import pytest

from ops_mason.plan import ConstructionPlan, PlanError


def _write(tmp_path, frontmatter: str, body: str = "\n# Plan\n") -> str:
    p = tmp_path / "plan.md"
    p.write_text(f"---\n{frontmatter}\n---\n{body}")
    return str(p)


def test_load_parses_frontmatter(tmp_path) -> None:
    path = _write(
        tmp_path,
        "id: test-plan\nstatus: draft\ndemand_source: x\nconsumer_repo: y\ncredential_type: openbao-approle-kv",
    )
    plan = ConstructionPlan.load(path)
    assert plan.id == "test-plan"
    assert plan.status == "draft"
    assert plan.consumer_repo == "y"


def test_is_approved_false_when_draft(tmp_path) -> None:
    path = _write(tmp_path, "id: p\nstatus: draft")
    assert ConstructionPlan.load(path).is_approved() is False


def test_is_approved_false_when_approved_but_missing_approver(tmp_path) -> None:
    path = _write(tmp_path, "id: p\nstatus: approved")
    assert ConstructionPlan.load(path).is_approved() is False


def test_is_approved_true_when_fully_approved(tmp_path) -> None:
    path = _write(
        tmp_path,
        'id: p\nstatus: approved\napproved_by: "bernd"\napproved_at: "2026-07-27"',
    )
    assert ConstructionPlan.load(path).is_approved() is True


def test_missing_frontmatter_raises(tmp_path) -> None:
    p = tmp_path / "plan.md"
    p.write_text("# no frontmatter here\n")
    with pytest.raises(PlanError, match="missing YAML frontmatter"):
        ConstructionPlan.load(str(p))


def test_missing_required_field_raises(tmp_path) -> None:
    path = _write(tmp_path, "id: p\n# status omitted")
    with pytest.raises(PlanError, match="missing field"):
        ConstructionPlan.load(path)


@pytest.mark.parametrize("frontmatter", [
    "id: p\nstatus: reviewed\nstatus: approved",
    "id: p\nstatus: approved\nbuild_spec:\n  token_num_uses: 8\n  token_num_uses: 0",
    "- not-a-mapping",
])
def test_ambiguous_or_malformed_approval_document_refused(tmp_path, frontmatter):
    with pytest.raises(PlanError):
        ConstructionPlan.load(_write(tmp_path, frontmatter))


@pytest.mark.parametrize("approver", ['" "', "true", "[bernd]"])
def test_non_string_or_blank_approval_marker_is_not_approval(tmp_path, approver):
    path = _write(tmp_path, f'id: p\nstatus: approved\napproved_by: {approver}\napproved_at: "2026-09-28"')
    assert not ConstructionPlan.load(path).is_approved()


def test_triple_dash_inside_specification_is_not_frontmatter_delimiter(tmp_path):
    path = _write(tmp_path, 'id: p\nstatus: draft\nbuild_spec:\n  policy_name: "lane---example"')
    assert ConstructionPlan.load(path).build_spec["policy_name"] == "lane---example"