use macroquad::prelude::*;
use macroquad::rand;

#[macroquad::main("MyGame")]
async fn main() {
    let mut rand_name = String::from("Random bangalore area names");
    let mut last_update = 0.0;
    loop {
        clear_background(WHITE);
        write_name(&rand_name);
        let t = get_time();
        if t - last_update > 1.75 {
            rand_name = random_name();
            last_update = get_time();
        }
        next_frame().await
    }
}

fn write_name(random_name: &str) {
    let font_size = 40.0;
    let width = screen_width();
    let height = screen_height();
    let text_dimensions = measure_text(random_name, None, font_size as u16, 1.0);
    draw_text(
        &random_name,
        (width - text_dimensions.width) / 2.,
        (height - text_dimensions.height) / 2.,
        font_size,
        DARKGRAY,
    );
}

fn random_name() -> String {
    let prefix = read_segments(include_str!("./data/prefix.txt"));
    let mid = read_segments(include_str!("./data/mid.txt"));
    let suffix = read_segments(include_str!("./data/suffix.txt"));

    format!(
        "{}{}{}",
        choose_random(&prefix),
        choose_random(&mid),
        choose_random(&suffix)
    )
}

fn choose_random(prefix: &[&str]) -> String {
    let idx = rand::gen_range(0, prefix.len());
    match prefix.get(idx) {
        Some(&name) => name.to_string(),
        None => String::new(),
    }
}

fn read_segments(file_contents: &str) -> Vec<&str> {
    file_contents.lines().collect::<Vec<_>>()
}