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from fastapi import APIRouter, status, Depends, BackgroundTasks, HTTPException
from fastapi.responses import JSONResponse
from src.utils.logger import logger
from pydantic import BaseModel, Field
from typing import List, Dict, Any, Optional
from src.agents.lesson_practice.flow import lesson_practice_agent
import json
import os
import uuid
from datetime import datetime

router = APIRouter(prefix="/lesson", tags=["AI"])


class LessonPracticeRequest(BaseModel):
    unit: str = Field(..., description="Unit of the lesson")
    vocabulary: list = Field(..., description="Vocabulary for the lesson")
    key_structures: list = Field(..., description="Key structures for the lesson")
    practice_questions: list = Field(
        ..., description="Practice questions for the lesson"
    )
    student_level: str = Field("beginner", description="Student's level of English")
    query: str = Field(..., description="User query for the lesson")
    session_id: str = Field(..., description="Session ID for the lesson")


@router.post("/chat")
async def chat(request: LessonPracticeRequest):
    response = await lesson_practice_agent().ainvoke(
        {
            "unit": request.unit,
            "vocabulary": request.vocabulary,
            "key_structures": request.key_structures,
            "practice_questions": request.practice_questions,
            "student_level": request.student_level,
            "messages": [request.query],
        },
        {"configurable": {"thread_id": request.session_id}},
    )
    return JSONResponse(
        content=response["messages"][-1].content, status_code=status.HTTP_200_OK
    )