"""
Tests for SKILL.md validation.
Task 1: Test SKILL.md file exists.
Task 2: Test SKILL.md has valid YAML frontmatter.
Task 3: Test SKILL.md has name field.
Task 4: Test SKILL.md has description field.
Task 5: Test description contains /gsd: pattern for triggering.
"""
import pytest
from pathlib import Path
import yaml


class TestSkillMd:
    """Tests for SKILL.md structure and trigger patterns."""

    @property
    def skill_path(self) -> Path:
        """Get path to SKILL.md."""
        return Path(__file__).parent.parent / "skill" / "SKILL.md"

    def test_skill_md_exists(self):
        """SKILL.md file exists at skill/SKILL.md."""
        assert self.skill_path.exists(), f"SKILL.md not found at {self.skill_path}"

    def test_skill_md_has_valid_frontmatter(self):
        """SKILL.md has valid YAML frontmatter between --- delimiters."""
        content = self.skill_path.read_text(encoding="utf-8")

        # Check file starts with ---
        assert content.startswith("---\n"), "SKILL.md must start with '---' frontmatter delimiter"

        # Find closing delimiter
        parts = content.split("---\n", 2)
        assert len(parts) >= 3, "SKILL.md must have opening and closing '---' delimiters"

        # Parse frontmatter as YAML
        frontmatter_text = parts[1].strip()
        frontmatter = yaml.safe_load(frontmatter_text)
        assert isinstance(frontmatter, dict), "Frontmatter must be valid YAML"

    def test_skill_md_has_name_field(self):
        """SKILL.md frontmatter contains 'name' field."""
        frontmatter = self._parse_frontmatter()
        assert "name" in frontmatter, "Frontmatter must contain 'name' field"
        assert isinstance(frontmatter["name"], str), "'name' must be a string"
        assert len(frontmatter["name"]) > 0, "'name' must not be empty"

    def test_skill_md_has_description_field(self):
        """SKILL.md frontmatter contains 'description' field."""
        frontmatter = self._parse_frontmatter()
        assert "description" in frontmatter, "Frontmatter must contain 'description' field"
        assert isinstance(frontmatter["description"], str), "'description' must be a string"
        assert len(frontmatter["description"]) > 0, "'description' must not be empty"

    def test_skill_md_description_contains_gsd_pattern(self):
        """SKILL.md description contains /gsd: pattern for trigger matching."""
        frontmatter = self._parse_frontmatter()
        description = frontmatter.get("description", "")
        assert "/gsd:" in description, "Description must contain '/gsd:' pattern for OpenClaw trigger matching"

    def _parse_frontmatter(self) -> dict:
        """Parse and return frontmatter from SKILL.md."""
        content = self.skill_path.read_text(encoding="utf-8")
        parts = content.split("---\n", 2)
        frontmatter_text = parts[1].strip()
        return yaml.safe_load(frontmatter_text)