"""Path resolution: prefer vendored data (HF Spaces), fall back to sibling repos (local dev)."""
from pathlib import Path

APP_DIR = Path(__file__).resolve().parent
VENDORED = APP_DIR / "data"
REPO_ROOT = APP_DIR.parent
CODE_DIR = REPO_ROOT / "code"

EACL_REPO = CODE_DIR / "EACL2026-historical-languages"
TUTORIAL_REPO = CODE_DIR / "lrec2026-llm-as-annotator-tutorial"


def _pick(vendored: Path, fallback: Path) -> Path:
    """Return whichever exists; vendored wins on HF Spaces, fallback wins locally."""
    return vendored if vendored.exists() else fallback


TAGSETS_DIR = _pick(VENDORED / "tagsets", EACL_REPO / "data" / "tagsets")
CORPUS_DIR = _pick(VENDORED / "corpus", EACL_REPO / "data" / "corpus")
REF_PROMPTS_DIR = _pick(VENDORED / "prompts", EACL_REPO / "data" / "prompt-templates")

TUTORIAL_PROMPTS_DIR = _pick(VENDORED / "prompts", TUTORIAL_REPO / "notebooks" / "prompts")
TUTORIAL_SCHEMAS_DIR = _pick(VENDORED / "schemas", TUTORIAL_REPO / "schemas")
TUTORIAL_HANDOUTS_DIR = _pick(VENDORED / "handouts", TUTORIAL_REPO / "handouts")

LANGUAGES = {
    "GRC": "Ancient Greek",
    "HYE": "Old Armenian",
    "KAT": "Old Georgian",
    "SYC": "Syriac",
}


def tagset_file(lang_code: str) -> Path:
    return TAGSETS_DIR / f"{lang_code}_tagset.txt"


def corpus_file(lang_code: str, split: str = "train") -> Path:
    """split in {'train', 'test_in-domain', 'test_out-of-domain'}. Vendored data has only 'train'."""
    suffix = "train" if split == "train" else "test"
    return CORPUS_DIR / split / f"{lang_code}_{suffix}.tsv"


def read_text(path: Path) -> str:
    return path.read_text(encoding="utf-8")