"""Tests for version parsing and normalization functions."""

import pytest

from debian_todo import (
    parse_details,
    is_prerelease_version,
    normalize_upstream_version,
)


class TestParseDetails:
    """Tests for parse_details function."""

    def test_with_current_version(self):
        details = "1.2.3 (currently in unstable: 1.2.2-1)"
        new, current = parse_details(details)
        assert new == "1.2.3"
        assert current == "1.2.2-1"

    def test_without_current_version(self):
        details = "1.2.3"
        new, current = parse_details(details)
        assert new == "1.2.3"
        assert current is None

    def test_with_epoch_in_current(self):
        details = "2.0.0 (currently in unstable: 1:1.9.0-2)"
        new, current = parse_details(details)
        assert new == "2.0.0"
        assert current == "1:1.9.0-2"

    def test_strips_whitespace(self):
        details = "  1.2.3  (currently in unstable:  1.2.2-1  )  "
        new, current = parse_details(details)
        assert new == "1.2.3"
        assert current == "1.2.2-1"

    def test_empty_string(self):
        new, current = parse_details("")
        assert new == ""
        assert current is None


class TestIsPrereleaseVersion:
    """Tests for is_prerelease_version function."""

    def test_alpha_version(self):
        assert is_prerelease_version("1.0.0alpha1") is True
        assert is_prerelease_version("1.0.0-alpha2") is True
        assert is_prerelease_version("1.0.0.alpha") is True

    def test_beta_version(self):
        assert is_prerelease_version("1.0.0beta1") is True
        assert is_prerelease_version("1.0.0-beta2") is True
        assert is_prerelease_version("2.0b1") is True

    def test_rc_version(self):
        assert is_prerelease_version("1.0.0rc1") is True
        assert is_prerelease_version("1.0.0-rc2") is True
        assert is_prerelease_version("1.0.0.rc3") is True

    def test_short_prerelease(self):
        assert is_prerelease_version("1.0a1") is True
        assert is_prerelease_version("1.0b2") is True

    def test_stable_version(self):
        assert is_prerelease_version("1.0.0") is False
        assert is_prerelease_version("2.3.4") is False
        assert is_prerelease_version("1.0.0-1") is False

    def test_version_with_current(self):
        assert is_prerelease_version("1.0.0rc1 (currently in unstable: 0.9.0-1)") is True
        assert is_prerelease_version("1.0.0 (currently in unstable: 0.9.0-1)") is False

    def test_case_insensitive(self):
        assert is_prerelease_version("1.0.0Alpha1") is True
        assert is_prerelease_version("1.0.0BETA1") is True
        assert is_prerelease_version("1.0.0RC1") is True


class TestNormalizeUpstreamVersion:
    """Tests for normalize_upstream_version function."""

    def test_simple_version(self):
        assert normalize_upstream_version("1.2.3") == "1.2.3"

    def test_strips_debian_revision(self):
        assert normalize_upstream_version("1.2.3-1") == "1.2.3"
        assert normalize_upstream_version("1.2.3-2ubuntu1") == "1.2.3"

    def test_strips_epoch(self):
        assert normalize_upstream_version("1:1.2.3") == "1.2.3"
        assert normalize_upstream_version("2:1.2.3") == "1.2.3"

    def test_strips_epoch_and_revision(self):
        assert normalize_upstream_version("1:1.2.3-4") == "1.2.3"

    def test_strips_whitespace(self):
        assert normalize_upstream_version("  1.2.3  ") == "1.2.3"

    def test_version_with_hyphen_in_upstream(self):
        # Only the last hyphen is treated as revision separator
        assert normalize_upstream_version("1.2.3-beta-1") == "1.2.3-beta"