Add AI insights feature

shared/utils/demo_dates.py

@@ -174,42 +174,81 @@ def resolve_time_marker(
         # Just "BASE_TS" - return session_created_at
         return session_created_at
     
-    # Parse operator and value
-    operator = offset_part[0]
-    value_part = offset_part[1:].strip()
+    # Handle complex multi-operation markers like "- 30d 6h + 4h 5m"
+    # Split by operators to handle multiple operations
+    import re
     
-    if operator not in ['+', '-']:
-        raise ValueError(f"Invalid operator in time marker: {time_marker}")
+    # Parse all operations in the format: [operator][value]
+    # Pattern matches: optional whitespace, operator (+/-), number with optional decimal, unit (d/h/m)
+    pattern = r'\s*([+-])\s*(\d+\.?\d*)\s*([dhm])'
+    operations = []
     
-    # Parse time components (supports decimals like 0.5d, 1.25h)
-    days = 0.0
-    hours = 0.0
-    minutes = 0.0
-
-    if 'd' in value_part:
-        # Handle days (supports decimals like 0.5d = 12 hours)
-        day_part, rest = value_part.split('d', 1)
-        days = float(day_part)
-        value_part = rest
-
-    if 'h' in value_part:
-        # Handle hours (supports decimals like 1.5h = 1h30m)
-        hour_part, rest = value_part.split('h', 1)
-        hours = float(hour_part)
-        value_part = rest
-
-    if 'm' in value_part:
-        # Handle minutes (supports decimals like 30.5m)
-        minute_part = value_part.split('m', 1)[0]
-        minutes = float(minute_part)
-
-    # Calculate offset using float values
-    offset = timedelta(days=days, hours=hours, minutes=minutes)
+    # Find all operations in the string
+    for match in re.finditer(pattern, offset_part):
+        operator = match.group(1)
+        value = float(match.group(2))
+        unit = match.group(3)
+        operations.append((operator, value, unit))
     
-    if operator == '+':
-        return session_created_at + offset
-    else:
-        return session_created_at - offset
+    if not operations:
+        # Fallback to old simple parsing for backwards compatibility
+        operator = offset_part[0]
+        value_part = offset_part[1:].strip()
+        
+        if operator not in ['+', '-']:
+            raise ValueError(f"Invalid operator in time marker: {time_marker}")
+        
+        # Parse time components (supports decimals like 0.5d, 1.25h)
+        days = 0.0
+        hours = 0.0
+        minutes = 0.0
+
+        if 'd' in value_part:
+            # Handle days (supports decimals like 0.5d = 12 hours)
+            day_part, rest = value_part.split('d', 1)
+            days = float(day_part)
+            value_part = rest
+
+        if 'h' in value_part:
+            # Handle hours (supports decimals like 1.5h = 1h30m)
+            hour_part, rest = value_part.split('h', 1)
+            hours = float(hour_part)
+            value_part = rest
+
+        if 'm' in value_part:
+            # Handle minutes (supports decimals like 30.5m)
+            minute_part = value_part.split('m', 1)[0]
+            minutes = float(minute_part)
+
+        # Calculate offset using float values
+        offset = timedelta(days=days, hours=hours, minutes=minutes)
+        
+        if operator == '+':
+            return session_created_at + offset
+        else:
+            return session_created_at - offset
+    
+    # Process multiple operations
+    result_time = session_created_at
+    
+    for operator, value, unit in operations:
+        if unit == 'd':
+            offset = timedelta(days=value)
+        elif unit == 'h':
+            offset = timedelta(hours=value)
+        elif unit == 'm':
+            offset = timedelta(minutes=value)
+        else:
+            raise ValueError(f"Invalid time unit '{unit}' in time marker: {time_marker}")
+        
+        if operator == '+':
+            result_time = result_time + offset
+        elif operator == '-':
+            result_time = result_time - offset
+        else:
+            raise ValueError(f"Invalid operator '{operator}' in time marker: {time_marker}")
+    
+    return result_time
 
 
 def shift_to_session_time(