"""Tests for branch_parser module. Written FIRST (TDD RED phase)."""


from release_agent.branch_parser import parse_branch, strip_refs_prefix


class TestStripRefsPrefix:
    """Tests for strip_refs_prefix function."""

    def test_strips_refs_heads_prefix(self) -> None:
        assert strip_refs_prefix("refs/heads/fix/BILL-42_something") == "fix/BILL-42_something"

    def test_strips_refs_heads_prefix_feature(self) -> None:
        assert strip_refs_prefix("refs/heads/feature/ALLPOST-100_add-feature") == "feature/ALLPOST-100_add-feature"

    def test_no_refs_prefix_unchanged(self) -> None:
        assert strip_refs_prefix("bug/ALLPOST-4229_fix-review") == "bug/ALLPOST-4229_fix-review"

    def test_main_unchanged(self) -> None:
        assert strip_refs_prefix("main") == "main"

    def test_develop_unchanged(self) -> None:
        assert strip_refs_prefix("develop") == "develop"

    def test_empty_string(self) -> None:
        assert strip_refs_prefix("") == ""

    def test_only_refs_heads(self) -> None:
        assert strip_refs_prefix("refs/heads/") == ""

    def test_refs_tags_not_stripped(self) -> None:
        assert strip_refs_prefix("refs/tags/v1.0.0") == "refs/tags/v1.0.0"


class TestParseBranch:
    """Tests for parse_branch function."""

    def test_bug_branch_with_ticket(self) -> None:
        ticket_id, has_ticket = parse_branch("bug/ALLPOST-4229_fix-review")
        assert ticket_id == "ALLPOST-4229"
        assert has_ticket is True

    def test_feature_branch_with_ticket(self) -> None:
        ticket_id, has_ticket = parse_branch("feature/ALLPOST-100_add-feature")
        assert ticket_id == "ALLPOST-100"
        assert has_ticket is True

    def test_refs_heads_fix_branch(self) -> None:
        ticket_id, has_ticket = parse_branch("refs/heads/fix/BILL-42_something")
        assert ticket_id == "BILL-42"
        assert has_ticket is True

    def test_feat_branch_short(self) -> None:
        ticket_id, has_ticket = parse_branch("feat/MY-1_x")
        assert ticket_id == "MY-1"
        assert has_ticket is True

    def test_chore_without_ticket(self) -> None:
        ticket_id, has_ticket = parse_branch("chore/update-dependencies")
        assert ticket_id is None
        assert has_ticket is False

    def test_main_branch(self) -> None:
        ticket_id, has_ticket = parse_branch("main")
        assert ticket_id is None
        assert has_ticket is False

    def test_develop_branch(self) -> None:
        ticket_id, has_ticket = parse_branch("develop")
        assert ticket_id is None
        assert has_ticket is False

    def test_release_branch(self) -> None:
        ticket_id, has_ticket = parse_branch("release/v1.0.3")
        assert ticket_id is None
        assert has_ticket is False

    def test_returns_tuple(self) -> None:
        result = parse_branch("main")
        assert isinstance(result, tuple)
        assert len(result) == 2

    def test_ticket_id_type_when_present(self) -> None:
        ticket_id, has_ticket = parse_branch("bug/ALLPOST-4229_fix-review")
        assert isinstance(ticket_id, str)
        assert isinstance(has_ticket, bool)

    def test_ticket_id_type_when_absent(self) -> None:
        ticket_id, has_ticket = parse_branch("main")
        assert ticket_id is None
        assert isinstance(has_ticket, bool)

    def test_fix_prefix(self) -> None:
        ticket_id, has_ticket = parse_branch("fix/PROJ-999_some-fix")
        assert ticket_id == "PROJ-999"
        assert has_ticket is True

    def test_refs_heads_feature_branch(self) -> None:
        ticket_id, has_ticket = parse_branch("refs/heads/feature/ALLPOST-100_add-feature")
        assert ticket_id == "ALLPOST-100"
        assert has_ticket is True

    def test_ticket_with_multiple_digits(self) -> None:
        ticket_id, has_ticket = parse_branch("feature/ABC-12345_some-long-feature")
        assert ticket_id == "ABC-12345"
        assert has_ticket is True

    def test_branch_without_underscore_separator(self) -> None:
        # Branch has ticket pattern but no underscore - still detects ticket
        ticket_id, has_ticket = parse_branch("feature/PROJ-100")
        assert ticket_id == "PROJ-100"
        assert has_ticket is True

    def test_empty_string(self) -> None:
        ticket_id, has_ticket = parse_branch("")
        assert ticket_id is None
        assert has_ticket is False

    def test_ticket_with_numeric_project_prefix(self) -> None:
        ticket_id, has_ticket = parse_branch("feature/AB2-100_feature")
        assert ticket_id == "AB2-100"
        assert has_ticket is True