first commit

backend/api/routes/sites.py

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+from fastapi import APIRouter
+from pydantic import BaseModel
+
+router = APIRouter()
+
+
+class Site(BaseModel):
+    id: str
+    name: str
+    location: str
+    status: str
+    rack_count: int
+    total_power_kw: float
+    pue: float
+
+
+# Static stub data — will be replaced by DB queries in Phase 2
+SITES: list[Site] = [
+    Site(id="sg-01", name="Singapore DC01", location="Singapore", status="ok",    rack_count=128, total_power_kw=847.0, pue=1.42),
+    Site(id="sg-02", name="Singapore DC02", location="Singapore", status="warning", rack_count=64,  total_power_kw=412.0, pue=1.51),
+    Site(id="lon-01", name="London DC01",   location="London",    status="ok",    rack_count=96,  total_power_kw=631.0, pue=1.38),
+]
+
+
+@router.get("", response_model=list[Site])
+async def list_sites():
+    return SITES
+
+
+@router.get("/{site_id}", response_model=Site)
+async def get_site(site_id: str):
+    for site in SITES:
+        if site.id == site_id:
+            return site
+    from fastapi import HTTPException
+    raise HTTPException(status_code=404, detail="Site not found")