//! CSS properties for graphical effects like blur, drop-shadow, etc.

//!

//! Defines [`StyleFilter`] and [`StyleFilterVec`] for CSS filter functions

//! (blur, opacity, drop-shadow, color-matrix, brightness, contrast, etc.).

//! Filters are applied via the WebRender compositor (`compositor2`) or the

//! software CPU renderer (`cpurender`).

use alloc::{

    string::{String, ToString},

    vec::Vec,

};

use core::{fmt, num::ParseFloatError};

#[cfg(feature = "parser")]

use crate::props::basic::{

    error::{InvalidValueErr, InvalidValueErrOwned, WrongComponentCountError},

    length::parse_float_value,

    parse::{parse_parentheses, ParenthesisParseError, ParenthesisParseErrorOwned},

};

use crate::{

    format_rust_code::GetHash,

    props::{

        basic::{

            angle::{AngleValue, parse_angle_value, CssAngleValueParseError, CssAngleValueParseErrorOwned},

            color::{parse_css_color, ColorU, CssColorParseError, CssColorParseErrorOwned},

            length::{FloatValue, PercentageParseError, PercentageValue},

            pixel::{

                parse_pixel_value, CssPixelValueParseError, CssPixelValueParseErrorOwned,

                PixelValue,

            },

        },

        formatter::PrintAsCssValue,

        style::{

            box_shadow::{

                parse_style_box_shadow, CssShadowParseError, CssShadowParseErrorOwned,

                StyleBoxShadow,

            },

            effects::{parse_style_mix_blend_mode, MixBlendModeParseError, StyleMixBlendMode},

        },

    },

};

// --- TYPE DEFINITIONS ---

#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

#[repr(C, u8)]

pub enum StyleFilter {

    Blend(StyleMixBlendMode),

    Flood(ColorU),

    Blur(StyleBlur),

    Opacity(PercentageValue),

    ColorMatrix(StyleColorMatrix),

    DropShadow(StyleBoxShadow),

    ComponentTransfer,

    Offset(StyleFilterOffset),

    Composite(StyleCompositeFilter),

    // Standard CSS filter functions

    Brightness(PercentageValue),

    Contrast(PercentageValue),

    Grayscale(PercentageValue),

    HueRotate(AngleValue),

    Invert(PercentageValue),

    Saturate(PercentageValue),

    Sepia(PercentageValue),

}

impl_option!(

    StyleFilter,

    OptionStyleFilter,

    copy = false,

    [Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash]

);

impl_vec!(StyleFilter, StyleFilterVec, StyleFilterVecDestructor, StyleFilterVecDestructorType, StyleFilterVecSlice, OptionStyleFilter);

impl_vec_clone!(StyleFilter, StyleFilterVec, StyleFilterVecDestructor);

impl_vec_debug!(StyleFilter, StyleFilterVec);

impl_vec_eq!(StyleFilter, StyleFilterVec);

impl_vec_ord!(StyleFilter, StyleFilterVec);

impl_vec_hash!(StyleFilter, StyleFilterVec);

impl_vec_partialeq!(StyleFilter, StyleFilterVec);

impl_vec_partialord!(StyleFilter, StyleFilterVec);

#[derive(Debug, Default, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

#[repr(C)]

pub struct StyleBlur {

    pub width: PixelValue,

    pub height: PixelValue,

}

/// Color matrix with 20 float values for color transformation.

/// Layout: 4 rows × 5 columns (RGBA + offset for each channel)

#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

#[repr(C)]

pub struct StyleColorMatrix {

    pub m0: FloatValue,

    pub m1: FloatValue,

    pub m2: FloatValue,

    pub m3: FloatValue,

    pub m4: FloatValue,

    pub m5: FloatValue,

    pub m6: FloatValue,

    pub m7: FloatValue,

    pub m8: FloatValue,

    pub m9: FloatValue,

    pub m10: FloatValue,

    pub m11: FloatValue,

    pub m12: FloatValue,

    pub m13: FloatValue,

    pub m14: FloatValue,

    pub m15: FloatValue,

    pub m16: FloatValue,

    pub m17: FloatValue,

    pub m18: FloatValue,

    pub m19: FloatValue,

}

impl StyleColorMatrix {

}

#[derive(Debug, Default, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

#[repr(C)]

pub struct StyleFilterOffset {

    pub x: PixelValue,

    pub y: PixelValue,

}

/// Arithmetic coefficients for composite filter (k1, k2, k3, k4).

