import asyncio, zipfile, os
from io import BytesIO
from os.path import exists, isfile
from pagermaid import bot, version
from pagermaid.listener import listener
from pagermaid.utils import alias_command


async def make_zip(source_dir, output_filename):
    zipf = zipfile.ZipFile(output_filename, "w")
    pre_len = len(os.path.dirname(source_dir))
    for parent, dirnames, filenames in os.walk(source_dir):
        for filename in filenames:
            pathfile = os.path.join(parent, filename)
            arcname = pathfile[pre_len:].strip(os.path.sep)
            zipf.write(pathfile, arcname)
    zipf.close()


async def del_msg(context, t_lim):
    await asyncio.sleep(t_lim)
    try:
        await context.delete()
    except:
        pass


@listener(is_plugin=True, outgoing=True, command=alias_command("transfer"),
          description="上传 / 下载文件",
          parameters="upload <filepath>` 或 `download <filepath>")
async def transfer(context):
    params = context.parameter
    if len(params) < 2:
        await context.edit("参数缺失")
        await del_msg(context, 3)
        return
    params[1] = " ".join(params[1:])
    file_list = params[1].split("\n")
    chat_id = context.chat_id
    if params[0] == "upload":
        index = 1
        for file_path in file_list:
            await context.edit(f"正在上传第 {index} 个文件")
            if exists(file_path):
                if isfile(file_path):
                    await bot.send_file(chat_id, file_path, force_document=True)
                else:
                    token = file_path.split("/")
                    token = token[len(token) - 1]
                    await make_zip(file_path, f"/tmp/{token}.zip")
                    await bot.send_file(chat_id, f"/tmp/{token}.zip", force_document=True)
                    os.remove(f"/tmp/{token}.zip")
            index += 1
        await context.edit("上传完毕")
        await del_msg(context, 3)
    elif params[0] == "download":
        message = await context.get_reply_message()
        if message and message.media:
            _file = BytesIO()
            try:
                await bot.download_file(message.media.document, _file)
            except AttributeError:
                await context.edit('无法下载此类型的文件。')
                return
            if not exists(file_list[0]):
                with open(file_list[0], "wb") as f:
                    f.write(_file.getvalue())
                await context.edit(f"保存成功, 保存路径 {file_list[0]}")
                await del_msg(context, 5)
            else:
                await context.edit("路径已存在文件")
                await del_msg(context, 3)
        else:
            await context.edit("未回复消息或回复消息中不包含文件")
            await del_msg(context, 3)
    else:
        await context.edit("未知命令")
        await del_msg(context, 3)