use std::{
    env::args,
    fs::{File, create_dir_all},
    io::{BufReader, Seek, SeekFrom},
};
use unity_tools::{
    classes::{FromValue, texture2d::Texture2d},
    object::read_value,
    serialized_file::read_serialized_file,
    unityfs::UnityFS,
};

fn main() -> anyhow::Result<()> {
    env_logger::init_from_env("LOG");
    let file = BufReader::new(File::open(args().nth(1).unwrap())?);
    let mut fs = UnityFS::open(file)?;

    let mut i = 0;
    create_dir_all("/tmp/tex").unwrap();
    for node in fs.nodes().to_vec() {
        if node.name.ends_with(".resource") || node.name.ends_with(".resS") {
            continue;
        }
        let mut cab = fs.read(&node)?;
        let file = read_serialized_file(&mut cab)?;
        for ob in file.objects {
            cab.seek(SeekFrom::Start(ob.data_offset))?;
            let typetree = if ob.type_id < 0 {
                unimplemented!()
            } else {
                &file.types[ob.type_id as usize]
            };
            if let Some(typetree) = &typetree.type_tree {
                if typetree.type_string != "Texture2D" {
                    continue;
                }
                let value = read_value(typetree, file.endianness, &mut cab)?;
                let texture = Texture2d::from_value(value).unwrap();
                if texture.image_data.len() > 0 {
                    let path = format!("/tmp/tex/{i}.png");
                    println!("{path}");
                    texture.to_image().unwrap().save(path).unwrap();
                    i += 1;
                }
            }
        }
    }

    Ok(())
}