/// Tests [`SteppedVector`] to ensure everything works properly (helped me find a bunch of issues)
#[test]
fn stepped_vector() {
	use ytbn_graphing_software::SteppedVector;

	let min: i32 = -1000;
	let max: i32 = 1000;
	let data: Vec<f64> = (min..=max).map(|x| x as f64).collect();
	let len_data = data.len();
	let stepped_vector: SteppedVector = data.as_slice().into();

	assert_eq!(stepped_vector.get_min(), min as f64);
	assert_eq!(stepped_vector.get_max(), max as f64);

	assert_eq!(stepped_vector.get_index(&(min as f64)), Some(0));
	assert_eq!(stepped_vector.get_index(&(max as f64)), Some(len_data - 1));

	for i in min..=max {
		assert_eq!(
			stepped_vector.get_index(&(i as f64)),
			Some((i + min.abs()) as usize)
		);
	}

	assert_eq!(stepped_vector.get_index(&((min - 1) as f64)), None);
	assert_eq!(stepped_vector.get_index(&((max + 1) as f64)), None);
}

/// Ensures [`decimal_round`] returns correct values
#[test]
fn decimal_round() {
	use ytbn_graphing_software::decimal_round;

	assert_eq!(decimal_round(0.00001, 1), 0.0);
	assert_eq!(decimal_round(0.00001, 2), 0.0);
	assert_eq!(decimal_round(0.00001, 3), 0.0);
	assert_eq!(decimal_round(0.00001, 4), 0.0);
	assert_eq!(decimal_round(0.00001, 5), 0.00001);

	assert_eq!(decimal_round(0.12345, 1), 0.1);
	assert_eq!(decimal_round(0.12345, 2), 0.12);
	assert_eq!(decimal_round(0.12345, 3), 0.123);
	assert_eq!(decimal_round(0.12345, 4), 0.1235); // rounds up
	assert_eq!(decimal_round(0.12345, 5), 0.12345);

	assert_eq!(decimal_round(1.9, 0), 2.0);
	assert_eq!(decimal_round(1.9, 1), 1.9);
}

/// Tests [`resolution_helper`] to make sure it returns expected output
#[test]
fn resolution_helper() {
	use ytbn_graphing_software::resolution_helper;

	assert_eq!(
		resolution_helper(10, &1.0, &1.0),
		vec![1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0]
	);

	assert_eq!(
		resolution_helper(5, &-2.0, &1.0),
		vec![-2.0, -1.0, 0.0, 1.0, 2.0]
	);

	assert_eq!(resolution_helper(3, &-2.0, &1.0), vec![-2.0, -1.0, 0.0]);
}

/// Tests [`option_vec_printer`]
#[test]
fn option_vec_printer() {
	use std::collections::HashMap;
	use ytbn_graphing_software::option_vec_printer;

	let values_strings: HashMap<Vec<Option<&str>>, &str> = HashMap::from([
		(vec![None], "[None]"),
		(vec![Some("text"), None], "[text, None]"),
		(vec![None, None], "[None, None]"),
		(vec![Some("text1"), Some("text2")], "[text1, text2]"),
	]);

	for (key, value) in values_strings {
		assert_eq!(option_vec_printer(&key), value);
	}

	let values_nums = HashMap::from([
		(vec![Some(10)], "[10]"),
		(vec![Some(10), None], "[10, None]"),
		(vec![None, Some(10)], "[None, 10]"),
		(vec![Some(10), Some(100)], "[10, 100]"),
	]);

	for (key, value) in values_nums {
		assert_eq!(option_vec_printer(&key), value);
	}
}

#[test]
fn hashed_storage() {
	use ytbn_graphing_software::{hashed_storage_create, hashed_storage_read};

	let commit = "abcdefeg".chars().map(|c| c as u8).collect::<Vec<u8>>();
	let data = "really cool data"
		.chars()
		.map(|c| c as u8)
		.collect::<Vec<u8>>();
	let storage = hashed_storage_create(commit.as_slice(), data.as_slice());

	let read = hashed_storage_read(storage);
	assert_eq!(read.0.chars().map(|c| c as u8).collect::<Vec<u8>>(), commit);
	assert_eq!(read.1, data);
}

#[test]
fn format_bytes() {
	use std::collections::HashMap;
	use ytbn_graphing_software::format_bytes;

	let values: HashMap<usize, &str> = HashMap::from([(1000, "1000 B"), (10000, "10.00 KB")]);

	for (key, value) in values {
		assert_eq!(format_bytes(key), value);
	}
}