from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware

from pydantic import BaseModel
from main import orchestrate, create_vector_store, load_and_chunk_file
from codeExecution import UserEnvironment
import conversation_store
import re

from config import Config
from codeExecution import UserEnvironment, orchestrate_code
from queries import (
    perform_web_search,
    rag_query,
   	classify_task,
    MODEL_NAMES
)

import debug as debugMod
from langchain.text_splitter import RecursiveCharacterTextSplitter
from langchain_community.vectorstores import Chroma
from langchain_community.embeddings import HuggingFaceEmbeddings
import conversation_store
conversation_store.initialize_db()

app = FastAPI()


class UserRequest(BaseModel):
    query: str
    user_id: str
    file_content: str = None


class CodeExecutionResponse(BaseModel):
    result: str
    error: str = None
    links: list[str] = []


# Maintain user environments and vector stores
user_environments = {}
user_vector_stores = {}


@app.post("/process-query")
async def process_query(request: UserRequest):
    try:
        # Initialize or retrieve user environment
        if request.user_id not in user_environments:
            user_environments[request.user_id] = UserEnvironment(
                request.user_id)
            user_vector_stores[request.user_id] = None

        # Handle file upload/content
        chunks = []
        if request.file_content:
            chunks = load_and_chunk_from_content(request.file_content)
            user_vector_stores[request.user_id] = create_vector_store(chunks)

        # Process query
        vector_store = user_vector_stores[request.user_id]
        response, links = orchestrate(
            request.query,
            vector_store=vector_store,
            comm_outp=lambda x: None,  # Disable direct printing
            comm_inp=lambda x: None    # Disable direct input
        )

        # Handle code execution
        code_blocks = re.findall(
            Config.code_block_regex(), response, re.DOTALL)
        execution_results = []
        if code_blocks:
            execution_results = execute_code_blocks(
                request.user_id,
                code_blocks,
                request.query,
                response,
                links,
                chunks
            )

        return {
            "response": response,
            "links": links,
            "execution_results": execution_results
        }
    except Exception as e:
        debugMod.log(f"API error: {str(e)}")
        raise HTTPException(status_code=500, detail=str(e))


def execute_code_blocks(user_id, code_blocks, query, response, links, chunks):
    results = []
    user_env = user_environments[user_id]
    vector_store = user_vector_stores[user_id]

    for code in code_blocks:
        result = orchestrate_code(
            orchestrate,
            vector_store,
            chunks,
            user_env,
            [code],
            query,
            response,
            links
        )
        results.append(result)
    return results


def load_and_chunk_from_content(content: str):
    splitter = RecursiveCharacterTextSplitter(
        chunk_size=Config.CHUNK_SIZE,
        chunk_overlap=Config.CHUNK_OVERLAP
    )
    return splitter.split_text(content)


app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)