require "sprites"

LAYER_FOREGROUND = 1
LAYER_BACKGROUND = 2
LAYER_ITEMS = 4
LAYER_SPRITES = 8
LAYER_SHADOWS = 16
LAYER_ALL = 31

rooms = {
	surf_background = nil,
	surf_foreground = nil,
	surf_items = nil,
	surf_original_items = nil,
	visibility = LAYER_ALL,
	pos = {x=0, y=4*12},

	current = function()
		return (rooms.pos.x//20) + (rooms.pos.y//12) * 8
	end,

	init = function()
		rooms.pos.x, rooms.pos.y = 0,4*12
		if rooms.surf_background ~= nil then surf.free(rooms.surf_background) end
		rooms.surf_background = surf.load("rooms_background.bin")
		--rooms.surf_background = surf.new(20*8,12*8)

		if rooms.surf_foreground ~= nil then surf.free(rooms.surf_foreground) end
		rooms.surf_foreground = surf.load("rooms_foreground.bin")
		--rooms.surf_foreground = surf.new(20*8,12*8)

		if rooms.surf_items ~= nil then surf.free(rooms.surf_items) end
		rooms.surf_items = surf.load("rooms_items.bin")
		--rooms.surf_items = surf.new(20*8,12*8)
		
		rooms.surf_original_items = surf.new(20*8,12*8)
		surf.source(rooms.surf_items)
		surf.target(rooms.surf_original_items)
		draw.surf(0,0,160,96,0,0)

		sprites.init()
		
		--map.surf(rooms.surf_background)
		--for y=0,12*8 do
		--	for x=0,20*8 do
		--		map.tile(x,y,38)
		--	end
		--end
		--map.surf(rooms.surf_foreground)
	    --map.tile(10,10,16)

		--surf.save(rooms.surf_background, "data/rooms_background.bin")
		--surf.save(rooms.surf_foreground, "data/rooms_foreground.bin")
		--surf.save(rooms.surf_items, "data/rooms_items.bin")
	end,

	save = function()
		surf.save(rooms.surf_background, "data/rooms_background.bin")
		surf.save(rooms.surf_foreground, "data/rooms_foreground.bin")
		surf.save(rooms.surf_items, "data/rooms_items.bin")
		editor.modified = false
	end,

	is_outside = function(x, y)
		return x < rooms.pos.x or y < rooms.pos.y or x > rooms.pos.x + 20 or y > rooms.pos.y + 12
	end,

	draw = function()
		-- Retallem la pantalla a la zona de joc
	    view.clip(0,8,160,96)

		-- Movem la càmara a l'habitació on estem
    	view.origin(-rooms.pos.x*8,-rooms.pos.y*8+8)

		-- Pintem el background
		surf.source(surf_tiles)
		map.surf(rooms.surf_background)
	    if rooms.is_visible(LAYER_BACKGROUND) then
			map.draw()
		else
			draw.rectf(0,0,160,96,1)
		end

		-- Movem 4x4 pixels la càmara per a pintar les sombres dels sprites i el foreground
    	view.origin(-rooms.pos.x*8+4,-rooms.pos.y*8+12)

		-- Pintem el foreground de negre
		map.surf(rooms.surf_foreground)
		pal.subpal(0,32,1)
	    if rooms.is_visible(LAYER_FOREGROUND | LAYER_SHADOWS) then map.draw() end

		-- Pintem els sprites de negre
		if rooms.is_visible(LAYER_SPRITES | LAYER_SHADOWS) then 
			sprites.draw(true)
			--draw.surf(0, 0, 16, 17, 20, 15, 16, 17)
		end

		-- Movem la càmara al lloc que toca de nou, i tornem la paleta normal
    	view.origin(-rooms.pos.x*8,-rooms.pos.y*8+8)
		pal.subpal()

		-- Pintem el foreground
	    surf.source(surf_tiles)
		map.surf(rooms.surf_foreground)
	    if rooms.is_visible(LAYER_FOREGROUND) then map.draw() end

		-- Pintem els sprites
		if rooms.is_visible(LAYER_SPRITES) then 
			sprites.draw()
	    	--draw.surf(0, 0, 16, 17, 20, 15, 16, 17)
		end

		-- Pintem la rejilla
		--for y=0,12 do draw.line(0,y*8, 160, y*8, 27) end
		--for x=0,20 do draw.line(x*8, 0, x*8, 104, 27) end
	end,

	is_visible = function(layer)
		return rooms.visibility	& layer == layer
	end,

	set_visibility = function(layer, visibility)
		if visibility then
			rooms.visibility = rooms.visibility | layer
		else
			rooms.visibility = rooms.visibility & ~layer
		end
	end,

	toggle_visibility = function(layer)
		if rooms.visibility & layer == layer then
			rooms.visibility = rooms.visibility & ~layer
		else
			rooms.visibility = rooms.visibility | layer
		end
	end,

	peiv = function()
		pal.color(1, 1, 1, 1)
		return "HOLA OTHER UNIT"
	end
}