import smtplib
from email.mime.text import MIMEText
from email.header import Header
import datetime
import re
import psycopg2
from psycopg2 import Error
from concurrent.futures import ThreadPoolExecutor, as_completed


class FreshRSSDatabase:
    def __init__(self):
        self.hostname = 'erhe.top'
        self.port = 20788
        self.database = 'freshrss'
        self.user = 'freshrss'
        self.password = 'freshrss'
        self.conn = None
        self.keys = [
            {'web3新闻': 'web3|区块链|NFT|DeFi|NFT'},
            {'购物类新闻': '大疆|无人机|硬盘|鼠标|纸巾|穿越机|礼物'},
            {'coin新闻': 'btc|eth|sui|degen'}
        ]
        self.ellipsis = 300
        self.days = 3

    def connect(self):
        """连接到 PostgreSQL 数据库"""
        try:
            self.conn = psycopg2.connect(
                dbname=self.database,
                user=self.user,
                password=self.password,
                host=self.hostname,
                port=self.port
            )
        except Error as e:
            print(f"Error connecting to the database: {e}")
            raise  # 重新抛出异常

    def execute_query(self, keywords):
        """执行 SQL 查询并返回结果"""
        if self.conn is None:
            self.connect()
        if self.conn is None:
            print("Database connection failed")
            return None
        try:
            cur = self.conn.cursor()
            conditions = [f"title ILIKE '%{keyword}%' AND content ILIKE '%{keyword}%'" for keyword in
                          keywords.split('|')]
            sql = f"""
            SELECT *
            FROM freshrss_toor_entry
            WHERE {" OR ".join(conditions)}
            AND date > EXTRACT(EPOCH FROM NOW() - INTERVAL '1 day')
            ORDER BY date DESC;
            """

            cur.execute(sql)
            records = cur.fetchall()
            cur.close()
            return records
        except Error as e:
            print(f"An error occurred: {e}")
            return None

    def close(self):
        """关闭数据库连接"""
        if self.conn:
            self.conn.close()

    def remove_all_html_tags(self, text):
        """
        移除字符串中的所有 HTML 标签。

        参数:
        text (str): 包含 HTML 标签的原始文本。

        返回:
        str: 移除所有 HTML 标签后的文本。
        """
        clean_text = re.sub(r'<[^>]+>', '', text)
        clean_text = clean_text.replace(' ', '')
        clean_text = clean_text.replace('\n', '')
        if len(clean_text) > self.ellipsis:
            clean_text = clean_text[:self.ellipsis] + '...'
        return clean_text

    def send_email(self, subject='', title='', text=''):
        mail_host = "smtp.163.com"
        mail_user = "pushmessagebot@163.com"
        mail_pass = "WSMSRKBKXIHIQWTU"

        sender = "pushmessagebot@163.com"
        receivers = ["pushmessagebot@163.com"]

        message = MIMEText(text, 'plain', 'utf-8')
        message['From'] = Header(title, 'utf-8')
        message['To'] = Header("RSS data", 'utf-8')
        message['Subject'] = Header(subject, 'utf-8')

        try:
            smtpObj = smtplib.SMTP_SSL(mail_host)
            smtpObj.login(mail_user, mail_pass)
            smtpObj.sendmail(sender, receivers, message.as_string())
            print(f"{title} 邮件发送成功")
        except smtplib.SMTPException as e:
            print("Error: 无法发送邮件", e)

    def query_and_process_key(self, key_name, keywords):
        records = self.execute_query(keywords)
        if records:
            unique_records = {}
            for record in records:
                title = self.remove_all_html_tags(record[2])  # 获取标题
                if title not in unique_records:
                    unique_records[title] = {
                        "title": title,
                        "content": self.remove_all_html_tags(record[4]),
                        "link": record[5],
                        "postdate": (datetime.datetime.utcfromtimestamp(record[7])
                                     .strftime('%Y-%m-%d %H:%M:%S')) if record[7] else '',
                        "posttimestamp": record[7] or 0
                    }
            return list(unique_records.values())
        return None

    def prepare_to_send(self, data):
        source_key = data.get('source_key')
        keys = data.get('keys')
        data_list = data.get('data')

        filter_data = []

        # 计算过去一天的时间戳
        one_day_ago = datetime.datetime.now() - datetime.timedelta(days=self.days)
        # 将 datetime 对象转换为时间戳
        one_day_ago_timestamp = one_day_ago.timestamp()

        for value in data_list:
            if value['posttimestamp'] >= one_day_ago_timestamp:
                filter_data.append(value)

        sorted_list = sorted(filter_data, key=lambda x: x['posttimestamp'], reverse=True)

        subject = 'RSS' + data.get('source_key')
        title = source_key

        key_data_total = len(data.get('data'))
        text = '关键词:\n' + data.get('keys').replace('|', '\n') + '\n\n'
        text += '一共搜索到: ' + str(key_data_total) + ' 条数据\n\n'
        text += '*' * 80 + '\n'
        for d in sorted_list:
            text += '标题: ' + d.get('title') + '\n'
            text += '内容: ' + d.get('content') + '\n'
            text += '链接: ' + d.get('link') + '\n'
            text += '发布日期: ' + d.get('postdate') + '\n'
            text += '时间戳: ' + str(d.get('posttimestamp')) + '\n\n'
            text += '*' * 80
            text += '\n\n'

        self.send_email(subject=subject, title=title, text=text)

    def main(self):
        # 执行查询
        loaded_data = {}
        with ThreadPoolExecutor(max_workers=len(self.keys)) as executor:
            future_to_key = {executor.submit(self.query_and_process_key, k, v): (k, v) for sublist in self.keys for k, v
                             in sublist.items()}
            for future in as_completed(future_to_key):
                key_name, keywords = future_to_key[future]
                try:
                    data = future.result()
                    if data:
                        loaded_data[key_name] = {
                            'source_key': key_name,
                            'keys': keywords,
                            'data': data
                        }
                    else:
                        print(f'key: {key_name} 数据为空')
                except Exception as exc:
                    print(f'{key_name} generated an exception: {exc}')

        # 关闭数据库连接
        self.close()

        for source_key, data in loaded_data.items():
            self.prepare_to_send(data)

        print('done!')


if __name__ == "__main__":
    f = FreshRSSDatabase()
    f.main()