from account.decorators import login_required
from file.models import File

from folder.models import Folder
from .judgement_function import judge_filepath
from account.models import get_user
from utils.debug import debug_view
from utils.http import make_json_response
from utils.permission import can_delete
from utils.crypto import secure_transport
import base64

# Create your views here.


@secure_transport
# @debug_view(template_name='upload_file.html')
@login_required
def upload_file(request):
    data = request.POST
    user = get_user(request)
    key = data.get('key')
    file_b64 = data.get('file_b64')
    file_name = data.get('file_name')
    file_type = judge_filepath(file_name.split('.')[-1].lower()) if '.' in file_name else ''
    father_folder_id = data.get('father_folder_id')
    try:
        folder = Folder.objects.get(folder_id=father_folder_id)
    except:
        return make_json_response(code=402, error='文件夹不存在')
    if not folder.check_permission(user=user):
        return make_json_response(code=404, error='没有上传文件的权限')
    file = File.objects.create(file_name=file_name,
                               father_folder=folder,
                               file_type=file_type,
                               owner=user,
                               group=folder.group,
                               key=key)
    try:
        file_path = file.get_path()
        f = open(file_path, 'wb+')
        f.write(base64.b64decode(file_b64))
        f.close()
    except:
        file.delete()
        return make_json_response(code=500, error='文件保存失败')

    return make_json_response()


@secure_transport
# @debug_view('file_id')
@login_required
def download_file(request):
    user = get_user(request)
    file_id = request.POST.get('file_id')
    try:
        file = File.objects.get(file_id=file_id)
    except:
        return make_json_response(code=402, error='文件不存在')
    if not file.father_folder.check_permission(user=user):
        return make_json_response(code=404, error='没有下载文件的权限')
    try:
        file_path = file.get_path()
        f = open(file_path, 'rb')
        file_b64 = base64.b64encode(f.read())
        f.close()
    except:
        return make_json_response(code=500, error='文件读取失败')
    return make_json_response(file_b64=file_b64, **file.to_json())


@secure_transport
# @debug_view('file_id')
@login_required
def delete_file(request):
    data = request.POST
    user = get_user(request)
    file_id = data.get('file_id')
    try:
        file = File.objects.get(file_id=file_id)
    except:
        return make_json_response(code=402, error='文件不存在')
    if not can_delete(user=user, f=file):
        return make_json_response(code=404, error='没有删除文件的权限')
    file.delete()
    return make_json_response()