/*
    Hurry Curry! - a game about cooking
    Copyright 2024 metamuffin

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, version 3 of the License only.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

*/
use clap::Parser;
use std::{
    collections::HashMap,
    fs::File,
    io::{BufWriter, Write},
    path::PathBuf,
    process::exit,
};

#[derive(Parser)]
struct Args {
    input: PathBuf,
    output: PathBuf,
}

fn main() {
    let Args { input, output } = Args::parse();

    let palette = include_str!("../../../assets/palette.csv")
        .split('\n')
        .filter(|l| !l.is_empty())
        .map(|s| {
            let (c, s) = s.split_once(",").unwrap();
            let (r, s) = s.split_once(",").unwrap();
            let (g, s) = s.split_once(",").unwrap();
            let (b, a) = s.split_once(",").unwrap();
            (
                [
                    r.parse().unwrap(),
                    g.parse().unwrap(),
                    b.parse().unwrap(),
                    a.parse().unwrap(),
                ],
                c.chars().next().unwrap(),
            )
        })
        .collect::<HashMap<_, _>>();

    let input = image::open(input).unwrap().to_rgba8();
    let mut output = BufWriter::new(File::create(output).unwrap());

    for y in 0..input.height() {
        for x in 0..input.width() {
            let mut c = input.get_pixel(x, y).0;
            if c[3] == 0 {
                c = [0, 0, 0, 0];
            }
            let Some(char) = palette.get(&c) else {
                eprintln!("color at {x},{y} not in palette: {c:?}");
                exit(1);
            };
            write!(output, "{char}").unwrap();
        }
        writeln!(output).unwrap();
    }
    output.flush().unwrap();
    output.into_inner().unwrap().flush().unwrap()
}