use flate2::write::{GzEncoder, GzDecoder};
use flate2::Compression;
use std::io::prelude::*;
use gemma::chip8::computer::Chip8Computer;

fn load_result(to_load: &str) -> String {
    std::fs::read_to_string(format!("resources/test/state/{}", to_load)).unwrap()
}

fn load_compressed_result(to_load: &str) -> String {
    // load the file...
    // ...then uncompress the string.
    let mut decoder = GzDecoder::new(Vec::new());
    decoder.write_all(load_result(to_load).as_ref()).expect("Decompression failed");
    let decompressed_data = decoder.finish().expect("Failed to finish decompression");
    String::from_utf8(decompressed_data).expect("Invalid UTF-8")
}

fn load_rom(to_load: &str) -> Vec<u8> {
    std::fs::read(format!("resources/roms/{}", to_load)).unwrap()
}
#[test]
fn smoke_round_trip_serialize_deserialize() {
    let x = Chip8Computer::new();
    let expected_string = load_result("smoke_001_round_trip_serialize_deserialize.json");
    let serialized = serde_json::to_string(&x).unwrap();
    let deserialized: Chip8Computer = serde_json::from_str(&expected_string).unwrap();
    println!("SERIALIZED [{}]", serialized);
    // TODO: using trim here is a hack to handle editors adding a newline at the end of a file...even a 1 line file
    assert_eq!(serialized.trim(), expected_string.trim());
    assert_eq!(deserialized, x);
}

#[test]
fn computer_001_system_zero_state() {
    let x = Chip8Computer::new();
    let expected_string = load_compressed_result("smoke_002_round_trip_serialize_deserialize.tflt");
    let serialized = serde_json::to_string(&x).unwrap();

}