asset.require('./static_server')

local guiCustomization = asset.require('customization/gui')

-- Select which commit hashes to use for the frontend and backend
local frontendHash = "da6b14e4f2f40a8e6340de3251839ff09970b005"
local dataProvider = "data.openspaceproject.com/files/webgui"

local frontend = asset.syncedResource({
    Identifier = "WebGuiFrontend",
    Name = "Web Gui Frontend",
    Type = "UrlSynchronization",
    Url = dataProvider .. "/frontend/" ..  frontendHash .. "/frontend.zip"
})

asset.onInitialize(function ()
    -- Unzip the frontend bundle
    local dest = frontend .. "/frontend"
    if not openspace.directoryExists(dest) then
        openspace.unzipFile(frontend .. "/frontend.zip", dest, true)
    end

    -- Disable the server, add production gui endpoint, and restart server.
    -- The temporary disabling avoids restarting the server on each property change.
    -- TODO: Add a trigger property to the module to restart the server "manually"
    -- and remove automatic restart on each property change,
    -- since frequent restarting seems to be unstable on mac.

    local enabled = openspace.getPropertyValue("Modules.WebGui.ServerProcessEnabled")
    openspace.setPropertyValueSingle("Modules.WebGui.ServerProcessEnabled", false)

    local directories = openspace.getPropertyValue("Modules.WebGui.Directories")
    directories[#directories + 1] = "frontend"
    directories[#directories + 1] = frontend .. '/frontend'

    openspace.setPropertyValueSingle("Modules.WebGui.Directories", directories)
    openspace.setPropertyValueSingle("Modules.WebGui.DefaultEndpoint", "frontend")
    openspace.setPropertyValueSingle("Modules.WebGui.ServerProcessEnabled", enabled)

    -- The GUI contains date and simulation increment,
    -- so let's remove these from the dashboard.
    if openspace.getPropertyValue('Modules.CefWebGui.Visible') then
        if openspace.hasProperty('Dashboard.Date.Enabled') then
            openspace.setPropertyValueSingle('Dashboard.Date.Enabled', false)
        end
        if openspace.hasProperty('Dashboard.SimulationIncrement.Enabled') then
            openspace.setPropertyValueSingle('Dashboard.SimulationIncrement.Enabled', false)
        end
    end
end)

asset.onDeinitialize(function ()
    -- Remove the frontend endpoint
    local directories = openspace.getPropertyValue("Modules.WebGui.Directories")
    local newDirectories = {};

    -- @TODO(maci, 2019-08-23) see message below
    --openspace.setPropertyValueSingle("Modules.WebGui.DefaultEndpoint", "")

    for i = 0, #directories, 2 do
        -- @TODO(abock, 2019-08-20) The explicit check for directories[i] is a workaround
        -- for an error that was otherwise thrown when directories[i] was nil
        if (directories[i] and string.find(directories[i], "frontend") == nil) then
            newDirectories[#newDirectories + 1] = directories[i]
            newDirectories[#newDirectories + 1] = directories[i + 1]
        end
    end
    -- @TODO(maci, 2019-08-23) setting this value on exit was causing the server to restart
    -- on macos, which in turn, stopped the application from exiting. 
    -- need to address in webguimodule.cpp
    --openspace.setPropertyValueSingle("Modules.WebGui.Directories", newDirectories)
end)

function setCefRoute(route)
    local port = 4680
    -- As a developer, you can manually serve the webgui from port 4690
    -- with the command `npm start` in the web gui repository
    if guiCustomization.webguiDevelopmentMode then
        port = 4690
    end
    openspace.setPropertyValueSingle(
        "Modules.CefWebGui.GuiUrl",
        "http://127.0.0.1:" .. port .. "/frontend/#/" .. route
    )
end


asset.export("setCefRoute", setCefRoute)


asset.meta = {
    Name = "WebGUI",
    Version = "0.1",
    Description = [[ insert CEF rant ]],
    Author = "OpenSpace Team",
    URL = "http://openspaceproject.com",
    License = "MIT license"
}