import math import asyncio import json from typing import List, Optional, Dict, Any from fastapi import APIRouter, HTTPException from fastapi.responses import StreamingResponse from DbKit.Db import Db from Config.Config import DB_URL from Util.LlmUtil import get_llm_response from Model.YltAnalyticsModel import ( StationBase, CompetitorStation, GeoCompetitionResponse, GeoCompetitionSummary, PriceSeries, PriceComparisonResponse, PriceComparisonSummary, ) router = APIRouter() db = Db(db_url=DB_URL) async def init_db(): await db.init_db() async def close_db(): await db.close() @router.get("/api/ylt/stations", response_model=List[StationBase]) async def list_ylt_stations(q: Optional[str] = None): base_sql = """ SELECT p.station_hash, p.operator, p.station_name, p.address, p.coord_x, p.coord_y, s.current_price FROM t_station_profile_scd p LEFT JOIN t_station_status_scd s ON p.station_hash = s.station_hash AND s.is_current = 1 WHERE p.is_current = 1 AND p.operator = '驿来特' """ params: Dict[str, Any] = {} if q: base_sql += " AND (p.station_name LIKE :kw OR p.address LIKE :kw)" params["kw"] = f"%{q}%" base_sql += " ORDER BY p.station_name" rows = await db.find(base_sql, params) result: List[StationBase] = [] for r in rows: result.append( StationBase( station_hash=r.get("station_hash"), operator=r.get("operator"), station_name=r.get("station_name"), address=r.get("address"), coord_x=r.get("coord_x"), coord_y=r.get("coord_y"), current_price=r.get("current_price"), ) ) return result def haversine_km(lon1: float, lat1: float, lon2: float, lat2: float) -> float: r = 6371.0 phi1 = math.radians(lat1) phi2 = math.radians(lat2) d_phi = math.radians(lat2 - lat1) d_lambda = math.radians(lon2 - lon1) a = math.sin(d_phi / 2) ** 2 + math.cos(phi1) * math.cos(phi2) * math.sin(d_lambda / 2) ** 2 c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a)) return r * c async def fetch_current_stations() -> List[dict]: sql = """ SELECT p.station_hash, p.operator, p.station_name, p.address, p.coord_x, p.coord_y, s.current_price FROM t_station_profile_scd p LEFT JOIN t_station_status_scd s ON p.station_hash = s.station_hash AND s.is_current = 1 WHERE p.is_current = 1 """ return await db.find(sql, {}) async def build_geo_competition(station_hash: str, radius_km: float = 3.0) -> GeoCompetitionResponse: rows = await fetch_current_stations() if not rows: raise HTTPException(status_code=404, detail="no station data") base_row = None for r in rows: if r.get("station_hash") == station_hash and r.get("operator") == "驿来特": base_row = r break if base_row is None: raise HTTPException(status_code=404, detail="base station not found for 驿来特") base_lon = base_row.get("coord_x") base_lat = base_row.get("coord_y") if base_lon is None or base_lat is None: raise HTTPException(status_code=400, detail="base station has no coordinates") competitors: List[CompetitorStation] = [] ylt_price = base_row.get("current_price") cheaper = 0 same = 0 more_expensive = 0 min_price: Optional[float] = None max_price: Optional[float] = None for r in rows: if r.get("operator") == "驿来特": continue lon = r.get("coord_x") lat = r.get("coord_y") if lon is None or lat is None: continue dist = haversine_km(base_lon, base_lat, lon, lat) if dist > radius_km: continue price = r.get("current_price") competitors.append( CompetitorStation( station_hash=r.get("station_hash"), operator=r.get("operator"), station_name=r.get("station_name"), distance_km=round(dist, 3), current_price=price, ) ) if price is not None: if min_price is None or price < min_price: min_price = price if max_price is None or price > max_price: max_price = price if ylt_price is not None: if price < ylt_price: cheaper += 1 elif price > ylt_price: more_expensive += 1 else: same += 1 base_station = StationBase( station_hash=base_row.get("station_hash"), operator=base_row.get("operator"), station_name=base_row.get("station_name"), address=base_row.get("address"), coord_x=base_lon, coord_y=base_lat, current_price=ylt_price, ) return