//! Default icon resolver implementations for Azul

//!

//! This module provides the standard callback implementations for icon resolution.

//! The core types and resolution infrastructure are in `azul_core::icon`.

//!

//! # Usage

//!

//! ```rust,ignore

//! use azul_core::icon::IconProviderHandle;

//! use azul_layout::icon::{default_icon_resolver, ImageIconData, FontIconData};

//!

//! // Create provider with the default resolver

//! let provider = IconProviderHandle::with_resolver(default_icon_resolver);

//!

//! // Register an image icon

//! provider.register_icon("app-images", "logo", RefAny::new(ImageIconData { 

//!     image: image_ref, width: 32.0, height: 32.0 

//! }));

//!

//! // Register a font icon

//! provider.register_icon("material-icons", "home", RefAny::new(FontIconData {

//!     font: font_ref, icon_char: "\u{e88a}".to_string()

//! }));

//! ```

use alloc::{

    string::{String, ToString},

    vec::Vec,

};

use azul_css::{

    system::SystemStyle,

    props::basic::{FontRef, StyleFontFamily, StyleFontFamilyVec},

    props::basic::length::FloatValue,

    props::layout::{LayoutWidth, LayoutHeight},

    props::property::CssProperty,

    props::style::filter::{StyleFilter, StyleFilterVec, StyleColorMatrix},

    props::style::text::StyleTextColor,

    dynamic_selector::{CssPropertyWithConditions, CssPropertyWithConditionsVec},

    css::{Css, CssPropertyValue},

};

use azul_core::{

    dom::{Dom, NodeData},

    icon::IconProviderHandle,

    refany::{OptionRefAny, RefAny},

    resources::ImageRef,

    styled_dom::StyledDom,

};

// ============================================================================

// Icon Data Marker Structs (for RefAny::downcast)

// ============================================================================

/// Image-based icon data stored in `RefAny` for the icon resolver.

///

/// Pass to `register_image_icon` or wrap in `RefAny::new(...)` and register

/// directly via `IconProviderHandle::register_icon`.

pub struct ImageIconData {

    pub image: ImageRef,

    /// Width duplicated from ImageRef at registration time

    pub width: f32,

    /// Height duplicated from ImageRef at registration time

    pub height: f32,

}

/// Font-based icon data stored in `RefAny` for the icon resolver.

///

/// Pass to `register_font_icon` or wrap in `RefAny::new(...)` and register

/// directly via `IconProviderHandle::register_icon`.

pub struct FontIconData {

    pub font: FontRef,

    /// The character/codepoint for this specific icon (e.g., "\u{e88a}" for home)

    pub icon_char: String,

}

// ============================================================================

// Default Icon Resolver

// ============================================================================

/// Default icon resolver that handles both image and font icons.

///

/// Resolution logic:

/// 1. If icon_data is None -> return empty div (icon not found)

/// 2. If icon_data contains ImageIconData -> render as image

/// 3. If icon_data contains FontIconData -> render as text with font

/// 4. Unknown data type -> return empty div

///

/// Styles from the original icon DOM are copied to the result,

/// filtered based on SystemStyle preferences.

    // No icon found → empty div

    };

    // Try ImageIconData

    // Try FontIconData

    // Unknown data type → empty div

// Icon DOM Creation (from original)

/// Create a StyledDom for an image-based icon, copying styles from original.

///

/// Applies SystemStyle-aware modifications:

/// - Grayscale filter if `prefer_grayscale` is true

/// - Tint color overlay if `tint_color` is set

    // Copy appropriate styles from original

        // Add default dimensions if not specified in original styles

        // Apply SystemStyle-aware filters

        // Copy accessibility info

/// Create a StyledDom for a font-based icon, copying styles from original.

///

/// Applies SystemStyle-aware modifications:

/// - Text color override if `inherit_text_color` is true

/// - Tint color if `tint_color` is set

    // Add font family

        ]))

    );

        // Apply SystemStyle-aware color modifications for font icons

        // Copy accessibility info

/// Copy styles from original node

/// Returns a Vec for easier manipulation

    // Reconstruct the legacy flat list from the unified Css store.

/// Apply SystemStyle-aware filters to icon properties.

