-- Подключение библиотеки.
local widget = require "widget";

-- Подключение физики.
local physics = require "physics";
physics.start ();

-- Очки в начале игры.
local score = 0;

-- Загрузка фона.
local background = display.newRect (display.contentCenterX, display.contentCenterY, 400, 600);
background:setFillColor (0.50, 0.55, 0.80);

-- Текст очков.
local score_text = display.newText (score, display.contentCenterX, 70, "12084.ttf", 60);
score_text:setFillColor (0.35, 0.45, 0.70);

-- Загрузка круга.
local circle = display.newCircle (display.contentCenterX , 400, 25);
circle:setFillColor (0.35, 0.45, 0.70);
circle.myName = "Circle";

-- Загрузка стен.
-- 1-й ряд.
local wall_1 = display.newRect (30, 270, 300, 18);
wall_1:setFillColor (0.35, 0.45, 0.70);
wall_1.myName = "Wall";

local wall_2 = display.newRect (420, 270, 300, 18);
wall_2:setFillColor (0.35, 0.45, 0.70);
wall_2.myName = "Wall";

-- 2-й ряд.
local wall_3 = display.newRect (290, 170, 300, 18);
wall_3:setFillColor (0.35, 0.45, 0.70);
wall_3.myName = "Wall";

local wall_4 = display.newRect (-100, 170, 300, 18);
wall_4:setFillColor (0.35, 0.45, 0.70);
wall_4.myName = "Wall";

-- 3-й ряд.
local wall_5 = display.newRect (50, 70, 300, 18);
wall_5:setFillColor (0.35, 0.45, 0.70);
wall_5.myName = "Wall";

local wall_6 = display.newRect (440, 70, 300, 18);
wall_6:setFillColor (0.35, 0.45, 0.70);
wall_6.myName = "Wall";

-- 4-й ряд.
local wall_7 = display.newRect (350, -30, 300, 18);
wall_7:setFillColor (0.35, 0.45, 0.70);
wall_7.myName = "Wall";

local wall_8 = display.newRect (-40, -30, 300, 18);
wall_8:setFillColor (0.35, 0.45, 0.70);
wall_8.myName = "Wall";

-- Подключение физики к кругу.
physics.addBody (circle, "dynamic", {radius = 24});
circle.gravityScale = 0;
circle.isSensor = true;
circle.isSleepingAllowed = false;

-- Подключение физики к стенам.
physics.addBody (wall_1, "static");

physics.addBody (wall_2, "static");

physics.addBody (wall_3, "static");

physics.addBody (wall_4, "static");

physics.addBody (wall_5, "static");

physics.addBody (wall_6, "static");

physics.addBody (wall_7, "static");

physics.addBody (wall_8, "static");

-- Добавление ID к кругу.
circle.ID = "Circle";

-- Добавление ID к стенам.
wall_1.ID = "Wall";

wall_2.ID = "Wall";

wall_3.ID = "Wall";

wall_4.ID = "Wall";

wall_5.ID = "Wall";

wall_6.ID = "Wall";

wall_7.ID = "Wall";

wall_8.ID = "Wall";

-- Функция "Движение и генерирование стен".
local function Movement_and_generation_of_walls (event)
local speed = 1.2;

-- Движение стен.
  wall_1.y = wall_1.y + speed;

  wall_2.y = wall_1.y + speed;

  wall_3.y = wall_3.y + speed;

  wall_4.y = wall_3.y + speed;

  wall_5.y = wall_5.y + speed;

  wall_6.y = wall_5.y + speed;

  wall_7.y = wall_7.y + speed;

  wall_8.y = wall_7.y + speed;

-- Генерирование стен.
  if (wall_1.y > 520) then
    wall_1.y = 120;
  elseif (wall_2.y > 520) then
    wall_2.y = 120;
  elseif (wall_3.y > 520) then
    wall_3.y = 120;
  elseif (wall_4.y > 520) then
    wall_4.y = 120;
  elseif (wall_5.y > 520) then
    wall_5.y = 120;
  elseif (wall_6.y > 520) then
    wall_6.y = 120;
  elseif (wall_7.y > 520) then
    wall_7.y = 120;
  elseif (wall_8.y > 520) then
    wall_8.y = 120;
  end
end

Runtime:addEventListener ("enterFrame", Movement_and_generation_of_walls);

