"""Dataset management commands."""

import click
from tabulate import tabulate


@click.group("datasets")
def datasets_group() -> None:
    """Manage evaluation datasets."""


@datasets_group.command("sync")
@click.argument("repo")
@click.option("--force", "-f", is_flag=True, help="Force re-download")
@click.pass_context
def sync_dataset(ctx: click.Context, repo: str, force: bool) -> None:
    """Sync a dataset from HuggingFace."""
    cfg = ctx.obj["config"]

    if cfg.is_remote:
        from solar_eval.cli.client import EvalClient
        client = EvalClient(cfg.remote_url, cfg.timeout)
        click.secho(f"Syncing via server: {repo}...", fg="blue")
        result = client.post("/api/datasets/sync", json={"repo": repo, "force": force})
        if result.get("error"):
            click.secho(f"Sync failed: {result['error']}", fg="red")
            raise SystemExit(1)
        click.secho(f"Synced {len(result.get('synced_files', []))} file(s)", fg="green")
    else:
        from solar_eval.core.dataset_loader import DatasetLoader
        click.secho(f"Syncing locally: {repo}...", fg="blue")
        loader = DatasetLoader()
        files = loader.list_files(repo)
        for f in files:
            click.echo(f"  Downloading: {f}")
            loader.download_file(repo, f, force=force)
        click.secho(f"Synced {len(files)} file(s)", fg="green")


@datasets_group.command("list")
@click.pass_context
def list_datasets(ctx: click.Context) -> None:
    """List available datasets."""
    cfg = ctx.obj["config"]

    if cfg.is_remote:
        from solar_eval.cli.client import EvalClient
        client = EvalClient(cfg.remote_url, cfg.timeout)
        datasets = client.get("/api/datasets")
    else:
        # List datasets from project configs
        from solar_eval.core.project_loader import load_all_project_configs
        configs = load_all_project_configs(cfg.projects_dir, cfg.config_dirs)
        seen = set()
        datasets = []
        for c in configs:
            repo = c.get("dataset", {}).get("repo", "")
            for t in c.get("tasks", []):
                path = t.get("dataset_path", "")
                key = f"{repo}:{path}"
                if key not in seen:
                    seen.add(key)
                    datasets.append({"repo": repo, "path": path, "cached": False})

    if not datasets:
        click.secho("No datasets found.", fg="yellow")
        return
    rows = [[d.get("repo", ""), d.get("path", ""), d.get("num_samples", "-"),
             "Yes" if d.get("cached") else "No"] for d in datasets]
    click.secho(tabulate(rows, headers=["Repository", "Path", "Samples", "Cached"], tablefmt="simple"), fg="blue")