-- Подключение физики.
local physics = require "physics"
physics.start()
physics.setGravity( 0, 0 )
physics.setDrawMode"hybrid"

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

-- Загрузка круга.
local circle = display.newCircle (display.contentCenterX , 400, 25);
circle:setFillColor (0.35, 0.45, 0.80);

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

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

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

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

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

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

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

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

-- Подключение физики к кругу.
physics.addBody (circle, "dynamic", {radius = 20});
--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 = 0.8;

-- 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".
circle.collision = function (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:addEventListener ("collision", circle);

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

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

  local Text_end_of_the_game = display.newText ("Вы проиграли!", display.contentCenterX, 100, native.systemFont, 40);

end