from sqlalchemy.orm import Session
from database.models import RSSEntry, InstagramPostRecord, SessionLocal
from typing import Optional, List
from datetime import datetime

def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()

def is_entry_processed(db: Session, entry_id: str) -> bool:
    """Check if RSS entry already processed"""
    return db.query(RSSEntry).filter(RSSEntry.entry_id == entry_id).first() is not None

def save_rss_entry(db: Session, entry_id: str, feed_url: str, title: str, 
                   link: str, published: datetime, content: str) -> RSSEntry:
    """Save new RSS entry"""
    entry = RSSEntry(
        entry_id=entry_id,
        feed_url=feed_url,
        title=title,
        link=link,
        published=published,
        content=content
    )
    db.add(entry)
    db.commit()
    db.refresh(entry)
    return entry

def save_instagram_post(db: Session, rss_entry_id: str, post_data: dict,
                        image_url: str = None, drive_url: str = None,
                        instagram_post_id: str = None, status: str = "pending",
                        error_message: str = None) -> InstagramPostRecord:
    """Save Instagram post record"""
    post = InstagramPostRecord(
        rss_entry_id=rss_entry_id,
        post_data=post_data,
        image_url=image_url,
        drive_url=drive_url,
        instagram_post_id=instagram_post_id,
        status=status,
        error_message=error_message
    )
    db.add(post)
    db.commit()
    db.refresh(post)
    return post

def update_post_status(db: Session, post_id: int, status: str, 
                       instagram_post_id: str = None, error_message: str = None):
    """Update post status"""
    post = db.query(InstagramPostRecord).filter(InstagramPostRecord.id == post_id).first()
    if post:
        post.status = status
        if instagram_post_id:
            post.instagram_post_id = instagram_post_id
            post.posted_at = datetime.utcnow()
        if error_message:
            post.error_message = error_message
        db.commit()

def get_pending_posts(db: Session, limit: int = 10) -> List[InstagramPostRecord]:
    """Get pending posts"""
    return db.query(InstagramPostRecord).filter(
        InstagramPostRecord.status == "pending"
    ).limit(limit).all()