//! Trait and implementations for formatting CSS properties back into strings.

//!

//! This module defines `FormatAsCssValue` (zero-alloc, `fmt::Formatter`-based)

//! and re-exports `PrintAsCssValue` (from `css.rs`, returns `String`).

//! `PrintAsCssValue` impls for border, padding, margin, and gap types live here.

use alloc::string::String;

use core::fmt;

// Re-export the PrintAsCssValue trait from the css module

pub use crate::css::PrintAsCssValue;

// wildcard imports: this formatter pulls in every layout/style value type it

// renders; enumerating them all explicitly is unmaintainable.

#[allow(clippy::wildcard_imports)]

use crate::props::{

    layout::{dimensions::*, spacing::*},

    style::{

        border::*,

        border_radius::*,

    },

};

/// Zero-allocation CSS value formatting trait using `fmt::Formatter`.

///

/// Unlike `PrintAsCssValue` (which returns a `String`), this trait writes

/// directly into a formatter and is suitable for `Display` impl delegation.

pub trait FormatAsCssValue {

    /// # Errors

    ///

    /// Returns an error if writing to the formatter `f` fails.

    fn format_as_css_value(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result;

}

macro_rules! impl_print_as_css_display {

    ($($t:ty),+ $(,)?) => {

        $(impl PrintAsCssValue for $t {

        })+

    };

}

macro_rules! impl_print_as_css_hash {

    ($($t:ty),+ $(,)?) => {

        $(impl PrintAsCssValue for $t {

        })+

    };

}

// --- Style Properties ---

impl_print_as_css_display!(

    StyleBorderTopLeftRadius,

    StyleBorderTopRightRadius,

    StyleBorderBottomLeftRadius,

    StyleBorderBottomRightRadius,

    StyleBorderTopStyle,

    StyleBorderRightStyle,

    StyleBorderBottomStyle,

    StyleBorderLeftStyle,

    LayoutBorderTopWidth,

    LayoutBorderRightWidth,

    LayoutBorderBottomWidth,

    LayoutBorderLeftWidth,

);

impl_print_as_css_hash!(

    StyleBorderTopColor,

    StyleBorderRightColor,

    StyleBorderBottomColor,

    StyleBorderLeftColor,

);

// --- Layout Spacing Properties ---

impl_print_as_css_display!(

    LayoutPaddingTop,

    LayoutPaddingLeft,

    LayoutPaddingRight,

    LayoutPaddingBottom,

    LayoutPaddingInlineStart,

    LayoutPaddingInlineEnd,

    LayoutMarginTop,

    LayoutMarginLeft,

    LayoutMarginRight,

    LayoutMarginBottom,

    LayoutColumnGap,

    LayoutRowGap,

);