from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select

from app.core.database import get_db
from app.core.deps import get_admin_user
from app.models.user import User, UserRole
from app.schemas.user import UserOut, AdminUserUpdate

router = APIRouter()


@router.get("/queue", response_model=list[UserOut])
async def get_queue(
    db: AsyncSession = Depends(get_db),
    _: User = Depends(get_admin_user),
):
    result = await db.execute(select(User).where(User.role == UserRole.pending))
    return result.scalars().all()


@router.get("/users", response_model=list[UserOut])
async def list_users(
    role: str | None = None,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(get_admin_user),
):
    query = select(User)
    if role:
        query = query.where(User.role == role)
    result = await db.execute(query)
    return result.scalars().all()


@router.post("/users/{user_id}/approve", response_model=UserOut)
async def approve_user(
    user_id: int,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(get_admin_user),
):
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    user.role = UserRole.approved
    await db.commit()
    await db.refresh(user)
    return user


@router.post("/users/{user_id}/deny", response_model=UserOut)
async def deny_user(
    user_id: int,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(get_admin_user),
):
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    user.is_active = False
    await db.commit()
    await db.refresh(user)
    return user


@router.patch("/users/{user_id}", response_model=UserOut)
async def update_user(
    user_id: int,
    data: AdminUserUpdate,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(get_admin_user),
):
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    if data.role is not None:
        user.role = data.role
    if data.is_active is not None:
        user.is_active = data.is_active
    await db.commit()
    await db.refresh(user)
    return user


@router.delete("/users/{user_id}", status_code=204)
async def delete_user(
    user_id: int,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(get_admin_user),
):
    result = await db.execute(select(User).where(User.id == user_id))
    user = result.scalar_one_or_none()
    if not user:
        raise HTTPException(status_code=404, detail="User not found")
    await db.delete(user)
    await db.commit()