"""Copy host-side skill directories into a running Docker bottle.

Skills are validated on the host before launch by the base class's
`BottleBackend._validate_skills` (called from `prepare`); this module
assumes that validation has already run. A skill disappearing between
validation and copy still dies loudly rather than silently producing
a partial container."""

from __future__ import annotations

import os
import subprocess

from ....log import die, info
from ...util import host_skill_dir
from ..bottle_plan import DockerBottlePlan


def provision_skills(plan: DockerBottlePlan, target: str) -> None:
    """Copy each of the agent's named skills from the host's
    ~/.claude/skills/<name>/ into the container's equivalent path.
    For each skill: ensure parent dir, wipe any prior copy, then
    `docker cp <host>/. <container>:<dst>/` so the contents are
    copied into a freshly-created destination dir. No-op when the
    agent has no skills."""
    agent = plan.spec.manifest.agents[plan.spec.agent_name]
    if not agent.skills:
        return

    container = target
    container_home = os.environ.get("BOT_BOTTLE_CONTAINER_HOME", "/home/node")
    skills_dir = os.environ.get(
        "BOT_BOTTLE_CONTAINER_SKILLS_DIR", f"{container_home}/.claude/skills"
    )

    subprocess.run(
        ["docker", "exec", container, "mkdir", "-p", skills_dir],
        stdout=subprocess.DEVNULL,
        check=True,
    )

    for n in agent.skills:
        src = host_skill_dir(n)
        if not os.path.isdir(src):
            die(f"skill '{n}' disappeared from host between validation and copy at {src}.")
        dst = f"{skills_dir}/{n}"
        info(f"copying skill {n} into {container}:{dst}")
        subprocess.run(
            ["docker", "exec", container, "rm", "-rf", dst],
            stdout=subprocess.DEVNULL,
            check=True,
        )
        subprocess.run(
            ["docker", "exec", container, "mkdir", "-p", dst],
            stdout=subprocess.DEVNULL,
            check=True,
        )
        subprocess.run(
            ["docker", "cp", f"{src}/.", f"{container}:{dst}/"],
            stdout=subprocess.DEVNULL,
            check=True,
        )