import asyncio import json import logging import time import uuid from threading import Thread from typing import Dict, Any from fastapi import FastAPI, HTTPException from fastapi.middleware.cors import CORSMiddleware from pydantic import BaseModel from sse_starlette.sse import EventSourceResponse from backend.agent import FixFlowAgent from backend.config import GLM_MODEL, GLM_BASE_URL, GLM_API_KEY, GITHUB_TOKEN from backend.github_client import GitHubClient from backend.llm_client import GLMClient logger = logging.getLogger(__name__) app = FastAPI(title="FixFlow API") app.add_middleware( CORSMiddleware, allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"], ) SESSION_CACHE: Dict[str, Any] = {} class AnalyzeRequest(BaseModel): issue_url: str repo_url: str run_confidence: bool = True @app.get("/api/analyze") async def analyze_endpoint(issue_url: str, repo_url: str, run_confidence: bool = True): if not GLM_API_KEY: raise HTTPException(status_code=400, detail="Missing GLM API key in backend config") session_id = str(uuid.uuid4()) queue = asyncio.Queue() def sync_runner(): llm = GLMClient( api_key=GLM_API_KEY, base_url=GLM_BASE_URL, model=GLM_MODEL, ) gh = GitHubClient(token=GITHUB_TOKEN) agent = FixFlowAgent(llm_client=llm, github_client=gh) def on_status(step: str, status: str, message: str): asyncio.run_coroutine_threadsafe( queue.put({"type": "status", "data": {"step": step, "status": status, "message": message}}), loop ) def on_stream(chunk: str): asyncio.run_coroutine_threadsafe( queue.put({"type": "stream", "data": {"chunk": chunk}}), loop ) try: result = agent.run( issue_url=issue_url, repo_url=repo_url, on_status=on_status, stream_callback=on_stream, run_confidence_eval=run_confidence, ) payload = { "bug_summary": result.bug_summary, "relevant_files_analysis": result.relevant_files_analysis, "suspect_file_paths": result.suspect_file_paths, "root_cause_analysis": result.root_cause_analysis, "diff_formatted": result.diff_formatted, "fix_explanation": result.fix_explanation, "diff_stats": result.diff_stats, "step_timings": result.step_timings, "fixed_files": result.fixed_files, "issue_title": result.issue_data.get("title", "Bug fix") } SESSION_CACHE[session_id] = result asyncio.run_coroutine_threadsafe( queue.put({"type": "done", "data": {"result": payload, "session_id": session_id}}), loop ) except Exception as e: logger.exception("Agent run failed") asyncio.run_coroutine_threadsafe( queue.put({"type": "error", "data": {"error": str(e)}}), loop ) finally: asyncio.run_coroutine_threadsafe( queue.put({"type": "eof"}), loop ) loop = asyncio.get_running_loop() thread = Thread(target=sync_runner) thread.start() async def event_generator(): while True: try: msg = await asyncio.wait_for(queue.get(), timeout=15.0) if msg["type"] == "eof": yield {"event": "eof", "data": json.dumps({"done": True})} break yield { "event": msg["type"], "data": json.dumps(msg["data"]) } except asyncio.TimeoutError: yield {"event": "heartbeat", "data": json.dumps({"alive": True})} return EventSourceResponse(event_generator()) class PRRequest(BaseModel): repo_url: str title: str body: str fixed_files: Dict[str, str] @app.post("/api/pr") def create_pr(req: PRRequest): if not GITHUB_TOKEN: raise HTTPException(status_code=400, detail="Missing GITHUB_TOKEN in backend config for PR creation") gh = GitHubClient(token=GITHUB_TOKEN) branch_name = f"fixflow-patch-{int(time.time())}" try: url = gh.create_pull_request( repo_url=req.repo_url, branch_name=branch_name, files_content=req.fixed_files, title=req.title, body=req.body ) return {"url": url} except Exception as e: logger.exception("PR creation failed") raise HTTPException(status_code=400, detail=str(e)) @app.get("/api/repo_info") def get_repo_info(repo_url: str): """ Fetch repository file tree and list open issues. """ try: gh = GitHubClient(token=GITHUB_TOKEN) # Fetch repo tree (flat list) tree = gh.fetch_repo_tree(repo_url) # Fetch top 10 open issues issues = gh.list_open_issues(repo_url, limit=10) return { "tree": tree, "issues": issues, "repo_url": repo_url } except Exception as e: logger.exception("Repo info fetch failed") raise HTTPException(status_code=400, detail=str(e)) raise HTTPException(status_code=400, detail=str(e)) @app.get("/api/file_content") def get_file_content(repo_url: str, file_path: str): """ Fetch the raw content of a specific file in the repository. """ try: gh = GitHubClient(token=GITHUB_TOKEN) content = gh.fetch_file_content(repo_url, file_path) return {"content": content, "path": file_path} except Exception as e: logger.exception("File content fetch failed") raise HTTPException(status_code=400, detail=str(e)) @app.get("/api/refine") async def refine_endpoint(session_id: str, feedback: str): if not GLM_API_KEY: raise HTTPException(status_code=400, detail="Missing GLM API key in backend config") if session_id not in SESSION_CACHE: raise HTTPException(status_code=404, detail="Session not found or expired") queue = asyncio.Queue() def sync_runner(): llm = GLMClient( api_key=GLM_API_KEY, base_url=GLM_BASE_URL, model=GLM_MODEL, ) gh = GitHubClient(token=GITHUB_TOKEN) agent = FixFlowAgent(llm_client=llm, github_client=gh) previous_result = SESSION_CACHE[session_id] def on_status(step: str, status: str, message: str): asyncio.run_coroutine_threadsafe( queue.put({"type": "status", "data": {"step": step, "status": status, "message": message}}), loop ) def on_stream(chunk: str): asyncio.run_coroutine_threadsafe( queue.put({"type": "stream", "data": {"chunk": chunk}}), loop ) try: result = agent.refine_fix( feedback=feedback, result=previous_result, on_status=on_status, stream_callback=on_stream, ) payload = { "bug_summary": result.bug_summary, "relevant_files_analysis": result.relevant_files_analysis, "suspect_file_paths": result.suspect_file_paths, "root_cause_analysis": result.root_cause_analysis, "diff_formatted": result.diff_formatted, "fix_explanation": result.fix_explanation, "diff_stats": result.diff_stats, "step_timings": result.step_timings, "fixed_files": result.fixed_files, "issue_title": result.issue_data.get("title", "Bug fix") } SESSION_CACHE[session_id] = result asyncio.run_coroutine_threadsafe( queue.put({"type": "done", "data": {"result": payload, "session_id": session_id}}), loop ) except Exception as e: logger.exception("Agent run failed") asyncio.run_coroutine_threadsafe( queue.put({"type": "error", "data": {"error": str(e)}}), loop ) finally: asyncio.run_coroutine_threadsafe( queue.put({"type": "eof"}), loop ) loop = asyncio.get_running_loop() thread = Thread(target=sync_runner) thread.start() async def event_generator(): while True: try: msg = await asyncio.wait_for(queue.get(), timeout=15.0) if msg["type"] == "eof": yield {"event": "eof", "data": json.dumps({"done": True})} break yield { "event": msg["type"], "data": json.dumps(msg["data"]) } except asyncio.TimeoutError: yield {"event": "heartbeat", "data": json.dumps({"alive": True})} return EventSourceResponse(event_generator())