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"""
GPU architecture detection for TensileLite unit and common tests.
"""

import os
import subprocess


def get_available_archs() -> list[str]:
    """Get list of available GPU architectures via rocm_agent_enumerator.

    Environment variable priority:
        1. TENSILE_ROCM_PATH (test-specific override)
        2. ROCM_PATH (standard ROCm variable)
        3. /opt/rocm (default)

    Returns:
        List of unique gfx architecture strings (e.g. ["gfx950"]).
        Returns empty list if rocm_agent_enumerator is not found or fails.
    """
    rocmpath = os.environ.get(
        "TENSILE_ROCM_PATH", os.environ.get("ROCM_PATH", "/opt/rocm")
    )
    enumerator = os.path.join(rocmpath, "bin", "rocm_agent_enumerator")
    if not os.path.exists(enumerator):
        return []
    try:
        output = subprocess.check_output([enumerator, "-t", "GPU"])
        return list(dict.fromkeys(
            line.strip()
            for line in output.decode().splitlines()
            if line.strip() and "gfx000" not in line
        ))
    except (FileNotFoundError, subprocess.CalledProcessError):
        return []


def has_arch(target: str) -> bool:
    """Check if a specific GPU architecture is available."""
    return any(target in arch for arch in get_available_archs())