extern crate ssd1307fd;

use embedded_graphics::{
    mono_font::{ascii::FONT_6X10, MonoTextStyle},
    pixelcolor::BinaryColor,
    prelude::*,
    prelude::Point,
    prelude::Size,
    primitives::{
        Circle, PrimitiveStyle, PrimitiveStyleBuilder, Rectangle, StrokeAlignment, Triangle,
    },
    text::{Alignment, Text},
};

fn main() -> Result<(), std::convert::Infallible> {
    let mut display = ssd1307fd::Display::new("/dev/fb1").unwrap();

    // Create styles used by the drawing operations.
    let thin_stroke = PrimitiveStyle::with_stroke(BinaryColor::On, 1);
    let thick_stroke = PrimitiveStyle::with_stroke(BinaryColor::On, 3);
    let border_stroke = PrimitiveStyleBuilder::new()
        .stroke_color(BinaryColor::On)
        .stroke_width(3)
        .stroke_alignment(StrokeAlignment::Inside)
        .build();
    let fill = PrimitiveStyle::with_fill(BinaryColor::On);
    let character_style = MonoTextStyle::new(&FONT_6X10, BinaryColor::On);

    let yoffset = 14;

    // Draw a 3px wide outline around the display.
    display
        .bounding_box()
        .into_styled(border_stroke)
        .draw(&mut display)?;

    // Draw a triangle.
    Triangle::new(
        Point::new(16, 16 + yoffset),
        Point::new(16 + 16, 16 + yoffset),
        Point::new(16 + 8, yoffset),
    )
    .into_styled(thin_stroke)
    .draw(&mut display)?;

    // Draw a filled square
    Rectangle::new(Point::new(52, yoffset), Size::new(16, 16))
        .into_styled(fill)
        .draw(&mut display)?;

    // Draw a circle with a 3px wide stroke.
    Circle::new(Point::new(88, yoffset), 17)
        .into_styled(thick_stroke)
        .draw(&mut display)?;

    // Draw centered text.
    let text = "embedded-graphics";
    Text::with_alignment(
        text,
        display.bounding_box().center() + Point::new(0, 15),
        character_style,
        Alignment::Center,
    )
    .draw(&mut display)?;

    display.flush().unwrap();

    Ok(())
}