from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from typing import List
from app.database import get_db
from app.models import Setting
from app.schemas import Setting as SettingSchema, SettingUpdate

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

@router.get("/", response_model=List[SettingSchema])
async def list_settings(db: AsyncSession = Depends(get_db)):
    result = await db.execute(select(Setting))
    settings = result.scalars().all()
    return settings

@router.get("/{key}", response_model=SettingSchema)
async def get_setting(key: str, db: AsyncSession = Depends(get_db)):
    result = await db.execute(select(Setting).where(Setting.key == key))
    setting = result.scalar_one_or_none()
    if not setting:
        raise HTTPException(status_code=404, detail="Setting not found")
    return setting

@router.put("/{key}", response_model=SettingSchema)
async def update_setting(
    key: str,
    setting_update: SettingUpdate,
    db: AsyncSession = Depends(get_db)
):
    result = await db.execute(select(Setting).where(Setting.key == key))
    setting = result.scalar_one_or_none()
    
    if not setting:
        # Create if not exists
        setting = Setting(key=key, value=setting_update.value)
        db.add(setting)
    else:
        setting.value = setting_update.value
    
    await db.commit()
    await db.refresh(setting)
    return setting