package semver

import (
	"regexp"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestSemverRegexpCompiles(t *testing.T) {
	_, err := regexp.Compile(SemverRegexpString)
	assert.NoError(t, err)
}

func TestSemverRegexp(t *testing.T) {
	// taken from the official regexp provided by semver.org
	// https://www.regexpal.com/103662
	tests := []struct {
		inputs   []string
		expected error
	}{
		{
			inputs: []string{
				"0.0.4",
				"1.2.3",
				"10.20.30",
				"1.1.2-prerelease+meta",
				"1.1.2+meta",
				"1.1.2+meta-valid",
				"1.0.0-alpha",
				"1.0.0-beta",
				"1.0.0-alpha.beta",
				"1.0.0-alpha.beta.1",
				"1.0.0-alpha.1",
				"1.0.0-alpha0.valid",
				"1.0.0-alpha.0valid",
				"1.0.0-alpha-a.b-c-somethinglong+build.1-aef.1-its-okay",
				"1.0.0-rc.1+build.1",
				"2.0.0-rc.1+build.123",
				"1.2.3-beta",
				"10.2.3-DEV-SNAPSHOT",
				"1.2.3-SNAPSHOT-123",
				"1.0.0",
				"2.0.0",
				"1.1.7",
				"2.0.0+build.1848",
				"2.0.1-alpha.1227",
				"1.0.0-alpha+beta",
				"1.2.3----RC-SNAPSHOT.12.9.1--.12+788",
				"1.2.3----R-S.12.9.1--.12+meta",
				"1.2.3----RC-SNAPSHOT.12.9.1--.12",
				"1.0.0+0.build.1-rc.10000aaa-kk-0.1",
				"99999999999999999999999.999999999999999999.99999999999999999",
			},
			expected: nil,
		},
		{
			inputs: []string{
				"1",
				"1.2",
				"1.2.3-0123",
				"1.2.3-0123.0123",
				"1.1.2+.123",
				"+invalid",
				"-invalid",
				"-invalid+invalid",
				"-invalid.01",
				"alpha",
				"alpha.beta",
				"alpha.beta.1",
				"alpha.1",
				"alpha+beta",
				"alpha_beta",
				"alpha.",
				"alpha..",
				"beta\\",
				"1.0.0-alpha_beta",
				"-alpha.",
				"1.0.0-alpha..",
				"1.0.0-alpha..1",
				"1.0.0-alpha...1",
				"1.0.0-alpha....1",
				"1.0.0-alpha.....1",
				"1.0.0-alpha......1",
				"1.0.0-alpha.......1",
				"01.1.1",
				"1.01.1",
				"1.1.01",
				"1.2",
				"1.2.3.DEV",
				"1.2-SNAPSHOT",
				"1.2.31.2.3----RC-SNAPSHOT.12.09.1--..12+788",
				"1.2-RC-SNAPSHOT",
				"-1.0.3-gamma+b7718",
				"+justmeta",
				"9.8.7+meta+meta",
				"9.8.7-whatever+meta+meta",
				"99999999999999999999999.999999999999999999.99999999999999999----RC-SNAPSHOT.12.09.1--------------------------------..12",
				"0.0.1+build.2415445056+commit.b1e31c3",
			},
			expected: ErrInvalidSemVer,
		},
	}

	for _, tc := range tests {
		for _, input := range tc.inputs {
			err := IsValidSemver(input)
			if err != tc.expected {
				t.Errorf("Unexpected SemVer validation result: got %v, expected %v\nSemVer: %v\n", err, tc.expected, input)
			}
		}
	}
}