app.py

import gradio as gr
import os
from crewai import Agent, LLM, Task, Crew, Process
from crewai_tools import SerperDevTool

serper_api_key = os.getenv("SERPER_API_KEY")


llm=LLM(
    model="gemini/gemini-2.5-flash",
    api_key=os.getenv("Gemini_API_key")
)


search_tool = SerperDevTool(api_key=serper_api_key)


game_desiner = Agent(
    role="Creative Game Designer",
    goal="Come up with fun, feasible game concepts and detailed mechanics based on user idea",
    backstory=(
        "You are an experienced game designer."
        "You excel at turning vague ideas into clear, exciting game designs including:"
        "- core loop, rules, win/lose conditions"
        "- basic entities (player, enemies, items)"
        "- controls and feel"
        "Keep it simple enough to implement in pure Python + Pygame in one file."
    ),
    llm=llm,
    verbose=True,
)

senior_python_developer = Agent(
    role="Senior Python Game Developer",
    goal="Write clean, working Python code (using Pygame) for the described game",
    backstory=(
        "You are a senior software engineer specialized in Python game development with Pygame."
        "You write structured, readable code with:"
        "- Proper game loop, event handling, drawing"
        "- Comments explaining key parts"
        "- Error handling where needed"
        "You always produce a complete, runnable .py file."
    ),
    llm=llm,
    tools=[search_tool],
    verbose=True,
)

qa_engineer = Agent(
    role="QA Engineer & Code Reviewer",
    goal="Test, review, and improve the code for bugs, playability, and completeness",
    backstory=(
        "You are a meticulous QA engineer and code reviewer."
        "You carefully check:"
        "- Does the code run without errors?"
        "- Does it implement ALL the designed features?"
        "- Is it fun/playable? Any obvious balance issues?"
        "- Code style, variable names, comments"
        "Suggest fixes or small improvements and output the FINAL improved code."
    ),
    llm=llm,
    verbose=True,
)


task_design = Task(
    description=(
        "Take the user's game idea: {game_idea}"
        "1. Clarify and expand it into a fun, simple 2D game"
        "2. Describe: objective, controls, entities, win/lose"
        "3. Keep scope small (one level, basic mechanics)"
        "Output format:"
        "## Game Design Document\n"
        "- Title: ...\n"
        "- Genre: ...\n"
        "- Objective: ...\n"
        "- Controls: ...\n"
        "- Entities: ...\n"
        "- Mechanics: ..."
    ),
    expected_output="A clear markdown game design document",
    agent=game_desiner,
)

task_code = Task(
    description=(
        "Using the game design from the previous task"
        "Write a COMPLETE, standalone Python script using Pygame that implements the game."
        "- Include import pygame, sys, random (if needed)"
        "- Full game loop, init, events, update, draw"
        "- Make it runnable with python game.py"
        "- Add simple comments"
        "- The main game loop must be exposed in the python code, it should not be inside any function like main"
        "- Final answer MUST be ONLY the Python code and Instructions on how to play the game"
    ),
    expected_output="A complete runnable python script",
    agent=senior_python_developer,
)

task_review = Task(
    description=(
        "Review the Python code from the previous task."
        "1. Check for syntax/runtime errors"
        "2. Verify it matches the design document"
        "3. Test mentally: does it have init, loop, quit handling, drawing?"
        "4. Suggest fixes/improvements if needed"
        "5. Output the FINAL, improved, ready-to-run code"
        "Your final answer MUST be ONLY the complete Python code along with the instructions on how to play the game"
    ),
    expected_output="Final Polished, runnable pygame python script and instructions on how to play the game",
    agent=qa_engineer,
    context=[task_design, task_code],
)


game_crew = Crew(
    agents=[game_desiner, senior_python_developer, qa_engineer],
    tasks=[task_design, task_code, task_review],
    process=Process.sequential,
    verbose=True,
)


async def generate_game_code(game_idea: str) -> str:
    """Generates game code based on the provided game idea using CrewAI."""
    if not game_idea:
        return "Please enter a game idea to generate code."
    try:
        result = await game_crew.kickoff_async(inputs={"game_idea": game_idea})
        return result
    except Exception as e:
        return f"An error occurred: {e}"


custom_css = """
body { background-color: #1a1a2e; color: #e0e0e0; }
.gradio-container { background-color: #16213e; border-radius: 10px; }
.panel-nav { background-color: #0f3460; }
.block-title { color: #e94560; }
.label { color: #e0e0e0; }
.input-textbox textarea { background-color: #0f3460; color: #e0e0e0; border: 1px solid #e94560; }
.output-textbox textarea { background-color: #0f3460; color: #e0e0e0; border: 1px solid #e94560; }
.gr-button { background-color: #e94560; color: white; border: none; padding: 10px 20px; border-radius: 5px; cursor: pointer; transition: background-color 0.3s ease; }
.gr-button:hover { background-color: #ba324d; }
"""


demo = gr.Interface(
    fn=generate_game_code,
    inputs=gr.Textbox(lines=2, label="Enter your game idea", placeholder="e.g., A fun endless runner where a character jumps over obstacles"),
    outputs=gr.Textbox(lines=15, label="Generated Game Code and Instructions"),
    title="<h1 style='color:#e94560;'>Game Creator AI</h1>",
    description="<p style='color:#e0e0e0;'>Enter your game idea below and let AI design, code, and review a simple Pygame project for you and gives the Python code and Instructions of the Game .</p>",
    css=custom_css
)

demo.launch(server_name="0.0.0.0", server_port=7860)