"""Start Claude Code in the myclaude project directory."""

import os
import shutil
import subprocess
import sys
from pathlib import Path

import click
from rich.console import Console

from myclaude.project_root import get_myclaude_project_root

console = Console()


def _resolve_chat_cwd() -> Path:
    root = get_myclaude_project_root()
    fallback = Path.home() / ".myclaude"
    if root == fallback:
        console.print(
            "[red]Cannot resolve myclaude project root.[/red] Run from the repo or set "
            "[cyan]MYCLAUDE_PROJECT_ROOT[/cyan].",
            file=sys.stderr,
        )
        raise SystemExit(1)
    return root


@click.command(
    "chat",
    context_settings={
        "ignore_unknown_options": True,
        "allow_extra_args": True,
    },
)
@click.option(
    "--dangerously-skip-permissions",
    is_flag=True,
    default=False,
    help="Forward to claude: bypass permission checks (sandbox / isolated use only).",
)
@click.pass_context
def chat_cmd(ctx: click.Context, dangerously_skip_permissions: bool) -> None:
    """Run `claude` in the myclaude repo so CLAUDE.md and .claude/ apply; extra args pass through."""
    binary = os.environ.get("CLAUDE_BIN") or shutil.which("claude")
    if not binary:
        console.print(
            "[red]claude CLI not found in PATH.[/red] Install Claude Code or set "
            "[cyan]CLAUDE_BIN[/cyan].",
            file=sys.stderr,
        )
        raise SystemExit(127)

    cwd = _resolve_chat_cwd()
    cmd: list[str] = [binary]
    if dangerously_skip_permissions:
        cmd.append("--dangerously-skip-permissions")
    cmd.extend(ctx.args)

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