updated the architecture

app/services/scoring.py

@@ -0,0 +1,42 @@
+from app.schemas.scan import Issue, LayerStatus
+
+SEVERITY_WEIGHTS: dict[str, int] = {
+    "Critical": 15,
+    "Warning": 5,
+    "Info": 2,
+}
+
+LAYER_NAMES = [
+    "Transport Layer",
+    "SSL/TLS Layer",
+    "Server Config Layer",
+    "Cookie Security",
+    "Exposure Layer",
+]
+
+
+def calculate_score(issues: list[Issue]) -> int:
+    score = 100
+    for issue in issues:
+        score -= SEVERITY_WEIGHTS.get(issue.severity, 0)
+    return max(score, 0)
+
+
+def calculate_layer_statuses(issues: list[Issue]) -> dict[str, LayerStatus]:
+    layers: dict[str, LayerStatus] = {
+        name: LayerStatus(issues=0, status="green") for name in LAYER_NAMES
+    }
+
+    for issue in issues:
+        if issue.layer in layers:
+            layers[issue.layer].issues += 1
+
+    for layer in layers.values():
+        if layer.issues == 0:
+            layer.status = "green"
+        elif layer.issues < 3:
+            layer.status = "yellow"
+        else:
+            layer.status = "red"
+
+    return layers