package domain

import (
	"errors"
	"testing"
)

func TestSemVerPrecedence(t *testing.T) {
	ordered := []string{
		"1.0.0-alpha",
		"1.0.0-alpha.1",
		"1.0.0-alpha.beta",
		"1.0.0-beta",
		"1.0.0-beta.2",
		"1.0.0-beta.11",
		"1.0.0-rc.1",
		"1.0.0",
		"1.0.1",
		"1.1.0",
		"2.0.0",
	}
	for index := 0; index < len(ordered)-1; index++ {
		comparison, err := CompareSemVer(ordered[index], ordered[index+1])
		if err != nil {
			t.Fatalf("CompareSemVer() error = %v", err)
		}
		if comparison >= 0 {
			t.Fatalf("%q should precede %q", ordered[index], ordered[index+1])
		}
	}
}

func TestSemVerIgnoresBuildMetadata(t *testing.T) {
	comparison, err := CompareSemVer("1.2.3+build.1", "1.2.3+build.99")
	if err != nil {
		t.Fatalf("CompareSemVer() error = %v", err)
	}
	if comparison != 0 {
		t.Fatalf("comparison = %d, want 0", comparison)
	}
}

func TestSemVerSupportsLargeNumericIdentifiers(t *testing.T) {
	comparison, err := CompareSemVer(
		"999999999999999999999999999.0.0",
		"1000000000000000000000000000.0.0",
	)
	if err != nil {
		t.Fatalf("CompareSemVer() error = %v", err)
	}
	if comparison >= 0 {
		t.Fatalf("comparison = %d, want negative", comparison)
	}
}

func TestSemVerRejectsInvalidValues(t *testing.T) {
	for _, value := range []string{
		"",
		"1",
		"1.2",
		"01.2.3",
		"1.02.3",
		"1.2.03",
		"1.2.3-",
		"1.2.3-alpha..1",
		"1.2.3-01",
		"1.2.3+",
		"1.2.3+build..1",
		"v1.2.3",
		"1.2.3 alpha",
	} {
		t.Run(value, func(t *testing.T) {
			_, err := ParseSemVer(value)
			if !errors.Is(err, ErrInvalidSemVer) {
				t.Fatalf("ParseSemVer(%q) error = %v, want %v", value, err, ErrInvalidSemVer)
			}
		})
	}
}