import json
from typing import List, Optional

from pydantic.v1 import BaseModel, Field, Json, root_validator

from .agent import Agent
from .process import Process
from .task import Task
from .tools.agent_tools import AgentTools


class Crew(BaseModel):
    """
    Class that represents a group of agents, how they should work together and
    their tasks.
    """

    tasks: Optional[List[Task]] = Field(description="List of tasks")
    agents: Optional[List[Agent]] = Field(description="List of agents in this crew.")
    process: Process = Field(
        description="Process that the crew will follow.", default=Process.sequential
    )
    verbose: bool = Field(
        description="Verbose mode for the Agent Execution", default=False
    )
    config: Optional[Json] = Field(
        description="Configuration of the crew.", default=None
    )

    @root_validator(pre=True)
    def check_config(_cls, values):
        if not values.get("config") and (
            not values.get("agents") and not values.get("tasks")
        ):
            raise ValueError("Either agents and task need to be set or config.")

        if values.get("config"):
            config = json.loads(values.get("config"))
            if not config.get("agents") or not config.get("tasks"):
                raise ValueError("Config should have agents and tasks.")

            values["agents"] = [Agent(**agent) for agent in config["agents"]]

            tasks = []
            for task in config["tasks"]:
                task_agent = [
                    agt for agt in values["agents"] if agt.role == task["agent"]
                ][0]
                del task["agent"]
                tasks.append(Task(**task, agent=task_agent))

            values["tasks"] = tasks
        return values

    def kickoff(self) -> str:
        """
        Kickoff the crew to work on it's tasks.
                Returns:
                        output (List[str]): Output of the crew for each task.
        """
        if self.process == Process.sequential:
            return self.__sequential_loop()

    def __sequential_loop(self) -> str:
        """
        Loop that executes the sequential process.
                Returns:
                        output (str): Output of the crew.
        """
        task_outcome = None
        for task in self.tasks:
            # Add delegation tools to the task if the agent allows it
            if task.agent.allow_delegation:
                tools = AgentTools(agents=self.agents).tools()
                task.tools += tools

            self.__log(f"\nWorking Agent: {task.agent.role}")
            self.__log(f"Starting Task: {task.description} ...")

            task_outcome = task.execute(task_outcome)

            self.__log(f"Task output: {task_outcome}")

        return task_outcome

    def __log(self, message):
        if self.verbose:
            print(message)