/// Result = k1*i1*i2 + k2*i1 + k3*i2 + k4

#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

#[repr(C)]

pub struct ArithmeticCoefficients {

    pub k1: FloatValue,

    pub k2: FloatValue,

    pub k3: FloatValue,

    pub k4: FloatValue,

}

#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]

#[repr(C, u8)]

pub enum StyleCompositeFilter {

    Over,

    In,

    Atop,

    Out,

    Xor,

    Lighter,

    Arithmetic(ArithmeticCoefficients),

}

// --- PRINTING IMPLEMENTATIONS ---

impl PrintAsCssValue for StyleFilterVec {

}

// Formatting to Rust code for StyleFilterVec

impl crate::format_rust_code::FormatAsRustCode for StyleFilterVec {

        )

}

impl PrintAsCssValue for StyleFilter {

                } else {

                }

            }

            ),

            }

        }

}

impl PrintAsCssValue for StyleCompositeFilter {

            }

        }

}

// --- PARSER ---

#[cfg(feature = "parser")]

pub mod parser {

    use super::*;

    use crate::props::basic::parse_percentage_value;

    use crate::corety::AzString;

    // -- Top-level Filter Error --

    #[derive(Clone, PartialEq)]

    pub enum CssStyleFilterParseError<'a> {

        InvalidFilter(&'a str),

        InvalidParenthesis(ParenthesisParseError<'a>),

        Shadow(CssShadowParseError<'a>),

        BlendMode(InvalidValueErr<'a>),

        Color(CssColorParseError<'a>),

        Opacity(PercentageParseError),

        Brightness(PercentageParseError),

        Contrast(PercentageParseError),

        Saturate(PercentageParseError),

        Blur(CssStyleBlurParseError<'a>),

        ColorMatrix(CssStyleColorMatrixParseError<'a>),

        Offset(CssStyleFilterOffsetParseError<'a>),

        Composite(CssStyleCompositeFilterParseError<'a>),

        Angle(CssAngleValueParseError<'a>),

    }

    impl_debug_as_display!(CssStyleFilterParseError<'a>);

    impl_display! { CssStyleFilterParseError<'a>, {

        InvalidFilter(e) => format!("Invalid filter function: \"{}\"", e),

        InvalidParenthesis(e) => format!("Invalid filter syntax - parenthesis error: {}", e),

        Shadow(e) => format!("Error parsing drop-shadow(): {}", e),

        BlendMode(e) => format!("Error parsing blend(): invalid value \"{}\"", e.0),

        Color(e) => format!("Error parsing flood(): {}", e),

        Opacity(e) => format!("Error parsing opacity(): {}", e),

        Brightness(e) => format!("Error parsing brightness(): {}", e),

        Contrast(e) => format!("Error parsing contrast(): {}", e),

        Saturate(e) => format!("Error parsing saturate(): {}", e),

        Blur(e) => format!("Error parsing blur(): {}", e),

        ColorMatrix(e) => format!("Error parsing color-matrix(): {}", e),

        Offset(e) => format!("Error parsing offset(): {}", e),

        Composite(e) => format!("Error parsing composite(): {}", e),

        Angle(e) => format!("Error parsing hue-rotate(): {}", e),

    }}

    impl_from!(

        ParenthesisParseError<'a>,

        CssStyleFilterParseError::InvalidParenthesis

    );

    impl_from!(InvalidValueErr<'a>, CssStyleFilterParseError::BlendMode);

    impl_from!(CssStyleBlurParseError<'a>, CssStyleFilterParseError::Blur);

    impl_from!(CssColorParseError<'a>, CssStyleFilterParseError::Color);

    impl_from!(

        CssStyleColorMatrixParseError<'a>,

        CssStyleFilterParseError::ColorMatrix

    );

