Switch

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

//! Markdown rendering for the switch component.

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

/// Switch renders as `**Label:** on/off` (label from aria-label or name),
/// or just `on`/`off` when unlabeled.
impl<Loader: ::proa_core::DataLoader, B: WriteBuf> MdRenderSync<Loader, B> for Switch {
    fn render_md(self, cx: &mut WebContext<Loader, B>) -> Result<(), WriteError> {
        let state = if self.checked { "on" } else { "off" };
        if let Some(label) = self.aria_label.or(self.name) {
            // The labeled form is a block-level `**Label:** state` line.
            block_boundary(cx)?;
            md_sync! { "**" { label } ":** " { state } }.render_md(cx)?;
            block_boundary(cx)?;
        } else {
            // Unlabeled, the bare state is inline text.
            md_sync! { { state } }.render_md(cx)?;
        }
        Ok(())
    }
}

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

    #[test]
    fn switch_off_with_label() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        Switch {
            aria_label: Some("Airplane Mode"),
            ..Switch::new()
        }
        .render_md(&mut cx)
        .unwrap();
        assert_eq!(
            String::from_utf8(buf).unwrap(),
            "**Airplane Mode:** off\n\n"
        );
    }

    #[test]
    fn switch_on_falls_back_to_name() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        Switch {
            name: Some("notifications"),
            ..Switch::checked()
        }
        .render_md(&mut cx)
        .unwrap();
        assert_eq!(String::from_utf8(buf).unwrap(), "**notifications:** on\n\n");
    }

    /// A labeled switch composed after mid-line prose must start its
    /// `**Label:** state` line at a blank-line boundary.
    #[test]
    fn switch_after_prose_starts_new_block() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        cx.write_md_prepared_static(b"intro prose").unwrap();
        Switch {
            aria_label: Some("Airplane Mode"),
            ..Switch::new()
        }
        .render_md(&mut cx)
        .unwrap();
        let output = String::from_utf8(buf).unwrap();
        assert!(
            output.contains("intro prose\n\n**Airplane Mode:** off"),
            "output: {output}"
        );
    }

    #[test]
    fn switch_unlabeled_renders_state_only() {
        let mut buf = Vec::new();
        let mut cx = WebContext::with_buffer(&mut buf);
        Switch::checked().render_md(&mut cx).unwrap();
        assert_eq!(String::from_utf8(buf).unwrap(), "on");
    }
}

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

#![allow(clippy::module_inception)]
//! Switch component - a sliding toggle control
//!
//! The Switch component provides a toggle that switches between checked and
//! unchecked states, styled as a sliding control similar to iOS-style switches.

use crate::Anatomy;

mod md;
mod recipe;
mod switch;

/// Stable DOM parts exposed by Switch.
pub const SWITCH_ANATOMY: Anatomy = Anatomy::new("switch", &["root", "thumb"]);

// Re-export switch types
pub use switch::Switch;

// Re-export recipe types
pub use recipe::{
    switch_recipe, switch_thumb_classes, switch_track_classes, SwitchRecipe, SwitchRecipeProps,
    SwitchSize, SwitchStyle, SWITCH_RECIPE,
};

// Re-export metadata export function (only when feature is enabled)
#[cfg(feature = "metadata-export")]
pub use recipe::export_metadata;

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

    #[test]
    fn anatomy_declares_switch_root_and_thumb() {
        assert_eq!(SWITCH_ANATOMY.scope(), "switch");
        assert_eq!(SWITCH_ANATOMY.parts(), &["root", "thumb"]);
    }
}

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

//! Switch recipe — typed root sizing and a named thumb slot.
//!
//! The root resolves size once and publishes the thumb dimensions as CSS
//! variables. The thumb consumes those variables, keeping the root as the
//! single source of truth for the compound component's appearance.

