"""
MCP Resources for protein structure access.

Provides access to:
- PDB structures by ID
- Generated design files
"""

from pathlib import Path
from typing import Any


async def get_structure(pdb_id: str) -> dict[str, Any]:
    """
    Get a PDB structure by ID.

    Args:
        pdb_id: PDB ID (e.g., "1abc")

    Returns:
        Dictionary with structure information
    """
    # TODO: Implement PDB fetching
    # 1. Check local cache
    # 2. Download from RCSB if not cached
    # 3. Return structure info

    raise NotImplementedError("get_structure not yet implemented")


async def list_structures(pattern: str | None = None) -> list[dict[str, Any]]:
    """
    List available structures.

    Args:
        pattern: Optional glob pattern to filter

    Returns:
        List of structure info dictionaries
    """
    # TODO: Implement structure listing
    raise NotImplementedError("list_structures not yet implemented")


async def get_design(job_id: str, design_id: str) -> dict[str, Any]:
    """
    Get a generated design by job and design ID.

    Args:
        job_id: Job ID from design_binder call
        design_id: Specific design ID

    Returns:
        Dictionary with design information
    """
    # TODO: Implement design retrieval
    raise NotImplementedError("get_design not yet implemented")


def find_local_pdb(pdb_path: str | Path) -> Path | None:
    """
    Find a PDB file on the local filesystem.

    Args:
        pdb_path: Path or PDB ID

    Returns:
        Path to PDB file or None if not found
    """
    path = Path(pdb_path)
    if path.exists():
        return path

    # Check common locations
    common_dirs = [
        Path.cwd(),
        Path.home() / "pdbs",
        Path("/data/pdbs"),
    ]

    for directory in common_dirs:
        candidate = directory / f"{pdb_path}.pdb"
        if candidate.exists():
            return candidate

    return None
