"""
crew.py — NeuralDocs Agentic RAG
---------------------------------
Assembles the CrewAI crew from config files and registered tools.
Written from scratch for the NeuralDocs project.
"""

from crewai import Agent, Crew, Process, Task
from crewai.project import CrewBase, agent, crew, task
from crewai_tools import SerperDevTool
from src.agentic_rag.tools.custom_tool import DocumentSearchTool


@CrewBase
class NeuralDocsCrew:
    """
    Two-agent crew for Agentic RAG:
      1. retriever_agent   — searches document then web
      2. response_synthesizer_agent — writes the final answer
    """

    agents_config = "config/agents.yaml"
    tasks_config  = "config/tasks.yaml"

    def __init__(self, file_path: str | None = None):
        """
        Args:
            file_path: Path to the uploaded document. If None, the crew
                       operates in web-search-only mode.
        """
        super().__init__()
        self._doc_tool = DocumentSearchTool(file_path=file_path) if file_path else None
        self._web_tool = SerperDevTool()

    # ── Agents ──────────────────────────────────────────────────────────────

    @agent
    def retriever_agent(self) -> Agent:
        tools = [t for t in [self._doc_tool, self._web_tool] if t]
        return Agent(
            config=self.agents_config["retriever_agent"],
            tools=tools,
            verbose=True,
            allow_delegation=False,
        )

    @agent
    def response_synthesizer_agent(self) -> Agent:
        return Agent(
            config=self.agents_config["response_synthesizer_agent"],
            verbose=True,
            allow_delegation=False,
        )

    # ── Tasks ────────────────────────────────────────────────────────────────

    @task
    def retrieval_task(self) -> Task:
        return Task(config=self.tasks_config["retrieval_task"])

    @task
    def synthesis_task(self) -> Task:
        return Task(config=self.tasks_config["synthesis_task"])

    # ── Crew ─────────────────────────────────────────────────────────────────

    @crew
    def crew(self) -> Crew:
        return Crew(
            agents=self.agents,
            tasks=self.tasks,
            process=Process.sequential,
            verbose=True,
        )