Toggle

// SPDX-FileCopyrightText: 2026 Proa Labs, Inc.
// SPDX-License-Identifier: MIT OR Apache-2.0

//! Markdown rendering for the toggle component.

use super::Toggle;
use crate::components::md_support::line_boundary;
use proa_core::WebContext;
use proa_core::{MdRenderSync, WriteBuf, WriteError};
use proa_macros::md_sync;

/// Toggle renders as a task-list item — `- [x] Label` when pressed,
/// `- [ ] Label` when not. The label comes from the children (rendered
/// inline) or the aria-label.
impl<Loader: ::proa_core::DataLoader, B: WriteBuf, C: MdRenderSync<Loader, B>>
    MdRenderSync<Loader, B> for Toggle<C>
{
    fn render_md(self, cx: &mut WebContext<Loader, B>) -> Result<(), WriteError> {
        let mark = if self.pressed { "x" } else { " " };
        // Fresh line (not a full blank-line boundary): a lone toggle after
        // prose needs its own line, but consecutive toggles in a group must
        // stay adjacent with no blank line between them.
        line_boundary(cx)?;
        cx.write_md_list_indent()?;
        md_sync! { "- [" { mark } "] " }.render_md(cx)?;
        let prev = cx.md_set_inline(true);
        if let Some(children) = self.children {
            children.render_md(cx)?;
        } else if let Some(label) = self.aria_label {
            cx.write_md_text(label)?;
        }
        cx.md_set_inline(prev);
        md_sync! { "" "\n" }.render_md(cx)
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn toggle_unpressed_renders_children() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        Toggle {
            children: Some("Bold"),
            ..Default::default()
        }
        .render_md(&mut cx)
        .unwrap();
        assert_eq!(String::from_utf8(buf).unwrap(), "- [ ] Bold\n");
    }

    #[test]
    fn toggle_pressed_marks_item() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        Toggle {
            pressed: true,
            children: Some("Italic"),
            ..Default::default()
        }
        .render_md(&mut cx)
        .unwrap();
        assert_eq!(String::from_utf8(buf).unwrap(), "- [x] Italic\n");
    }

    /// A toggle composed after mid-line prose must start its task item on a
    /// fresh line, while consecutive toggles stay blank-line free.
    #[test]
    fn toggle_after_prose_starts_on_fresh_line() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        cx.write_md_prepared_static(b"intro prose").unwrap();
        Toggle {
            children: Some("Bold"),
            ..Default::default()
        }
        .render_md(&mut cx)
        .unwrap();
        Toggle {
            pressed: true,
            children: Some("Italic"),
            ..Default::default()
        }
        .render_md(&mut cx)
        .unwrap();
        let output = String::from_utf8(buf).unwrap();
        assert!(
            output.contains("intro prose\n- [ ] Bold"),
            "output: {output}"
        );
        assert!(
            output.contains("- [ ] Bold\n- [x] Italic\n"),
            "output: {output}"
        );
    }

    #[test]
    fn toggle_falls_back_to_aria_label() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        Toggle::<&str> {
            aria_label: Some("Toggle bold"),
            ..Default::default()
        }
        .render_md(&mut cx)
        .unwrap();
        assert_eq!(String::from_utf8(buf).unwrap(), "- [ ] Toggle bold\n");
    }
}

// SPDX-FileCopyrightText: 2026 Proa Labs, Inc.
// SPDX-License-Identifier: (MIT OR Apache-2.0) AND MIT

//! Toggle component module
//!
//! A two-state button that can be either on or off.
//!
//! Based on Radix UI Toggle with shadcn/ui styling.

mod md;
#[allow(clippy::module_inception)]
mod recipe;
mod toggle;

pub use recipe::{
    toggle_recipe, ToggleRecipe, ToggleRecipeProps, ToggleSize, ToggleStyle, ToggleVariant,
    TOGGLE_RECIPE,
};
pub use toggle::Toggle;

// SPDX-FileCopyrightText: 2026 Proa Labs, Inc.
// SPDX-License-Identifier: (MIT OR Apache-2.0) AND MIT

