ev_lib 0.17.1

use dioxus::prelude::*;

use crate::{
	cn,
	uikit::{Accent, BUTTON_BASE, ButtonVariant, Size, button_accent_class, button_size_class},
};

/// Fuses the base, variant, size and accent classes with a caller override, last
/// wins. Mirrors the TS `buttonVariants` helper so consumers (e.g. pagination)
/// can reuse the same canonical class string without rendering a `Button`.
///
/// The accent fuses after the variant so it recolours whatever the variant set.
pub fn button_classes(variant: &ButtonVariant, size: Size, icon: bool, accent: Option<Accent>, class: &str) -> String {
	cn!(
		BUTTON_BASE,
		variant.as_class(),
		button_size_class(size, icon),
		accent.map_or("", |a| button_accent_class(a, variant)),
		class
	)
}
/// With `href` this is an `<a>` wearing the button's classes — a link that looks
/// like a call to action is still a link, and the kit has no `asChild` slot to
/// express that otherwise.
#[component]
pub fn Button(
	#[props(default)] variant: ButtonVariant,
	#[props(default)] size: Size,
	#[props(default)] icon: bool,
	/// Recolours the button at an [`Accent`] rung; unset is the normal case.
	accent: Option<Accent>,
	#[props(default)] class: String,
	#[props(default)] disabled: bool,
	href: Option<String>,
	/// Left unset the HTML default applies (`submit` inside a `Form`), mirroring
	/// the TS port where `type` is just another forwarded button prop. Callers
	/// that must not submit — addons, toolbars — pass `"button"`.
	r#type: Option<String>,
	onclick: Option<EventHandler<MouseEvent>>,
	children: Element,
) -> Element {
	let cls = button_classes(&variant, size, icon, accent, &class);
	if let Some(href) = href {
		return rsx! {
			a {
				class: cls,
				"data-slot": "button",
				href,
				onclick: move |e| { if let Some(h) = onclick { h.call(e); } },
				{children}
			}
		};
	}
	rsx! {
		button {
			class: cls,
			"data-slot": "button",
			r#type,
			disabled,
			onclick: move |e| { if let Some(h) = onclick { h.call(e); } },
			{children}
		}
	}
}

#[cfg(test)]
mod tests {
	use super::*;
	use crate::uikit::test_util::render;

	#[test]
	fn default_variant_and_size_render() {
		fn app() -> Element {
			rsx! { Button { "go" } }
		}
		let html = render(app);
		assert!(html.contains("bg-primary"), "{html}");
		assert!(html.contains("h-9"), "{html}");
		assert!(html.contains("go"));
		assert!(html.contains("data-slot=\"button\""));
	}

	#[test]
	fn icon_sm_size_is_canon_only_here() {
		fn app() -> Element {
			rsx! {
				Button { size: Size::Sm, icon: true, "x" }
			}
		}
		let html = render(app);
		assert!(html.contains("h-8 aspect-square"), "{html}");
	}

	#[test]
	fn icon_lg_drops_text_padding() {
		fn app() -> Element {
			rsx! {
				Button { size: Size::Lg, icon: true, "x" }
			}
		}
		let html = render(app);
		assert!(html.contains("h-10 aspect-square"), "{html}");
		assert!(!html.contains("px-6"), "icon button must not carry text padding: {html}");
	}

	#[test]
	fn type_is_absent_unless_asked_for() {
		fn app() -> Element {
			rsx! { Button { "go" } }
		}
		let html = render(app);
		assert!(!html.contains("type="), "bare Button mirrors TS and emits no type: {html}");
	}

	#[test]
	fn type_prop_reaches_the_element() {
		fn app() -> Element {
			rsx! {
				Button { r#type: "button", "go" }
			}
		}
		let html = render(app);
		assert!(html.contains("type=\"button\""), "{html}");
	}

	#[test]
	fn accent_recolours_per_variant() {
		fn filled() -> Element {
			rsx! {
				Button { accent: Accent::Warn, "x" }
			}
		}
		let html = render(filled);
		assert!(html.contains("bg-accent-warn"), "{html}");
		assert!(!html.contains("bg-primary"), "the accent replaces the variant's fill: {html}");

		fn outlined() -> Element {
			rsx! {
				Button { variant: ButtonVariant::Outline, accent: Accent::Warn, "x" }
			}
		}
		let html = render(outlined);
		assert!(html.contains("border-accent-warn/40"), "{html}");
		assert!(!html.contains("bg-accent-warn "), "an outlined button stays outlined: {html}");
	}

	#[test]
	fn class_override_wins() {
		fn app() -> Element {
			rsx! {
				Button { class: "px-6", "x" }
			}
		}
		let html = render(app);
		assert!(html.contains("px-6"));
		assert!(!html.contains("px-4"), "override should drop base px-4: {html}");
	}
}