#!/usr/bin/env python3
"""Upload selected workspace artifacts to a Hugging Face dataset repository.

The script is intentionally conservative: dry-run mode never imports
``huggingface_hub``, empty targets are skipped, and result targets are resolved from
``/root`` while source/code targets are resolved from ``/workspace``.
"""

from __future__ import annotations

import argparse
import getpass
import os
from pathlib import Path

WORKSPACE_ROOT = Path(os.environ.get("VSI_WORKSPACE_ROOT", "/workspace"))
RESULTS_HOST_ROOT = Path(os.environ.get("VSI_RESULTS_HOST_ROOT", "/root"))
DEFAULT_REPO = os.environ.get("VSI_BACKUP_REPO", "AntonioJun/workspace")

TARGETS = {
    "code": [
        "README.md",
        "setup.sh",
        "backup.py",
        "analysis",
        "encoder",
        "harness",
        "inference",
        "symbolic",
        "tests",
        "selective_frame_counts.csv",
    ],
    "reports": ["reports"],
    "spatial-codes": ["data/spatial codes", "bundles/spatial-codes.tar.gz"],
    "caches": ["data/caches"],
    "A": ["results/A"],
    "B": ["results/B"],
    "C": ["results/C"],
    "F": ["results/F"],
}


def _resolve_targets(target):
    if target == "all":
        return list(TARGETS)
    requested = [part.strip() for part in str(target).split(",") if part.strip()]
    unknown = [name for name in requested if name not in TARGETS]
    if unknown:
        raise ValueError(f"unknown target(s): {', '.join(unknown)}")
    return requested


def _local_path(relative):
    relative = str(relative).lstrip("/")
    root = RESULTS_HOST_ROOT if relative.startswith("results/") else WORKSPACE_ROOT
    return root / relative


def _has_files(path):
    path = Path(path)
    if path.is_file():
        return True
    if path.is_dir():
        return any(child.is_file() for child in path.rglob("*"))
    return False


def _target_root(relatives):
    roots = {
        "results" if str(rel).lstrip("/").startswith("results/") else "workspace"
        for rel in relatives
    }
    if len(roots) > 1:
        raise ValueError(
            f"target mixes incompatible workspace/results roots: {relatives}"
        )
    return RESULTS_HOST_ROOT if "results" in roots else WORKSPACE_ROOT


def _path_in_repo(relative):
    return str(relative).lstrip("/")


def backup(repo_id=DEFAULT_REPO, target="all", dry_run=False, token=None):
    selected = _resolve_targets(target)
    uploaded = []
    for name in selected:
        relatives = TARGETS[name]
        _target_root(relatives)
        existing = [(relative, _local_path(relative)) for relative in relatives]
        existing = [(relative, path) for relative, path in existing if _has_files(path)]
        if not existing:
            print(f"[{name}] skipped: no files found")
            continue
        uploaded.append(name)
        if dry_run:
            for relative, path in existing:
                print(
                    f"[{name}] would upload {path} -> {repo_id}/{_path_in_repo(relative)}"
                )
            continue
        from huggingface_hub import HfApi

        api = HfApi(token=token)
        for relative, path in existing:
            repo_path = _path_in_repo(relative)
            if path.is_dir():
                api.upload_folder(
                    folder_path=str(path),
                    repo_id=repo_id,
                    repo_type="dataset",
                    path_in_repo=repo_path,
                )
            else:
                api.upload_file(
                    path_or_fileobj=str(path),
                    repo_id=repo_id,
                    repo_type="dataset",
                    path_in_repo=repo_path,
                )
            print(f"[{name}] uploaded {path} -> {repo_id}/{repo_path}")
    return uploaded


def main(argv=None):
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument(
        "target", nargs="?", default="all", help="target name, comma list, or all"
    )
    parser.add_argument("--repo", default=DEFAULT_REPO)
    parser.add_argument(
        "--token",
        default=os.environ.get("HF_TOKEN") or os.environ.get("HUGGING_FACE_HUB_TOKEN"),
    )
    parser.add_argument("--dry-run", action="store_true")
    args = parser.parse_args(argv)
    token = args.token
    if not args.dry_run and not token:
        token = getpass.getpass("HF token: ")
    backup(args.repo, args.target, dry_run=args.dry_run, token=token)


if __name__ == "__main__":
    main()