"""Basic usage example for pydantic-deep.

This example demonstrates the core functionality:
- Creating a deep agent
- Using the todo toolset for planning
- Using the filesystem toolset for file operations
"""

import asyncio

from pydantic_deep import DeepAgentDeps, StateBackend, create_deep_agent


async def main():
    # Create a deep agent with default settings
    agent = create_deep_agent(
        model="anthropic:claude-sonnet-4-6",
        instructions="""
        You are a helpful coding assistant.
        When given a task:
        1. Break it down into steps using the todo list
        2. Work through each step methodically
        3. Save your work to files
        """,
    )

    # Create dependencies with in-memory storage
    deps = DeepAgentDeps(backend=StateBackend())

    # Run the agent
    result = await agent.run(
        "Create a simple Python calculator module with add, subtract, multiply, "
        "and divide functions. Save it to /calculator.py",
        deps=deps,
    )

    print("Agent output:")
    print(result.output)

    # Check what files were created
    print("\nFiles in memory:")
    for path, data in deps.files.items():
        print(f"  {path}: {len(data['content'])} lines")

    # Read the created file
    content = deps.backend.read("/calculator.py")
    print("\nCreated file content:")
    print(content)


if __name__ == "__main__":
    asyncio.run(main())