"""Votes & engagement router."""

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

from app.database import get_db
from app.models import User, Shader, Vote, EngagementEvent
from app.schemas import VoteCreate
from app.middleware.auth import get_current_user, get_optional_user

router = APIRouter()


@router.post("/shaders/{shader_id}/vote", status_code=status.HTTP_200_OK)
async def vote_shader(
    shader_id: UUID,
    body: VoteCreate,
    db: AsyncSession = Depends(get_db),
    user: User = Depends(get_current_user),
):
    # Verify shader exists
    shader = (await db.execute(select(Shader).where(Shader.id == shader_id))).scalar_one_or_none()
    if not shader:
        raise HTTPException(status_code=404, detail="Shader not found")

    # Upsert vote
    existing = (await db.execute(
        select(Vote).where(Vote.user_id == user.id, Vote.shader_id == shader_id)
    )).scalar_one_or_none()

    if existing:
        existing.value = body.value
    else:
        db.add(Vote(user_id=user.id, shader_id=shader_id, value=body.value))

    # TODO: Recalculate hot score (Track F)
    return {"status": "ok", "value": body.value}


@router.delete("/shaders/{shader_id}/vote", status_code=status.HTTP_204_NO_CONTENT)
async def remove_vote(
    shader_id: UUID,
    db: AsyncSession = Depends(get_db),
    user: User = Depends(get_current_user),
):
    existing = (await db.execute(
        select(Vote).where(Vote.user_id == user.id, Vote.shader_id == shader_id)
    )).scalar_one_or_none()

    if existing:
        await db.delete(existing)
    # TODO: Recalculate hot score (Track F)


@router.post("/shaders/{shader_id}/replay", status_code=status.HTTP_204_NO_CONTENT)
async def report_replay(
    shader_id: UUID,
    db: AsyncSession = Depends(get_db),
    user: User | None = Depends(get_optional_user),
):
    event = EngagementEvent(
        user_id=user.id if user else None,
        shader_id=shader_id,
        event_type="replay",
    )
    db.add(event)