"""Regression tests for SKILL.md frontmatter quoting (#3391).

The skills setup path builds SKILL.md frontmatter by hand with
double-quoted values. A double-quoted YAML scalar cannot carry a raw
newline (the parser folds it to a space) or a control character (the
reader rejects the document), so descriptions taken from template
frontmatter must be escaped by the YAML emitter.
"""

from pathlib import Path

import yaml

from specify_cli.integrations import get_integration
from specify_cli.integrations.base import yaml_quote
from specify_cli.integrations.manifest import IntegrationManifest

MULTILINE = "first line\nsecond line\n"
CONTROL = "ding\aling"

HOSTILE_TEMPLATE = """---
description: |
  first line
  second line
---

Body of the command.
"""

CONTROL_TEMPLATE = """---
description: "ding\\aling"
---

Body of the command.
"""

# A description whose value contains an embedded ``---``. A substring split
# (``raw.split("---", 2)``) stops at this inner marker, truncating the parsed
# frontmatter — the closing document separator on its own line is the real
# boundary. See TestSkillFrontmatterEmbeddedDashes below.
DASHED_DESCRIPTION = "Separate sections with --- markers"
DASHED_TEMPLATE = """---
description: Separate sections with --- markers
name-marker: sentinel
---

Body of the command.
"""


def _parse_frontmatter(skill_file: Path) -> dict:
    content = skill_file.read_text(encoding="utf-8")
    assert content.startswith("---\n")
    return yaml.safe_load(content.split("---", 2)[1])


def _fake_templates(tmp_path: Path, body: str) -> Path:
    templates = tmp_path / "templates"
    templates.mkdir(exist_ok=True)
    (templates / "plan.md").write_text(body, encoding="utf-8")
    return templates


class TestYamlQuote:
    def test_simple_value_keeps_plain_double_quoted_form(self):
        assert yaml_quote("speckit-plan") == '"speckit-plan"'
        assert yaml_quote('say "hi"') == '"say \\"hi\\""'
        assert yaml_quote("back\\slash") == '"back\\\\slash"'

    def test_multiline_value_round_trips(self):
        quoted = yaml_quote(MULTILINE)
        assert "\n" not in quoted
        assert yaml.safe_load(quoted) == MULTILINE

    def test_control_character_round_trips(self):
        quoted = yaml_quote(CONTROL)
        assert "\a" not in quoted
        assert yaml.safe_load(quoted) == CONTROL


class TestSkillFrontmatterQuoting:
    def _generate(self, tmp_path, monkeypatch, template: str) -> Path:
        integration = get_integration("agy")
        monkeypatch.setattr(
            integration,
            "shared_commands_dir",
            lambda: _fake_templates(tmp_path, template),
        )
        manifest = IntegrationManifest("agy", tmp_path)
        created = integration.setup(tmp_path, manifest)
        skill_files = [f for f in created if f.name == "SKILL.md"]
        assert len(skill_files) == 1
        return skill_files[0]

    def test_multiline_description_survives(self, tmp_path, monkeypatch):
        skill_file = self._generate(tmp_path, monkeypatch, HOSTILE_TEMPLATE)
        fm = _parse_frontmatter(skill_file)
        assert fm["description"] == MULTILINE

    def test_control_character_description_parses(self, tmp_path, monkeypatch):
        skill_file = self._generate(tmp_path, monkeypatch, CONTROL_TEMPLATE)
        fm = _parse_frontmatter(skill_file)
        assert fm["description"] == CONTROL


def _parse_frontmatter_line_anchored(skill_file: Path) -> dict:
    """Parse SKILL.md frontmatter using the closing ``---`` on its own line.

    Unlike ``_parse_frontmatter`` (which uses ``split("---", 2)``), this is
    robust to a ``---`` embedded in a value, so it can validate that the
    generated frontmatter is itself well formed.
    """
    content = skill_file.read_text(encoding="utf-8")
    assert content.startswith("---\n")
    lines = content.splitlines(keepends=True)
    end = next(i for i in range(1, len(lines)) if lines[i].rstrip() == "---")
    return yaml.safe_load("".join(lines[1:end]))


class TestSkillFrontmatterEmbeddedDashes:
    """A ``---`` inside a description value must not truncate parsing (#3634).

    The skills setup path parsed template frontmatter with
    ``raw.split("---", 2)``, which stops at the first ``---`` *anywhere* —
    including one inside a value such as ``description: ... --- ...``. That
    dropped every frontmatter key after the marker (so the description fell
    back to the generic default) and spilled the leftover frontmatter into
    the skill body. The parser must match the closing ``---`` on its own line.
    """

    def _generate(self, tmp_path, monkeypatch, template: str) -> Path:
        integration = get_integration("agy")
        monkeypatch.setattr(
            integration,
            "shared_commands_dir",
            lambda: _fake_templates(tmp_path, template),
        )
        manifest = IntegrationManifest("agy", tmp_path)
        created = integration.setup(tmp_path, manifest)
        skill_files = [f for f in created if f.name == "SKILL.md"]
        assert len(skill_files) == 1
        return skill_files[0]

    def test_dashed_description_is_preserved(self, tmp_path, monkeypatch):
        skill_file = self._generate(tmp_path, monkeypatch, DASHED_TEMPLATE)
        fm = _parse_frontmatter_line_anchored(skill_file)
        # Buggy split("---", 2) truncates the value to "Separate sections with"
        # (or drops it entirely, falling back to "Spec Kit: plan workflow").
        assert fm["description"] == DASHED_DESCRIPTION

    def test_leftover_frontmatter_not_spilled_into_body(self, tmp_path, monkeypatch):
        skill_file = self._generate(tmp_path, monkeypatch, DASHED_TEMPLATE)
        content = skill_file.read_text(encoding="utf-8")
        lines = content.splitlines(keepends=True)
        end = next(i for i in range(1, len(lines)) if lines[i].rstrip() == "---")
        body = "".join(lines[end + 1 :])
        # The template's trailing frontmatter key must not leak into the body.
        assert "name-marker: sentinel" not in body
        assert "Body of the command." in body


class TestHermesSkillFrontmatterQuoting:
    def test_multiline_description_survives(self, tmp_path, monkeypatch):
        home = tmp_path / "home"
        home.mkdir(exist_ok=True)
        monkeypatch.setattr(Path, "home", lambda: home)

        integration = get_integration("hermes")
        monkeypatch.setattr(
            integration,
            "shared_commands_dir",
            lambda: _fake_templates(tmp_path, HOSTILE_TEMPLATE),
        )
        manifest = IntegrationManifest("hermes", tmp_path)
        created = integration.setup(tmp_path, manifest)
        skill_files = [f for f in created if f.name == "SKILL.md"]
        assert len(skill_files) == 1

        fm = _parse_frontmatter(skill_files[0])
        assert fm["description"] == MULTILINE