-- Функция "Управление кругом".
local function Circle_control (event)

  local circle = event.target;
  local phase = event.phase;

  if ("began" == phase) then
display.currentStage:setFocus (circle);
circle.touchOffsetX = event.x - circle.x;

  elseif ("moved" == phase) then
circle.x = event.x - circle.touchOffsetX;

  elseif ("ended" == phase or "cancelled" == phase) then
display.currentStage:setFocus (nil);
end

  return true;

end

circle:addEventListener ("touch", Circle_control);

-- Функция "Столкновение между кругом и стеной".
local function The_collision_between_the_circle_and_the_wall (self, event)

  if (event.phase == "began") then
    if (self.ID == "Circle" and event.other.ID == "Wall") then
      End_of_the_game ();
    end
  end
end

circle.collision = The_collision_between_the_circle_and_the_wall;
circle:addEventListener ("collision", circle);

-- Функция "Добавление очков".
local function Addition_of_score ()

  if (wall_1.y > 400) then
    score = score + 1;
    score_text.text = score;

  if (wall_3.y > 400) then
    score = score + 1;
    score_text.text = score;

  if (wall_5.y > 400) then
    score = score + 1;
    score_text.text = score;

  if (wall_7.y > 400) then
    score = score + 1;
    score_text.text = score;
        end
      end
    end
  end
end

Runtime:addEventListener ("enterFrame", Addition_of_score);

-- Функция "Конец игры".
function End_of_the_game ()

  Runtime:removeEventListener ("enterFrame", Movement_and_generation_of_walls);
  Runtime:removeEventListener ("enterFrame", Addition_of_score);
  circle:removeEventListener ("touch", Circle_control);
  circle:removeEventListener ("collision", circle);

  -- Меню после пороигрыша.
  local menu_after_defeat = display.newRect (display.contentCenterX, 150, 300, 180);
  menu_after_defeat:setFillColor (0.35, 0.45, 0.70);
  menu_after_defeat.alpha = 0.85;

  -- Текст "Вы проиграли!"
  local text_end_of_the_game = display.newText ("Game over!", display.contentCenterX, 140, "12084.ttf", 30);
  text_end_of_the_game:setFillColor (0.50, 0.55, 0.80);

  -- Текст очков.
  local score_text = display.newText (score, display.contentCenterX, 100, "12084.ttf", 50);
  score_text:setFillColor (0.50, 0.55, 0.80);

  -- Кнопка рестарта.
  local restart_button = widget.newButton (
  {
  label = "RESTART",
  labelColor = {default = {0.35, 0.45, 0.70}, over = {0.50, 0.55, 0.80, 1}},
  font = "12084.ttf",
  onEvent = Beginning_of_the_game,
  shape = "roundedRect",
  width = 200,
  height = 40,
  cornerRadius = 15,
  fillColor = {default = {0.50, 0.55, 0.80, 1}, over = {0.35, 0.45, 0.70, 2}},
  strokeColor = {default = {0.35, 0.45, 0.70, 2},
  over = {0.50, 0.55, 0.80, 3}},
  strokeWidth = 5
  }
  )
  restart_button.x = display.contentCenterX;
  restart_button.y = 190;
end

-- Функция "Начало игры".
function Beginning_of_the_game ()

  Runtime:addEventListener ("enterFrame", Movement_and_generation_of_walls);
  Runtime:addEventListener ("enterFrame", Addition_of_score);
  circle:addEventListener ("touch", Circle_control);
  circle:addEventListener ("collision", circle);

  -- Удаление меню после рестарта игры.
  display.remove (menu_after_defeat);

  display.remove (text_end_of_the_game);

  display.remove (score_text);

  -- Очки.
  score = 0;

  -- Скорость.
  speed = 1.2;

  -- Круг.
  circle.x = display.contentCenterX;
  circle.y = 400;

  -- Стены.
  wall_1.x = 30;
  wall_1.y = 270;

  wall_2.x = 420;
  wall_2.y = 270;

  wall_3.x = 290;
  wall_3.y = 170;

  wall_4.x = -100;
  wall_4.y = 170;

  wall_5.x = 50;
  wall_5.y = 70;

  wall_6.x = 440;
  wall_6.y = 70;

  wall_7.x = 350;
  wall_7.y = -30;

  wall_8.x = -40;
  wall_8.y = -30;
end