"""
FastAPI server exposing the OpenEnv-compatible HTTP API.
Port: 7860 (Hugging Face Spaces default)
"""

from fastapi import FastAPI, HTTPException
from fastapi.responses import JSONResponse

from ..models import (
    DebugState,
    ResetRequest,
    ResetResponse,
    StepRequest,
    StepResponse,
)
from .environment import CodeDebugEnvironment

app = FastAPI(
    title="Code Debug OpenEnv",
    description="An OpenEnv environment where an AI agent debugs broken Python code.",
    version="1.0.0",
)

env = CodeDebugEnvironment()


# ------------------------------------------------------------------
# Health & metadata
# ------------------------------------------------------------------

@app.get("/health")
async def health():
    return {"status": "healthy", "tasks_loaded": len(env.tasks)}


@app.get("/tasks")
async def list_tasks():
    return env.list_tasks()


# ------------------------------------------------------------------
# OpenEnv core endpoints
# ------------------------------------------------------------------

@app.post("/reset", response_model=ResetResponse)
async def reset(req: ResetRequest = None):
    if req is None:
        req = ResetRequest()
    try:
        result = env.reset(task_id=req.task_id, seed=req.seed)
        return result
    except KeyError as e:
        raise HTTPException(status_code=404, detail=str(e))


@app.post("/step/{episode_id}", response_model=StepResponse)
async def step(episode_id: str, req: StepRequest):
    try:
        result = env.step(episode_id, req.action.model_dump())
        return result
    except KeyError as e:
        raise HTTPException(status_code=404, detail=str(e))
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@app.get("/state/{episode_id}", response_model=DebugState)
async def state(episode_id: str):
    try:
        return env.state(episode_id)
    except KeyError as e:
        raise HTTPException(status_code=404, detail=str(e))


# ------------------------------------------------------------------
# Entry point for local dev
# ------------------------------------------------------------------

if __name__ == "__main__":
    import uvicorn
    uvicorn.run("code_debug_env.server.app:app", host="0.0.0.0", port=7860, reload=True)