src/components/p5/P5Sketch.tsx

/**
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { SchemaType } from "@google/generative-ai";
import { useEffect, useRef, memo } from "react";
import { useLiveAPIContext } from "../../contexts/LiveAPIContext";
import type { ToolCall } from "../../multimodal-live-types";

// Add type definitions for window functions
declare global {
  interface Window {
    initSketch: (container: HTMLElement) => void;
    updateSketch: (code: string, container: HTMLElement) => boolean;
    removeSketch: () => void;
  }
}

interface SketchArgs {
  sketch: string;
}

function P5SketchComponent() {
  const containerRef = useRef<HTMLDivElement>(null);
  const { client, setConfig } = useLiveAPIContext();

  useEffect(() => {
    if (containerRef.current) {
      window.initSketch(containerRef.current);
    }
    
    // Cleanup on unmount
    return () => {
      window.removeSketch();
    };
  }, []);

  useEffect(() => {
    setConfig({
      model: "models/gemini-2.0-flash-exp",
      generationConfig: {
        temperature: 0.1,
        responseModalities: "audio",
        speechConfig: {
          voiceConfig: {
            prebuiltVoiceConfig: {
              voiceName: "Puck"
            }
          }
        }
      },
      systemInstruction: {
        parts: [
          {
            text: `You are a P5.js creative coding expert that helps users create interactive sketches.

When a user requests a sketch:
1. Always use the updateSketch function to create or modify sketches
2. NEVER output code directly in the response - only use the function
3. After the sketch is created, explain what the sketch does and how to interact with it
4. If the user's request is unclear, just take your best guess to create a sketch

You can create sketches using:
- Basic shapes, colors, and animations
- Mouse and keyboard interaction (mouseX, mouseY, keyPressed, keyCode, etc.)
- Sound effects (p5.sound library)
- Sprite-based games (p5.play library)
- Full window canvas with automatic resizing

Focus on creating visually engaging and interactive experiences. As soon as the user requests a sketch, confirm you heard them, THEN you should create the sketch and then explain what it does and how to interact with it. Be EXTREMELY brief and pithy.`
          },
        ],
      },
      tools: [
        {
          functionDeclarations: [
            {
              name: "updateSketch",
              description: "Create or update the P5.js sketch with new code. The sketch will run in a full-window canvas.",
              parameters: {
                type: SchemaType.OBJECT,
                properties: {
                  sketch: {
                    type: SchemaType.STRING,
                    description: "Complete P5.js sketch code including all variable declarations, setup(), draw(), and any additional functions needed. The code should be a complete, self-contained sketch."
                  }
                },
                required: ["sketch"]
              }
            }
          ],
        },
      ],
    });
  }, [setConfig]);

  useEffect(() => {
    const onToolCall = async (toolCall: ToolCall) => {
      console.log("Received tool call:", toolCall);
      
      for (const fc of toolCall.functionCalls) {
        if (fc.name === "updateSketch" && containerRef.current) {
          const args = fc.args as SketchArgs;
          const result = window.updateSketch(args.sketch, containerRef.current);
          
          // Send the function response back to Gemini
          await client.sendToolResponse({
            functionResponses: [
              {
                response: { 
                  success: result,
                  message: result ? "Sketch updated successfully" : "Failed to update sketch"
                },
                id: fc.id,
              },
            ],
          });
        } else {
          console.error("Unhandled function call:", fc.name);
        }
      }
    };

    client.on("toolcall", onToolCall);
    return () => {
      client.off("toolcall", onToolCall);
    };
  }, [client]);

  return (
    <div
      ref={containerRef}
      style={{
        width: "100%",
        height: "100%",
        alignItems: "center",
        justifyContent: "center",
        display: "flex",
        position: "relative",
        background: "#000"
      }}
    />
  );
}

export const P5Sketch = memo(P5SketchComponent);