TEST APPS

-- gps_status_gui_error_in_dashboard.lua

-- Function to check GPS status by attempting to get a location
local function checkGPS()
    local success, latitude, longitude = gps.locate(5) -- 5 second timeout
    if success then
        return true
    else
        return false, "Failed to retrieve GPS data"
    end
end

-- Function to find a connected monitor
local function findMonitor()
    for _, side in ipairs(peripheral.getNames()) do
        if peripheral.getType(side) == "monitor" then
            return peripheral.wrap(side)
        end
    end
    return nil
end

-- Function to create a dashboard UI window
local function createWindow(monitor)
    local width, height = monitor.getSize()
    monitor.clear()
    monitor.setBackgroundColor(colors.black)
    monitor.setTextColor(colors.white)

    -- Title bar with border
    monitor.setBackgroundColor(colors.blue)
    monitor.setCursorPos(1, 1)
    for x = 1, width do
        monitor.write(" ")
    end
    monitor.setTextColor(colors.white)
    monitor.setCursorPos(math.floor((width - 20) / 2), 1)
    monitor.write("GPS Status Dashboard")

    return width, height
end

-- Function to update the GPS status on the monitor
local function updateStatus(monitor, width, height, status, errorMessage)
    -- GPS Status Section
    monitor.setCursorPos(2, 3)
    monitor.setTextColor(colors.lightGray)
    monitor.write("GPS Status: ")

    if status then
        monitor.setTextColor(colors.green)
        monitor.write("Active")
    else
        monitor.setTextColor(colors.red)
        monitor.write("ERROR: " .. errorMessage)
    end

    -- Info Section with GPS Data Display
    monitor.setTextColor(colors.white)
    monitor.setCursorPos(2, 5)
    monitor.write("Last checked: " .. textutils.formatTime(os.time(), true))

    -- Additional Info
    monitor.setCursorPos(2, 7)
    monitor.write("GPS Accuracy: High")
end

-- Function to flash the error message status text between red and white
local function flashErrorStatus(monitor, width, height)
    local flashes = 6
    local flashDelay = 0.5
    local flashColors = {colors.red, colors.white}  -- Alternate between red and white

    -- Create a flashing effect for the "ERROR" status text
    for i = 1, flashes do
        -- Set the text color to the next color in the list
        monitor.setTextColor(flashColors[i % #flashColors + 1])

        -- Set the "ERROR" status text
        monitor.setCursorPos(2, 3)
        monitor.write("GPS Status: ERROR")

        -- Pause for flashing effect
        sleep(flashDelay)

        -- Reset the text color to the opposite color for the next flash
        monitor.setTextColor(flashColors[(i + 1) % #flashColors + 1])
        monitor.setCursorPos(2, 3)
        monitor.write("GPS Status: ERROR")

        -- Pause before the next cycle
        sleep(flashDelay)
    end
end

-- Main loop
local monitor = findMonitor()

if not monitor then
    print("No monitor found. Please connect a monitor.")
    return
end

-- Create the window for displaying status on the monitor (full screen)
local width, height = createWindow(monitor)

while true do
    -- Check GPS status and retrieve data
    local isAvailable, errorMessage = checkGPS()

    -- Update monitor with current GPS status
    if isAvailable then
        updateStatus(monitor, width, height, isAvailable, "")
    else
        updateStatus(monitor, width, height, isAvailable, errorMessage)
        flashErrorStatus(monitor, width, height)  -- Flash the "ERROR" status text
    end

    -- Wait before checking again (0.5 seconds delay)
    sleep(0.5)
end