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    "## Deploy Earth Engine Apps using Voila and ngrok\n",
    "\n",
    "**Steps to deploy an Earth Engine App:**\n",
    "1. Install ngrok by following the [instruction](https://ngrok.com/download)\n",
    "2. Install voila by following the [instruction](https://voila.readthedocs.io/en/stable/install.html)\n",
    "3. Download the notebook [28_voila.ipynb](https://github.com/giswqs/geemap/blob/master/examples/notebooks/28_voila.ipynb) \n",
    "4. Run this from the command line: `voila --no-browser 28_voila.ipynb`\n",
    "5. Run this from the command line: `ngrok http 8866`\n",
    "6. Copy the link from the ngrok terminal window. The links looks like the following: https://randomstring.ngrok.io\n",
    "7. Share the link with anyone. \n",
    "\n",
    "**Optional steps:**\n",
    "* To show code cells from you app, run this from the command line: `voila --no-browser --strip_sources=False 28_voila.ipynb`\n",
    "* To protect your app with a password, run this: `ngrok http -auth=\"username:password\" 8866`\n",
    "* To run python simple http server in the directory, run this:`sudo python -m http.server 80` "
   ]
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   "source": [
    "import os\n",
    "import ee\n",
    "import geemap\n",
    "import ipywidgets as widgets"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
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    "Map = geemap.Map()\n",
    "Map.add_basemap('HYBRID')\n",
    "Map"
   ]
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    "style = {'description_width': 'initial'}\n",
    "title = widgets.Text(\n",
    "    description='Title:',\n",
    "    value='Landsat Timelapse',\n",
    "    width=200,\n",
    "    style=style\n",
    ")\n",
    "\n",
    "bands = widgets.Dropdown(\n",
    "    description='Select RGB Combo:',\n",
    "    options=['Red/Green/Blue', 'NIR/Red/Green',  'SWIR2/SWIR1/NIR', 'NIR/SWIR1/Red','SWIR2/NIR/Red', \n",
    "             'SWIR2/SWIR1/Red', 'SWIR1/NIR/Blue', 'NIR/SWIR1/Blue', 'SWIR2/NIR/Green', 'SWIR1/NIR/Red'],\n",
    "    value='NIR/Red/Green',\n",
    "    style=style\n",
    ")\n",
    "\n",
    "hbox1 = widgets.HBox([title, bands])\n",
    "hbox1"
   ]
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   "execution_count": null,
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    "speed = widgets.IntSlider(\n",
    "    description='  Frames per second:',\n",
    "    tooltip='Frames per second:',\n",
    "    value=10,\n",
    "    min=1, \n",
    "    max = 30,\n",
    "    style=style\n",
    ")\n",
    "\n",
    "cloud = widgets.Checkbox(\n",
    "    value=True,\n",
    "    description='Apply fmask (remove clouds, shadows, snow)',\n",
    "    style=style\n",
    ")\n",
    "\n",
    "hbox2 = widgets.HBox([speed, cloud])\n",
    "hbox2"
   ]
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    "start_year = widgets.IntSlider(description='Start Year:', value=1984, min=1984, max=2020, style=style)\n",
    "end_year = widgets.IntSlider(description='End Year:', value=2020, min=1984, max=2020, style=style)\n",
    "start_month = widgets.IntSlider(description='Start Month:', value=5, min=1, max=12, style=style)\n",
    "end_month = widgets.IntSlider(description='End Month:', value=10, min=1, max=12, style=style)\n",
    "hbox3 = widgets.HBox([start_year, end_year, start_month, end_month])\n",
    "hbox3"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
   "metadata": {
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   "outputs": [],
   "source": [
    "font_size = widgets.IntSlider(description='Font size:', value=30, min=10, max=50, style=style)\n",
    "\n",
    "font_color = widgets.ColorPicker(\n",
    "    concise=False,\n",
    "    description='Font color:',\n",
    "    value='white',\n",
    "    style=style\n",
    ")\n",
    "\n",
    "progress_bar_color = widgets.ColorPicker(\n",
    "    concise=False,\n",
    "    description='Progress bar color:',\n",
    "    value='blue',\n",
    "    style=style\n",
    ")\n",
    "\n",
    "hbox4 = widgets.HBox([font_size, font_color, progress_bar_color])\n",
    "hbox4"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "create_gif = widgets.Button(\n",
    "    description='Create timelapse',\n",
    "    button_style='primary',\n",
    "    tooltip='Click to create timelapse',\n",
    "    style=style\n",
    ")\n",
    "\n",
    "download_gif = widgets.Button(\n",
    "    description='Download GIF',\n",
    "    button_style='primary',\n",
    "    tooltip='Click to download timelapse',\n",
    "    disabled=False,\n",
    "    style=style\n",
    ")\n",
    "\n",
    "output = widgets.Output()\n",
    "\n",
    "hbox5 = widgets.HBox([create_gif])\n",
    "hbox5"
   ]
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   "cell_type": "code",
   "execution_count": null,
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   "source": [
    "def submit_clicked(b):\n",
    "    \n",
    "    with output:\n",
    "        output.clear_output()\n",
    "        if start_year.value > end_year.value:\n",
    "            print('The end year must be great than the start year.')\n",
    "            return\n",
    "        if start_month.value > end_month.value:\n",
    "            print('The end month must be great than the start month.')\n",
    "            return        \n",
    "        if start_year.value == end_year.value:\n",
    "            add_progress_bar = False\n",
    "        else:\n",
    "            add_progress_bar = True\n",
    "            \n",
    "        start_date = str(start_month.value).zfill(2) + '-01'\n",
    "        end_date = str(end_month.value).zfill(2) + '-30'\n",
    "        \n",
    "        print('Computing...')\n",
    "        \n",
    "        Map.add_landsat_ts_gif(roi=Map.user_roi, label=title.value, start_year=start_year.value, \n",
    "                               end_year=end_year.value, start_date=start_date, end_date=end_date, \n",
    "                               bands=bands.value.split('/'), font_color=font_color.value, \n",
    "                               frames_per_second=speed.value, font_size=font_size.value, \n",
    "                               add_progress_bar= add_progress_bar, progress_bar_color=progress_bar_color.value, \n",
    "                               download=True, apply_fmask=cloud.value) \n",
    "            \n",
    "create_gif.on_click(submit_clicked)"
   ]
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   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
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    "output"
   ]
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