import sys
from pathlib import Path

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


# ============================================================
# PROJECT PATH
# ============================================================

PROJECT_ROOT = Path(__file__).resolve().parent.parent
sys.path.append(str(PROJECT_ROOT))


# ============================================================
# RIGHTS NAVIGATOR
# ============================================================

from rights_navigator.rights_navigator import get_rights_response


# ============================================================
# FASTAPI
# ============================================================

app = FastAPI(
    title="CaseLoop Rights Navigator API"
)


# ============================================================
# CORS
# ============================================================

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


# ============================================================
# REQUEST MODEL
# ============================================================

class RightsRequest(BaseModel):
    grievance: str


# ============================================================
# HEALTH CHECK
# ============================================================

@app.get("/")
async def root():

    return {
        "status": "online",
        "service": "CaseLoop Rights Navigator",
        "endpoint": "/rights"
    }


# ============================================================
# RIGHTS NAVIGATOR
# ============================================================

@app.post("/rights")
@app.post("/api/rights")
async def rights_endpoint(request: RightsRequest):

    if not request.grievance.strip():

        raise HTTPException(
            status_code=400,
            detail="Grievance cannot be empty."
        )

    try:

        result = get_rights_response(
            request.grievance
        )

        return result

    except Exception as e:

        raise HTTPException(
            status_code=500,
            detail=str(e)
        )