use std::str;

extern crate clerk;
extern crate sysfs_gpio;

use clerk::{CursorBlinking, CursorState, DataPins4Lines, DefaultLines, Display,
            DisplayControlBuilder, DisplayState, FunctionSetBuilder, Pins, SeekFrom};

mod utils;
use utils::ExternPin;
use utils::CustomDelay;

fn main() {
    let pins = Pins {
        register_select: ExternPin::new(2),
        read: ExternPin::new(3),
        enable: ExternPin::new(4),
        data: DataPins4Lines {
            data4: ExternPin::new(16),
            data5: ExternPin::new(19),
            data6: ExternPin::new(26),
            data7: ExternPin::new(20),
        },
    };

    let mut lcd: Display<_, DefaultLines> = Display::new(pins.into_connection::<CustomDelay>());

    lcd.init(&FunctionSetBuilder::default());

    lcd.set_display_control(
        DisplayControlBuilder::default()
            .set_display(DisplayState::On)
            .set_cursor(CursorState::Off)
            .set_cursor_blinking(CursorBlinking::On),
    );

    lcd.seek_cgram(SeekFrom::Home(0));
    let character = [
        0b0_1110,
        0b1_0101,
        0b1_1111,
        0b1_0101,
        0b0_1110,
        0b0_0100,
        0b0_0100,
        0b1_1111,
    ];
    lcd.write_message(str::from_utf8(&character).unwrap());

    lcd.seek_cgram(SeekFrom::Home(0));
    println!("Created custom char is: ");
    for _ in 0..8 {
        let value = lcd.read_byte();
        println!("{:#08b}", value)
    }

    lcd.seek(SeekFrom::Home(0));
    lcd.write(0);
}