//! Toggle recipe - styling system for toggle component
//!
//! Provides Tailwind classes for toggle styling following shadcn patterns.

use crate::tw_join;
use proa_core::shared::attr_value::AttrValue;
use proa_core::{DataLoader, WebContext, WriteBuf, WriteError};

/// Toggle variant
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default, proa_macros::ProaVariant)]
#[variant(name = "variant")]
pub enum ToggleVariant {
    /// Default transparent toggle
    #[default]
    Default,
    /// Outlined toggle with border
    Outline,
}

impl ToggleVariant {
    pub const fn as_str(self) -> &'static str {
        match self {
            ToggleVariant::Default => "default",
            ToggleVariant::Outline => "outline",
        }
    }

    pub const fn classes(self) -> &'static str {
        toggle_variant_classes(self)
    }
}

/// Toggle size
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default, proa_macros::ProaVariant)]
#[variant(name = "size")]
pub enum ToggleSize {
    /// Small toggle
    Sm,
    /// Default medium toggle
    #[default]
    Default,
    /// Large toggle
    Lg,
}

impl ToggleSize {
    pub const fn as_str(self) -> &'static str {
        match self {
            ToggleSize::Sm => "sm",
            ToggleSize::Default => "default",
            ToggleSize::Lg => "lg",
        }
    }

    pub const fn classes(self) -> &'static str {
        toggle_size_classes(self)
    }
}

/// Base toggle styles
pub const TOGGLE_BASE: &str = tw_join!(
    "inline-flex",
    "items-center",
    "justify-center",
    "gap-2",
    "rounded-md",
    "text-sm",
    "font-medium",
    "transition-colors",
    "hover:bg-muted",
    "hover:text-muted-foreground",
    "disabled:pointer-events-none",
    "disabled:opacity-50",
    "data-[state=on]:bg-accent",
    "data-[state=on]:text-accent-foreground",
    "focus-visible:outline-hidden",
    "focus-visible:ring-2",
    "focus-visible:ring-ring",
    "focus-visible:ring-offset-2",
    "ring-offset-background"
);

/// Default variant classes
pub const TOGGLE_VARIANT_DEFAULT: &str = "bg-transparent";

/// Outline variant classes
pub const TOGGLE_VARIANT_OUTLINE: &str = tw_join!(
    "border",
    "border-input",
    "bg-transparent",
    "shadow-sm",
    "hover:bg-accent",
    "hover:text-accent-foreground"
);

/// Small size classes
pub const TOGGLE_SIZE_SM: &str = tw_join!("h-8", "px-1.5", "min-w-8");

/// Default size classes
pub const TOGGLE_SIZE_DEFAULT: &str = tw_join!("h-9", "px-2", "min-w-9");

/// Large size classes
pub const TOGGLE_SIZE_LG: &str = tw_join!("h-10", "px-2.5", "min-w-10");

/// Get toggle base classes
pub const fn toggle_base_classes() -> &'static str {
    TOGGLE_BASE
}

/// Get variant classes
pub const fn toggle_variant_classes(variant: ToggleVariant) -> &'static str {
    match variant {
        ToggleVariant::Default => TOGGLE_VARIANT_DEFAULT,
        ToggleVariant::Outline => TOGGLE_VARIANT_OUTLINE,
    }
}

/// Get size classes
pub const fn toggle_size_classes(size: ToggleSize) -> &'static str {
    match size {
        ToggleSize::Sm => TOGGLE_SIZE_SM,
        ToggleSize::Default => TOGGLE_SIZE_DEFAULT,
        ToggleSize::Lg => TOGGLE_SIZE_LG,
    }
}

/// Optional inputs accepted by [`ToggleRecipe::resolve`].
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub struct ToggleRecipeProps {
    pub variant: Option<ToggleVariant>,
    pub size: Option<ToggleSize>,
}

/// Compile-time Toggle recipe.
#[derive(Debug, Clone, Copy)]
pub struct ToggleRecipe {
    root: &'static str,
    variant_default: ToggleVariant,
    size_default: ToggleSize,
}

impl ToggleRecipe {
    pub const fn resolve(&'static self, props: ToggleRecipeProps) -> ToggleStyle {
        let variant = match props.variant {
            Some(variant) => variant,
            None => self.variant_default,
        };
        let size = match props.size {
            Some(size) => size,
            None => self.size_default,
        };

