from crewai import Agent, Task, Crew
from crewai_tools.aws.s3 import S3ReaderTool

# Initialize the tool
s3_reader_tool = S3ReaderTool()

# Define an agent that uses the tool
file_reader_agent = Agent(
    role="File Reader",
    goal="Read files from S3 buckets",
    backstory="An expert in retrieving and processing files from cloud storage.",
    tools=[s3_reader_tool],
    verbose=True,
)

# Example task to read a configuration file
read_task = Task(
    description="Read the configuration file from {my_bucket} and summarize its contents.",
    expected_output="A summary of the configuration file contents.",
    agent=file_reader_agent,
)

# Create and run the crew
crew = Crew(agents=[file_reader_agent], tasks=[read_task])
result = crew.kickoff(inputs={"my_bucket": "s3://my-bucket/config/app-config.json"})

# Example of using the tool with an agent
file_reader_agent = Agent(
    role="File Reader",
    goal="Read files from S3 buckets",
    backstory="An expert in retrieving and processing files from cloud storage.",
    tools=[s3_reader_tool],
    verbose=True,
)

# Create a task for the agent to read a specific file
read_config_task = Task(
    description="Read the application configuration file from {my_bucket} and extract the database connection settings.",
    expected_output="The database connection settings from the configuration file.",
    agent=file_reader_agent,
)

# Run the task
crew = Crew(agents=[file_reader_agent], tasks=[read_config_task])
result = crew.kickoff(inputs={"my_bucket": "s3://my-bucket/config/app-config.json"})

class S3ReaderTool(BaseTool):
    name: str = "S3 Reader Tool"
    description: str = "Reads a file from Amazon S3 given an S3 file path"
    
    def _run(self, file_path: str) -> str:
        try:
            bucket_name, object_key = self._parse_s3_path(file_path)

            s3 = boto3.client(
                's3',
                region_name=os.getenv('CREW_AWS_REGION', 'us-east-1'),
                aws_access_key_id=os.getenv('CREW_AWS_ACCESS_KEY_ID'),
                aws_secret_access_key=os.getenv('CREW_AWS_SEC_ACCESS_KEY')
            )

            # Read file content from S3
            response = s3.get_object(Bucket=bucket_name, Key=object_key)
            file_content = response['Body'].read().decode('utf-8')

            return file_content
        except ClientError as e:
            return f"Error reading file from S3: {str(e)}"