[loop-cycle-1234] refactor: break up _generate_avatar_image (#563) (#589)

src/timmy/mcp_tools.py

@@ -270,20 +270,8 @@ async def create_gitea_issue_via_mcp(title: str, body: str = "", labels: str = "
         return f"Failed to create issue via MCP: {exc}"
 
 
-def _generate_avatar_image() -> bytes:
-    """Generate a Timmy-themed avatar image using Pillow.
-
-    Creates a 512x512 wizard-themed avatar with emerald/purple/gold palette.
-    Returns raw PNG bytes. Falls back to a minimal solid-color image if
-    Pillow drawing primitives fail.
-    """
-    from PIL import Image, ImageDraw
-
-    size = 512
-    img = Image.new("RGB", (size, size), (15, 25, 20))
-    draw = ImageDraw.Draw(img)
-
-    # Background gradient effect — concentric circles
+def _draw_background(draw: "ImageDraw.ImageDraw", size: int) -> None:
+    """Draw radial gradient background with concentric circles."""
     for i in range(size // 2, 0, -4):
         g = int(25 + (i / (size // 2)) * 30)
         draw.ellipse(
@@ -291,33 +279,45 @@ def _generate_avatar_image() -> bytes:
             fill=(10, g, 20),
         )
 
-    # Wizard hat (triangle)
+
+def _draw_wizard(draw: "ImageDraw.ImageDraw") -> None:
+    """Draw wizard hat, face, eyes, smile, monogram, and robe."""
     hat_color = (100, 50, 160)  # purple
-    draw.polygon(
-        [(256, 40), (160, 220), (352, 220)],
-        fill=hat_color,
-        outline=(180, 130, 255),
-    )
+    hat_outline = (180, 130, 255)
+    gold = (220, 190, 50)
+    pupil = (30, 30, 60)
 
-    # Hat brim
-    draw.ellipse([140, 200, 372, 250], fill=hat_color, outline=(180, 130, 255))
+    # Hat + brim
+    draw.polygon([(256, 40), (160, 220), (352, 220)], fill=hat_color, outline=hat_outline)
+    draw.ellipse([140, 200, 372, 250], fill=hat_color, outline=hat_outline)
 
-    # Face circle
+    # Face
     draw.ellipse([190, 220, 322, 370], fill=(60, 180, 100), outline=(80, 220, 120))
 
-    # Eyes
+    # Eyes (whites + pupils)
     draw.ellipse([220, 275, 248, 310], fill=(255, 255, 255))
     draw.ellipse([264, 275, 292, 310], fill=(255, 255, 255))
-    draw.ellipse([228, 285, 242, 300], fill=(30, 30, 60))
-    draw.ellipse([272, 285, 286, 300], fill=(30, 30, 60))
+    draw.ellipse([228, 285, 242, 300], fill=pupil)
+    draw.ellipse([272, 285, 286, 300], fill=pupil)
 
     # Smile
-    draw.arc([225, 300, 287, 355], start=10, end=170, fill=(30, 30, 60), width=3)
+    draw.arc([225, 300, 287, 355], start=10, end=170, fill=pupil, width=3)
 
-    # Stars around the hat
+    # "T" monogram on hat
+    draw.text((243, 100), "T", fill=gold)
+
+    # Robe
+    draw.polygon(
+        [(180, 370), (140, 500), (372, 500), (332, 370)],
+        fill=(40, 100, 70),
+        outline=(60, 160, 100),
+    )
+
+
+def _draw_stars(draw: "ImageDraw.ImageDraw") -> None:
+    """Draw decorative gold stars around the wizard hat."""
     gold = (220, 190, 50)
-    star_positions = [(120, 100), (380, 120), (100, 300), (400, 280), (256, 10)]
-    for sx, sy in star_positions:
+    for sx, sy in [(120, 100), (380, 120), (100, 300), (400, 280), (256, 10)]:
         r = 8
         draw.polygon(
             [
@@ -333,18 +333,26 @@ def _generate_avatar_image() -> bytes:
             fill=gold,
         )
 
-    # "T" monogram on the hat
-    draw.text((243, 100), "T", fill=gold)
 
-    # Robe / body
-    draw.polygon(
-        [(180, 370), (140, 500), (372, 500), (332, 370)],
-        fill=(40, 100, 70),
-        outline=(60, 160, 100),
-    )
+def _generate_avatar_image() -> bytes:
+    """Generate a Timmy-themed avatar image using Pillow.
 
+    Creates a 512x512 wizard-themed avatar with emerald/purple/gold palette.
+    Returns raw PNG bytes. Falls back to a minimal solid-color image if
+    Pillow drawing primitives fail.
+    """
     import io
 
+    from PIL import Image, ImageDraw
+
+    size = 512
+    img = Image.new("RGB", (size, size), (15, 25, 20))
+    draw = ImageDraw.Draw(img)
+
+    _draw_background(draw, size)
+    _draw_wizard(draw)
+    _draw_stars(draw)
+
     buf = io.BytesIO()
     img.save(buf, format="PNG")
     return buf.getvalue()