-- OpenGlasses 2 AR Control System v3.0
-- CORRECTED API VERSION

local component = require("component")
local event = require("event")
local term = require("term")
local computer = require("computer")
local serialization = require("serialization")
local filesystem = require("filesystem")

-- Components
local gpu = component.gpu
local glasses = component.glasses
local nav = component.navigation
local radar = component.radar
local geo = component.geolyzer or nil

-- Configuration
local config = {
  radarEnabled = false,
  radarRange = 64,
  radarUpdateInterval = 0.5,

  fullbrightEnabled = false,
  fullbrightOpacity = 0.3,

  geolyserEnabled = false,
  geolyserRadius = 8,
  geolyserDepth = 32,

  hudEnabled = true,
  showCoordinates = true,
  showCompass = true,

  colors = {
    player = 0x00FF00,
    hostile = 0xFF0000,
    passive = 0x00FFFF,
    item = 0xFFFF00,
    waypoint = 0xFFFFFF,
    ore = 0xFFAA00
  }
}

-- State
local widgets = {
  radar = {},
  fullbright = nil,
  geolyser = {},
  waypoints = {},
  hud = {}
}

local running = true
local playerPos = {x=0, y=0, z=0}
local playerFacing = 0
local savedWaypoints = {}

-- Utility Functions
local function saveConfig()
  local file = io.open("/home/ar_config.cfg", "w")
  if file then
    file:write(serialization.serialize(config))
    file:close()
  end
end

local function loadConfig()
  if filesystem.exists("/home/ar_config.cfg") then
    local file = io.open("/home/ar_config.cfg", "r")
    if file then
      local content = file:read("*a")
      file:close()
      local success, loaded = pcall(serialization.unserialize, content)
      if success then
        for k, v in pairs(loaded) do
          config[k] = v
        end
      end
    end
  end
end

local function saveWaypoints()
  local file = io.open("/home/ar_waypoints.dat", "w")
  if file then
    file:write(serialization.serialize(savedWaypoints))
    file:close()
  end
end

local function loadWaypoints()
  if filesystem.exists("/home/ar_waypoints.dat") then
    local file = io.open("/home/ar_waypoints.dat", "r")
    if file then
      local content = file:read("*a")
      file:close()
      local success, loaded = pcall(serialization.unserialize, content)
      if success then
        savedWaypoints = loaded
      end
    end
  end
end

local function updatePlayerPos()
  local x, y, z = nav.getPosition()
  playerPos = {x=math.floor(x), y=math.floor(y), z=math.floor(z)}
  playerFacing = nav.getFacing()
end

local function getDistance(x1, y1, z1, x2, y2, z2)
  return math.sqrt((x2-x1)^2 + (y2-y1)^2 + (z2-z1)^2)
end

local function getCardinalDirection(yaw)
  yaw = yaw % 360
  if yaw < 0 then yaw = yaw + 360 end

  if yaw >= 337.5 or yaw < 22.5 then return "S"
  elseif yaw >= 22.5 and yaw < 67.5 then return "SW"
  elseif yaw >= 67.5 and yaw < 112.5 then return "W"
  elseif yaw >= 112.5 and yaw < 157.5 then return "NW"
  elseif yaw >= 157.5 and yaw < 202.5 then return "N"
  elseif yaw >= 202.5 and yaw < 247.5 then return "NE"
  elseif yaw >= 247.5 and yaw < 292.5 then return "E"
  elseif yaw >= 292.5 and yaw < 337.5 then return "SE"
  end
  return "?"
end

-- Widget Management
local function clearAllWidgets()
  glasses.removeAll()
  widgets.radar = {}
  widgets.fullbright = nil
  widgets.geolyser = {}
  widgets.waypoints = {}
  widgets.hud = {}
end

local function clearRadar()
  for _, widget in pairs(widgets.radar) do
    if widget and widget.removeWidget then
      widget.removeWidget()
    end
  end
  widgets.radar = {}
end

local function clearGeolyser()
  for _, widget in pairs(widgets.geolyser) do
    if widget and widget.removeWidget then
      widget.removeWidget()
    end
  end
  widgets.geolyser = {}
end

local function clearHUD()
  for _, widget in pairs(widgets.hud) do
    if widget and widget.removeWidget then
      widget.removeWidget()
    end
  end
  widgets.hud = {}
end

local function clearWaypoints()
  for _, widget in pairs(widgets.waypoints) do
    if widget and widget.removeWidget then
      widget.removeWidget()
    end
  end
  widgets.waypoints = {}
end

