import os

from django.contrib import messages
from django.conf import settings
from django.views.generic.base import TemplateView
from django.http import FileResponse , HttpResponsePermanentRedirect
from django.urls import reverse
import os.path as ospath

from os import makedirs
from tempfile import gettempdir
from .formats import *
from .convert import reindex_data

# Get temporary file storage
UPLOAD_PATH = gettempdir()
DATA_PATH = ospath.join(ospath.dirname(__file__), '..')
if not ospath.exists(DATA_PATH):
    makedirs(DATA_PATH)


def get_datafile(fmt):
    return ospath.join(
        DATA_PATH,
        fmt['folder'],
        fmt['filename'] + '.' + fmt['extension']
    )


# Data update tracking
c_progress = 0
c_filename = ""


class HomePageView(TemplateView):
    template_name = "app/index.html"

    def get_context_data(self, **kwargs):
        fmts = DATAFORMATS
        for f in fmts:
            f['ready'] = ospath.isfile(get_datafile(f))
        context = super().get_context_data(**kwargs)
        return context


class OfflinePageView(TemplateView):
    template_name = "app/offline.html"

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        return context


class DemoPageView(TemplateView):
    template_name = "app/demo.html"

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        return context


class ReindexPageView(TemplateView):
    template_name = "app/demo.html"

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        return context

    def post(self, request, **kwargs):
        global c_progress
        c_progress = 0
        global c_filename
        c_filename = ""
        reindex_data()
        messages.add_message(request, messages.INFO, 'Search engine refresh complete')
        print("Search engine reindexed")
        return HttpResponsePermanentRedirect(reverse('admin:index'))


def send_from_file(request, filename):
    request_for = ''
    if request.path.startswith('/geodata'):
        request_for = 'geodata'
    elif request.path.startswith('/data'):
        request_for = 'data'
    file_path = ospath.join(DATA_PATH, request_for, filename)
    file_to_send = open(file_path, 'rb')
    response = FileResponse(file_to_send)
    return response