/main.rs at main

use rand::seq::SliceRandom;
use rand::Rng;
use rand_xoshiro::rand_core::SeedableRng;
use rand_xoshiro::Xoshiro256PlusPlus;
use std::collections::HashMap;
use std::fs::File;
use std::io::Write;

fn main() -> std::io::Result<()> {
    // This should have been a Python script, but Rust is more of a meme
    // The ASCII art contains 60 .s and 40 |s while the rest of the puzzle contains an equal number of both
    // Indicating that the message is hidden in the "missing" .s
    // Similar to https://puzzling.stackexchange.com/questions/126316/equilateral-figure which independently came up with a slightly similar idea
    let header = r#"
     db         db
    dpqb       dp8b
    8b qb_____dp_88
    88/ .        `p
    q'.            \
   .'.  .-.    ,-.  `--.
   |.  / 0 \  / 0 \ |   \
   |:  `.__   ___.' | \\/
   |.       "       | (
    \.    `-'-'    ,' |
   _/`------------'. .|
  /.  \\::(::[];)||:. \
 /.  ' \.`:;;;;'''/`. .|
|.   |/ `;--._.__/  |..|
|:  _/_,'''',,`.    `:.'
|.     ` / ,  ',`.   |/
 \.   -'/\/     ',\  |\
  /\__-' /\ /     ,: |.\
 /. .|  '  /-.    ,: |..\
:.  .|    /| | ,  ,||: ..:
|.  .`     | '//` ,:|:  :|
|..  .\      //\/ ,|:  ..|
 \.   .\     <./  ,'. ../
  \_ ,..`.__    _,..,._/
    `\|||/  `--'\|||/'"#;

    let letters = HashMap::from([
        (
            'A',
            "0000000000
0000110000
0001001000
0001001000
0010000100
0011111100
0010000100
0100000010
0100000010
0000000000",
        ),
        (
            'D',
            "0000000000
0011110000
0010001000
0010000100
0010000100
0010000100
0010000100
0010001000
0011110000
0000000000",
        ),
        (
            'F',
            "0000000000
0011111110
0010000000
0010000000
0010000000
0011111110
0010000000
0010000000
0010000000
0000000000",
        ),
        (
            'H',
            "0000000000
0010000100
0010000100
0010000100
0010000100
0011111100
0010000100
0010000100
0010000100
0000000000",
        ),
        (
            'I',
            "0000000000
0111111100
0000100000
0000100000
0000100000
0000100000
0000100000
0000100000
0111111100
0000000000",
        ),
        (
            'L',
            "0000000000
0010000000
0010000000
0010000000
0010000000
0010000000
0010000000
0011111110
0011111110
0000000000",
        ),
        (
            'O',
            "0000000000
0001111000
0010000100
0100000010
0100000010
0100000010
0100000010
0010000100
0001111000
0000000000",
        ),
        (
            'P',
            "0000000000
0011111000
0010000100
0010000100
0010000100
0011111100
0010000000
0010000000
0010000000
0000000000",
        ),
        (
            'R',
            "0000000000
0011110000
0010001000
0010000100
0010001000
0011110000
0010100000
0010010000
0010001000
0000000000",
        ),
        (
            'S',
            "0000000000
0001111000
0010000100
0010000000
0011100000
0000111000
0000000100
0010000100
0001111000
0000000000",
        ),
        (
            'Y',
            "0000000000
0110000110
0110000110
0010000100
0001001000
0000110000
0000110000
0000110000
0000110000
0000000000",
        ),
        (
            '0',
            "0000000000
0001111000
0010000100
0100000010
0100000010
0100000010
0100000010
0010000100
0001111000
0000000000",
        ),
        (
            '1',
            "0000000000
0000110000
0001110000
0010110000
0000110000
0000110000
0000110000
0000110000
0001111000
0000000000",
        ),
        (
            '2',
            "0000000000
0001111000
0010000100
0010000010
0000000100
0000001000
0000010000
0001100000
0011111110
0000000000",
        ),
        (
            '4',
            "0000000000
0000011000
0000101000
0001001000
0010001000
0100001000
0111111110
0000001000
0000001000
0000000000",
        ),
        (
            '🙂',
            "0000000000
0000000000
0011001100
0011001100
0000000000
0100000010
0100000010
0011001100
0001111000
0000000000",
        ),
    ]);
    let ans = "HAPPYAPRILFOOLSDAY202441🙂";
    let mut rng = Xoshiro256PlusPlus::seed_from_u64(202441);
    let mut file = File::create("index.html")?;
    writeln!(file, "<!DOCTYPE html><!--{}-->", header)?;
    for c in ans.chars() {
        let letter = letters[&c].chars();
        let mut zeros = letter
            .enumerate()
            .filter(|(_, c)| matches!(c, '0'))
            .map(|(i, _)| i)
            .collect::<Vec<_>>();
        zeros.shuffle(&mut rng);
        let mut cnt = 0;
        for i in zeros {
            cnt += 1;
            writeln!(
                file,
                "<div style='color:white;position:absolute;top:{}px;left:{}px'>{}</div>",
                ((i / 11) as f32 + rng.gen_range(0.15..0.85)) * 50.0,
                ((i % 11) as f32 + rng.gen_range(0.15..0.85)) * 50.0,
                if cnt % 2 == 0 { "|" } else { "." }
            )?;
        }
    }
    Ok(())
}