from datetime import datetime

from sqlalchemy import func

from database.thottopic.model import THotTopic


def create_hot_topic(db, hot_topic: THotTopic):
    db.add(hot_topic)
    db.commit()
    db.refresh(hot_topic)
    return hot_topic


# 插入数据库之前判断数据库中是否已经存在，根据news.url 判断
def create_topic_if_url_not_exists(db, hot_topic: THotTopic):
    # 检查是否已经存在具有相同 URL 的记录
    existing_topic = db.query(THotTopic).filter(THotTopic.url == hot_topic.url).first()

    if existing_topic:
        # 如果记录已存在，直接返回已有的记录
        return existing_topic

    # 如果记录不存在，插入新的记录
    db.add(hot_topic)
    db.commit()
    db.refresh(hot_topic)
    return hot_topic


def create_topics_if_url_not_exists(db, topics: list[THotTopic]):
    inserted_topics = []  # 用于保存实际插入的新闻记录

    for topic in topics:
        # 检查是否已经存在具有相同 URL 的记录
        existing_topic = db.query(THotTopic).filter(THotTopic.url == topic.url).first()

        if not existing_topic:
            # 如果记录不存在，插入新的记录
            db.add(topic)
            inserted_topics.append(topic)

    # 批量提交所有插入的记录
    db.commit()

    # 刷新所有新插入的记录
    for topic in inserted_topics:
        db.refresh(topic)

    return inserted_topics


def get_hot_topic_by_id(db, hot_topic_id: int):
    return db.query(THotTopic).filter(THotTopic.id == hot_topic_id).first()


def get_hot_topics(db, skip: int = 0, limit: int = 100):
    return db.query(THotTopic).offset(skip).limit(limit).all()

# 根据THotTopic.update_time排序，获取最新的THotTopic
def get_latest_hot_topic(db):
    return db.query(THotTopic).order_by(THotTopic.update_time.desc()).first()

# 根据THotTopic.create_time获取今日的所有THotTopic
def get_today_hot_topic(db):
    today = datetime.now().date()
    return db.query(THotTopic).filter(func.date(THotTopic.create_time) == today).all()

def update_hot_topic(db, hot_topic: THotTopic):
    db.merge(hot_topic)
    db.commit()
    db.refresh(hot_topic)
    return hot_topic


# def update_hot_topic(db, hot_topic_id: int, updates: dict):
#     db.query(THotTopic).filter(THotTopic.id == hot_topic_id).update(updates)
#     db.commit()
#     return db.query(THotTopic).filter(THotTopic.id == hot_topic_id).first()


def delete_hot_topic(db, hot_topic_id: int):
    hot_topic = db.query(THotTopic).filter(THotTopic.id == hot_topic_id).first()
    if hot_topic:
        db.delete(hot_topic)
        db.commit()
    return hot_topic