from fastapi import APIRouter, HTTPException, status

from app.schemas.analysis import (
    AnalysisSessionCreateRequest,
    AnalysisSessionListResponse,
    AnalysisSessionResponse,
    AnalysisSessionSnapshot,
)
from app.services.analysis_service import AnalysisService

router = APIRouter()
service = AnalysisService()


@router.post(
    "/sessions",
    response_model=AnalysisSessionResponse,
    status_code=status.HTTP_201_CREATED,
)
def create_analysis_session(
    payload: AnalysisSessionCreateRequest,
) -> AnalysisSessionResponse:
    return service.create_session(payload)


@router.get("/sessions", response_model=AnalysisSessionListResponse)
def list_analysis_sessions() -> AnalysisSessionListResponse:
    return service.list_sessions()


@router.get("/sessions/{session_id}", response_model=AnalysisSessionSnapshot)
def get_analysis_session(session_id: str) -> AnalysisSessionSnapshot:
    snapshot = service.get_session(session_id)
    if snapshot is None:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"Analysis session '{session_id}' was not found.",
        )
    return snapshot