///

/// This adds CSS filters based on accessibility and theming settings:

/// - Grayscale filter if `prefer_grayscale` is true

    // Collect filters to apply

    // Grayscale filter: Uses a color matrix that converts to grayscale

    // Standard luminance weights: R*0.2126 + G*0.7152 + B*0.0722

    // Apply tint color as a flood filter if specified

    // Add filters if any were collected

/// Apply SystemStyle-aware color modifications for font icons.

///

/// Font icons can use text color directly, so we can:

/// - Apply tint color as text color

/// - Inherit text color from parent

    // If tint color is specified, use it as the text color

    // Note: inherit_text_color doesn't need explicit handling - text color

    // is inherited by default in CSS. We only need to NOT override it.

// IconProviderHandle Helper Functions

/// Register an image icon in a pack

    // Get dimensions from ImageRef

/// Register icons from a ZIP file (file names become icon names)

#[cfg(feature = "zip_support")]

#[cfg(not(feature = "zip_support"))]

pub fn register_icons_from_zip(_provider: &mut IconProviderHandle, _pack_name: &str, _zip_bytes: &[u8]) {

    // ZIP support not enabled

}

/// Register a font icon in a pack

// ============================================================================

// ZIP Support

// ============================================================================

/// Load all images from a ZIP file, returning (icon_name, ImageRef, width, height)

#[cfg(all(feature = "zip_support", feature = "image_decoding"))]

    use crate::zip::{ZipFile, ZipReadConfig};

    use crate::image::decode::{decode_raw_image_from_any_bytes, ResultRawImageDecodeImageError};

    use std::path::Path;

    };

        };

        // Decode as image

            // Icon name = filename without extension

    }

#[cfg(not(all(feature = "zip_support", feature = "image_decoding")))]

fn load_images_from_zip(_zip_bytes: &[u8]) -> Vec<(String, ImageRef, f32, f32)> {

    Vec::new()

}

// ============================================================================

// Material Icons Registration

// ============================================================================

/// Register all Material Icons in the provider.

/// 

/// This registers all 2234 Material Icons from the `material-icons` crate.

/// Each icon is registered under the "material-icons" pack with its HTML name

/// (e.g., "home", "settings", "arrow_back", etc.).

/// 

/// Requires the "icons" feature with material-icons crate.

#[cfg(feature = "icons")]

    use material_icons::{ALL_ICONS, icon_to_char, icon_to_html_name};

    // Register all Material Icons with their Unicode codepoints

#[cfg(not(feature = "icons"))]

pub fn register_material_icons(_provider: &mut IconProviderHandle, _font: FontRef) {

    // Icons feature not enabled

}

/// Load the embedded Material Icons font and register all standard icons.

/// 

/// This uses the `material-icons` crate which embeds the Material Icons TTF font.

/// The font is Apache 2.0 licensed by Google.

/// 

/// Returns true if registration was successful.

/// Register all Material Icons from caller-supplied TTF bytes.

///

/// The font bytes are NOT embedded here. `azul-doc codegen all` generates

/// `target/codegen/material_icons.ttf.br`, and `azul-doc` builds (depends

/// on) `azul-layout` — so `include!`ing that generated artifact in this

/// crate is a build cycle (it bit us on `cargo clean`). The `include!` +

/// brotli-decompression live in `azul-dll` (downstream of codegen), which

/// passes the decompressed TTF in here.

#[cfg(all(feature = "icons", feature = "text_layout"))]

    use crate::font::parsed::ParsedFont;

    use crate::parsed_font_to_font_ref;

        None => {

        }

    };

#[cfg(not(all(feature = "icons", feature = "text_layout")))]

pub fn register_embedded_material_icons(

    _provider: &mut IconProviderHandle,

    _font_bytes: &[u8],

) -> bool {

    // Icons or text_layout feature not enabled

    false

}

// ============================================================================

// Convenience Functions

// ============================================================================

/// Create an IconProviderHandle with the default resolver.

// The embedded Material Icons font bytes (the `include!` of the

// codegen-generated `target/codegen/material_icons.ttf.br` + brotli

// decompression) deliberately live in `azul-dll`, not here — see

// `register_embedded_material_icons` above for why (build-cycle: azul-doc

// builds azul-layout to generate that artifact).

// ============================================================================

// Tests

// ============================================================================

#[cfg(test)]

mod tests {

    use super::*;

    #[test]

        // Without data, should return empty div StyledDom

    #[test]

}