import smtplib
from email.mime.text import MIMEText
from email.header import Header
import datetime
import re
import psycopg2
from psycopg2 import Error


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|btc|eth|区块链|NFT|数字币|数字资产|Dapp|DeFi|NFT|稳定币|元宇宙|GameFi|跨链|以太坊'},
            {'购物类新闻': '大疆|无人机|硬盘|鼠标|纸巾'}
        ]
        self.ellipsis = 300

    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}")

        if not self.conn:
            raise Exception("Database connection failed")

    def execute_query(self, key):
        sql = f"""
        SELECT *
        FROM freshrss_toor_entry
        WHERE title LIKE %s 
        OR content LIKE %s
        AND "date" > EXTRACT(EPOCH FROM NOW() - INTERVAL '1 day')
        ORDER BY "date" DESC
        LIMIT 100;
        """

        """执行 SQL 查询并返回结果"""
        if self.conn is None:
            self.connect()
        try:
            cur = self.conn.cursor()
            cur.execute(sql, ('%' + key + '%', '%' + key + '%'))
            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。
        """
        # 移除所有 HTML 标签
        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("邮件发送成功")
        except smtplib.SMTPException as e:
            print("Error: 无法发送邮件", e)

    def main(self):
        # 执行查询
        loaded_data = {}
        for key_items in self.keys:
            for k, v in key_items.items():
                print(f'正在搜索 key-name: {k} 数据')
                keys = v.split('|')
                for key in keys:
                    print(f'正在搜索 key: {key} 数据')
                    records = self.execute_query(key)
                    if records:
                        for record in records:
                            title = self.remove_all_html_tags(record[2])
                            text = 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
                            if k not in loaded_data:
                                loaded_data[k] = {
                                    'source_key': k,
                                    'keys': v,
                                    'data': [{
                                        "key": key,
                                        "title": title,
                                        "content": text,
                                        "link": link,
                                        "postdate": postdate
                                    }]
                                }
                            else:
                                loaded_data[k]['data'].append({
                                    "title": title,
                                    "content": text,
                                    "link": link,
                                    "postdate": postdate,
                                    "posttimestamp": posttimestamp
                                })
                    else:
                        print(f'key: {key} 数据为空')

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

        for source_key, data in loaded_data.items():
            subject = 'RSS' + data.get('source_key')
            title = 'message bot'

            key_data_total = len(data.get('data'))
            text = '关键词: ' + data.get('keys') + '\n'
            text += '一共搜索到: ' + str(key_data_total) + ' 条数据\n'
            text += '*' * 120 + '\n'
            for d in data.get('data'):
                text += '标题: ' + d.get('title') + '\n'
                text += '内容: ' + d.get('content') + '\n'
                if d.get('key'):
                    text += '关键词: ' + d.get('key') + '\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'
                text += '*' * 120
                text += '\n\n'

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


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