from fastapi import APIRouter, Depends, HTTPException, BackgroundTasks
from typing import List, Optional
import os
import json

from app.models.pitch_input import PitchInput, InvestorType
from app.models.pitch_output import PitchOutput
from app.services.openai_agents import OpenAIAgentService
from app.core.config import settings

router = APIRouter()
agent_service = OpenAIAgentService()

@router.post("/generate-pitch", response_model=PitchOutput)
async def generate_pitch(pitch_input: PitchInput):
    """
    Generate pitch scripts based on user input.
    
    This endpoint:
    1. Accepts structured user input about their startup
    2. Processes it through a RAG pipeline (Perplexity → Gemini → OpenAI)
    3. Returns elevator and full pitch scripts with competitor analysis
    """
    try:
        if pitch_input.investor_type == InvestorType.ANGEL:
            return await agent_service.create_angel_investor_agent(pitch_input)
        else:
            return await agent_service.create_vc_investor_agent(pitch_input)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Error generating pitch: {str(e)}")

@router.get("/scripts/{script_id}", response_model=PitchOutput)
async def get_script(script_id: str):
    """
    Retrieve a previously generated script by ID.
    """
    # Search in both angel and vc directories
    for investor_type in ["angel", "vc"]:
        filename = f"{settings.SCRIPTS_STORAGE_PATH}/{investor_type}_{script_id}.json"
        if os.path.exists(filename):
            with open(filename, "r") as f:
                data = json.load(f)
                return data["output"]
    
    raise HTTPException(status_code=404, detail=f"Script with ID {script_id} not found")

@router.get("/scripts", response_model=List[dict])
async def list_scripts():
    """
    List all available scripts.
    """
    scripts = []
    
    # List all JSON files in the scripts directory
    for filename in os.listdir(settings.SCRIPTS_STORAGE_PATH):
        if filename.endswith(".json"):
            filepath = os.path.join(settings.SCRIPTS_STORAGE_PATH, filename)
            with open(filepath, "r") as f:
                data = json.load(f)
                
                # Add a summary to the list
                scripts.append({
                    "script_id": data["output"]["script_id"],
                    "startup_name": data["input"]["startup_name"],
                    "investor_type": data["input"]["investor_type"],
                    "created_at": os.path.getctime(filepath)
                })
    
    return sorted(scripts, key=lambda x: x["created_at"], reverse=True)