"""法规浏览 API — /api/laws, /api/law/{law_id}"""
from fastapi import APIRouter, Request, HTTPException, Query
from typing import Optional

from app.services.law_reader import LawReader
from app.config import BROWSE_PAGE_SIZE

router = APIRouter()


@router.get("/laws")
async def list_laws(
    request: Request,
    category: Optional[str] = Query(None, description="法规类别过滤"),
    province: Optional[str] = Query(None, description="省份过滤"),
    keyword: Optional[str] = Query(None, description="法规名关键词"),
    page: int = Query(1, ge=1, description="页码"),
    page_size: int = Query(BROWSE_PAGE_SIZE, ge=1, le=200, description="每页数量"),
):
    """法规列表(分页 + 过滤)"""
    trace_id = getattr(request.state, "trace_id", "")
    reader = LawReader.get_instance()
    result = reader.list_laws(
        category=category,
        province=province,
        keyword=keyword,
        page=page,
        page_size=page_size,
    )
    return {
        "code": 0,
        "message": "ok",
        "data": result,
        "trace_id": trace_id,
    }


@router.get("/law/{law_id}")
async def get_law(law_id: int, request: Request):
    """法规详情(含原文 + 条文列表)"""
    trace_id = getattr(request.state, "trace_id", "")
    reader = LawReader.get_instance()
    detail = reader.get_law(law_id)
    if detail is None:
        raise HTTPException(status_code=404, detail="法规不存在")
    return {
        "code": 0,
        "message": "ok",
        "data": detail,
        "trace_id": trace_id,
    }