From 74c6a1930245b25a314cc6321357b19ce9222c5a Mon Sep 17 00:00:00 2001
From: "Peter J. Holzer" <hjp@hjp.at>
Date: Tue, 27 Dec 2022 10:54:19 +0100
Subject: [PATCH] Implement descending criticality thresholds

---
 dashboard.py | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/dashboard.py b/dashboard.py
index 968c684..f4167e7 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -77,7 +77,29 @@ class Widget:
                 return f"hsl(0, 100%, {brightness}%)"
         else:
             log.debug("the other side")
-            return "#CCC"
+            if self.lastvalue > self.stops[0]:
+                log.debug("definitely ok")
+                return f"hsl(120, 100%, {brightness}%)"
+            elif self.lastvalue > self.stops[1]:
+                log.debug("mostly ok")
+                hue = 120 - round(
+                                (self.lastvalue - self.stops[0])
+                              / (self.stops[1] - self.stops[0])
+                              * 60
+                            )
+                return f"hsl({hue}, 100%, {brightness}%)"
+            elif self.lastvalue > self.stops[2]:
+                log.debug("maybe fail")
+                hue =  60 - round(
+                                (self.lastvalue - self.stops[1])
+                              / (self.stops[2] - self.stops[1])
+                              * 60
+                            )
+                return f"hsl({hue}, 100%, {brightness}%)"
+            else:
+                log.debug("definitely fail")
+                return f"hsl(0, 100%, {brightness}%)"
+
 
 class TimeSeries(Widget):
     def __init__(self, d):
@@ -94,6 +116,7 @@ class Gauge(Widget):
     @property
     def gaugepos(self):
         max_value = max([d[1] for d in self.lts.data])
+        max_value = max(max_value, 1) # ensure positive
         log.debug("max_value = %s", max_value)
         return self.lastvalue / max_value * self.gaugesize