#[macro_export]
macro_rules! load_test {
    ( $path:expr ) => {{
        let path = format!("{}/{}", env!("CARGO_MANIFEST_DIR"), $path);
        let raw = std::fs::read_to_string(&path).unwrap_or_else(|err| {
            panic!("Couldn't load {}: {}", &path, err);
        });
        let world: stackline::prelude::World =
            serde_json::from_str(&raw).expect("Couldn't parse World");
        world
    }};
}

#[macro_export]
macro_rules! run {
    ( $world:expr ) => {
        $world.step();
    };

    ( $world:expr, $steps:expr ) => {
        for _step in 0..$steps {
            $world.step();
        }
    };
}

#[macro_export]
macro_rules! assert_signal {
    ( $world:expr, $x:expr, $y:expr ) => {{
        let guard = $world
            .get(($x, $y))
            .unwrap_or_else(|| panic!("Couldn't get tile at {}:{}", $x, $y));
        let signal = guard.signal();

        assert!(
            signal.is_some(),
            "Expected signal at {}:{}!\n{}",
            $x,
            $y,
            $world
        );

        signal.unwrap()
    }};

    ( $world:expr, $x:expr, $y:expr, $signal:expr ) => {{
        let signal = assert_signal!($world, $x, $y);
        assert_eq!(signal, $signal);
    }};
}

#[macro_export]
macro_rules! assert_no_signal {
    ( $world:expr, $x:expr, $y:expr ) => {{
        let guard = $world
            .get(($x, $y))
            .unwrap_or_else(|| panic!("Couldn't get tile at {}:{}", $x, $y));
        let signal = guard.signal();

        assert!(
            signal.is_none(),
            "Expected no signal at {}:{}!\n{}",
            $x,
            $y,
            $world
        );
    }};
}

#[macro_export]
macro_rules! assert_stored {
    ( $world:expr, $x:expr, $y:expr ) => {{
        let guard = $world
            .get_as::<stackline::tile::Store>(($x, $y))
            .unwrap_or_else(|| panic!("Couldn't get store tile at {}:{}", $x, $y));
        let signal = guard.signal().cloned();

        assert!(
            signal.is_some(),
            "Expected stored signal at {}:{}!\n{}",
            $x,
            $y,
            $world
        );

        signal.unwrap()
    }};

    ( $world:expr, $x:expr, $y:expr, $signal:expr ) => {{
        let signal = assert_stored!($world, $x, $y);
        assert_eq!(
            signal,
            $signal,
            concat!("Expected stored signal at {}:{} to be equal to ", stringify!($signal), "!\n{}"),
            $x,
            $y,
            $world
        );
    }};
}

#[macro_export]
macro_rules! assert_no_stored {
    ( $world:expr, $x:expr, $y:expr ) => {{
        let guard = $world
            .get_as::<stackline::tile::Store>(($x, $y))
            .unwrap_or_else(|| panic!("Couldn't get store tile at {}:{}", $x, $y));
        let signal = guard.signal();

        assert!(
            signal.is_none(),
            "Expected no stored signal at {}:{}!\n{}",
            $x,
            $y,
            $world
        );
    }};
}

#[macro_export]
macro_rules! assert_display_eq {
    ( $world:expr, $path:expr ) => {{
        use std::fmt::Write;

        let actual = format!("{:#}", $world);
        let path = $path;
        let expected = std::fs::read_to_string(&path).unwrap_or_else(|err| {
            panic!("Couldn't read {}: {}", path, err);
        });

        let mut actual_trimmed = String::new();
        for line in actual.lines() {
            write!(&mut actual_trimmed, "{}\n", line.trim_end()).unwrap();
        }

        assert_eq!(actual_trimmed.trim_end(), expected.trim_end());
    }};
}