-- Fullbright
local function enableFullbright()
  if widgets.fullbright then
    widgets.fullbright.removeWidget()
  end

  -- Create fullscreen bright overlay
  widgets.fullbright = glasses.addQuad2D()
  widgets.fullbright.addPoint(-500, -500)
  widgets.fullbright.addPoint(500, -500)
  widgets.fullbright.addPoint(500, 500)
  widgets.fullbright.addPoint(-500, 500)
  widgets.fullbright.setColor(255, 255, 255)
  widgets.fullbright.setAlpha(config.fullbrightOpacity)

  config.fullbrightEnabled = true
end

local function disableFullbright()
  if widgets.fullbright then
    widgets.fullbright.removeWidget()
    widgets.fullbright = nil
  end
  config.fullbrightEnabled = false
end

-- HUD
local function updateHUD()
  if not config.hudEnabled then return end

  clearHUD()
  updatePlayerPos()

  -- Coordinates text
  if config.showCoordinates then
    local coordText = glasses.addText2D()
    coordText.addText(5, 5, string.format("XYZ: %d, %d, %d", playerPos.x, playerPos.y, playerPos.z))
    coordText.setColor(255, 255, 255)
    table.insert(widgets.hud, coordText)
  end

  -- Compass text
  if config.showCompass then
    local direction = getCardinalDirection(playerFacing)
    local compassText = glasses.addText2D()
    compassText.addText(5, 15, string.format("Facing: %s (%.1f°)", direction, playerFacing))
    compassText.setColor(255, 255, 0)
    table.insert(widgets.hud, compassText)
  end

  -- Status text
  local statusText = glasses.addText2D()
  local status = {}
  if config.radarEnabled then table.insert(status, "RADAR") end
  if config.fullbrightEnabled then table.insert(status, "BRIGHT") end
  if config.geolyserEnabled then table.insert(status, "GEO") end

  if #status > 0 then
    statusText.addText(5, 25, "Active: " .. table.concat(status, " | "))
  else
    statusText.addText(5, 25, "All systems standby")
  end
  statusText.setColor(0, 255, 0)
  table.insert(widgets.hud, statusText)
end

-- Radar
local function updateRadar()
  if not config.radarEnabled then return end

  clearRadar()
  updatePlayerPos()

  local entities = radar.getPlayers(config.radarRange)

  for _, ent in ipairs(entities) do
    local dist = getDistance(playerPos.x, playerPos.y, playerPos.z, ent.x, ent.y, ent.z)

    -- Skip if too close (probably the player)
    if dist > 1 then
      local color = config.colors.player
      local isHostile = false

      -- Classify entity
      local name = ent.name or "Unknown"
      if name:match("Creeper") or name:match("Zombie") or name:match("Skeleton") or
         name:match("Spider") or name:match("Witch") or name:match("Enderman") then
        color = config.colors.hostile
        isHostile = true
      elseif name:match("Cow") or name:match("Sheep") or name:match("Pig") or
             name:match("Chicken") or name:match("Horse") then
        color = config.colors.passive
      end

      -- Create 3D marker
      local dot = glasses.addDot3D()
      dot.set3DPos(ent.x, ent.y + 1, ent.z)
      dot.setColor((color >> 16) & 0xFF, (color >> 8) & 0xFF, color & 0xFF)
      dot.setSize(isHostile and 3 or 2)
      dot.setAlpha(0.9)

      -- Create 3D label
      local label = glasses.addText3D()
      label.set3DPos(ent.x, ent.y + 2, ent.z)
      label.setText(string.format("%s %.1fm", name, dist))
      label.setColor((color >> 16) & 0xFF, (color >> 8) & 0xFF, color & 0xFF)
      label.setAlpha(0.8)

