-- redstonecontrol.lua
-- Remote redstone control via ender modem
-- Requires a remote computer running redstoneremote.lua

------------- Config -------------
local MONITOR_SIDE = "top"      -- side where the monitor is attached
local CHANNEL = "redstone_1"    -- communication channel (change this to run multiple instances)
local REMOTE_COMPUTER = 15      -- ID of remote computer with redstone (find via "list" command)
---------------------------------

local mon = peripheral.wrap(MONITOR_SIDE)
if not mon then
  error("No monitor found on side: " .. MONITOR_SIDE)
end

-- Open modem
for _, side in ipairs(rs.getSides()) do
  if peripheral.getType(side) == "modem" then
    rednet.open(side)
  end
end

-- Auto-scale monitor
local function setupMonitor()
  local scales = {5, 3, 2, 1.5, 1, 0.5}
  for _, scale in ipairs(scales) do
    mon.setTextScale(scale)
    local w, h = mon.getSize()
    if w >= 10 and h >= 6 then
      return scale, w, h
    end
  end
  return 0.5, mon.getSize()
end

local scale, width, height = setupMonitor()

-- Draw button function
local function drawButton(x, y, w, h, text, bgColor, textColor)
  mon.setBackgroundColor(bgColor)
  mon.setTextColor(textColor)
  
  for row = y, y + h - 1 do
    mon.setCursorPos(x, row)
    mon.write(string.rep(" ", w))
  end
  
  local textX = x + math.floor((w - #text) / 2)
  local textY = y + math.floor(h / 2)
  mon.setCursorPos(textX, textY)
  mon.write(text)
end

-- Draw the interface
local function drawInterface(redstoneOn)
  mon.setBackgroundColor(colors.black)
  mon.clear()
  
  -- Title
  mon.setTextColor(colors.white)
  mon.setCursorPos(2, 2)
  mon.write("Redstone Control")
  
  -- Status
  mon.setCursorPos(2, 3)
  if redstoneOn then
    mon.setTextColor(colors.lime)
    mon.write("Status: ON")
  else
    mon.setTextColor(colors.red)
    mon.write("Status: OFF")
  end
  
  -- Green ON button
  local onY = math.floor(height / 2) - 1
  drawButton(2, onY, 8, 3, "ON", colors.lime, colors.white)
  
  -- Red OFF button
  local offX = width - 9
  drawButton(offX, onY, 8, 3, "OFF", colors.red, colors.white)
end

-- Check if click is within button bounds
local function isInButton(x, y, btnX, btnY, btnW, btnH)
  return x >= btnX and x < btnX + btnW and y >= btnY and y < btnY + btnH
end

-- Main program
local redstoneActive = false

-- Send command to remote computer
local function sendCommand(state)
  rednet.send(REMOTE_COMPUTER, {action = state}, CHANNEL)
end

drawInterface(redstoneActive)

print("Redstone Control active")
print("Remote computer ID: " .. REMOTE_COMPUTER)
print("Touch monitor to control")

while true do
  local event, side, x, y = os.pullEvent("monitor_touch")
  
  if side == MONITOR_SIDE then
    local onY = math.floor(height / 2) - 1
    local onX = 2
    local offX = width - 9
    
    -- Check ON button (green)
    if isInButton(x, y, onX, onY, 8, 3) then
      redstoneActive = true
      sendCommand("on")
      drawInterface(redstoneActive)
      print("Redstone ON")
    end
    
    -- Check OFF button (red)
    if isInButton(x, y, offX, onY, 8, 3) then
      redstoneActive = false
      sendCommand("off")
      drawInterface(redstoneActive)
      print("Redstone OFF")
    end
  end
end