use std::num::{NonZeroI32, NonZeroI64};

use snapbox::{assert_eq, file};
use watchexec_events::{
	filekind::{CreateKind, FileEventKind as EventKind, ModifyKind, RemoveKind, RenameMode},
	Event, FileType, Keyboard, ProcessEnd, Source, Tag,
};
use watchexec_signals::Signal;

fn parse_file(path: &str) -> Vec<Event> {
	serde_json::from_str(&std::fs::read_to_string(path).unwrap()).unwrap()
}

#[test]
fn single() {
	let single = Event {
		tags: vec![Tag::Source(Source::Internal)],
		metadata: Default::default(),
	};

	assert_eq(
		file!["snapshots/single.json"],
		serde_json::to_string_pretty(&single).unwrap(),
	);

	assert_eq!(
		serde_json::from_str::<Event>(
			&std::fs::read_to_string("tests/snapshots/single.json").unwrap()
		)
		.unwrap(),
		single
	);
}

#[test]
fn array() {
	let array = &[
		Event {
			tags: vec![Tag::Source(Source::Internal)],
			metadata: Default::default(),
		},
		Event {
			tags: vec![
				Tag::ProcessCompletion(Some(ProcessEnd::Success)),
				Tag::Process(123),
			],
			metadata: Default::default(),
		},
		Event {
			tags: vec![Tag::Keyboard(Keyboard::Eof)],
			metadata: Default::default(),
		},
	];

	assert_eq(
		file!["snapshots/array.json"],
		serde_json::to_string_pretty(array).unwrap(),
	);

	assert_eq!(parse_file("tests/snapshots/array.json"), array);
}

#[test]
fn metadata() {
	let metadata = &[Event {
		tags: vec![Tag::Source(Source::Internal)],
		metadata: [
			("Dafan".into(), vec!["Mountain".into()]),
			("Lan".into(), vec!["Zhan".into()]),
		]
		.into(),
	}];

	assert_eq(
		file!["snapshots/metadata.json"],
		serde_json::to_string_pretty(metadata).unwrap(),
	);

	assert_eq!(parse_file("tests/snapshots/metadata.json"), metadata);
}

#[test]
fn asymmetric() {
	// asymmetric because these have information loss or missing fields

	assert_eq!(
		parse_file("tests/snapshots/asymmetric.json"),
		&[
			Event {
				tags: vec![
					// no filetype field
					Tag::Path {
						path: "/foo/bar/baz".into(),
						file_type: None
					},
					// fs with only simple representation
					Tag::FileEventKind(EventKind::Create(CreateKind::Any)),
					// unparsable of a known kind
					Tag::Unknown,
				],
				metadata: Default::default(),
			},
			Event {
				tags: vec![
					// no simple field
					Tag::FileEventKind(EventKind::Modify(ModifyKind::Other)),
					// no disposition field
					Tag::ProcessCompletion(None)
				],
				metadata: Default::default(),
			},
		]
	);
}

#[test]
fn sources() {
	let sources = vec![
		Event {
			tags: vec![
				Tag::Source(Source::Filesystem),
				Tag::Source(Source::Keyboard),
				Tag::Source(Source::Mouse),
			],
			metadata: Default::default(),
		},
		Event {
			tags: vec![
				Tag::Source(Source::Os),
				Tag::Source(Source::Time),
				Tag::Source(Source::Internal),
			],
			metadata: Default::default(),
		},
	];

	assert_eq(
		file!["snapshots/sources.json"],
		serde_json::to_string_pretty(&sources).unwrap(),
	);

	assert_eq!(parse_file("tests/snapshots/sources.json"), sources);
}

#[test]
fn signals() {
	let signals = vec![
		Event {
			tags: vec![
				Tag::Signal(Signal::Interrupt),
				Tag::Signal(Signal::User1),
				Tag::Signal(Signal::ForceStop),
			],
			metadata: Default::default(),
		},
		Event {
			tags: vec![
				Tag::Signal(Signal::Custom(66)),
				Tag::Signal(Signal::Custom(0)),
			],
			metadata: Default::default(),
		},
	];

	assert_eq(
		file!["snapshots/signals.json"],
		serde_json::to_string_pretty(&signals).unwrap(),
	);

	assert_eq!(parse_file("tests/snapshots/signals.json"), signals);
}

#[test]
fn completions() {
	let completions = vec![
		Event {
			tags: vec![
				Tag::ProcessCompletion(None),
				Tag::ProcessCompletion(Some(ProcessEnd::Success)),
				Tag::ProcessCompletion(Some(ProcessEnd::Continued)),
			],
			metadata: Default::default(),
		},
		Event {
			tags: vec![
				Tag::ProcessCompletion(Some(ProcessEnd::ExitError(NonZeroI64::new(12).unwrap()))),
				Tag::ProcessCompletion(Some(ProcessEnd::ExitSignal(Signal::Interrupt))),
				Tag::ProcessCompletion(Some(ProcessEnd::ExitSignal(Signal::Custom(34)))),
				Tag::ProcessCompletion(Some(ProcessEnd::ExitStop(NonZeroI32::new(56).unwrap()))),
				Tag::ProcessCompletion(Some(ProcessEnd::Exception(NonZeroI32::new(78).unwrap()))),
			],
			metadata: Default::default(),
		},
	];

	assert_eq(
		file!["snapshots/completions.json"],
		serde_json::to_string_pretty(&completions).unwrap(),
	);

	assert_eq!(parse_file("tests/snapshots/completions.json"), completions);
}

#[test]
fn paths() {
	let paths = vec![
		Event {
			tags: vec![
				Tag::Path {
					path: "/foo/bar/baz".into(),
					file_type: Some(FileType::Symlink),
				},
				Tag::FileEventKind(EventKind::Create(CreateKind::File)),
			],
			metadata: Default::default(),
		},
		Event {
			tags: vec![
				Tag::Path {
					path: "/rename/from/this".into(),
					file_type: Some(FileType::File),
				},
				Tag::Path {
					path: "/rename/into/that".into(),
					file_type: Some(FileType::Other),
				},
				Tag::FileEventKind(EventKind::Modify(ModifyKind::Name(RenameMode::Both))),
			],
			metadata: Default::default(),
		},
		Event {
			tags: vec![
				Tag::Path {
					path: "/delete/this".into(),
					file_type: Some(FileType::Dir),
				},
				Tag::Path {
					path: "/".into(),
					file_type: None,
				},
				Tag::FileEventKind(EventKind::Remove(RemoveKind::Any)),
			],
			metadata: Default::default(),
		},
	];

	assert_eq(
		file!["snapshots/paths.json"],
		serde_json::to_string_pretty(&paths).unwrap(),
	);

	assert_eq!(parse_file("tests/snapshots/paths.json"), paths);
}