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

/// Size variants for the switch.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default, proa_macros::ProaVariant)]
#[variant(name = "size")]
pub enum SwitchSize {
    /// Small switch.
    Sm,
    /// Default switch size.
    #[default]
    Default,
}

impl SwitchSize {
    /// Root sizing plus variables inherited by the thumb slot.
    pub const fn classes(self) -> &'static str {
        match self {
            Self::Sm => tw_join!(
                "h-4",
                "w-7",
                "[--switch-thumb-size:0.75rem]",
                "[--switch-thumb-translate:0.75rem]"
            ),
            Self::Default => tw_join!(
                "h-5",
                "w-9",
                "[--switch-thumb-size:1rem]",
                "[--switch-thumb-translate:1rem]"
            ),
        }
    }

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

mod base {
    use super::*;

    pub const SWITCH_ROOT: &str = tw_join!(
        "peer",
        "inline-flex",
        "shrink-0",
        "cursor-pointer",
        "items-center",
        "rounded-full",
        "border-2",
        "border-transparent",
        "shadow-xs",
        "transition-colors",
        "focus-visible:outline-hidden",
        "focus-visible:ring-2",
        "focus-visible:ring-ring",
        "focus-visible:ring-offset-2",
        "focus-visible:ring-offset-background",
        "disabled:cursor-not-allowed",
        "disabled:opacity-50",
        "data-[state=checked]:bg-primary",
        "data-[state=unchecked]:bg-input"
    );

    pub const SWITCH_THUMB: &str = tw_join!(
        "pointer-events-none",
        "block",
        "size-[var(--switch-thumb-size)]",
        "rounded-full",
        "bg-background",
        "shadow-lg",
        "ring-0",
        "transition-transform",
        "data-[state=unchecked]:translate-x-0",
        "data-[state=checked]:translate-x-[var(--switch-thumb-translate)]"
    );

    pub const SWITCH_THUMB_SM_COMPAT: &str = tw_join!(
        "pointer-events-none",
        "block",
        "size-3",
        "rounded-full",
        "bg-background",
        "shadow-lg",
        "ring-0",
        "transition-transform",
        "data-[state=unchecked]:translate-x-0",
        "data-[state=checked]:translate-x-3"
    );

    pub const SWITCH_THUMB_DEFAULT_COMPAT: &str = tw_join!(
        "pointer-events-none",
        "block",
        "size-4",
        "rounded-full",
        "bg-background",
        "shadow-lg",
        "ring-0",
        "transition-transform",
        "data-[state=unchecked]:translate-x-0",
        "data-[state=checked]:translate-x-4"
    );
}

/// Optional inputs accepted by [`SwitchRecipe::resolve`].
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub struct SwitchRecipeProps {
    pub size: Option<SwitchSize>,
}

/// Static named slots for the Switch compound component.
#[derive(Debug, Clone, Copy)]
pub struct SwitchRecipe {
    pub root: &'static str,
    pub thumb: &'static str,
    size_default: SwitchSize,
}

impl SwitchRecipe {
    pub const fn resolve(&'static self, props: SwitchRecipeProps) -> SwitchStyle {
        let size = match props.size {
            Some(size) => size,
            None => self.size_default,
        };

        SwitchStyle { recipe: self, size }
    }
}

/// Fully resolved, streamable Switch root style.
#[must_use]
#[derive(Debug, Clone, Copy)]
pub struct SwitchStyle {
    recipe: &'static SwitchRecipe,
    size: SwitchSize,
}

impl SwitchStyle {
    pub const fn size(self) -> SwitchSize {
        self.size
    }
}

impl AttrValue for SwitchStyle {
    #[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.size.classes().as_bytes())
    }
}

/// Global, zero-initialization Switch recipe.
pub const SWITCH_RECIPE: SwitchRecipe = SwitchRecipe {
    root: base::SWITCH_ROOT,
    thumb: base::SWITCH_THUMB,
    size_default: SwitchSize::Default,
};

pub const fn switch_recipe() -> &'static SwitchRecipe {
    &SWITCH_RECIPE
}

/// Compatibility resolver for the former track helper.
pub const fn switch_track_classes(size: SwitchSize) -> SwitchStyle {
    SWITCH_RECIPE.resolve(SwitchRecipeProps { size: Some(size) })
}

/// Compatibility accessor for the former independently sized thumb helper.
///
/// New render code should use [`SWITCH_RECIPE`]'s `thumb` slot, which inherits
/// the size resolved by the nearest Switch root.
pub const fn switch_thumb_classes(size: SwitchSize) -> &'static str {
    match size {
        SwitchSize::Sm => base::SWITCH_THUMB_SM_COMPAT,
        SwitchSize::Default => base::SWITCH_THUMB_DEFAULT_COMPAT,
    }
}

