.props.dark_mode.clone().expect("Dark mode prop not passed.");
        let title = cx.props.title.clone().expect("No title specified.");
        cx.render(rsx!{
            span { class: "mx-auto max-w-fit flex justify-center bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark border-4 border-alice-werefox-red-dark dark:border-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light p-4",
                "{title}&nbsp;"
                a { class: "max-h-sm",
                    href: "/poem/{slug}?set-dark-mode",
                    match dark_mode {
                        true => {
                            rsx! {
                                img { class: "",
                                    src: "/images/white_square_button.png",
                                    alt: "A white square button that can toggle dark mode.",
                                }
                            }
                        },
                        false => {
                            rsx! {
                                img { class: "",
                                    src: "/images/black_square_button.png",
                                    alt: "A black square button that can toggle dark mode.",
                                }
                            }
                        },
                    }
                } 
            }
        })
    }

    #[cfg(target_family = "wasm")]
    fn RenderPoemTitle(cx: Scope<PoemData>) -> Element {
        let slug = cx.props.slug.clone().expect("Slug prop was not passed.");
        let dark_mode = cx.props.dark_mode.clone().expect("Dark mode prop not passed.");
        let title = cx
            .props
            .title
            .clone()
            .expect("This poem has an empty title.");
        cx.render(rsx!{
            p { class: "mx-auto max-w-fit flex flex-row justify-center bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark border-4 border-alice-werefox-red-dark dark:border-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light p-4",
                dangerous_inner_html: "{title}&nbsp;",
                a { class: "max-h-sm",
                    href: "/poem/{slug}?set-dark-mode",
                    match dark_mode {
                        true => {
                            rsx! {
                                img { class: "",
                                    src: "/images/white_square_button.png",
                                    alt: "A white square button that can toggle dark mode.",
                                }
                            }
                        },
                        false => {
                            rsx! {
                                img { class: "",
                                    src: "/images/black_square_button.png",
                                    alt: "A black square button that can toggle dark mode.",
                                }
                            }
                        },
                    }
                } 
            }
        })
    }

    #[cfg(any(target_family = "unix", target_family = "windows"))]
    fn RenderPoemElement(cx: Scope<PoemData>) -> Element {
        let content = cx.props.content.clone().expect("No content specified.");
        let creation_date = cx
            .props
            .creation_date
            .clone()
            .expect("No creation date specified.");
        cx.render(rsx! {
            div { class: "font-nerd flex flex-col space-y-4 mx-4 py-4", "{content}{creation_date} "
            }
        })
    }

    #[cfg(target_family = "wasm")]
    fn RenderPoemElement(cx: Scope<PoemData>) -> Element {
        let content = cx.props.content.clone().expect("No content specified.");
        let creation_date = cx
            .props
            .creation_date
            .clone()
            .expect("No creation date specified.");
        cx.render(rsx! {
            div {
                class: "font-nerd flex flex-col space-y-4 mx-4 py-4",
                dangerous_inner_html: "{content}{creation_date}"
            }
        })
    }

    fn MakePoem(cx: Scope<PoemData>) -> Element {
        let slug = String::from(cx.props.slug.clone().expect("Slug prop was not passed."));
        let dark_mode = cx.props.dark_mode.clone().expect("Dark mode prop not passed.");
        let title = cx.props.title.clone().expect("No title specified.");
        let creation_date = cx
            .props
            .creation_date
            .clone()
            .expect("No creation date specified.");
        let content = cx.props.content.clone().expect("No content specified.");
        cx.render(rsx!{
            div { class: "flex-col space-y-4",
                RenderPoemTitle { title: title.clone(), slug: slug, dark_mode: dark_mode }
                details { class: "group mx-auto max-w-fit space-y-4 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark border-4 border-alice-werefox-red-dark dark:border-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light p-4",
                    summary { class: "group-open:before:content-['Close'] before:content-['Open'] flex justify-center p-4 ring-4 bg-alice-werefox-grey-lightest dark:bg-alice-werefox-grey-dark ring-alice-werefox-red-dark dark:ring-alice-werefox-red text-alice-werefox-red-dark dark:text-alice-werefox-red-light hover:text-alice-werefox-blue-dark dark:hover:text-alice-werefox-blue-light hover:ring-alice-werefox-blue dark:hover:ring-alice-werefox-blue hover:animate-yip transition",
                    }
                    RenderPoemElement { content: content.clone(), creation_date: creation_date.clone() }
                }
            }
        })
    }
}