import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.application import MIMEApplication
from pathlib import Path
from core.config.config_manager import ConfigManager
from core.utils.logger import Logger
from core.singleton import Singleton


class EmailNotifier(metaclass=Singleton):
    def __init__(self):
        self.config = ConfigManager()
        self.logger = Logger.get_logger()
        self.smtp_config = self.config.get('email', {})

    def send_email(self, recipients, subject, body, attachments=None):
        """发送邮件"""
        try:
            # 获取SMTP配置
            smtp_server = self.smtp_config.get('smtp_server')
            smtp_port = self.smtp_config.get('smtp_port', 587)
            username = self.smtp_config.get('username')
            password = self.smtp_config.get('password')

            if not all([smtp_server, username, password]):
                self.logger.warning("邮件配置不完整，无法发送邮件")
                return False

            # 创建邮件
            msg = MIMEMultipart()
            msg['From'] = username
            msg['To'] = ', '.join(recipients)
            msg['Subject'] = subject

            # 添加正文
            msg.attach(MIMEText(body, 'plain', 'utf-8'))

            # 添加附件
            if attachments:
                for attachment_path in attachments:
                    if isinstance(attachment_path, str):
                        attachment_path = Path(attachment_path)

                    if attachment_path.exists():
                        with open(attachment_path, 'rb') as f:
                            part = MIMEApplication(f.read(), Name=attachment_path.name)

                        part['Content-Disposition'] = f'attachment; filename="{attachment_path.name}"'
                        msg.attach(part)

            # 连接SMTP服务器并发送邮件
            with smtplib.SMTP(smtp_server, smtp_port) as server:
                server.starttls()
                server.login(username, password)
                server.sendmail(username, recipients, msg.as_string())

            self.logger.info(f"邮件已成功发送给: {', '.join(recipients)}")
            return True

        except Exception as e:
            self.logger.error(f"发送邮件失败: {str(e)}")
            return False

    def send_test_report(self, report_paths, test_results, execution_time):
        """发送测试报告邮件"""
        # 获取收件人列表
        recipients = self.smtp_config.get('recipients', [])
        if not recipients:
            self.logger.warning("未配置邮件收件人，跳过发送测试报告")
            return False

        # 准备邮件内容
        subject = self.smtp_config.get(
            'email_subject',
            '自动化测试报告 - {date}'
        ).format(date=datetime.now().strftime('%Y-%m-%d %H:%M'))

        # 统计测试结果
        total_tests = len(test_results)
        passed = sum(1 for r in test_results if r['status'] == 'PASS')
        failed = sum(1 for r in test_results if r['status'] == 'FAIL')
        error = sum(1 for r in test_results if r['status'] == 'ERROR')
        success_rate = (passed / total_tests) * 100 if total_tests > 0 else 0

        # 构建邮件正文
        body = f"""
自动化测试执行完成

执行时间: {execution_time:.2f} 秒
总测试数: {total_tests}
通过: {passed}
失败: {failed}
错误: {error}
通过率: {success_rate:.2f}%

测试环境: {self.config.get('environment', '未知环境')}

请查看附件中的详细测试报告。
"""

        # 发送邮件
        return self.send_email(recipients, subject, body, report_paths)