"""bincio edit — local edit server for activity sidecar files."""

from __future__ import annotations

from pathlib import Path
from typing import Optional

import click
from rich.console import Console

console = Console()


@click.command()
@click.option("--data-dir", default=None,
              help="BAS data store directory (output of bincio extract).")
@click.option("--port", default=4041, show_default=True,
              help="Port for the edit server.")
@click.option("--site-url", default="http://localhost:4321", show_default=True,
              help="URL of the Astro dev server (for the Back link).")
@click.option("--config", "config_path", default=None,
              help="Path to extract_config.yaml (reads output.dir from it).")
def edit(
    data_dir: Optional[str],
    port: int,
    site_url: str,
    config_path: Optional[str],
) -> None:
    """Start a local web UI for editing activity sidecar files.

    Writes sidecar .md files to <data-dir>/edits/ which bincio render picks
    up and applies at build time.

    Run alongside the Astro dev server:

    \b
        bincio render --serve      # port 4321  (or npm run dev)
        bincio edit                # port 4041
    """
    try:
        import uvicorn
    except ImportError:
        raise click.ClickException(
            "uvicorn is required for the edit server.\n"
            "Install with: uv add 'bincio[edit]'"
        )

    data = _resolve_data_dir(data_dir, config_path)
    console.print(f"Data dir: [cyan]{data}[/cyan]")
    console.print(f"Edit UI:  [cyan]http://localhost:{port}/edit/<activity-id>[/cyan]")
    console.print(f"Site URL: [cyan]{site_url}[/cyan]")
    console.print("Press [bold]Ctrl+C[/bold] to stop.\n")

    import bincio.edit.server as srv
    srv.data_dir = data
    srv.site_url = site_url

    uvicorn.run(srv.app, host="127.0.0.1", port=port, log_level="warning")


def _resolve_data_dir(explicit: Optional[str], config_path: Optional[str]) -> Path:
    if explicit:
        return Path(explicit).expanduser().resolve()

    if config_path and Path(config_path).exists():
        import yaml
        raw = yaml.safe_load(Path(config_path).read_text())
        out = raw.get("output", {}).get("dir")
        if out:
            return Path(out).expanduser().resolve()

    default = Path.cwd() / "bincio_data"
    if default.exists():
        return default

    raise click.UsageError(
        "Could not find the BAS data directory. "
        "Run `bincio extract` first, or pass --data-dir."
    )