import os
import json
import sqlite3
from datetime import datetime, timedelta

def clear_table():
    conn = sqlite3.connect('./resources/db/sougou-wx.db')
    cursor = conn.cursor()
    cursor.execute('DELETE FROM articles')
    conn.commit()
    conn.close()

def create_database():
    conn = sqlite3.connect('./resources/db/sougou-wx.db')
    cursor = conn.cursor()
    cursor.execute('''CREATE TABLE IF NOT EXISTS articles (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        title TEXT,
        link TEXT,
        description TEXT,
        pubDate DATETIME,
        author TEXT,
        keyword TEXT,
        is_sended BOOLEAN
    )''')
    conn.commit()
    conn.close()

def insert_data(data):
    conn = sqlite3.connect('./resources/db/sougou-wx.db')
    cursor = conn.cursor()
    for entry in data:
        # 检查是否存在相同 title 和 author 的记录
        cursor.execute('''
            SELECT 1 FROM articles WHERE title = ? AND author = ?
        ''', (entry['title'], entry['author']))
        
        if cursor.fetchone() is None:
            # 如果没有找到相同记录，则插入新记录
            cursor.execute('''
                INSERT INTO articles (title, link, description, pubDate, author, keyword)
                VALUES (?, ?, ?, ?, ?, ?)
            ''', (entry['title'], entry['link'], entry['description'], entry['pubDate'], entry['author'], entry['keyword']))
    
    conn.commit()
    conn.close()

def get_json():
    # 检查文件是否存在
    if not os.path.exists('./resources/JSON/sougou-wx.json'):
        raise FileNotFoundError(f"sougou-wx.json文件不存在，请检查程序是否运行正常！")
    
    # 打开并读取JSON文件
    with open('./resources/JSON/sougou-wx.json', 'r', encoding='utf-8') as file:
        content = file.read()
        if not content:
            pass
        else:
            data = json.loads(content)
    
    # 假设data是一个包含多个关键词的字典
    total_data = []
    for keyword, keyword_data in data.items():
        # 检查关键词对应的数据是否为列表
        if not isinstance(keyword_data, list):
            raise ValueError(f"关键词 {keyword} 对应的数据格式错误，请检查爬取程序是否异常！")
        
        # 提取所需字段并编号
        for index, item in enumerate(keyword_data, start=1):
            entry = {
                "id": index,
                "title": item.get("title", ""),
                "link": item.get("link", ""),
                "description": item.get("description", ""),
                "pubDate": item.get("pubDate", ""),
                "author": item.get("author", ""),
                "keyword": keyword
            }
            total_data.append(entry)
    
    return total_data

def select_articles():
    conn = sqlite3.connect('./resources/db/sougou-wx.db')
    cursor = conn.cursor()
    
    # 获取当前日期和时间
    now = datetime.now()
    two_months_ago = now - timedelta(days=60)  # 假设两个月大约60天
    
    try:
        # 查询最近的3条未被标记为True的消息且发布时间不超过两个月
        cursor.execute('''
            SELECT * FROM articles
            WHERE is_sended IS NULL AND pubDate BETWEEN ? AND ?
            ORDER BY pubDate DESC
            LIMIT 3
        ''', (two_months_ago.strftime('%Y-%m-%d %H:%M:%S'), now.strftime('%Y-%m-%d %H:%M:%S')))
        
        results = cursor.fetchall()
        # print(results)

        if results:
            for row in results:
                article_id = row[0]
                cursor.execute('''
                    UPDATE articles
                    SET is_sended = True
                    WHERE id = ?
                ''', (article_id,))
            
            conn.commit()  # 提交事务

    except Exception as e:
        conn.rollback()  # 回滚事务
        print(f"Error: {e}")
    finally:
        cursor.close()
        conn.close()
    
    return results

def record(title, link, description, upload_time, author, keyword):
    db_path = './resources/db/web.db'
    conn = sqlite3.connect(db_path)
    cursor = conn.cursor()
    
    # 创建表（如果不存在）
    cursor.execute('''CREATE TABLE IF NOT EXISTS wx_news (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        article_title TEXT,
        link TEXT,
        description TEXT,
        upload_time DATETIME,
        author TEXT,
        keyword TEXT
    )''')
    
    # 插入数据
    cursor.execute('''
        INSERT INTO wx_news (article_title, link, description, upload_time, author, keyword)
        VALUES (?, ?, ?, ?, ?, ?)
    ''', (title, link, description, upload_time, author, keyword))
    
    conn.commit()
    conn.close()

def get_filtered_articles(entries):
    result_long = ""
    result_short = ""
    short_results = []

    for entry in entries:
        # 构建长文本结果
        result_long += f"文章：[{entry[1]}]({entry[2]})\n描述：{entry[3]}\n"
        result_long += f"上传时间：{entry[4]}\n"
        result_long += f"作者：{entry[5]}\n"
        result_long += f"关键词：{entry[6]}\n"
        result_long += "\n" + "-" * 40 + "\n"  # 添加分隔线以便区分不同文章

        # 构建短文本结果并进行分块处理
        current_entry = (
            f"文章：[{entry[1]}]({entry[2]})\n"
            f"关键词：{entry[6]}\n"
            f"上传时间：{entry[4]}\n"
            "\n" + "-" * 3 + "\n"  # 添加分隔线以便区分不同文章
        )
        temp_result = result_short + current_entry
        if len(temp_result.encode('utf-8')) > 4096:
            short_results.append(result_short)
            result_short = current_entry
        else:
            result_short = temp_result

        record(
            title=entry[1],
            link=entry[2],
            description=entry[3],
            upload_time=entry[4],
            author=entry[5],
            keyword=entry[6]
        )

    # 处理最后一个结果
    if result_short:
        short_results.append(result_short)

    return result_long, short_results

def Src_sougou_wx():
    if not os.path.exists('./resources/db/sougou-wx.db'):
        # 创建数据库和表
        create_database()

    # 清空表
    # clear_table()

    # 获取 JSON 数据
    sougou_wx_data = get_json()

    # 插入数据到数据库
    insert_data(sougou_wx_data)

    # 查询指定时间段内的数据
    filtered_articles = select_articles()
    # print(filtered_articles)

    if filtered_articles:
        result_long, short_results = get_filtered_articles(filtered_articles)
        return result_long, short_results
    else:
        return False
    
if __name__ == "__main__":
    results = Src_sougou_wx()
    if results != False:
        result_long, short_results = results
        
        # 写入长文本结果
        with open("./1.txt", "a", encoding="utf-8") as f:
            f.write(result_long)
            f.write("\n" + "-" * 40 + "\n")
        
        # 写入分块的短文本结果
        for short_result in short_results:
            with open("./2.txt", "a", encoding="utf-8") as f:
                f.write(short_result)
                f.write("\n" + "-" * 40 + "\n")
    else:
        # 如果为空，则跳过执行
        print("-" * 40)
        print("微信公众号数据为空，跳过执行。")