GeoCompetitionResponse( base_station=base_station, competitors=competitors, ylt_price=ylt_price, min_competitor_price=min_price, max_competitor_price=max_price, cheaper_count=cheaper, same_count=same, more_expensive_count=more_expensive, ) async def fetch_station_schedule_json(station_hash: str) -> Optional[str]: sql = """ SELECT schedule_json FROM t_station_price_schedule_scd WHERE station_hash = :h AND is_current = 1 ORDER BY valid_start_time DESC LIMIT 1 """ rows = await db.find(sql, {"h": station_hash}) if not rows: return None value = rows[0].get("schedule_json") if value is None: return None if isinstance(value, str): return value try: return json.dumps(value, ensure_ascii=False) except Exception: return None def extract_price_from_item(item: Dict[str, Any]) -> Optional[float]: if not isinstance(item, dict): return None for key in ("price", "price_kwh", "priceKwh", "total_price", "totalPrice"): v = item.get(key) if isinstance(v, (int, float)): return float(v) elec = item.get("elec_price") service = item.get("service_price") if isinstance(elec, (int, float)) and isinstance(service, (int, float)): return float(elec) + float(service) elec2 = item.get("electric_fee_kwh") service2 = item.get("service_fee_kwh") if isinstance(elec2, (int, float)) and isinstance(service2, (int, float)): return float(elec2) + float(service2) elec3 = item.get("ele_fee") service3 = item.get("ser_fee") if isinstance(elec3, (int, float)) and isinstance(service3, (int, float)): return float(elec3) + float(service3) return None def parse_hour_from_item(item: Dict[str, Any], default_index: int) -> Optional[int]: start = item.get("start") if isinstance(start, str) and ":" in start: parts = start.split(":") try: h = int(parts[0]) if 0 <= h <= 23: return h except Exception: pass end = item.get("end") if isinstance(end, str) and ":" in end: parts = end.split(":") try: h2 = int(parts[0]) if 0 < h2 <= 24: return h2 - 1 except Exception: pass if 0 <= default_index <= 23: return default_index return None def extract_hourly_prices(schedule_json_str: str) -> List[Optional[float]]: series: List[Optional[float]] = [None] * 24 if not schedule_json_str: return series try: data = json.loads(schedule_json_str) except Exception: return series if not isinstance(data, list): return series for idx, item in enumerate(data): price = extract_price_from_item(item) if price is None: continue hour_idx = parse_hour_from_item(item, idx) if hour_idx is None or not (0 <= hour_idx < 24): continue series[hour_idx] = float(price) return series async def build_price_comparison(station_hash: str) -> PriceComparisonResponse: geo = await build_geo_competition(station_hash) base_station = geo.base_station base_schedule_str = await fetch_station_schedule_json(base_station.station_hash) if base_schedule_str is None: raise HTTPException(status_code=404, detail="no price schedule for YLT station") ylt_series = extract_hourly_prices(base_schedule_str) hours = list(range(24)) operator_series_sum: Dict[str, List[float]] = {} operator_series_count: Dict[str, List[int]] = {} for comp in geo.competitors: schedule_str = await fetch_station_schedule_json(comp.station_hash) if not schedule_str: continue series = extract_hourly_prices(schedule_str) op = comp.operator if op not in operator_series_sum: operator_series_sum[op] = [0.0] * 24 operator_series_count[op] = [0] * 24 sums = operator_series_sum[op] counts = operator_series_count[op] for i in range(24): v = series[i] if v is None: continue sums[i] += v counts[i] += 1 competitors_series: List[PriceSeries] = [] for op, sums in operator_series_sum.items(): counts = operator_series_count[op] avg_series: List[Optional[float]] = [] for i in range(24): c = counts[i] if c > 0: avg_series.append(sums[i] / c) else: avg_series.append(None) competitors_series.append(PriceSeries(operator=op, series=avg_series)) diffs: List[float] = [] for i in range(24): y = ylt_series[i] if y is None: continue competitor_prices: List[float] = [] for s in competitors_series: v = s.series[i] if v is not None: competitor_prices.append(float(v)) if not competitor_prices: continue min_comp = min(competitor_prices) diffs.append(y - min_comp) min_diff = min(diffs) if diffs else None max_diff = max(diffs) if diffs else None avg_diff = sum(diffs) / len(diffs) if diffs else None ylt_price_series = PriceSeries(operator=base_station.operator, series=ylt_series) return PriceComparisonResponse( hours=hours, ylt=ylt_price_series, competitors=competitors_series, min_diff=min_diff, max_diff=max_diff, avg_diff=avg_diff, ) @router.get("/health") async def health(): return {"status": "ok"} @router.get("/api/ylt/geo/competitors/{station_hash}", response_model=GeoCompetitionResponse) async def get_geo_competitors(station_hash: str): return await build_geo_competition(station_hash) @router.get("/api/ylt/geo/competitors/{station_hash}/summary", response_model=GeoCompetitionSummary) async def get_geo_competitors_summary(station_hash: str): data = await build_geo_competition(station_hash) base = data.base_station total_comp = len(data.competitors) cheaper = data.cheaper_count same = data.same_count more_expensive = data.more_expensive_count ylt_price = data.ylt_price min_price = data.min_competitor_price max_price = data.max_competitor_price summary_input = { "station_name": base.station_name, "operator": base.operator, "ylt_price": ylt_price, "competitor_count": total_comp, "cheaper_count": cheaper, "same_count": same, "more_expensive_count": more_expensive, "min_competitor_price": min_price, "max_competitor_price": max_price, } text = ( "请作为驿来特价格策略分析顾问，用简明中文解释当前场站在3公里范围内的价格竞争情况，" "给出可操作的价格调整或产品策略建议，控制在300字以内。以下是结构化数据：\n" f"{summary_input}" ) chunks: List[str] = [] async for chunk in get_llm_response( text, stream=False, system_prompt="你是驿来特电价和选址策略顾问。", ): chunks.append(chunk) summary_text = "".join(chunks) return GeoCompetitionSummary(summary=summary_text) @router.get("/api/ylt/pricing/comparison/{station_hash}", response_model=PriceComparisonResponse) async def get_price_comparison(station_hash: str): return await build_price_comparison(station_hash) @router.get("/api/ylt/pricing/comparison/{station_hash}/summary", response_model=PriceComparisonSummary) async def get_price_comparison_summary(station_hash: str): data = await build_price_comparison(station_hash) ylt_series = data.ylt.series text_data = { "hours": data.hours, "ylt_prices": ylt_series, "competitors": [ {"operator": s.operator, "series": s.series} for s in data.competitors ], "min_diff": data.min_diff, "max_diff": data.max_diff, "avg_diff": data.avg_diff, } text = ( "请作为驿来特价格策略分析顾问，对下列分时电价数据进行比较分析：\n" "1) 解释驿来特与三家竞品在一天24小时内的价格差距特征；\n" "2) 指出在哪些时间段我们明显偏贵、在哪些时间段有优势；\n" "3) 给出2到3条可执行的调价或营销策略建议；\n" "控制在400字以内。数据如下：\n" f"{text_data}" ) chunks: List[str] = [] async for chunk in get_llm_response( text, stream=False, system_prompt="你是驿来特电价策略分析顾问。", ): chunks.append(chunk) summary_text = "".join(chunks) return PriceComparisonSummary(summary=summary_text) @router.get("/api/ylt/pricing/comparison/{station_hash}/sse") async def stream_price_comparison_summary(station_hash: str): data = await build_price_comparison(station_hash) text_data = { "hours": data.hours, "ylt_prices": data.ylt.series, "competitors": [ {"operator": s.operator, "series": s.series} for s in data.competitors ], "min_diff": data.min_diff, "max_diff": data.max_diff, "avg_diff": data.avg_diff, } text = ( "请作为驿来特价格策略分析顾问，对下列分时电价数据进行比较分析：\n" "1) 解释驿来特与三家竞品在一天24小时内的价格差距特征；\n" "2) 指出在哪些时间段我们明显偏贵、在哪些时间段有优势；\n" "3) 给出2到3条可执行的调价或营销策略建议；\n" "控制在400字以内。数据如下：\n" f"{text_data}" ) async def event_generator(): async for chunk in get_llm_response( text, stream=True, system_prompt="你是驿来特电价策略分析顾问。", ): if chunk is None: continue yield f"data: {chunk}\n\n" yield "event: end\ndata: [DONE]\n\n" return StreamingResponse(event_generator(), media_type="text/event-stream")