import logging

from django.utils.translation import gettext_lazy as _

from djangoblog.utils import get_current_site
from djangoblog.utils import send_email

logger = logging.getLogger(__name__)


def send_comment_email(comment):
    """
    当用户发表评论后，给评论者发送邮件通知；
    如果该评论是回复别人的，则同时给被回复的用户发送提醒邮件。
    """
    # 获取当前站点域名
    site = get_current_site().domain

    # 邮件主题
    subject = _('Thanks for your comment')

    # 构造文章访问 URL（以便用户点进查看）
    article_url = f"https://{site}{comment.article.get_absolute_url()}"

    # 给评论者自己发送的邮件内容
    html_content = _("""<p>Thank you very much for your comments on this site</p>
                    You can visit <a href="%(article_url)s" rel="bookmark">%(article_title)s</a>
                    to review your comments,
                    Thank you again!
                    <br />
                    If the link above cannot be opened, please copy this link to your browser.
                    %(article_url)s""") % {
                        'article_url': article_url,
                        'article_title': comment.article.title
                    }

    # 收件人 = 评论的作者本人
    tomail = comment.author.email

    # 发送邮件
    send_email([tomail], subject, html_content)

    try:
        # 如果该评论存在父评论（说明是回复行为）
        if comment.parent_comment:
            # 给被回复的人发送通知邮件
            html_content = _("""Your comment on <a href="%(article_url)s" rel="bookmark">%(article_title)s</a><br/> has 
                   received a reply. <br/> %(comment_body)s
                    <br/>   
                    go check it out!
                     <br/>
                     If the link above cannot be opened, please copy this link to your browser.
                     %(article_url)s
                    """) % {
                        'article_url': article_url,
                        'article_title': comment.article.title,
                        'comment_body': comment.parent_comment.body
                    }
            # 父评论的作者邮箱
            tomail = comment.parent_comment.author.email

            # 向被回复者发送邮件
            send_email([tomail], subject, html_content)

    except Exception as e:
        # 出现错误则记录日志，但不影响评论正常流程
        logger.error(e)