-- 
-- Abstract: CollisionDetection sample project
-- Demonstrates global and local collision listeners, along with collision forces
-- 
-- Version: 1.2 (revised for Alpha 3, demonstrates "collision" event and new "preCollision" and "postCollision" events)
-- 
-- Sample code is MIT licensed, see http://developer.anscamobile.com/code/license
-- Copyright (C) 2010 ANSCA Inc. All Rights Reserved.

local physics = require( "physics" )
physics.start()

--Set gravity to 0 since this is a top-down game
physics.setGravity(0,0)

local sky = display.newImage( "bkg_clouds.png" )
sky.x = display.contentWidth / 2
sky.y = 195

local ground = display.newImage( "ground.png" )
ground.x = display.contentWidth / 2
ground.y = 445
ground.myName = "ground"

--construct player character, for now an egg

local eggCollisionFilter = { categoryBits = 3, maskBits = 1 }
local eggBody = { density=1.0, friction=0.1, bounce=0.5, radius=25, filter = eggCollisionFilter }
local egg = display.newImage( "egg.png" )
egg.x = display.contentWidth / 2
egg.y = 200
egg.myName = "Egg buddy"
physics.addBody(egg, eggBody)



--physics.addBody( ground, "static", { friction=0.5, bounce=0.3 } )


local coconuts = {}
local waves = 0

local function spawnProjectile(posx, posy, velx, vely) 
	
	local coconutCollisionFilter = { categoryBits = 1, maskBits = 2 }
	local coconutBody = { density=3.0, friction=0, bounce=1.0, filter=coconutCollisionFilter}
	local coconut = display.newImage( "coconut.png" )
	coconut.x = posx; coconut.y = posy;
	physics.addBody( coconut, coconutBody)
	coconut:applyLinearImpulse( velx * (egg.x - coconut.x) , vely * (egg.y - coconut.y), coconut.x, coconut.y )
	
	coconuts[#coconuts + 1] = coconut	
	
end 
local function projectileManager()
	local leftright = 1
	
	--Fillers:
	local a = .1
	spawnProjectile(320, 380, a ,a)
	--Waves:
	--if(#coconuts % 10 == 0) then
	--local i = 0
	--local waveSize = 10
	
	--	while(i < 10) do
	--	leftright = math.random(0, 1) * 2 - 1
	--	local randomY = math.random(400)
	--	spawnProjectile(300 * leftright, randomY, egg.x, egg.y)
	
	--	i = i + 1
	--	end
	--end
end

--Defined outside of function to represent last touch location
local lastTouchX = 0
local lastTouchY = 0

local function moveCharacter(event)
print("Eggx:", egg.x, " Eggy:", egg.y)
local targetPositionX = display.contentWidth / 2
local targetPositionY = 200
local moveAcceleration = 10
local moveAccelerationX = 0
local moveAccelerationY = 0
local deltaX = targetPositionX - egg.x
local deltaY = targetPositionY - egg.y
	if (math.abs(deltaX) > math.abs(deltaY)) then
		if(deltaX < 0) then
		moveAccelerationX = moveAcceleration * -1
		else
		moveAccelerationX = moveAcceleration
		end
	elseif
	    (math.abs(deltaX) < math.abs(deltaY)) then
		if(deltaY < 0) then
		moveAccelerationY = moveAcceleration * -1
		else
		moveAccelerationY = moveAcceleration
		end
	end
	egg:applyForce(moveAccelerationX, moveAccelerationY, egg.x, egg.y)	
end



local function onLocalCollision( self, event )
       
	--egg.isBodyActive = false
	print("GAME OVER")
		
end

timer.performWithDelay( 1000, projectileManager, 1400 )
egg.collision = onLocalCollision
egg:addEventListener( "collision", egg )
sky:addEventListener( "touch", moveCharacter )