from typing import List, Dict, Any
from dataclasses import dataclass, field, asdict


@dataclass
class Chunk:
    chunk_id: int
    doc_id: str
    text: str
    tokens: int
    dataset_id: int
    topic: str = ""
    domain: str = ""
    task_type: str = ""
    topic_purity: float = 1.0
    text_type: int = 1
    summary: str = ""
    status: int = 1
    keywords: List[str] = field(default_factory=list)
    concepts: List[str] = field(default_factory=list)
    questions: List[str] = field(default_factory=list)
    entities: List[str] = field(default_factory=list)


@dataclass
class ChunkerConfig:
    target_tokens: int = 256
    max_tokens: int = 2048
    min_tokens: int = 64
    boundary_threshold: float = 0.8
    min_sent_per_chunk: int = 3
    max_sent_per_chunk: int = 10
    enable_adaptive_boundary: bool = True
    enable_kg: bool = True
    topic_purity_floor: float = 0.8
    kg_topk: int = 3