# api_server.py

from fastapi import FastAPI, HTTPException, Depends
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from backend.skill_loader import scan_all_skills
from backend.agent import set_trigger_map, run_agent
from typing import List, Dict, Any


app = FastAPI(title="Nursing Copilot API")

origins = [
    "https://marcoleung052.github.io",
    "https://marcoleung052.github.io/NursingRecordCompletion_test",
    "*"
]

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

# -----------------------------
# Request / Response Models
# -----------------------------
class PredictionRequest(BaseModel):
    prompt: str
    patient_id: str | None = None
    model: str | None = "gpt2-nursing"

class PredictionResponse(BaseModel):
    completions: List[Dict[str, Any]]

# -----------------------------
# API Endpoint
# -----------------------------
@app.on_event("startup")
def startup_event():
    trigger_map = scan_all_skills()   # ⭐ 自動掃描 + 生成 TRIGGER_MAP.json
    set_trigger_map(trigger_map)      # ⭐ 注入到 agent.py


from backend.ai_output import run_ai_output

# -----------------------------
# Run server
# -----------------------------
if __name__ == "__main__":
    import uvicorn
    uvicorn.run("api_server:app", host="0.0.0.0", port=8000, reload=True)


# =================================================================
# 4. 資料庫設定（SQLite + SQLAlchemy）
# =================================================================
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, Session
import sys
import os
sys.path.append(os.path.dirname(__file__))

from models import Base, Patient, Nurse, Record

DATABASE_URL = "sqlite:///./nursing.db"

engine = create_engine(
    DATABASE_URL, connect_args={"check_same_thread": False}
)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# 建立資料表
Base.metadata.create_all(bind=engine)

# 🔥 正確的 get_db（一定要放在 endpoints 之前）
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()
        
# =================================================================
# 5. Schemas
# =================================================================
from pydantic import BaseModel

# 管理員
class LoginRequest(BaseModel):
    username: str
    password: str
    
# 病患
class PatientCreate(BaseModel):
    name: str
    mrn: str | None = None
    birth: str | None = None
    gender: str | None = None
    phone: str | None = None
    email: str | None = None

    emg_name: str | None = None
    emg_phone: str | None = None
    emg_relation: str | None = None

    room: str
    department: str
    doctor: str | None = None
    diagnosis: str
    risk: str
    admit_date: str


# 護士
class NurseCreate(BaseModel):
    name: str
    staff_id: str
    department: str | None = None
    position: str | None = None
    phone: str | None = None
    email: str | None = None
    password: str | None = None


# 護理紀錄
class RecordCreate(BaseModel):
    patient_id: int
    nurse_id: int
    content: str
    created_at: str

# =================================================================
# 6. 病患 API
# =================================================================
@app.post("/api/predict")
def predict_completion(request: PredictionRequest, db: Session = Depends(get_db)):

    print("收到的 request：", request.dict())

    if not request.prompt or request.prompt.strip() == "":
        raise HTTPException(status_code=400, detail="prompt 不可為空")

    if request.patient_id is None:
        raise HTTPException(status_code=400, detail="需要 patient_id")

    try:
        patient_id = int(request.patient_id)
    except:
        raise HTTPException(status_code=400, detail="patient_id 必須是整數")

    # ⭐ 只呼叫 agent，並把 db、patient_id 傳進去
    result = run_agent(
        user_input=request.prompt,
        patient_id=patient_id,
        db=db
    )

    return {"completions": [result]}

@app.post("/patients")
def create_patient(data: PatientCreate, db: Session = Depends(get_db)):
    patient = Patient(**data.dict())
    db.add(patient)
    db.commit()
    db.refresh(patient)
    return patient


@app.get("/patients")
def list_patients(db: Session = Depends(get_db)):
    return db.query(Patient).all()


@app.get("/patients/{patient_id}")
def get_patient(patient_id: int, db: Session = Depends(get_db)):
    patient = db.query(Patient).filter(Patient.id == patient_id).first()
    if not patient:
        raise HTTPException(status_code=404, detail="找不到病患")
    return patient
    
@app.put("/patients/{patient_id}")
def update_patient(patient_id: int, data: PatientCreate, db: Session = Depends(get_db)):
    patient = db.query(Patient).filter(Patient.id == patient_id).first()
    if not patient:
        raise HTTPException(status_code=404, detail="找不到病患")

    for key, value in data.dict().items():
        setattr(patient, key, value)

    db.commit()
    db.refresh(patient)
    return patient

@app.delete("/patients/{patient_id}")
def delete_patient(patient_id: int, db: Session = Depends(get_db)):
    patient = db.query(Patient).filter(Patient.id == patient_id).first()
    if not patient:
        raise HTTPException(status_code=404, detail="找不到病患")
    db.delete(patient)
    db.commit()
    return {"message": "病患已刪除"}
    
