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use derive_more::Display;
use yew::prelude::*;

#[derive(Clone, Debug, Properties, PartialEq)]
pub struct HeroProps {
    /// Extra classes for the hero container.
    #[prop_or_default]
    pub classes: Classes,
    /// The contents of the hero-head section.
    #[prop_or_default]
    pub head: Option<Html>,
    /// Optional classes to add to the hero-head container.
    #[prop_or_default]
    pub head_classes: Classes,
    /// The contents of the hero-body section.
    pub body: Html,
    /// Optional classes to add to the hero-body container.
    #[prop_or_default]
    pub body_classes: Classes,
    /// The contents of the hero-foot section.
    #[prop_or_default]
    pub foot: Option<Html>,
    /// Optional classes to add to the hero-foot container.
    #[prop_or_default]
    pub foot_classes: Classes,
    /// If you are using a [fixed navbar](https://bulma.io/documentation/components/navbar/#fixed-navbar),
    /// you can use the `fixed_nav=true` modifier on the hero for it to occupy the viewport height minus
    /// the navbar height.
    ///
    /// https://bulma.io/documentation/layout/hero/#fullheight-with-navbar
    #[prop_or_default]
    pub fixed_nav: bool,
    /// Generate a subtle gradient for the hero.
    #[prop_or_default]
    pub bold: bool,
    /// The size for this hero.
    #[prop_or_default]
    pub size: Option<HeroSize>,
}

/// An imposing hero banner to showcase something.
///
/// [https://bulma.io/documentation/layout/hero/](https://bulma.io/documentation/layout/hero/)
#[function_component(Hero)]
pub fn hero(props: &HeroProps) -> Html {
    let class = classes!(
        "hero",
        props.classes.clone(),
        props.fixed_nav.then_some("is-fullheight-with-navbar"),
        props.bold.then_some("is-bold"),
        props.size.as_ref().map(|size| size.to_string()),
    );

    // Build the header section.
    let head = if let Some(head) = &props.head {
        let class = classes!("hero-head", props.head_classes.clone());
        html! {<div {class}>{head.clone()}</div>}
    } else {
        html! {}
    };
    // Build the footer section.
    let foot = if let Some(foot) = &props.foot {
        let class = classes!("hero-foot", props.foot_classes.clone());
        html! {<div {class}>{foot.clone()}</div>}
    } else {
        html! {}
    };

    let body_classes = classes!("hero-body", props.body_classes.clone());
    html! {
        <section {class}>
            {head}
            <div class={body_classes}>{props.body.clone()}</div>
            {foot}
        </section>
    }
}

/// The 4 sizes available for heroes.
///
/// [https://bulma.io/documentation/layout/hero/#sizes](https://bulma.io/documentation/layout/hero/#sizes)
#[derive(Clone, Debug, Display, PartialEq, Eq)]
#[display(fmt = "is-{}")]
pub enum HeroSize {
    #[display(fmt = "medium")]
    Medium,
    #[display(fmt = "large")]
    Large,
    #[display(fmt = "fullheight")]
    Fullheight,
    #[display(fmt = "fullheight-with-navbar")]
    FullheightWithNavbar,
}