-- Namespace.
local Game = {}

-- Import.
Game.newRoom = require "room"
Game.newPlayer = require "player"
Game.newProp = require "prop"
Game.newMessage = require "message"
Game.quads = require "quads"

-- Various children.
Game.sprites = {}
Game.rooms = {}
Game.props = {}
Game.player = nil
Game.message = nil
Game.delay = 0.08
Game.initial = Game.delay

-- Aliases for window size getters.
Game.getWidth = love.graphics.getWidth
Game.getHeight = love.graphics.getHeight

-- Loads sprites atlases.
function Game.load()
	-- Font
	Game.font = love.graphics.newImageFont("assets/font.png", " 0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.,:;-_/\\!@#$%^&*?=+~`|'\"()[]{}<>", 1)
	Game.font:setLineHeight(0.875)
	love.graphics.setFont(Game.font)
	-- Spritesheets
	Game.sprites.player = love.graphics.newImage("assets/player.png")
	Game.sprites.room = love.graphics.newImage("assets/rooms.png")
	Game.sprites.door = love.graphics.newImage("assets/door.png")
	Game.sprites.console = love.graphics.newImage("assets/console.png")
	Game.sprites.fridge = love.graphics.newImage("assets/fridge.png")
	Game.sprites.outside = love.graphics.newImage("assets/outside.png")
	Game.sprites.wand = love.graphics.newImage("assets/wand.png")
	-- Create new player
	Game.player = Game.newPlayer()
end

-- Based on current window sizes returns proper scale for elements.
function Game.getScale()
	local w,h = Game.getWidth(), Game.getHeight()
	local scale_w = math.ceil(w / 100)
	local scale_h = math.ceil(h / 75)
	return math.max(scale_w, scale_h)
end

-- Get current offsets.
function Game.getOffsets()
	local scale, width, height, mouse_x, mouse_y, player_x, offset_x, offset_y
	scale = Game.getScale()
	width, height = Game.getWidth(), Game.getHeight()
	mouse_x, mouse_y = love.mouse.getPosition()
	player_x = Game.player.x * scale
	mouse_x = (mouse_x - width / 2)*.02
	mouse_y = (mouse_y - height / 2)*.01
	offset_x = width/2 - player_x - mouse_x
	offset_y = (height - (32 * scale))/2 - mouse_y
	return offset_x, offset_y
end

-- Returns mouse position in game world.
function Game.getMousePosition(x, y)
	local scale = Game.getScale()
	if not x and not y then 
		local x, y = love.mouse.getPosition()
	end
	local ox, oy = Game.getOffsets()
	x = math.floor((x - ox)/scale)
	y = math.floor((y - oy)/scale)
	return x, y
end

-- Returns double true if given position is inside any Room.
function Game.inRange(x, y)
	local horizontal, vertical = false, false
	if y > 0 and y < 32 then
		vertical = true
	end
	local width = 0
	for _,room in pairs(Game.rooms) do
		if room.discovered then
			width = width + room:getDimensions()
		end
	end
	if x > 2 and x < width-1 then
		horizontal = true
	end
	return horizontal, vertical
end

-- Tests if given position is inside any Prop.
function Game.testPosition(x, y)
	for _,prop in pairs(Game.props) do
		local test = prop:testPosition(x, y)
		if test then
			return test
		end
	end
end

-- Returns player. The only one.
function Game.getPlayer()
	return Game.player
end

-- Returns current message, beep.
function Game.getMessage()
	return Game.message
end

-- Inserts new Room.
function Game.insertRoom(width, height)
	local x, y
	local last = Game.rooms[#Game.rooms]
	if last then
		local lw, lh = last:getDimensions()
		local lx, ly = last:getPosition()
		x, y = lx + lw, ly
	end
	local room = Game.newRoom():setDimensions(width, height):setPosition(x, y)
	table.insert(Game.rooms, room)
	return room
end
function Game.insertDoor(room)
	local x, y = room:getPosition()
	local w, h = room:getDimensions()
	local door = Game.insertProp():setPosition(x+w-5,10):setDimensions(10,18)
	return door
end

-- Inserts new Prop.
function Game.insertProp(prop)
	local prop = prop
	if not prop then
		prop = Game.newProp()
	end
	table.insert(Game.props, prop)
	return prop
end

-- Sets given or empty message as current message.
function Game.setMessage(message)
	local message = message
	if not message then
		message = Game.newMessage()
	end
	Game.message = message
	return message
end

return Game