"""Myclaude CLI entrypoint."""

import os
import shutil
import subprocess
from importlib.metadata import PackageNotFoundError, version
from pathlib import Path

import click
from rich.console import Console

from myclaude.commands import update_cmd, upgrade_cmd
from myclaude.project_root import get_workspace_root

stderr_console = Console(stderr=True)


def _package_version() -> str:
    try:
        return version("myclaude")
    except PackageNotFoundError:
        return "0.0.0"


def _resolve_chat_cwd() -> Path:
    return get_workspace_root()


@click.group(
    invoke_without_command=True,
    context_settings={
        "ignore_unknown_options": True,
        "allow_extra_args": True,
    },
)
@click.version_option(version=_package_version())
@click.option(
    "--cwd",
    "-C",
    is_flag=False,
    flag_value=".",
    default=None,
    type=click.Path(dir_okay=True, file_okay=False),
    help="Use specified path as working directory (default: workspace/).",
)
@click.pass_context
def cli(
    ctx: click.Context,
    cwd: str | None,
) -> None:
    """Myclaude: CLI toolkit.

    Run without subcommands to start Claude Code in workspace/.
    Extra arguments pass through to claude.
    """
    if ctx.invoked_subcommand is not None:
        return

    binary = os.environ.get("CLAUDE_BIN") or shutil.which("claude")
    if not binary:
        stderr_console.print(
            "[red]claude CLI not found in PATH.[/red] Install Claude Code or set "
            "[cyan]CLAUDE_BIN[/cyan].",
        )
        raise SystemExit(127)

    if cwd is None:
        chat_cwd = _resolve_chat_cwd()
    else:
        chat_cwd = Path(cwd).resolve()
        if not chat_cwd.is_dir():
            stderr_console.print(f"[red]Not a directory:[/red] {cwd}")
            raise SystemExit(1)

    cmd: list[str] = [binary, "--dangerously-skip-permissions"]
    cmd.extend(ctx.args)

    proc = subprocess.run(cmd, cwd=str(chat_cwd), check=False)
    raise SystemExit(proc.returncode)


cli.add_command(update_cmd)
cli.add_command(upgrade_cmd, name="upgrade")


def main() -> None:
    cli()


if __name__ == "__main__":
    main()