暴雨地震灾害链HTTP请求

app/api/rainfall.py

@@ -0,0 +1,83 @@
+"""
+暴雨灾害链预测接口
+"""
+import asyncio
+from typing import List, Dict, Any, Optional
+
+from fastapi import APIRouter, HTTPException
+
+from app.schemas.api_schemas import RainfallPredictRequest, PredictResponse, PredictionItem
+from app.utils.api_deps import get_rainfall_model, get_prediction_semaphore
+from app.repositories.dbn_repository import dbn_repository
+from app.config.paths import get_logger
+
+router = APIRouter(prefix="/rainfall", tags=["暴雨灾害链"])
+logger = get_logger("api.rainfall")
+
+SOURCE_TYPE_MAP = {1: "隐患点", 2: "风险点"}
+LEVEL_MAP = {"低": "低", "中": "中", "较高": "较高", "高": "高"}
+
+
+def _build_prediction_items(results: List[Dict[str, Any]]) -> List[PredictionItem]:
+    """将模型原始结果转换为接口返回格式"""
+    items = []
+    for r in results:
+        probs = r.get("disaster_probabilities", {})
+        levels = r.get("disaster_levels", {})
+
+        if not probs:
+            continue
+
+        max_hazard = max(probs, key=probs.get)
+        items.append(PredictionItem(
+            id=r["point_id"],
+            type=SOURCE_TYPE_MAP.get(r.get("source_type"), "未知"),
+            probability=round(probs[max_hazard], 4),
+            level=LEVEL_MAP.get(levels.get(max_hazard, "none"), "无"),
+        ))
+    return items
+
+
+def _fetch_points(point_ids: Optional[List[int]], region_code: Optional[str]) -> List[Dict[str, Any]]:
+    """获取点位列表"""
+    if point_ids:
+        return dbn_repository.get_points_by_ids(point_ids)
+    return dbn_repository.get_all_points(region_code)
+
+
+def _predict_sync(point_ids: Optional[List[int]], region_code: Optional[str],
+                  rainfall: float, duration: float) -> List[PredictionItem]:
+    """同步执行暴雨预测（在线程池中运行）"""
+    points = _fetch_points(point_ids, region_code)
+    if not points:
+        return []
+
+    model = get_rainfall_model()
+    results = model.predict_multiple_points(points, rainfall=rainfall, duration=duration)
+    return _build_prediction_items(results)
+
+
+@router.post("/predict", response_model=PredictResponse, summary="暴雨灾害链预测")
+async def predict_rainfall(req: RainfallPredictRequest):
+    """
+    根据降雨量和持续时间，批量预测隐患点/风险点的灾害概率和等级。
+
+    - **point_ids**: 点位ID列表（可选，不传则查询所有点）
+    - **region_code**: 行政区划代码（可选，不传则不限区域）
+    - **rainfall**: 累计降雨量(mm)
+    - **duration**: 降雨持续时间(h)
+    """
+    semaphore = get_prediction_semaphore()
+
+    async with semaphore:
+        loop = asyncio.get_event_loop()
+        try:
+            items = await loop.run_in_executor(
+                None, _predict_sync, req.point_ids, req.region_code,
+                req.rainfall, req.duration
+            )
+        except Exception as e:
+            logger.error(f"暴雨预测失败: {e}", exc_info=True)
+            raise HTTPException(status_code=500, detail=f"预测失败: {e}")
+
+    return PredictResponse(code=200, message="success", data=items)