      -- Add danger warning for nearby hostiles
      if isHostile and dist < 10 then
        local warning = glasses.addText3D()
        warning.set3DPos(ent.x, ent.y + 2.5, ent.z)
        warning.setText("! DANGER !")
        warning.setColor(255, 0, 0)
        warning.setAlpha(1.0)
        table.insert(widgets.radar, warning)
      end

      table.insert(widgets.radar, dot)
      table.insert(widgets.radar, label)
    end
  end
end

-- Geolyser
local function isOre(hardness)
  return hardness >= 3 and hardness <= 5
end

local function updateGeolyser()
  if not config.geolyserEnabled or not geo then return end

  clearGeolyser()
  updatePlayerPos()

  local radius = config.geolyserRadius
  local depth = config.geolyserDepth
  local foundOres = 0

  -- Scan in layers
  for y = 0, -depth, -2 do
    local scan = geo.scan(playerPos.x, playerPos.y + y, playerPos.z, radius, radius, 1)
    local idx = 1

    for dx = -radius, radius-1 do
      for dz = -radius, radius-1 do
        local hardness = scan[idx]
        idx = idx + 1

        if hardness and isOre(hardness) then
          local wx = playerPos.x + dx
          local wy = playerPos.y + y
          local wz = playerPos.z + dz

          local cube = glasses.addCube3D()
          cube.set3DPos(wx + 0.5, wy + 0.5, wz + 0.5)
          cube.setColor(255, 170, 0)
          cube.setAlpha(0.4)
          cube.setVisibleThroughObjects(true)

          table.insert(widgets.geolyser, cube)
          foundOres = foundOres + 1
        end
      end
    end
  end

  -- Show ore count in HUD
  if foundOres > 0 then
    local oreText = glasses.addText2D()
    oreText.addText(5, 35, string.format("Ores detected: %d", foundOres))
    oreText.setColor(255, 170, 0)
    table.insert(widgets.hud, oreText)
  end
end

-- Waypoint Management
local function addWaypoint(name, x, y, z, color)
  color = color or config.colors.waypoint

  local marker = glasses.addDot3D()
  marker.set3DPos(x, y, z)
  marker.setColor((color >> 16) & 0xFF, (color >> 8) & 0xFF, color & 0xFF)
  marker.setSize(4)
  marker.setAlpha(1.0)

  local label = glasses.addText3D()
  label.set3DPos(x, y + 1, z)
  updatePlayerPos()
  local dist = getDistance(playerPos.x, playerPos.y, playerPos.z, x, y, z)
  label.setText(string.format("%s %.1fm", name, dist))
  label.setColor((color >> 16) & 0xFF, (color >> 8) & 0xFF, color & 0xFF)

  table.insert(widgets.waypoints, marker)
  table.insert(widgets.waypoints, label)
end

local function refreshWaypoints()
  clearWaypoints()
  for _, wp in ipairs(savedWaypoints) do
    addWaypoint(wp.name, wp.x, wp.y, wp.z, wp.color)
  end
end

-- UI Drawing
local function drawMenu()
  term.clear()
  gpu.setBackground(0x000000)
  gpu.setForeground(0xFFFFFF)

  print("╔═════════════════════════════════════════════╗")
  print("║   OpenGlasses 2 AR Control System v3.0     ║")
  print("╚═════════════════════════════════════════════╝")
  print()

  updatePlayerPos()
  print(string.format("Position: %d, %d, %d | Facing: %s",
    playerPos.x, playerPos.y, playerPos.z, getCardinalDirection(playerFacing)))
  print()

  print("╔═══ FEATURES ═══════════════════════════════╗")
  print(string.format("║ [1] Radar:      %-7s Range: %2dm    ║",
    config.radarEnabled and "ON" or "OFF", config.radarRange))
  print(string.format("║ [2] Fullbright: %-7s Opacity: %3d%% ║",
    config.fullbrightEnabled and "ON" or "OFF", math.floor(config.fullbrightOpacity * 100)))

  if geo then
    print(string.format("║ [3] Geolyser:   %-7s R:%2d D:%2d   ║",
      config.geolyserEnabled and "ON" or "OFF", config.geolyserRadius, config.geolyserDepth))
  else
    print("║ [3] Geolyser:   N/A (no geolyzer)      ║")
  end

  print(string.format("║ [4] HUD:        %-7s                ║",
    config.hudEnabled and "ON" or "OFF"))
  print("╚════════════════════════════════════════════╝")
  print()