# =================================================================
# 7. 護士 API
# =================================================================
@app.post("/nurses")
def create_nurse(data: NurseCreate, db: Session = Depends(get_db)):
    nurse_data = data.dict()
    nurse_data["password"] = data.staff_id  # 預設密碼 = staff_id
    nurse = Nurse(**nurse_data)
    db.add(nurse)
    db.commit()
    db.refresh(nurse)
    return nurse

@app.delete("/nurses/{nurse_id}")
def delete_nurse(nurse_id: int, db: Session = Depends(get_db)):
    nurse = db.query(Nurse).filter(Nurse.id == nurse_id).first()
    if not nurse:
        raise HTTPException(status_code=404, detail="找不到護理師")

    db.delete(nurse)
    db.commit()
    return {"message": "護理師已刪除"}

@app.get("/nurses")
def list_nurses(db: Session = Depends(get_db)):
    return db.query(Nurse).all()

@app.get("/nurses/{nurse_id}")
def get_nurse(nurse_id: int, db: Session = Depends(get_db)):
    nurse = db.query(Nurse).filter(Nurse.id == nurse_id).first()
    if not nurse:
        raise HTTPException(status_code=404, detail="找不到護理師")
    return nurse
    
@app.delete("/nurses/{nurse_id}")
def delete_nurse(nurse_id: int, db: Session = Depends(get_db)):
    nurse = db.query(Nurse).filter(Nurse.id == nurse_id).first()
    if not nurse:
        raise HTTPException(status_code=404, detail="找不到護理師")

    db.delete(nurse)
    db.commit()
    return {"message": "護理師已刪除"}

@app.put("/nurses/{nurse_id}")
def update_nurse(nurse_id: int, data: NurseCreate, db: Session = Depends(get_db)):
    nurse = db.query(Nurse).filter(Nurse.id == nurse_id).first()
    if not nurse:
        raise HTTPException(status_code=404, detail="找不到護理師")

    for key, value in data.dict().items():
        setattr(nurse, key, value)

    db.commit()
    db.refresh(nurse)
    return nurse
      
@app.put("/nurses/{nurse_id}/reset-password")
def reset_password(nurse_id: int, db: Session = Depends(get_db)):
    nurse = db.query(Nurse).filter(Nurse.id == nurse_id).first()
    if not nurse:
        raise HTTPException(status_code=404, detail="找不到護理師")

    nurse.password = nurse.staff_id  # 密碼 = staff_id
    db.commit()
    return {"message": "密碼已重設"}

# =================================================================
# 8. 護理紀錄 API
# =================================================================
@app.post("/records")
def create_record(data: RecordCreate, db: Session = Depends(get_db)):
    record = Record(**data.dict())
    db.add(record)
    db.commit()
    db.refresh(record)
    return record


@app.get("/records/{patient_id}")
def list_records(patient_id: int, db: Session = Depends(get_db)):
    return db.query(Record).filter(Record.patient_id == patient_id).all()

@app.get("/records/detail/{record_id}")
def get_record_detail(record_id: int, db: Session = Depends(get_db)):
    record = db.query(Record).filter(Record.id == record_id).first()
    if not record:
        raise HTTPException(status_code=404, detail="找不到紀錄")
    return record

@app.put("/records/{record_id}")
def update_record(record_id: int, data: RecordCreate, db: Session = Depends(get_db)):
    record = db.query(Record).filter(Record.id == record_id).first()
    if not record:
        raise HTTPException(status_code=404, detail="找不到紀錄")

    for key, value in data.dict().items():
        setattr(record, key, value)

    db.commit()
    db.refresh(record)
    return record
    
@app.delete("/records/{record_id}")
def delete_record(record_id: int, db: Session = Depends(get_db)):
    record = db.query(Record).filter(Record.id == record_id).first()
    if not record:
        raise HTTPException(status_code=404, detail="找不到紀錄")

    db.delete(record)
    db.commit()
    return {"message": "紀錄已刪除"}

@app.post("/login")
def login(data: LoginRequest, db: Session = Depends(get_db)):

    # 管理員登入
    if data.username == "admin" and data.password == "1234":
        return {"role": "admin", "name": "Admin", "id": 0}

    # 護理師登入
    nurse = db.query(Nurse).filter(Nurse.staff_id == data.username).first()

    if not nurse:
        raise HTTPException(status_code=401, detail="帳號不存在")

    if nurse.password != data.password:
        raise HTTPException(status_code=401, detail="密碼錯誤")

    return {
        "role": "nurse",
        "name": nurse.name,
        "id": nurse.id
    }

@app.get("/current-user")
def current_user(token: str | None = None, db: Session = Depends(get_db)):

    if token == "admin":
        return {"role": "admin", "name": "Admin", "id": 0}

    if token is None:
        raise HTTPException(status_code=401, detail="未登入")

    nurse = db.query(Nurse).filter(Nurse.id == int(token)).first()

    if not nurse:
        raise HTTPException(status_code=401, detail="登入者不存在")

    return {
        "role": "nurse",
        "name": nurse.name,
        "id": nurse.id
    }
    
from fastapi.responses import FileResponse
@app.get("/download-db")
def download_db():
    return FileResponse("nursing.db", filename="nursing.db")