Create weather_service.py

weather_service.py

@@ -0,0 +1,39 @@
+# weather_service.py
+import requests
+
+# 中央氣象署 (CWA) 開放資料平台的授權碼是公開的，可以直接使用
+CWA_AUTH_KEY = "CWA-15722330-8255-4252-9523-28E03C5C764C"
+CWA_WEATHER_API = "https://opendata.cwa.gov.tw/api/v1/rest/datastore/O-A0003-001"
+
+def fetch_weather_by_location(location_name: str) -> str:
+    """根據地點名稱查詢即時天氣資訊。"""
+    params = {
+        "Authorization": CWA_AUTH_KEY,
+        "format": "JSON",
+        "locationName": location_name,
+        "elementName": "TEMP,HUMD,Weather",
+    }
+    try:
+        r = requests.get(CWA_WEATHER_API, params=params, timeout=10)
+        r.raise_for_status()
+        data = r.json()
+
+        if not data.get("records") or not data["records"].get("location"):
+            return f"找不到「{location_name}」的即時天氣資訊，請試試看其他縣市或地區。"
+
+        loc_data = data["records"]["location"][0]
+        elements = {elem["elementName"]: elem["elementValue"] for elem in loc_data["weatherElement"]}
+        
+        temp = elements.get("TEMP", "未知")
+        humidity = float(elements.get("HUMD", -1)) * 100
+        weather_desc = elements.get("Weather", "未知")
+        
+        return (
+            f"📍 {loc_data['locationName']} 即時天氣：\n"
+            f"天氣狀況：{weather_desc}\n"
+            f"溫度：{temp}°C\n"
+            f"相對濕度：{humidity:.0f}%"
+        )
+
+    except Exception as e:
+        return f"❌ 天氣查詢失敗：{e}"