        ToggleStyle {
            recipe: self,
            variant,
            size,
        }
    }
}

/// Fully resolved, streamable Toggle style.
#[must_use]
#[derive(Debug, Clone, Copy)]
pub struct ToggleStyle {
    recipe: &'static ToggleRecipe,
    variant: ToggleVariant,
    size: ToggleSize,
}

impl ToggleStyle {
    pub const fn variant(self) -> ToggleVariant {
        self.variant
    }

    pub const fn size(self) -> ToggleSize {
        self.size
    }
}

impl AttrValue for ToggleStyle {
    #[inline(always)]
    fn should_render(&self) -> bool {
        true
    }

    #[inline(always)]
    fn render_attr_value<B: WriteBuf, L: DataLoader>(
        &self,
        cx: &mut WebContext<L, B>,
    ) -> Result<(), WriteError> {
        cx.out.extend_static(self.recipe.root.as_bytes())?;
        cx.out.extend_static(b" ")?;
        cx.out.extend_static(self.variant.classes().as_bytes())?;
        cx.out.extend_static(b" ")?;
        cx.out.extend_static(self.size.classes().as_bytes())
    }
}

pub const TOGGLE_RECIPE: ToggleRecipe = ToggleRecipe {
    root: toggle_base_classes(),
    variant_default: ToggleVariant::Default,
    size_default: ToggleSize::Default,
};

pub const fn toggle_recipe() -> &'static ToggleRecipe {
    &TOGGLE_RECIPE
}

impl crate::variant_spec::ComponentSpec for ToggleRecipe {
    const NAME: &'static str = "Toggle";

    fn base_classes(&self) -> &'static str {
        self.root
    }

    fn variant_metadata(&self) -> Vec<crate::variant_spec::VariantMetadata> {
        vec![
            crate::variant_spec::variant_metadata::<ToggleVariant>(),
            crate::variant_spec::variant_metadata::<ToggleSize>(),
        ]
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn toggle_base_has_flex() {
        let classes = toggle_base_classes();
        assert!(classes.contains("inline-flex"));
        assert!(classes.contains("data-[state=on]:bg-accent"));
    }

    #[test]
    fn toggle_variant_default_is_transparent() {
        let classes = toggle_variant_classes(ToggleVariant::Default);
        assert!(classes.contains("bg-transparent"));
    }

    #[test]
    fn toggle_variant_outline_has_border() {
        let classes = toggle_variant_classes(ToggleVariant::Outline);
        assert!(classes.contains("border"));
        assert!(classes.contains("border-input"));
    }

    #[test]
    fn toggle_sizes_have_correct_height() {
        assert!(toggle_size_classes(ToggleSize::Sm).contains("h-8"));
        assert!(toggle_size_classes(ToggleSize::Default).contains("h-9"));
        assert!(toggle_size_classes(ToggleSize::Lg).contains("h-10"));
    }

    #[test]
    fn recipe_resolves_defaults_and_overrides() {
        let default = toggle_recipe().resolve(ToggleRecipeProps::default());
        assert_eq!(default.variant(), ToggleVariant::Default);
        assert_eq!(default.size(), ToggleSize::Default);

        let custom = toggle_recipe().resolve(ToggleRecipeProps {
            variant: Some(ToggleVariant::Outline),
            size: Some(ToggleSize::Lg),
        });
        assert_eq!(custom.variant(), ToggleVariant::Outline);
        assert_eq!(custom.size(), ToggleSize::Lg);
    }
}

// SPDX-FileCopyrightText: 2026 Proa Labs, Inc.
// SPDX-License-Identifier: (MIT OR Apache-2.0) AND MIT