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

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

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

    fn anatomy(&self) -> Option<crate::Anatomy> {
        Some(super::SWITCH_ANATOMY)
    }
}

#[cfg(feature = "metadata-export")]
pub fn export_metadata() -> crate::variant_spec::ComponentMetadata {
    crate::variant_spec::component_metadata(&SWITCH_RECIPE)
}

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

    #[test]
    fn recipe_exposes_root_and_thumb_slots() {
        let recipe = switch_recipe();
        assert!(recipe.root.contains("inline-flex"));
        assert!(recipe.root.contains("data-[state=checked]:bg-primary"));
        assert!(recipe.thumb.contains("--switch-thumb-size"));
        assert!(recipe.thumb.contains("--switch-thumb-translate"));
    }

    #[test]
    fn recipe_resolves_defaults_and_overrides() {
        let default = SWITCH_RECIPE.resolve(SwitchRecipeProps::default());
        assert_eq!(default.size(), SwitchSize::Default);
        assert!(default.size().classes().contains("h-5"));

        let small = SWITCH_RECIPE.resolve(SwitchRecipeProps {
            size: Some(SwitchSize::Sm),
        });
        assert_eq!(small.size(), SwitchSize::Sm);
        assert!(small.size().classes().contains("h-4"));
    }

    #[test]
    fn every_size_sets_both_inherited_thumb_variables() {
        for size in [SwitchSize::Sm, SwitchSize::Default] {
            assert!(size.classes().contains("--switch-thumb-size"));
            assert!(size.classes().contains("--switch-thumb-translate"));
        }
    }

    #[test]
    fn compatibility_thumb_helper_remains_size_specific() {
        assert!(switch_thumb_classes(SwitchSize::Sm).contains("size-3"));
        assert!(switch_thumb_classes(SwitchSize::Default).contains("size-4"));
    }
}

