"""
Crew setup for NBA data analysis workflow.
"""
import os
import shutil
from crewai import Crew, Process
from agents import create_engineer_agent, create_analyst_agent, create_storyteller_agent
from tasks import create_data_engineering_task, create_data_analysis_task, create_custom_analysis_task, create_storyteller_task


def create_crew() -> Crew:
    """
    Create and configure the CrewAI crew with agents and tasks.
    
    Returns:
        Crew: Configured CrewAI crew ready for execution
    """
    # Create agents
    engineer_agent = create_engineer_agent()
    analyst_agent = create_analyst_agent()
    
    # Create tasks
    data_engineering_task = create_data_engineering_task(engineer_agent)
    data_analysis_task = create_data_analysis_task(analyst_agent, data_engineering_task)
    
    # Create and return the crew
    return Crew(
        agents=[engineer_agent, analyst_agent],
        tasks=[data_engineering_task, data_analysis_task],
        process=Process.sequential,
        verbose=True,
    )


def create_crew_with_custom_task(user_query: str, csv_path: str = None) -> Crew:
    """
    Create a CrewAI crew with engineering task, custom analyst task, and storyteller task.
    
    Args:
        user_query: The user's custom analysis query/task
        csv_path: Optional path to CSV file (if None, uses default from config)
        
    Returns:
        Crew: Configured CrewAI crew ready for execution
    """
    # Create agents (they will use the csv_path from tools)
    engineer_agent = create_engineer_agent(csv_path)
    analyst_agent = create_analyst_agent(csv_path)
    storyteller_agent = create_storyteller_agent()
    
    # Create engineering task (fixed)
    data_engineering_task = create_data_engineering_task(engineer_agent, csv_path)
    
    # Create custom analyst task from user input (no dependency on engineer task for parallel execution)
    custom_analysis_task = create_custom_analysis_task(analyst_agent, user_query, None, csv_path)
    
    # Create storyteller task that uses the analyst's output
    storyteller_task = create_storyteller_task(storyteller_agent, custom_analysis_task)
    
    # Create and return the crew
    return Crew(
        agents=[engineer_agent, analyst_agent, storyteller_agent],
        tasks=[data_engineering_task, custom_analysis_task, storyteller_task],
        process=Process.sequential,
        verbose=True,
    )


def create_flow_crew(user_query: str, csv_path: str) -> Crew:
    """
    Create a single crew with parallel tasks (Engineer and Analyst) that merge results at the end.
    This satisfies the assignment requirement: "Parallelize tasks via a Flow; merge results at the end."
    
    Args:
        user_query: The user's custom analysis query/task
        csv_path: Path to the uploaded CSV file
        
    Returns:
        Crew: Single crew with parallel tasks that will merge results
    """
    # Create all agents
    engineer_agent = create_engineer_agent(csv_path)
    analyst_agent = create_analyst_agent(csv_path)
    storyteller_agent = create_storyteller_agent()
    
    # Create tasks WITHOUT dependencies so they can run in parallel
    # Engineer task - independent
    data_engineering_task = create_data_engineering_task(engineer_agent, csv_path)
    
    # Analyst task - independent (no dependency on engineer for parallel execution)
    custom_analysis_task = create_custom_analysis_task(analyst_agent, user_query, None, csv_path)
    
    # Storyteller task - depends on analyst (runs after analyst completes)
    storyteller_task = create_storyteller_task(storyteller_agent, custom_analysis_task)
    
    # Create a single crew with all tasks
    # Tasks without dependencies will run in parallel
    # Storyteller will run after analyst completes
    return Crew(
        agents=[engineer_agent, analyst_agent, storyteller_agent],
        tasks=[data_engineering_task, custom_analysis_task, storyteller_task],
        process=Process.sequential,  # CrewAI will parallelize independent tasks automatically
        verbose=True,
    )


def create_analysis_only_crew(user_query: str, csv_path: str) -> Crew:
    """
    Create a crew with only Analyst and Storyteller agents (no Engineer).
    Used when engineer results are already available and user asks a new question.
    
    Args:
        user_query: The user's custom analysis query/task
        csv_path: Path to the uploaded CSV file
        
    Returns:
        Crew: Crew with only analyst and storyteller tasks
    """
    # Create only analyst and storyteller agents
    analyst_agent = create_analyst_agent(csv_path)
    storyteller_agent = create_storyteller_agent()
    
    # Create analyst task with user query
    custom_analysis_task = create_custom_analysis_task(analyst_agent, user_query, None, csv_path)
    
    # Storyteller task depends on analyst
    storyteller_task = create_storyteller_task(storyteller_agent, custom_analysis_task)
    
    return Crew(
        agents=[analyst_agent, storyteller_agent],
        tasks=[custom_analysis_task, storyteller_task],
        process=Process.sequential,
        verbose=True,
    )


def create_analyst_only_crew(user_query: str, csv_path: str) -> Crew:
    """
    Create a crew with only Analyst agent (no Engineer, no Storyteller).
    Used for specific user questions where only analysis is needed.
    
    Args:
        user_query: The user's custom analysis query/task
        csv_path: Path to the uploaded CSV file
        
    Returns:
        Crew: Crew with only analyst task
    """
    # Create only analyst agent
    analyst_agent = create_analyst_agent(csv_path)
    
    # Create analyst task with user query
    custom_analysis_task = create_custom_analysis_task(analyst_agent, user_query, None, csv_path)
    
    return Crew(
        agents=[analyst_agent],
        tasks=[custom_analysis_task],
        process=Process.sequential,
        verbose=True,
    )