  print("╔═══ WAYPOINTS ══════════════════════════════╗")
  print("║ [W] Add Waypoint at Current Position      ║")
  print("║ [L] List Waypoints                         ║")
  print("║ [D] Delete Waypoint                        ║")
  print(string.format("║     Total Waypoints: %-3d                  ║", #savedWaypoints))
  print("╚════════════════════════════════════════════╝")
  print()

  print("╔═══ SETTINGS ═══════════════════════════════╗")
  print("║ [R] Adjust Radar Range                     ║")
  print("║ [F] Adjust Fullbright Opacity              ║")
  if geo then
    print("║ [G] Adjust Geolyser Settings               ║")
  end
  print("║ [H] Toggle HUD Elements                    ║")
  print("╚════════════════════════════════════════════╝")
  print()

  print("╔═══ SYSTEM ═════════════════════════════════╗")
  print("║ [C] Clear All Widgets                      ║")
  print("║ [S] Save Configuration                     ║")
  print("║ [Q] Quit                                   ║")
  print("╚════════════════════════════════════════════╝")
  print()
  print("Press a key to select option...")
end

local function listWaypoints()
  term.clear()
  print("╔═══ WAYPOINTS ══════════════════════════════╗")
  if #savedWaypoints == 0 then
    print("║ No waypoints saved                         ║")
  else
    for i, wp in ipairs(savedWaypoints) do
      print(string.format("║ %2d. %-20s (%d,%d,%d) ║",
        i, wp.name:sub(1,20), wp.x, wp.y, wp.z))
    end
  end
  print("╚════════════════════════════════════════════╝")
  print("\nPress any key to continue...")
  event.pull("key_down")
end

-- Event Handlers
local function handleInput(char, code)
  if char == 0 then return end

  local key = string.char(char):lower()

  if key == "1" then
    config.radarEnabled = not config.radarEnabled
    if config.radarEnabled then
      updateRadar()
    else
      clearRadar()
    end
    updateHUD()

  elseif key == "2" then
    if config.fullbrightEnabled then
      disableFullbright()
    else
      enableFullbright()
    end
    updateHUD()

  elseif key == "3" and geo then
    config.geolyserEnabled = not config.geolyserEnabled
    if config.geolyserEnabled then
      updateGeolyser()
    else
      clearGeolyser()
    end
    updateHUD()

  elseif key == "4" then
    config.hudEnabled = not config.hudEnabled
    if config.hudEnabled then
      updateHUD()
    else
      clearHUD()
    end

  elseif key == "w" then
    term.clear()
    print("Add Waypoint at Current Position")
    updatePlayerPos()
    print(string.format("Position: %d, %d, %d", playerPos.x, playerPos.y, playerPos.z))
    print("\nEnter waypoint name:")
    local name = io.read()
    if name and name ~= "" then
      table.insert(savedWaypoints, {
        name = name,
        x = playerPos.x,
        y = playerPos.y,
        z = playerPos.z,
        color = config.colors.waypoint
      })
      saveWaypoints()
      refreshWaypoints()
      print("\nWaypoint added!")
      os.sleep(1)
    end

  elseif key == "l" then
    listWaypoints()

  elseif key == "d" then
    if #savedWaypoints == 0 then
      term.clear()
      print("No waypoints to delete!")
      os.sleep(1)
      return
    end
    listWaypoints()
    print("\nEnter waypoint number to delete (or 0 to cancel):")
    local num = tonumber(io.read())
    if num and num > 0 and num <= #savedWaypoints then
      table.remove(savedWaypoints, num)
      saveWaypoints()
      refreshWaypoints()
      print("Waypoint deleted!")
      os.sleep(1)
    end

  elseif key == "r" then
    term.clear()
    print(string.format("Current radar range: %dm", config.radarRange))
    print("Enter new range (1-64):")
    local range = tonumber(io.read())
    if range and range >= 1 and range <= 64 then
      config.radarRange = range
      if config.radarEnabled then
        updateRadar()
      end
    end

