"""Application constants and compiled regex patterns."""
import re
from pathlib import Path
from typing import Final

# Regex patterns
_TAMIL_RE: Final = re.compile(r"[\u0B80-\u0BFF]")
_ENGLISH_RE: Final = re.compile(r"[a-zA-Z]")

# File paths
_KURAL_FILE: Final = Path("thirukkural_clean.txt")
_CHECKPOINT_FILE: Final = Path("checkpoint_final.pt")

# Generation hyperparameters
_MAX_GENERATION_ATTEMPTS: Final = 15
_MAX_GENERATE_ATTEMPTS: Final = 20
_TEMP_INCREMENT: Final = 0.15
_MAX_TEMP: Final = 2.0
_BASE_TEMP: Final = 1.0
_GENERATE_MAX_TOKENS: Final = 150
_MAX_SEED: Final = 10_000_000