//! Toggle component implementation
//!
//! A two-state button that can be either on or off.
//! Based on Radix UI Toggle with shadcn/ui styling.
use super::recipe::{ToggleRecipeProps, ToggleSize, ToggleVariant, TOGGLE_RECIPE};
use proa_core::{WebContext, WebRenderSync, WriteBuf};
use proa_macros::html_sync;
/// Toggle component - a two-state button
///
/// # Example
///
/// ```ignore
/// use proa_ui::{Toggle, ToggleVariant, ToggleSize};
/// use proa_macros::html_sync;
///
/// html_sync! {
///     {Toggle {
///         pressed: false,
///         children: Some("B"),
///         ..Default::default()
///     }}
/// }
/// ```
pub struct Toggle<C = ()> {
    /// Whether the toggle is pressed (on)
    pub pressed: bool,
    /// Visual variant
    pub variant: ToggleVariant,
    /// Toggle size
    pub size: ToggleSize,
    /// Whether the toggle is disabled
    pub disabled: bool,
    /// ARIA label for accessibility
    pub aria_label: Option<&'static str>,
    /// Additional classes
    pub class: Option<&'static str>,
    /// Toggle content (usually an icon or text)
    pub children: Option<C>,
}
impl Toggle<()> {
    pub const fn new() -> Self {
        Self {
            pressed: false,
            variant: ToggleVariant::Default,
            size: ToggleSize::Default,
            disabled: false,
            aria_label: None,
            class: None,
            children: None,
        }
    }
}
impl<C> Default for Toggle<C> {
    fn default() -> Self {
        Self {
            pressed: false,
            variant: ToggleVariant::Default,
            size: ToggleSize::Default,
            disabled: false,
            aria_label: None,
            class: None,
            children: None,
        }
    }
}
impl<B: WriteBuf, C: WebRenderSync<L, B>, L: ::proa_core::DataLoader> WebRenderSync<L, B>
    for Toggle<C>
{
    fn render(
        self,
        cx: &mut WebContext<L, B>,
    ) -> Result<(), proa_core::shared::write_buf::WriteError> {
        let style = TOGGLE_RECIPE.resolve(ToggleRecipeProps {
            variant: Some(self.variant),
            size: Some(self.size),
        });
        let state = if self.pressed { "on" } else { "off" };
        let aria_pressed = if self.pressed { "true" } else { "false" };
        let disabled = if self.disabled { "true" } else { "false" };
        html_sync! {
            <button
                type="button"
                data-toggle
                data-slot="toggle"
                data-variant={style.variant().as_str()}
                data-size={style.size().as_str()}
                data-state={state}
                data-disabled={disabled}
                aria-pressed={aria_pressed}
                aria-label={self.aria_label}
                disabled={self.disabled}
                class={proa_macros::text!("{} {}", style, self.class)}
            >
                {self.children}
            </button>
        }
        .render(cx)
    }
}
#[cfg(test)]
mod tests {
    use super::*;
    use proa_core::ctx::Ctx;
    use proa_core::text::text;
    #[test]
    fn toggle_renders_with_data_attributes() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Toggle {
            pressed: false,
            children: Some(text("B")),
            ..Default::default()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("data-toggle"));
        assert!(html.contains("data-slot=\"toggle\""));
        assert!(html.contains("data-size=\"default\""));
        assert!(html.contains("data-state=\"off\""));
        assert!(html.contains("aria-pressed=\"false\""));
    }
    #[test]
    fn toggle_pressed_state() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Toggle {
            pressed: true,
            children: Some(text("B")),
            ..Default::default()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("data-state=\"on\""));
        assert!(html.contains("aria-pressed=\"true\""));
    }
    #[test]
    fn toggle_disabled_state() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Toggle {
            disabled: true,
            children: Some(text("B")),
            ..Default::default()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("data-disabled=\"true\""));
        assert!(html.contains(" disabled"));
    }
    #[test]
    fn toggle_with_aria_label() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Toggle {
            aria_label: Some("Toggle bold"),
            children: Some(text("B")),
            ..Default::default()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("aria-label=\"Toggle bold\""));
    }
    #[test]
    fn toggle_outline_variant() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Toggle {
            variant: ToggleVariant::Outline,
            children: Some(text("B")),
            ..Default::default()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("border"));
    }
}