from typing import Optional

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

from app.auth import get_current_admin_user
from app.database import get_session
from app.models import HistoryEntry
from app.schemas import HistoryEntryCreate, HistoryEntryUpdate, HistoryEntryResponse
from app.user_models import User

router = APIRouter()


@router.get("", response_model=list[HistoryEntryResponse])
async def list_history_entries(
    active: Optional[bool] = Query(None, description="Filter by active status"),
    session: AsyncSession = Depends(get_session),
):
    query = select(HistoryEntry).order_by(HistoryEntry.display_order)
    if active is not None:
        query = query.where(HistoryEntry.active == active)
    result = await session.execute(query)
    return list(result.scalars().all())


@router.get("/{entry_id}", response_model=HistoryEntryResponse)
async def get_history_entry(entry_id: int, session: AsyncSession = Depends(get_session)):
    result = await session.execute(select(HistoryEntry).where(HistoryEntry.id == entry_id))
    entry = result.scalar_one_or_none()
    if not entry:
        return {"error": "History entry not found"}
    return entry


@router.post("", response_model=HistoryEntryResponse, status_code=201)
async def create_history_entry(
    payload: HistoryEntryCreate,
    session: AsyncSession = Depends(get_session),
    _: User = Depends(get_current_admin_user),
):
    entry = HistoryEntry(**payload.model_dump(), active=True)
    session.add(entry)
    await session.commit()
    await session.refresh(entry)
    return entry


@router.put("/{entry_id}", response_model=HistoryEntryResponse)
async def update_history_entry(
    entry_id: int,
    payload: HistoryEntryUpdate,
    session: AsyncSession = Depends(get_session),
    _: User = Depends(get_current_admin_user),
):
    result = await session.execute(select(HistoryEntry).where(HistoryEntry.id == entry_id))
    entry = result.scalar_one_or_none()
    if not entry:
        return {"error": "History entry not found"}
    for key, value in payload.model_dump(exclude_unset=True).items():
        setattr(entry, key, value)
    await session.commit()
    await session.refresh(entry)
    return entry


@router.delete("/{entry_id}", status_code=204)
async def delete_history_entry(
    entry_id: int,
    session: AsyncSession = Depends(get_session),
    _: User = Depends(get_current_admin_user),
):
    result = await session.execute(select(HistoryEntry).where(HistoryEntry.id == entry_id))
    entry = result.scalar_one_or_none()
    if not entry:
        return {"error": "History entry not found"}
    await session.delete(entry)
    await session.commit()