blueprint_gui

local termWidth, termHeight = term.getSize()
local blueprints = fs.list("/bps")
local selectedBlueprintIndex = -1
local currentBlueprint

local BP_LIST_W = 18
local BP_DATA_X = BP_LIST_W + 2
local BP_DATA_W = 18

-- black out
paintutils.drawFilledBox(1, 1, termWidth, termHeight, colors.black)

function checkBuilditClick(x, y)
  if x >= BP_DATA_X + 9 and x <= BP_DATA_X + 19 and y == 13 then
    if selectedBlueprintIndex ~= -1 then
      shell.run("blueprint_builder " .. blueprints[selectedBlueprintIndex])
    end
  end
end

function drawBuildButton()
  term.setCursorPos(BP_DATA_X + 9, 13)
  term.setBackgroundColor(colors.green)
  term.setTextColor(colors.lime)
  term.write("[Build It]")
end

function formatMaterial(s, count)
  local colonIndex = string.find(s, ":")
  if colonIndex then
    s = string.sub(s, colonIndex+1, string.len(s))
  end
  return string.sub(count .. ": " ..s, 1, BP_DATA_W)
end

function drawBlueprintData()
  -- Draw the data Header
  term.setBackgroundColor(colors.black)
  term.setTextColor(colors.lightGray)
  term.setCursorPos(BP_DATA_X, 3)
  print("Required Blocks")

  paintutils.drawFilledBox(BP_DATA_X, 4, BP_DATA_X + BP_DATA_W, 10, colors.gray)

  if currentBlueprint then
    local matY = 4
    term.setTextColor(colors.white)
    for k, v in pairs(currentBlueprint.quantities) do
      if matY <= 10 then
        term.setCursorPos(BP_DATA_X, matY)
        term.write(formatMaterial(k, v))
      end
      matY = matY + 1
    end
  end

  term.setCursorPos(1, 12)
  term.setBackgroundColor(colors.black)
  print("Dimensions")
  paintutils.drawLine(1, 13, BP_DATA_W, 13, colors.gray)
  term.setCursorPos(1, 13)
  term.setBackgroundColor(colors.gray)
  -- buid a string for the dimensions
  if currentBlueprint then
    local dimString = string.format("H:%d W:%d D:%d", currentBlueprint.dimensions.height, currentBlueprint.dimensions.width, currentBlueprint.dimensions.depth)
    term.write(dimString)
  end
end

function drawCloseButton()
  -- Draw an X button in the top Right
  term.setCursorPos(termWidth, 1)
  term.setBackgroundColor(colors.gray)
  term.setTextColor(colors.lightGray)
  print("x")
end

function drawMainMenu()
  -- Draw the [Builder] button
  term.setCursorPos(1, 1)
  term.setBackgroundColor(colors.orange)
  term.setTextColor(colors.gray)
  print("[Builder]")
  paintutils.drawLine(10,1, termWidth-1, 1, colors.lightGray)

  drawCloseButton()
end

function getBlueprints()
  local bp = {}
  for key, value in pairs(blueprints) do
    if string.len(value) > BP_LIST_W then
      bp[key] = string.sub(blueprints[key], 1, BP_LIST_W-2) .. ".."
    else
      bp[key] = blueprints[key]
    end
  end
  return bp
end

function drawBlueprintsList()
  -- The header
  term.setCursorPos(1, 3)
  term.setBackgroundColor(colors.black)
  term.setTextColor(colors.lightGray)
  print("Blueprints")

  -- The list of blueprints to click on
  paintutils.drawFilledBox(1, 4, BP_LIST_W, 10, colors.gray)
  term.setBackgroundColor(colors.gray)
  term.setTextColor(colors.white)
  local yStart = 4
  for key, value in pairs(getBlueprints()) do
    if selectedBlueprintLine == yStart then
      term.setBackgroundColor(colors.cyan)
      paintutils.drawLine(1, yStart, BP_LIST_W, yStart, colors.cyan)
    else
      term.setBackgroundColor(colors.gray)
      paintutils.drawLine(1, yStart, BP_LIST_W, yStart, colors.gray)
    end
    term.setCursorPos(1, yStart)
    print(value)
    yStart = yStart + 1
  end
end

function checkBlueprintsClick(x, y)
  if x < BP_LIST_W and y >= 4 and y <= 10 then
    selectedBlueprintLine = y
    drawBlueprintsList()
    loadNewBlueprint()
  end
end

function loadNewBlueprint()
  local bpFile = fs.open("/bps/" .. blueprints[selectedBlueprintLine - 3], "r")
  currentBlueprint = textutils.unserialise(bpFile.readAll())
  selectedBlueprintIndex = selectedBlueprintLine - 3
  bpFile.close()
  drawBlueprintData()
end

drawMainMenu()
drawBlueprintsList()
drawBlueprintData()
drawBuildButton()

while true do
  local event, button, x, y = os.pullEventRaw()
  if event == "mouse_click" then
    if x == termWidth and y == 1 then
      term.setBackgroundColor(colors.black)
      shell.run("clear")
      return -- close program
    end

    checkBlueprintsClick(x, y)
    checkBuilditClick(x, y)
  end
end