    impl_from!(

        CssStyleFilterOffsetParseError<'a>,

        CssStyleFilterParseError::Offset

    );

    impl_from!(

        CssStyleCompositeFilterParseError<'a>,

        CssStyleFilterParseError::Composite

    );

    impl_from!(CssShadowParseError<'a>, CssStyleFilterParseError::Shadow);

    impl_from!(CssAngleValueParseError<'a>, CssStyleFilterParseError::Angle);

    impl<'a> From<PercentageParseError> for CssStyleFilterParseError<'a> {

    }

    impl<'a> From<MixBlendModeParseError<'a>> for CssStyleFilterParseError<'a> {

            // Extract the InvalidValueErr from the MixBlendModeParseError

            }

    }

    #[derive(Debug, Clone, PartialEq)]

    #[repr(C, u8)]

    pub enum CssStyleFilterParseErrorOwned {

        InvalidFilter(AzString),

        InvalidParenthesis(ParenthesisParseErrorOwned),

        Shadow(CssShadowParseErrorOwned),

        BlendMode(InvalidValueErrOwned),

        Color(CssColorParseErrorOwned),

        Opacity(PercentageParseError),

        Brightness(PercentageParseError),

        Contrast(PercentageParseError),

        Saturate(PercentageParseError),

        Blur(CssStyleBlurParseErrorOwned),

        ColorMatrix(CssStyleColorMatrixParseErrorOwned),

        Offset(CssStyleFilterOffsetParseErrorOwned),

        Composite(CssStyleCompositeFilterParseErrorOwned),

        Angle(CssAngleValueParseErrorOwned),

    }

    impl<'a> CssStyleFilterParseError<'a> {

                }

                }

                }

            }

    }

    impl CssStyleFilterParseErrorOwned {

                }

            }

    }

    // -- Sub-Errors for each filter function --

    #[derive(Clone, PartialEq)]

    pub enum CssStyleBlurParseError<'a> {

        Pixel(CssPixelValueParseError<'a>),

        TooManyComponents(&'a str),

    }

    impl_debug_as_display!(CssStyleBlurParseError<'a>);

    impl_display! { CssStyleBlurParseError<'a>, {

        Pixel(e) => format!("Invalid pixel value: {}", e),

        TooManyComponents(input) => format!("Expected 1 or 2 components, got more: \"{}\"", input),

    }}

    impl_from!(CssPixelValueParseError<'a>, CssStyleBlurParseError::Pixel);

    #[derive(Debug, Clone, PartialEq)]

    #[repr(C, u8)]

    pub enum CssStyleBlurParseErrorOwned {

        Pixel(CssPixelValueParseErrorOwned),

        TooManyComponents(AzString),

    }

    impl<'a> CssStyleBlurParseError<'a> {

                }

            }

    }

    impl CssStyleBlurParseErrorOwned {

            }

    }

    #[derive(Clone, PartialEq)]

    pub enum CssStyleColorMatrixParseError<'a> {

        Float(ParseFloatError),

        WrongNumberOfComponents {

            expected: usize,

            got: usize,

            input: &'a str,

        },

    }

    impl_debug_as_display!(CssStyleColorMatrixParseError<'a>);

    impl_display! { CssStyleColorMatrixParseError<'a>, {

        Float(e) => format!("Error parsing floating-point value: {}", e),

        WrongNumberOfComponents { expected, got, input } => format!("Expected {} components, got {}: \"{}\"", expected, got, input),

    }}

    impl<'a> From<ParseFloatError> for CssStyleColorMatrixParseError<'a> {

    }

    #[derive(Debug, Clone, PartialEq)]

