import semver

struct TestVersion {
	raw        string
	major      int
	minor      int
	patch      int
	prerelease string
	metadata   string
}

struct TestRange {
	raw_version       string
	range_satisfied   string
	range_unsatisfied string
}

struct TestCoerce {
	invalid string
	valid   string
}

const versions_to_test = [
	TestVersion{'1.2.4', 1, 2, 4, '', ''},
	TestVersion{'1.2.4-prerelease-1', 1, 2, 4, 'prerelease-1', ''},
	TestVersion{'1.2.4+20191231', 1, 2, 4, '', '20191231'},
	TestVersion{'1.2.4-prerelease-1+20191231', 1, 2, 4, 'prerelease-1', '20191231'},
	TestVersion{'1.2.4+20191231-prerelease-1', 1, 2, 4, '', '20191231-prerelease-1'},
]
const ranges_to_test = [
	TestRange{'1.1.0', '1.1.0', '1.1.1'},
	TestRange{'1.1.0', '=1.1.0', '=1.1.1'},
	TestRange{'1.1.0', '>=1.0.0', '<1.1.0'},
	TestRange{'1.1.0', '>=1.0.0 <=1.1.0', '>=1.0.0 <1.1.0'},
	TestRange{'2.3.1', '>=1.0.0 <=1.1.0 || >2.0.0 <2.3.4', '>=1.0.0 <1.1.0'},
	TestRange{'2.3.1', '>=1.0.0 <=1.1.0 || >2.0.0 <2.3.4', '>=1.0.0 <1.1.0 || >4.0.0 <5.0.0'},
	TestRange{'2.3.1', '~2.3.0', '~2.4.0'},
	TestRange{'3.0.0', '~3.0.0', '~4.0.0'},
	TestRange{'2.3.1', '^2.0.0', '^2.4.0'},
	TestRange{'0.3.1', '^0.3.0', '^2.4.0'},
	TestRange{'0.0.4', '^0.0.1', '^0.1.0'},
	TestRange{'2.3.4', '^0.0.1 || ^2.3.0', '^3.1.0 || ^4.2.0'},
	TestRange{'2.3.4', '>2 || <3', '>3 || >4'},
	TestRange{'2.3.4', '2.3.4 - 2.3.5', '2.5.1 - 2.8.3'},
	TestRange{'2.3.4', '2.2 - 2.3', '2.4 - 2.8'},
	TestRange{'2.3.4', '2.3.x', '2.4.x'},
	TestRange{'2.3.4', '2.x', '3.x'},
	TestRange{'2.3.4', '*', '3.x'},
]
const coerce_to_test = [
	TestCoerce{'1.2.0.4', '1.2.0'},
	TestCoerce{'1.2.0', '1.2.0'},
	TestCoerce{'1.2', '1.2.0'},
	TestCoerce{'1', '1.0.0'},
	TestCoerce{'1-alpha', '1.0.0-alpha'},
	TestCoerce{'1+meta', '1.0.0+meta'},
	TestCoerce{'1-alpha+meta', '1.0.0-alpha+meta'},
]
const invalid_versions_to_test = [
	'a.b.c',
	'1.2',
	'1.2.x',
	'1.2.3.4',
	'1.2.3-alpha@',
	'1.2.3+meta%',
]
const invalid_ranges_to_test = [
	'^a',
	'~b',
	'a - c',
	'>a',
	'a',
	'a.x',
]

fn test_from() {
	for item in versions_to_test {
		ver := semver.from(item.raw) or {
			assert false
			return
		}
		assert ver.major == item.major
		assert ver.minor == item.minor
		assert ver.patch == item.patch
		assert ver.metadata == item.metadata
		assert ver.prerelease == item.prerelease
		assert ver.str() == item.raw
	}
	for ver in invalid_versions_to_test {
		semver.from(ver) or {
			assert true
			continue
		}
		assert false
	}
}

fn test_increment() {
	version1 := semver.build(1, 2, 3)
	version1_inc := version1.increment(.major)
	assert version1_inc.major == 2
	assert version1_inc.minor == 0
	assert version1_inc.patch == 0
	version2_inc := version1.increment(.minor)
	assert version2_inc.major == 1
	assert version2_inc.minor == 3
	assert version2_inc.patch == 0
	version3_inc := version1.increment(.patch)
	assert version3_inc.major == 1
	assert version3_inc.minor == 2
	assert version3_inc.patch == 4
}

fn test_compare() {
	first := semver.build(1, 0, 0)
	patch := semver.build(1, 0, 1)
	minor := semver.build(1, 2, 3)
	major := semver.build(2, 0, 0)
	assert first <= first
	assert first >= first
	assert !(first < first)
	assert !(first > first)
	assert patch > first
	assert first <= patch
	assert !(first >= patch)
	assert !(patch <= first)
	assert patch > first
	assert first < patch
	assert !(first > patch)
	assert !(patch < first)
	assert minor > patch
	assert patch < minor
	assert !(patch > minor)
	assert !(minor < patch)
	assert major > minor
	assert minor < major
	assert !(minor > major)
	assert !(major < minor)
}

fn test_satisfies() {
	for item in ranges_to_test {
		ver := semver.from(item.raw_version) or {
			assert false
			return
		}
		assert ver.satisfies(item.range_satisfied)
		assert !ver.satisfies(item.range_unsatisfied)
	}
}

fn test_satisfies_invalid() {
	ver := semver.from('1.0.0') or {
		assert false
		return
	}
	for item in invalid_ranges_to_test {
		assert ver.satisfies(item) == false
	}
}

fn test_coerce() {
	for item in coerce_to_test {
		valid := semver.from(item.valid) or {
			assert false
			return
		}
		fixed := semver.coerce(item.invalid) or {
			assert false
			return
		}
		assert fixed == valid
	}
}

fn test_coerce_invalid() {
	semver.coerce('a') or {
		assert true
		return
	}
	assert false
}

fn test_is_valid() {
	for item in versions_to_test {
		assert semver.is_valid(item.raw)
	}
	for item in invalid_versions_to_test {
		assert semver.is_valid(item) == false
	}
}