import os
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.application import MIMEApplication


def sendmail(smtp_server, port, username, password, from_addr, to_addr, subject, content, content_type='plain', cc_addr=None, bcc_addr=None, attachment=None):
	"""
	smtp_sever: 填SMTP服务器地址，string
	port: 填服务器端口，int
	username: 邮箱登录名，string
	password: 邮箱登录密码，string
	from_addr：发件人地址，只能填一个地址，string
	to_addr: 收件人地址，可多个，string、list、tuple均可
	subject: 邮件主题，string
	content: 邮件正文，string
	content_type: 邮件正文类型，只有两个选择：plain（默认）或html。string
	cc_addr: 抄送人地址，可多个，string、list、tuple均可，默认为None
	bcc_addr: 密送人地址，可多个，string、list、tuple均可，默认为None
	attachment: 邮件附件路径，可多个，string、list、tuple均可，默认为None
	"""

	msg = MIMEMultipart()

	# 处理发件人
	from_show_addr = from_addr
	from_addr = str(from_addr)
	msg['From'] = from_show_addr

	# 处理收件人
	if isinstance(to_addr, list):
		to_show_addr = ','.join(to_addr)
		to_addr = to_addr
	elif isinstance(to_addr, tuple):
		to_show_addr = ','.join(to_addr)
		to_addr = list(to_addr)
	elif isinstance(to_addr, str):
		if ',' in to_addr:
			to_addr.replace(' ', '')
			to_show_addr = to_addr
			to_addr = to_addr.split(',')
		else:
			to_show_addr = to_addr
			to_addr = [to_addr]
	msg['To'] = to_show_addr

	# 处理标题
	subject = str(subject)
	msg['Subject'] = subject

	# 处理抄送人
	if cc_addr is not None:
		if isinstance(cc_addr, list):
			cc_show_addr = ','.join(cc_addr)
			to_addr = to_addr + cc_addr
		elif isinstance(cc_addr, tuple):
			cc_show_addr = ','.join(cc_addr)
			to_addr = to_addr + list(cc_addr)
		elif isinstance(cc_addr, str):
			if ',' in cc_addr:
				cc_addr.replace(' ', '')
				cc_show_addr = cc_addr
				cc_addr = cc_addr.split(',')
				to_addr = to_addr + cc_addr
			else:
				cc_show_addr = cc_addr
				to_addr.append(cc_addr)
		msg['Cc'] = cc_show_addr

	# 处理密送人
	if bcc_addr is not None:
		if isinstance(bcc_addr, list):
			to_addr = to_addr + bcc_addr
		elif isinstance(bcc_addr, tuple):
			to_addr = to_addr + list(bcc_addr)
		elif isinstance(bcc_addr, str):
			if ',' in bcc_addr:
				bcc_addr.replace(' ', '')
				bcc_addr = bcc_addr.split(',')
				to_addr = to_addr + bcc_addr
			else:
				to_addr.append(bcc_addr)

	# 处理正文
	if content_type.lower() == 'plain':
		msg.attach(MIMEText(content, 'plain', 'UTF-8'))
	elif content_type.lower() == 'html':
		msg.attach(MIMEText(content, 'html', 'UTF-8'))

	# 处理附件
	if attachment is not None:
		if isinstance(attachment, list) or isinstance(attachment, tuple):
			for each_file in attachment:
				if os.path.isfile(each_file):
					with open(each_file, 'rb') as f:
						part = MIMEApplication(f.read(), Name=os.path.basename(each_file))
					part['Content-Disposition'] = 'attachment; filename="%s"' % os.path.basename(each_file)
					msg.attach(part)
		elif isinstance(attachment, str):
			if os.path.isfile(attachment):
				with open(attachment, 'rb') as f:
					part = MIMEApplication(f.read(), Name=os.path.basename(attachment))
				part['Content-Disposition'] = 'attachment; filename="%s"' % os.path.basename(attachment)
				msg.attach(part)

	server = smtplib.SMTP(smtp_server, int(port))
	server.starttls()
	server.login(username, password)
	server.sendmail(from_addr, to_addr, msg.as_string())
	print('Sent E-mail successfully!')
	server.quit()