    #[repr(C, u8)]

    pub enum CssStyleColorMatrixParseErrorOwned {

        Float(crate::props::basic::error::ParseFloatError),

        WrongNumberOfComponents(WrongComponentCountError),

    }

    impl<'a> CssStyleColorMatrixParseError<'a> {

            }

    }

    impl CssStyleColorMatrixParseErrorOwned {

            }

    }

    #[derive(Clone, PartialEq)]

    pub enum CssStyleFilterOffsetParseError<'a> {

        Pixel(CssPixelValueParseError<'a>),

        WrongNumberOfComponents {

            expected: usize,

            got: usize,

            input: &'a str,

        },

    }

    impl_debug_as_display!(CssStyleFilterOffsetParseError<'a>);

    impl_display! { CssStyleFilterOffsetParseError<'a>, {

        Pixel(e) => format!("Invalid pixel value: {}", e),

        WrongNumberOfComponents { expected, got, input } => format!("Expected {} components, got {}: \"{}\"", expected, got, input),

    }}

    impl_from!(

        CssPixelValueParseError<'a>,

        CssStyleFilterOffsetParseError::Pixel

    );

    #[derive(Debug, Clone, PartialEq)]

    #[repr(C, u8)]

    pub enum CssStyleFilterOffsetParseErrorOwned {

        Pixel(CssPixelValueParseErrorOwned),

        WrongNumberOfComponents(WrongComponentCountError),

    }

    impl<'a> CssStyleFilterOffsetParseError<'a> {

            }

    }

    impl CssStyleFilterOffsetParseErrorOwned {

            }

    }

    #[derive(Clone, PartialEq)]

    pub enum CssStyleCompositeFilterParseError<'a> {

        Invalid(InvalidValueErr<'a>),

        Float(ParseFloatError),

        WrongNumberOfComponents {

            expected: usize,

            got: usize,

            input: &'a str,

        },

    }

    impl_debug_as_display!(CssStyleCompositeFilterParseError<'a>);

    impl_display! { CssStyleCompositeFilterParseError<'a>, {

        Invalid(s) => format!("Invalid composite operator: {}", s.0),

        Float(e) => format!("Error parsing floating-point value for arithmetic(): {}", e),

        WrongNumberOfComponents { expected, got, input } => format!("Expected {} components for arithmetic(), got {}: \"{}\"", expected, got, input),

    }}

    impl_from!(

        InvalidValueErr<'a>,

        CssStyleCompositeFilterParseError::Invalid

    );

    impl<'a> From<ParseFloatError> for CssStyleCompositeFilterParseError<'a> {

    }

    #[derive(Debug, Clone, PartialEq)]

    #[repr(C, u8)]

    pub enum CssStyleCompositeFilterParseErrorOwned {

        Invalid(InvalidValueErrOwned),

        Float(crate::props::basic::error::ParseFloatError),

        WrongNumberOfComponents(WrongComponentCountError),

    }

    impl<'a> CssStyleCompositeFilterParseError<'a> {

                }

            }

    }

    impl CssStyleCompositeFilterParseErrorOwned {

            }

    }

    // -- Parser Implementation --

    /// Parses a space-separated list of filter functions.

        }

    /// Parses one `function(...)` from the beginning of a string and returns the parsed

    /// filter and the rest of the string.

        }

    /// Parses a single filter function string, like `blur(5px)`.

                // CSS filter opacity must be between 0 and 1 (or 0% to 100%)

            }

            }

            }

            }

        }

        };

        }

                }

            }

        }

}

#[cfg(feature = "parser")]

pub use parser::{

    parse_style_filter_vec, CssStyleBlurParseError, CssStyleBlurParseErrorOwned,

    CssStyleColorMatrixParseError, CssStyleColorMatrixParseErrorOwned,

    CssStyleCompositeFilterParseError, CssStyleCompositeFilterParseErrorOwned,

    CssStyleFilterOffsetParseError, CssStyleFilterOffsetParseErrorOwned, CssStyleFilterParseError,

    CssStyleFilterParseErrorOwned,

};

#[cfg(all(test, feature = "parser"))]

mod tests {

    use super::*;

    use crate::props::style::filter::parser::parse_style_filter;

    #[test]

        // Blur

        // Blur with two values

        // Drop Shadow

        // Opacity

        // Flood

        // Composite

        // Offset

    #[test]

    #[test]

        } else {

        }

        } else {

        }

        } else {

        }

        } else {

        }

        } else {

        }

        } else {

        }

    #[test]

    #[test]

        // Invalid function name

        // Incorrect arguments

                                                                // Unclosed parenthesis

}