#![allow(clippy::useless_conversion)]
#![allow(clippy::unnecessary_cast)]

use std::collections::{BTreeSet, HashSet};

use comparable::{assert_changes, Changed::*, I32Change, SetChange, VecChange};

#[test]
fn test_vec() {
	assert_changes!(&(vec![] as Vec<i32>), &vec![], Unchanged);
	assert_changes!(
		&vec![],
		&vec![1 as i32, 2, 3],
		Changed(vec![VecChange::Added(0, 1), VecChange::Added(1, 2), VecChange::Added(2, 3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3],
		&vec![],
		Changed(vec![VecChange::Removed(0, 1), VecChange::Removed(1, 2), VecChange::Removed(2, 3),]),
	);
	assert_changes!(&vec![1 as i32, 2], &vec![1 as i32, 2, 3], Changed(vec![VecChange::Added(2, 3)]),);
	assert_changes!(&vec![1 as i32, 2, 3], &vec![1 as i32, 2], Changed(vec![VecChange::Removed(2, 3)]),);
	assert_changes!(
		&vec![1 as i32, 3],
		&vec![1 as i32, 2, 3],
		Changed(vec![VecChange::Changed(1, I32Change(3, 2)), VecChange::Added(2, 3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3],
		&vec![1 as i32, 3],
		Changed(vec![VecChange::Changed(1, I32Change(2, 3)), VecChange::Removed(2, 3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3],
		&vec![1 as i32, 4, 3],
		Changed(vec![VecChange::Changed(1, I32Change(2, 4))]),
	);
}

#[test]
fn test_hashset() {
	assert_changes!(&(vec![] as Vec<i32>), &vec![], Unchanged);
	assert_changes!(
		&vec![].into_iter().collect::<HashSet<_>>(),
		&vec![1 as i32, 2, 3].into_iter().collect::<HashSet<_>>(),
		Changed(vec![SetChange::Added(1), SetChange::Added(2), SetChange::Added(3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<HashSet<_>>(),
		&vec![].into_iter().collect::<HashSet<_>>(),
		Changed(vec![SetChange::Removed(1), SetChange::Removed(2), SetChange::Removed(3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2].into_iter().collect::<HashSet<_>>(),
		&vec![1 as i32, 2, 3].into_iter().collect::<HashSet<_>>(),
		Changed(vec![SetChange::Added(3)]),
	);
	assert_changes!(
		&vec![1 as i32, 3].into_iter().collect::<HashSet<_>>(),
		&vec![1 as i32, 2, 3].into_iter().collect::<HashSet<_>>(),
		Changed(vec![SetChange::Added(2)]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<HashSet<_>>(),
		&vec![1 as i32, 3].into_iter().collect::<HashSet<_>>(),
		Changed(vec![SetChange::Removed(2)]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<HashSet<_>>(),
		&vec![1 as i32, 4, 3].into_iter().collect::<HashSet<_>>(),
		Changed(vec![SetChange::Added(4), SetChange::Removed(2)]),
	);
}

#[test]
fn test_btreeset() {
	assert_changes!(&(vec![] as Vec<i32>), &vec![], Unchanged);
	assert_changes!(
		&vec![].into_iter().collect::<BTreeSet<_>>(),
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Added(1), SetChange::Added(2), SetChange::Added(3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		&vec![].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Removed(1), SetChange::Removed(2), SetChange::Removed(3),]),
	);
	assert_changes!(
		&vec![1 as i32, 2].into_iter().collect::<BTreeSet<_>>(),
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Added(3)]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		&vec![1 as i32, 2].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Removed(3)]),
	);
	assert_changes!(
		&vec![1 as i32, 3].into_iter().collect::<BTreeSet<_>>(),
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Added(2)]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		&vec![1 as i32, 3].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Removed(2)]),
	);
	assert_changes!(
		&vec![1 as i32, 2, 3].into_iter().collect::<BTreeSet<_>>(),
		&vec![1 as i32, 4, 3].into_iter().collect::<BTreeSet<_>>(),
		Changed(vec![SetChange::Added(4), SetChange::Removed(2)]),
	);
}