from fastapi import APIRouter, Depends, HTTPException, Request
from sqlalchemy.orm import Session

from app.database import get_db
from app.models.user_settings import UserSettings
from app.schemas.auth import LoginRequest, TokenResponse, ChangePasswordRequest
from app.utils.auth import (
    hash_password, verify_password, create_access_token,
    get_current_user, set_default_password
)

router = APIRouter(prefix="/api/auth", tags=["认证"])


@router.post("/login", response_model=TokenResponse)
def login(data: LoginRequest, db: Session = Depends(get_db)):
    settings = db.query(UserSettings).filter(UserSettings.id == 1).first()
    if not settings:
        settings = UserSettings(id=1)
        db.add(settings)
        db.commit()
        db.refresh(settings)

    set_default_password(db, settings)

    if not verify_password(data.password, settings.password_hash):
        raise HTTPException(status_code=401, detail="密码错误")

    token = create_access_token({"sub": str(settings.id)})
    return TokenResponse(access_token=token)


@router.post("/change-password")
def change_password(
    data: ChangePasswordRequest,
    request: Request,
    db: Session = Depends(get_db)
):
    get_current_user(request)

    settings = db.query(UserSettings).filter(UserSettings.id == 1).first()
    if not settings:
        raise HTTPException(status_code=500, detail="用户设置不存在")

    if not verify_password(data.old_password, settings.password_hash):
        raise HTTPException(status_code=400, detail="原密码错误")

    settings.password_hash = hash_password(data.new_password)
    db.commit()

    return {"message": "密码修改成功"}