  elseif key == "f" then
    term.clear()
    print(string.format("Current fullbright opacity: %d%%",
      math.floor(config.fullbrightOpacity * 100)))
    print("Enter new opacity (0-100):")
    local opacity = tonumber(io.read())
    if opacity and opacity >= 0 and opacity <= 100 then
      config.fullbrightOpacity = opacity / 100
      if config.fullbrightEnabled then
        disableFullbright()
        enableFullbright()
      end
    end

  elseif key == "g" and geo then
    term.clear()
    print(string.format("Current radius: %dm", config.geolyserRadius))
    print("Enter new radius (1-16):")
    local radius = tonumber(io.read())
    if radius and radius >= 1 and radius <= 16 then
      config.geolyserRadius = radius
    end
    print(string.format("Current depth: %dm", config.geolyserDepth))
    print("Enter new depth (1-64):")
    local depth = tonumber(io.read())
    if depth and depth >= 1 and depth <= 64 then
      config.geolyserDepth = depth
    end
    if config.geolyserEnabled then
      updateGeolyser()
    end

  elseif key == "h" then
    term.clear()
    print("HUD Element Toggles:")
    print(string.format("[1] Coordinates: %s", config.showCoordinates and "ON" or "OFF"))
    print(string.format("[2] Compass: %s", config.showCompass and "ON" or "OFF"))
    print("\nEnter option (1-2):")
    local opt = io.read()
    if opt == "1" then
      config.showCoordinates = not config.showCoordinates
    elseif opt == "2" then
      config.showCompass = not config.showCompass
    end
    updateHUD()

  elseif key == "c" then
    clearAllWidgets()
    config.radarEnabled = false
    config.fullbrightEnabled = false
    config.geolyserEnabled = false
    config.hudEnabled = false

  elseif key == "s" then
    saveConfig()
    term.clear()
    print("Configuration saved!")
    os.sleep(1)

  elseif key == "q" then
    running = false
  end
end

-- Main Loop
local function mainLoop()
  local lastRadarUpdate = 0
  local lastGeoUpdate = 0
  local lastHUDUpdate = 0

  while running do
    drawMenu()

    local currentTime = computer.uptime()

    -- Update radar
    if config.radarEnabled and (currentTime - lastRadarUpdate) > config.radarUpdateInterval then
      updateRadar()
      lastRadarUpdate = currentTime
    end

    -- Update geolyser
    if config.geolyserEnabled and (currentTime - lastGeoUpdate) > 5 then
      updateGeolyser()
      lastGeoUpdate = currentTime
    end

    -- Update HUD
    if config.hudEnabled and (currentTime - lastHUDUpdate) > 1 then
      updateHUD()
      lastHUDUpdate = currentTime
    end

    -- Input handling
    local eventType, _, char, code = event.pull(0.1, "key_down")
    if eventType == "key_down" then
      handleInput(char, code)
    end
  end
end

-- Initialization
term.clear()
print("╔═══════════════════════════════════════════╗")
print("║  OpenGlasses 2 AR Control System v3.0    ║")
print("║          Initializing...                  ║")
print("╚═══════════════════════════════════════════╝")
print()

-- Check components
print("Checking components...")
if not component.isAvailable("glasses") then
  print("✗ ERROR: OpenGlasses Terminal not found!")
  return
else
  print("✓ OpenGlasses Terminal found")
end

if not component.isAvailable("navigation") then
  print("✗ ERROR: Navigation upgrade not found!")
  return
else
  print("✓ Navigation upgrade found")
end

if not component.isAvailable("radar") then
  print("✗ ERROR: Radar upgrade not found!")
  return
else
  print("✓ Radar upgrade found")
end

if not component.isAvailable("geolyzer") then
  print("⚠ WARNING: Geolyzer not found (feature disabled)")
else
  print("✓ Geolyzer found")
end

print()
print("Loading configuration...")
loadConfig()
loadWaypoints()

print("✓ Configuration loaded")
print()
print("Refreshing waypoints...")
refreshWaypoints()

if config.hudEnabled then
  updateHUD()
end

print()
print("✓ All systems ready!")
os.sleep(2)

-- Run
clearAllWidgets()
mainLoop()

-- Cleanup
clearAllWidgets()
saveConfig()
saveWaypoints()
term.clear()
print("AR Control System shutdown complete.")
print("Configuration and waypoints saved.")