from fastapi import FastAPI , UploadFile , File , Form 
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from my_agent.agent import build_graph
import pandas as pd
from typing import Optional , List
from my_agent.utils.initial_interaction import BusinessInteractionChatbot
from my_agent.utils.utils import encode_image_to_base64 , generate_final_story, generate_image


import json

# Store brainstorming results per thread_id

app = FastAPI()
interaction_chatbot = BusinessInteractionChatbot()
graph = build_graph()


stored_data={}

class UserMessage(BaseModel):
    message: str
@app.post("/business-interaction")
def business_chat(msg: UserMessage):
    response = interaction_chatbot.chat(msg.message)
    if interaction_chatbot.is_complete(response):
        details = interaction_chatbot.extract_details()
        stored_data['business_details'] = details
        return {"response": response, "business_details": details, "complete": True}
    return {"response": response, "complete": False}



@app.post("/brainstrom")
def run_graph(
    query: List[str],  # sent as JSON body
    preferred_topics: Optional[list] = [],
    images: Optional[List[UploadFile]] = [],  # ✅ Optional UploadFile list
    thread_id: Optional[str] = "default-session",
):
    # Convert uploaded images to base64
    image_base64_list = [encode_image_to_base64(img) for img in images]

    # Invoke LangGraph
    result = graph.invoke({
        'topic': query,
        'images': image_base64_list,
        'latest_preferred_topics':preferred_topics,
        # 'business_details': stored_data['business_details']
    },
    config={"configurable": {"thread_id": thread_id}})
    stored_data['brainstroming_response']=result
    # brainstorm_store[thread_id] = result

    return {
        'response': result,
    }


@app.post("/generate-final-story")
def generate_final_story_endpoint():
    final_story =   generate_final_story(stored_data["brainstroming_response"])
    stored_data['final_story']=final_story
    return {
        'response': final_story
    }

@app.post("/generate-image")  
def generate_image_endpoint():
    image = generate_image(str(stored_data['final_story']))
    stored_data['generated_image']=image
    return {
        'response':image
    }