// Safe application-level UI model. Rendering is provided by the proprietary Agila runtime.
module agila

pub struct Color {
pub:
    r u8
    g u8
    b u8
    a u8 = 255
}

pub fn rgb(hex u32) Color {
    return Color{
        r: u8((hex >> 16) & 0xff)
        g: u8((hex >> 8) & 0xff)
        b: u8(hex & 0xff)
    }
}

pub struct Theme {
pub:
    background Color
    surface Color
    text Color
    accent Color
}

pub fn default_theme() Theme {
    return Theme{
        background: rgb(0x08080e)
        surface: rgb(0x171827)
        text: rgb(0xf5f1ff)
        accent: rgb(0xc084fc)
    }
}

pub interface Widget {
    describe() string
}

pub struct Text {
pub:
    value string
}

pub fn (t Text) describe() string { return 'Text(${t.value})' }

pub struct Button {
pub:
    label string
}

pub fn (b Button) describe() string { return 'Button(${b.label})' }

pub struct Column {
pub:
    children []Widget
}

pub fn (c Column) describe() string { return 'Column(${c.children.len} children)' }

pub fn preview(widget Widget) {
    println('[Agila SDK sandbox UI] ${widget.describe()}')
}