// SPDX-License-Identifier: MIT OR Apache-2.0

pub use fontdb::{Family, Stretch, Style, Weight};

#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub struct Color(pub u32);

impl Color {
    pub const fn rgb(r: u8, g: u8, b: u8) -> Self {
        Self::rgba(r, g, b, 0xFF)
    }

    pub const fn rgba(r: u8, g: u8, b: u8, a: u8) -> Self {
        Self(
            ((a as u32) << 24) |
            ((r as u32) << 16) |
            ((g as u32) << 8) |
            (b as u32)
        )
    }
}

#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub struct Attrs<'a> {
    //TODO: should this be an option?
    pub color_opt: Option<Color>,
    pub family: Family<'a>,
    pub monospaced: bool,
    pub stretch: Stretch,
    pub style: Style,
    pub weight: Weight,
}

impl<'a> Attrs<'a> {
    pub fn new() -> Self {
        Self {
            color_opt: None,
            family: Family::SansSerif,
            monospaced: false,
            stretch: Stretch::Normal,
            style: Style::Normal,
            weight: Weight::NORMAL,
        }
    }

    pub fn color(mut self, color: Color) -> Self {
        self.color_opt = Some(color);
        self
    }

    pub fn family(mut self, family: Family<'a>) -> Self {
        self.family = family;
        self
    }

    pub fn monospaced(mut self, monospaced: bool) -> Self {
        self.monospaced = monospaced;
        self
    }

    pub fn stretch(mut self, stretch: Stretch) -> Self {
        self.stretch = stretch;
        self
    }

    pub fn style(mut self, style: Style) -> Self {
        self.style = style;
        self
    }

    pub fn weight(mut self, weight: Weight) -> Self {
        self.weight = weight;
        self
    }

    pub fn matches(&self, face: &fontdb::FaceInfo) -> bool {
        face.style == self.style &&
        face.weight == self.weight &&
        face.stretch == self.stretch &&
        //TODO: smarter way of including emoji
        (face.monospaced == self.monospaced || face.post_script_name.contains("Emoji"))
    }
}

pub struct AttrsSpan<'a> {
    pub start: usize,
    pub end: usize,
    pub attrs: Attrs<'a>
}