"""Repository path helpers (config, databases, ONNX artifacts under ``data/``)."""

from __future__ import annotations

from pathlib import Path


def project_root() -> Path:
    """Return the chess-tutor repository root (parent of ``src/``)."""
    return Path(__file__).resolve().parents[2]


def data_dir() -> Path:
    return project_root() / "data"


def docs_dir() -> Path:
    return project_root() / "docs"


def config_dir() -> Path:
    return data_dir() / "config"


def default_playstyle_llm_grounding_path() -> Path:
    """Generated static context for Gemma coaching narratives."""
    return docs_dir() / "playstyle_llm_grounding.md"


def db_dir() -> Path:
    path = data_dir() / "db"
    path.mkdir(parents=True, exist_ok=True)
    return path


def models_dir() -> Path:
    """Trained models root (per-DB subfolders under ``data/models/<db_stem>/``)."""
    path = data_dir() / "models"
    path.mkdir(parents=True, exist_ok=True)
    return path


def models_dir_for_db(db_path: Path | str) -> Path:
    """
    Model artifacts for one player-moves SQLite file.

    Example: ``data/db/player_moves_alice_lichess.db`` → ``data/models/player_moves_alice_lichess/``.
    """
    stem = Path(db_path).stem
    path = models_dir() / stem
    path.mkdir(parents=True, exist_ok=True)
    return path


def onnx_dir() -> Path:
    """Generated / runtime ONNX models (probed LC0 graph, etc.)."""
    path = data_dir() / "onnx"
    path.mkdir(parents=True, exist_ok=True)
    return path


def default_onnx_config_path() -> Path:
    return config_dir() / "onnx_config.yaml"


def default_positions_db_path() -> Path:
    return db_dir() / "positions.db"


def default_positions_duplicate_db_path() -> Path:
    return db_dir() / "positions_duplicate.db"


def default_probed_onnx_path() -> Path:
    return onnx_dir() / "network_probed.onnx"


def default_player_playstyle_db_path(username: str, platform: str) -> Path:
    """Default SQLite path for :mod:`chess_tutor.build_player_playstyle_db`."""
    from chess_tutor.playstyle_db import default_player_playstyle_db_path as _fn

    return _fn(username, platform)


def default_cohort_playstyle_db_path(platform: str) -> Path:
    """Shared cohort SQLite path for many players on one site."""
    from chess_tutor.playstyle_db import default_cohort_playstyle_db_path as _fn

    return _fn(platform)


def default_cohort_dir() -> Path:
    """
    Root for cohort pipeline artifacts (selected games, move records, features).

    Layout: ``data/cohort/``
    """
    path = data_dir() / "cohort"
    path.mkdir(parents=True, exist_ok=True)
    return path


def default_cohort_db_path(corpus_id: str) -> Path:
    """Default SQLite path for cohort L1–L5 and playstyle coaching train."""
    return default_cohort_dir() / f"{corpus_id}.db"


def default_web_artifacts_dir() -> Path:
    """Root for web UI precomputed artifacts (graphs, cohort embeddings)."""
    path = data_dir() / "web_artifacts"
    path.mkdir(parents=True, exist_ok=True)
    return path


def default_cohort_web_artifacts_dir(corpus_id: str) -> Path:
    """Per-corpus_id folder for web UI precomputed artifacts."""
    path = default_web_artifacts_dir() / "cohort" / corpus_id
    path.mkdir(parents=True, exist_ok=True)
    return path


def default_web_pca_artifacts_path(corpus_id: str) -> Path:
    """Artifacts for cohort→PCA transform + precomputed PCA coordinates."""
    return default_cohort_web_artifacts_dir(corpus_id) / "embedding_pca.joblib"


def default_web_tsne_artifacts_path(corpus_id: str) -> Path:
    """Artifacts for precomputed cohort t-SNE coordinates."""
    return default_cohort_web_artifacts_dir(corpus_id) / "embedding_tsne.joblib"


def default_web_style_artifacts_path(corpus_id: str) -> Path:
    """Artifacts for cohort style z-scores and style→percentile mapping."""
    return default_cohort_web_artifacts_dir(corpus_id) / "style_cohort.joblib"


def default_mlflow_tracking_uri() -> str:
    """Local MLflow tracking store under ``data/mlruns``."""
    path = data_dir() / "mlruns"
    path.mkdir(parents=True, exist_ok=True)
    return path.as_uri()


def default_lichess_inference_test_users_path() -> Path:
    """Default Lichess username list for inference batch smoke tests."""
    return data_dir() / "inference" / "lichess_test_users.txt"


def default_chesscom_inference_test_users_path() -> Path:
    """Default Chess.com username list for inference batch smoke tests."""
    return data_dir() / "inference" / "chesscom_inference_test_users.txt"


def default_inference_test_users_path(site: str = "lichess") -> Path:
    """Site-appropriate default username list for ``--use-test-users``."""
    key = site.strip().lower().replace(" ", "")
    if key in ("chess.com", "chesscom", "chess-com"):
        return default_chesscom_inference_test_users_path()
    return default_lichess_inference_test_users_path()


def default_site_rating_comparison_xlsx_path() -> Path:
    """Cross-site rating comparison table (Chess.com vs Lichess pools)."""
    return data_dir() / "inference" / "site_and_tc_rating_comparison.xlsx"


def default_chesscom_lichess_rapid_model_path() -> Path:
    """Fitted Chess.com rapid → Lichess rapid linear model for inference."""
    return data_dir() / "inference" / "chesscom_lichess_rapid_linear.joblib"


def default_lichess_aix_dir() -> Path:
    """
    Root for Hugging Face ``thomasd1/aix-lichess-database`` monthly Parquet files.

    Layout: ``data/lichess-aix/low_compression/aix_lichess_YYYY-MM_low.parquet``
    """
    path = data_dir() / "lichess-aix"
    path.mkdir(parents=True, exist_ok=True)
    return path


def default_lichess_puzzles_dir() -> Path:
    """
    Root for Hugging Face ``Lichess/chess-puzzles`` Parquet shards.

    Layout: ``data/lichess-puzzles/data/train-00000-of-00003.parquet`` (etc.)
    """
    path = data_dir() / "lichess-puzzles"
    path.mkdir(parents=True, exist_ok=True)
    return path


def default_lichess_parquet_dir() -> Path:
    """
    Root for legacy Hugging Face ``Lichess/standard-chess-games`` hive Parquet shards.

    Layout: ``data/lichess-parquet/data/year=YYYY/month=MM/train-*.parquet``

    The cohort L1 pipeline uses :func:`default_lichess_aix_dir` instead.
    """
    path = data_dir() / "lichess-parquet"
    path.mkdir(parents=True, exist_ok=True)
    return path