-- Setup the game
-- Turn off the status bar
display.setStatusBar(display.HiddenStatusBar);
 
-- Setup graphics
local physics = require("physics");
physics.start();
physics.setDrawMode("hybrid");
physics.setGravity(0, 9.8);
physics.setPositionIterations(16);
physics.setVelocityIterations(6);
 
-- Setup the background group
local gameGroup = display.newGroup();
gameGroup.x = 0;
 
-- Ground object
local ground = display.newRect(450, 0, 320, 5);
ground.x = 160;
ground.y = 440;
ground.objectType = "ground"
groundPhysics = { -160, 0, 160, 0, 160, 10, -160, 10 };
physics.addBody(ground, "static", { density=1.0, friction=0.0, bounce=0.0, shape=groundPhysics });
gameGroup:insert(ground);
 
-- Setup a sprite for the player
playerInstance = display.newRect(100, 400, 32, 32);
playerInstance.x = 100;
playerInstance.y = 400;
playerInstance.rotation = 0;
gameGroup:insert(playerInstance);
physics.addBody(playerInstance, "dynamic", { density=0.25, friction=0.15, bounce=0.0 });
playerInstance.isFixedRotation = true;
playerInstance.objectType = "player";
 
-- Setup some vars on the playerInstance
playerInstance.isFalling = false;
playerInstance.xVel = 0;
playerInstance.yVel = 0;
 
-- Test jump platform
local jumpPlatform = display.newRect(80, 200, 100, 50);
jumpPlatform.objectType = "jumpPlatform"
gameGroup:insert(jumpPlatform);
physics.addBody(jumpPlatform, "static", { friction=0.3, isSensor=true} );
 
 
-- The main loop
function onEnterFrame(event) 
        
        -- Move the game world to keep the player onscreen
        if playerInstance.y <= 200 then
                gameGroup.y = -playerInstance.y + 200;
        end     
end
 
-- When the player makes a tap event
function onTouch(event)
 
        local t = event.target;
        local phase = event.phase;
 
        if phase == "began" then
                -- Make the object the topmost object
                local parent = t.parent;
                parent:insert(t);
                display:getCurrentStage():setFocus(t);
                
                -- Prevents spurious messages being sent
                t.isFocus = true;
                
                -- Store the initial position
                t.x0 = event.x - t.x;
                t.y0 = event.y - t.y;
                
        elseif t.isFocus == true then
        
                if phase == "moved" then
                
                elseif phase == "ended" or phase == "cancelled" then
                        
                        local xForce = (-1 * (event.x - playerInstance.x)) * 2.75;
                        local yForce = (-1 * (event.y - playerInstance.y)) * 2.75;
                
                        playerInstance:applyForce( 0, yForce, playerInstance.x, playerInstance.y);
                                        
                        display.getCurrentStage():setFocus(nil);
                        t.isFocus = false;
                        
                end
                
        end
        
end
 
local function onCollision(self, event)
 
        local other = event.other.objectType;
 
        xVel, yVel = playerInstance:getLinearVelocity();
        
        --debugTextField1.text = "collision between: " .. self.objectType .. " and " .. other;
                
        if event.phase == "began" then
                
                if (yVel > 0) then
                        event.other.isSensor = false;
                end
                
        elseif event.phase == "ended" then
                event.other.isSensor = true;
        end
        
end
 
-- Setup the event listeners
playerInstance.collision = onCollision;
playerInstance:addEventListener("collision", playerInstance);
Runtime:addEventListener("enterFrame", onEnterFrame);
playerInstance:addEventListener("touch", onTouch);