-- Navigation System for Virtual Smartphone
-- Handles screen transitions and state management

-- Screen registry
local screens = {
    home = "screens/home.rml",
    lock = "screens/lock.rml",
    dialer = "screens/dialer.rml",
    contacts = "screens/contacts.rml",
    messages = "screens/messages.rml",
    settings = "screens/settings.rml",
    browser = "screens/browser.rml"
}

-- Current screen state
local current_screen = "home"
local screen_history = {}

-- Navigate to a screen
function navigateTo(screen_name)
    if screens[screen_name] then
        -- Add current screen to history
        table.insert(screen_history, current_screen)
        current_screen = screen_name

        -- Load the new document
        -- Note: In RmlUi, we'd typically use document loading
        print("Navigating to: " .. screen_name)
    else
        print("Unknown screen: " .. screen_name)
    end
end

-- Go back to previous screen
function goBack()
    if #screen_history > 0 then
        current_screen = table.remove(screen_history)
        print("Going back to: " .. current_screen)
    else
        print("No history to go back to")
    end
end

-- Get current screen name
function getCurrentScreen()
    return current_screen
end

-- Clear navigation history
function clearHistory()
    screen_history = {}
end

print("Navigation system initialized")