from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from typing import List
from datetime import datetime

from ..database import get_db
from ..models import Topic
from ..schemas import TopicResponse, PublishRequest

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

@router.get("", response_model=List[TopicResponse])
def list_topics(
    status: str = None,
    db: Session = Depends(get_db)
):
    query = db.query(Topic)
    if status:
        query = query.filter(Topic.status == status)
    topics = query.order_by(Topic.priority_score.desc(), Topic.created_at.desc()).all()
    return topics

@router.get("/{topic_id}", response_model=TopicResponse)
def get_topic(topic_id: str, db: Session = Depends(get_db)):
    topic = db.query(Topic).filter(Topic.id == topic_id).first()
    if not topic:
        raise HTTPException(status_code=404, detail="Topic not found")
    return topic

@router.post("/{topic_id}/publish")
def publish_topic(topic_id: str, req: PublishRequest, db: Session = Depends(get_db)):
    topic = db.query(Topic).filter(Topic.id == topic_id).first()
    if not topic:
        raise HTTPException(status_code=404, detail="Topic not found")
    if topic.status != "ready":
        raise HTTPException(status_code=400, detail="Topic not in ready status")
    
    topic.status = "published"
    topic.published_at = datetime.now().date()
    topic.platform_urls = req.platform_urls
    db.commit()
    
    return {"message": "Topic marked as published", "topic_id": topic_id}