import json

import dearpygui.dearpygui as dpg

from vrutil.utils import loaded, store

_STEAM_VR_SETTINGS_FILE = '{steam_dir}/config/steamvr.vrsettings'


class SteamVrSettings:
    """Steam VR related settings"""

    def __init__(self, steam_dir):
        self._settings_file_path = _STEAM_VR_SETTINGS_FILE.format(steam_dir=steam_dir)
        self._enable_vulkan_async_item = None

    def create_views(self):
        with dpg.collapsing_header(label='Steam VR', default_open=True):

            self._enable_vulkan_async_item = dpg.add_checkbox(
                    label='enableLinuxVulkanAsync',
                    default_value=self._is_vulkan_async_enabled(),
                    callback=self._enable_vulkan_async,
                )

            dpg.add_spacer(height=10)

    def reload(self, steam_dir=None):
        if steam_dir is not None:
            self._settings_file_path = _STEAM_VR_SETTINGS_FILE.format(steam_dir=steam_dir)
        dpg.set_value(self._enable_vulkan_async_item, self._is_vulkan_async_enabled())

    def _is_vulkan_async_enabled(self):
        with open(self._settings_file_path, 'r') as f:
            data_content = json.load(f)
        enabled = data_content['steamvr']['enableLinuxVulkanAsync']
        loaded('SteamVR enableLinuxVulkanAsync', enabled)
        return enabled

    def _enable_vulkan_async(self, _sender, enabled, _user_data):
        store('SteamVR enableLinuxVulkanAsync', enabled)
        with open(self._settings_file_path, 'r') as f:
            data_content = json.load(f)
        data_content['steamvr']['enableLinuxVulkanAsync'] = enabled
        with open(self._settings_file_path, 'w') as f:
            json.dump(data_content, f, indent=3, separators=(',', ' : '))
        self.reload()