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

//! Switch component implementation
//!
//! A toggle control that switches between checked and unchecked states.
//! Styled as a sliding toggle, similar to iOS-style switches.
use super::recipe::{SwitchRecipeProps, SwitchSize, SWITCH_RECIPE};
use super::SWITCH_ANATOMY;
use proa_core::{WebContext, WebRenderSync, WriteBuf};
use proa_macros::html_sync;
/// Switch component - a sliding toggle control
///
/// # Example
///
/// ```ignore
/// use proa_ui::{Switch, SwitchSize};
/// use proa_macros::html_sync;
///
/// html_sync! {
///     <div class="flex items-center gap-2">
///         {Switch {
///             id: Some("airplane-mode"),
///             ..Switch::new()
///         }}
///         <label for="airplane-mode">"Airplane Mode"</label>
///     </div>
/// }
/// ```
pub struct Switch {
    /// Size variant
    pub size: SwitchSize,
    /// Whether the switch is checked (on)
    pub checked: bool,
    /// Whether the switch is disabled
    pub disabled: bool,
    /// The name attribute for form submission
    pub name: Option<&'static str>,
    /// The id attribute
    pub id: Option<&'static str>,
    /// Additional CSS classes
    pub class: Option<&'static str>,
    /// ARIA label for accessibility
    pub aria_label: Option<&'static str>,
}
impl Switch {
    /// Create a new switch with default settings
    pub const fn new() -> Self {
        Self {
            size: SwitchSize::Default,
            checked: false,
            disabled: false,
            name: None,
            id: None,
            class: None,
            aria_label: None,
        }
    }
    /// Create a checked switch
    pub const fn checked() -> Self {
        Self {
            size: SwitchSize::Default,
            checked: true,
            disabled: false,
            name: None,
            id: None,
            class: None,
            aria_label: None,
        }
    }
}
impl Default for Switch {
    fn default() -> Self {
        Self::new()
    }
}
impl<B: WriteBuf, L: ::proa_core::DataLoader> WebRenderSync<L, B> for Switch {
    #[inline(always)]
    fn render(
        self,
        cx: &mut WebContext<L, B>,
    ) -> Result<(), proa_core::shared::write_buf::WriteError> {
        let style = SWITCH_RECIPE.resolve(SwitchRecipeProps {
            size: Some(self.size),
        });
        let checked_state = crate::CheckedState::from_checked(self.checked);
        let form_state = crate::FormControlState {
            disabled: self.disabled,
            ..crate::FormControlState::enabled()
        };
        html_sync! {
            <button
                type="button"
                role="switch"
                aria-checked={checked_state.aria_checked()}
                aria-disabled={form_state.aria_disabled()}
                aria-label={self.aria_label}
                data-state={checked_state}
                data-disabled={form_state.data_disabled()}
                data-size={style.size().as_str()}
                data-switch
                data-scope={SWITCH_ANATOMY.scope()}
                data-part="root"
                data-slot="switch"
                id={self.id}
                name={self.name}
                disabled={self.disabled}
                class={proa_macros::text!("{} {}", style, self.class)}
            >
                <span
                    data-switch-thumb
                    data-scope={SWITCH_ANATOMY.scope()}
                    data-part="thumb"
                    data-slot="switch-thumb"
                    data-state={checked_state}
                    class={SWITCH_RECIPE.thumb}
                ></span>
            </button>
        }
        .render(cx)
    }
}
#[cfg(test)]
mod tests {
    use super::*;
    use proa_core::ctx::Ctx;
    #[test]
    fn switch_renders_with_defaults() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch::new().render(&mut cx).unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("<button"));
        assert!(html.contains("role=\"switch\""));
        assert!(html.contains("aria-checked=\"false\""));
        assert!(html.contains("data-state=\"unchecked\""));
        assert!(html.contains("data-switch"));
        assert!(html.contains("data-slot=\"switch\""));
        assert!(html.contains("data-switch-thumb"));
        assert!(html.contains("data-slot=\"switch-thumb\""));
        assert!(html.contains("data-scope=\"switch\""));
        assert!(html.contains("data-part=\"root\""));
        assert!(html.contains("data-part=\"thumb\""));
        assert!(html.contains("data-size=\"default\""));
        assert!(html.contains("aria-disabled=\"false\""));
    }
    #[test]
    fn switch_renders_checked_state() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch::checked().render(&mut cx).unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("aria-checked=\"true\""));
        assert!(html.contains("data-state=\"checked\""));
    }
    #[test]
    fn switch_renders_disabled() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch {
            disabled: true,
            ..Switch::new()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains(" disabled"));
        assert!(html.contains("data-disabled=\"true\""));
        assert!(html.contains("aria-disabled=\"true\""));
    }
    #[test]
    fn switch_renders_with_id_and_name() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch {
            id: Some("my-switch"),
            name: Some("notifications"),
            ..Switch::new()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("id=\"my-switch\""));
        assert!(html.contains("name=\"notifications\""));
    }
    #[test]
    fn switch_renders_aria_label() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch {
            aria_label: Some("Enable notifications"),
            ..Switch::new()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("aria-label=\"Enable notifications\""));
    }
    #[test]
    fn switch_renders_custom_class() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch {
            class: Some("custom-switch"),
            ..Switch::new()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("custom-switch"));
    }
    #[test]
    fn switch_has_track_base_classes() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch::new().render(&mut cx).unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("inline-flex"));
        assert!(html.contains("rounded-full"));
        assert!(html.contains("cursor-pointer"));
    }
    #[test]
    fn switch_has_thumb_classes() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch::new().render(&mut cx).unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("pointer-events-none"));
        assert!(html.contains("bg-background"));
        assert!(html.contains("shadow-lg"));
    }
    #[test]
    fn switch_renders_sm_size() {
        let mut out = Vec::new();
        let mut cx = Ctx::with_buffer(&mut out);
        Switch {
            size: SwitchSize::Sm,
            ..Switch::new()
        }
        .render(&mut cx)
        .unwrap();
        let html = String::from_utf8(out).unwrap();
        assert!(html.contains("h-4"));
        assert!(html.contains("w-7"));
        assert!(html.contains("--switch-thumb-size:0.75rem"));
        assert!(html.contains("size-[var(--switch-thumb-size)]"));
    }
    #[test]
    fn switch_size_is_reasonable() {
        assert!(std::mem::size_of::<Switch>() < 256);
        const _SWITCH: Switch = Switch::new();
    }
}