GameState.lua

local class             = require 'middleclass/middleclass'
local Factory           = require 'Factory'
local GameObject        = require 'GameObject'
local ResMgr            = require 'ResourceManager'
local ObjectManager     = require 'ObjectManager'
local CameraManager     = require 'CameraManager'
local DebugManager      = require 'DebugManager'

local GameState = class('GameState')


-- User Controllers
local AltGamePadController    = require 'components/AltGamePadController'
local GamePadController       = require 'components/GamePadController'
local KeyboardController      = require 'components/KeyboardController'
local AltKeyboardController   = require 'components/AltKeyboardController'

-- AI
local VokronAI          = require 'AI/michael/VokronAI'
local Chaser             = require 'AI/basic/Chaser'
local AIStarter         = require 'AI/AIstarter/AIStarter'



function GameState:initialize()
	self.hello = "yo gabba gabba"

	self.resmgr    = ResMgr:new(self)
	self.objmgr    = ObjectManager:new(self)
	self.factory   = Factory:new(self)
	self.cammgr    = CameraManager:new(self)
	self.dbgmgr    = DebugManager:new(self) 

	self.world = love.physics.newWorld(0,0,true)
	self.world:setCallbacks(beginContact,endContact,preSolve,postSolve)
	self:loadImages()
	self:startGame()
end

function GameState:startGame()
	self.objmgr:clear()
	--self:addPlayer(AltGamePadController)
	self:addPlayer(AltKeyboardController)
	--self:addPlayer(AIStarter)
	self.factory:createPlanet(0,0,math.pi/2,200, "testplanet")
	--self.factory:createPlanet(0,786,math.pi/2,200, "testplanet3")
	--self.factory:createPlanet(0,786*2,math.pi/2,200, "testplanet5")
	--self.factory:createPlanet(1366,0,math.pi/2,200, "testplanet2")
	--self.factory:createPlanet(1366,786,math.pi/2,200, "testplanet4")
	--self.factory:createPlanet(1500,0,0,200)
end

function GameState:loadImages()
	self.resmgr:loadImg('img/asteroids/asteroid3.png',"asteroid3")
	self.resmgr:loadImg('img/asteroids/asteroid2.png',"asteroid2")
	self.resmgr:loadImg('img/asteroids/asteroid1.png',"asteroid1")
	self.resmgr:loadImg('img/ship2.png',"spaceship")
	self.resmgr:loadImg('img/player.png',"booger")
	self.resmgr:loadImg('img/shot.png',"fire")
	self.resmgr:loadImg('img/saft.png',"saft")
	self.resmgr:loadImg('img/fighter.png',"fighter")
	self.resmgr:loadImg('img/bg.png',"bg")
	self.resmgr:loadImg('img/floatbg1.png',"floatbg1")
	self.resmgr:loadImg('img/floatbg2.png',"floatbg2")
	self.resmgr:loadImg('img/floatbg3.png',"floatbg3")
	self.resmgr:loadImg('img/hit.png','hit')
	self.resmgr:loadImg('img/explosion.png','explosion')
	self.resmgr:loadImg('img/crosshair.png','cross')
	self.resmgr:loadImg('img/square.png','square')
	self.resmgr:loadImg('img/planet/test.png','ptest')
	self.resmgr:loadImg('img/planet/grav.png','grav')
	self.resmgr:loadImg('img/planet/grav2.png','grav2')
	self.resmgr:loadImg('img/planet/planet.png','ptest2')
	self.resmgr:loadImg('img/planet/planet2.png','ptest3')
	self.resmgr:loadImg('img/planet/shadow.png','pshadow')
	self.resmgr:loadImg('img/planet/testplanet1.png','testplanet')
	self.resmgr:loadImg('img/planet/testplanet2.png','testplanet2')
	self.resmgr:loadImg('img/planet/testplanet3.png','testplanet3')
	self.resmgr:loadImg('img/planet/testplanet4.png','testplanet4')
	self.resmgr:loadImg('img/planet/testplanet5.png','testplanet5')
end

function GameState:update(dt)
	self.dbgmgr:update(dt)
	self.world:update(dt)

	-- update
	self.objmgr:updateAll()

	local cpos = nil
	if self.objmgr.players[1] ~= nil then
		cpos = self.objmgr.players[1].trans
	else
		cpos = {} 
		cpos.x = 0
		cpos.y = 0
	end
	self.cammgr:update(cpos.x,cpos.y)
end

function GameState:draw()
	love.graphics.setBackgroundColor(34,34,38)
	self.cammgr:attach()
	local bgpos = nil
	if self.objmgr.players[1] ~= nil then
		bgpos = self.objmgr.players[1].trans
	else
		bgpos = {}
		bgpos.x = 0
		bgpos.y = 0
	end
	--self.cammgr.cam:rotateTo(-bgpos.r-math.pi/2)
	self:drawBackground(bgpos.x,bgpos.y)

	self.objmgr:drawAll()
	self.cammgr:detach()
end

-- collision callbacks
function GameState:beginContact(a,b,coll)
	self.objmgr:beginContact(a,b,coll)
end

function GameState:endContact(a,b,coll)
	self.objmgr:endContact(a,b,coll)
end

function GameState:preSolve(a,b,coll)
	self.objmgr:preSolve(a,b,coll)
end

function GameState:postSolve(a, b, coll, normalimpulse1, tangentimpulse1, normalimpulse2, tangentimpulse2)
	self.objmgr:postSolve(a, b, coll, normalimpulse1, tangentimpulse1, normalimpulse2, tangentimpulse2)

end

function GameState:drawBackgroundLayer(x,y,img,distance)
	local wh,hh = img:getWidth(),img:getHeight()
	local w,h = wh*2,hh*2
	local x1,y1 = math.floor(x/w), math.floor(y/h)
	local dx,dy = (x/distance) % w,(y/distance) % h   
	local offx,offy = (x % w)-dx,(y % h)-dy
	local Xc,Yc = (x1*w)+offx, (y1*h)+offy
	local X1,X2 = Xc - wh, Xc + wh
	local Y1,Y2 = Yc - hh, Yc + hh
	love.graphics.draw(img,X1,Y1,0,2,2)
	love.graphics.draw(img,X2,Y1,0,2,2)
	love.graphics.draw(img,X1,Y2,0,2,2)
	love.graphics.draw(img,X2,Y2,0,2,2)
end

function GameState:drawBackground(x,y)
	--self:drawBackgroundLayer(x,y,self.resmgr:getImg('square'),6)
	self:drawBackgroundLayer(x,y,self.resmgr:getImg('bg'),5)
	self:drawBackgroundLayer(x,y,self.resmgr:getImg('floatbg2'),3.5)
	self:drawBackgroundLayer(x,y,self.resmgr:getImg('floatbg1'),2.5)
	self:drawBackgroundLayer(x,y,self.resmgr:getImg('floatbg3'),1)
end

function GameState:addPlayer(controller)
	local w,h = love.graphics.getDimensions()
	self.factory:createPlayer(w/2,h/2,0,controller)
end

function GameState:addAstroids(n)
	for i = 1, n do
		local x,y,r,level,size
		local w, h = love.graphics.getDimensions()
		x = math.random()*w
		y = math.random()*h
		r = math.random()*2*math.pi
		size = 100
		level = 3
		self.factory:createAstroid(x,y,r,size,1,level)
	end
end

return GameState