"""ASV benchmarks for Agent Skills discovery scan overhead.

Measures the performance of:
- ``parse_agent_skills_paths`` path parsing
- ``scan_directory`` filesystem scanning
- ``build_tool_spec`` ToolSpec construction
- ``register_discovered_skills`` registration in ToolRegistry
"""

from __future__ import annotations

import shutil
import sys
import tempfile
from pathlib import Path
from typing import ClassVar

try:
    from cleveragents.skills.discovery import (
        DiscoveredAgentSkill,
        build_tool_spec,
        parse_agent_skills_paths,
        register_discovered_skills,
        scan_directory,
    )
    from cleveragents.tool.registry import ToolRegistry
except ModuleNotFoundError:
    sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))
    from cleveragents.skills.discovery import (
        DiscoveredAgentSkill,
        build_tool_spec,
        parse_agent_skills_paths,
        register_discovered_skills,
        scan_directory,
    )
    from cleveragents.tool.registry import ToolRegistry


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------


def _create_skill_md(folder: Path, name: str) -> None:
    """Create a SKILL.md with minimal front-matter."""
    folder.mkdir(parents=True, exist_ok=True)
    content = (
        f"---\nname: {name}\ndescription: Benchmark skill {name}\n---\n\n# {name}\n"
    )
    (folder / "SKILL.md").write_text(content, encoding="utf-8")


def _make_discovered(name: str) -> DiscoveredAgentSkill:
    return DiscoveredAgentSkill(
        name=name,
        description=f"Benchmark skill {name}",
        path=f"/tmp/bench/{name}",
    )


# ---------------------------------------------------------------------------
# Benchmark suite
# ---------------------------------------------------------------------------


class ParsePathsSuite:
    """Benchmark path string parsing."""

    def setup(self) -> None:
        self.paths_str = ",".join(f"/opt/skills/dir-{i}" for i in range(20))

    def time_parse_20_paths(self) -> None:
        parse_agent_skills_paths(self.paths_str)


class ScanDirectorySuite:
    """Benchmark filesystem scanning."""

    def setup(self) -> None:
        self.tmpdir = Path(tempfile.mkdtemp())
        for i in range(50):
            _create_skill_md(self.tmpdir / f"skill-{i}", f"skill-{i}")

    def teardown(self) -> None:
        shutil.rmtree(str(self.tmpdir), ignore_errors=True)

    def time_scan_50_skills(self) -> None:
        scan_directory(self.tmpdir)


class BuildToolSpecSuite:
    """Benchmark ToolSpec construction from discovered skills."""

    def setup(self) -> None:
        self.skills = [_make_discovered(f"tool-{i}") for i in range(100)]

    def time_build_100_toolspecs(self) -> None:
        for skill in self.skills:
            build_tool_spec(skill)


class RegisterSuite:
    """Benchmark tool registration with conflict handling."""

    params: ClassVar[list[int]] = [10, 50, 100]
    param_names: ClassVar[list[str]] = ["count"]

    def setup(self, count: int) -> None:
        self.skills = [_make_discovered(f"tool-{i}") for i in range(count)]

    def time_register(self, count: int) -> None:
        registry = ToolRegistry()
        register_discovered_skills(self.skills, registry, on_conflict="skip")