g3d = require "g3d"



function love.load()
	-- GRAPHICS
		-- GOOD PIXEL
	love.graphics.setDefaultFilter("nearest")
		-- FONTS
	DefaultFont = love.graphics.newImageFont("default_font.png",
   " abcdefghijklmnopqrstuvwxyz" ..
   "ABCDEFGHIJKLMNOPQRSTUVWXYZ0" ..
	 "123456789.,!?-+/():;%&`'*#=[]\"")
	love.graphics.setFont(DefaultFont)
	

	--fps_count
	fps_count = 0
	fps_second = 0
	fps_draw = 0
	fps_total = 0
	
	-- camera
	g3d.camera.pivot = { 0, 0, 0 }
	g3d.camera.position = { 0, 0, 0 }
	g3d.camera.pitch = 0
	g3d.camera.zoom = 10
	speed = 0
	
	-- enums
	require "enums"
	
	--objects
	require "objects"
	
	-- levels
	require "levels"
	current_level = levels.main_menu

end

function love.update(dt)

	-- count frames per seconds
	if fps_second >= 1 then 
		fps_second = fps_second - 1
		fps_draw = fps_count 
		fps_count = 0 
		fps_total = fps_total + 1
	end
	fps_second = fps_second + dt
	fps_dt = dt   
	fps_count = fps_count + 1
	
	-- camera: slow, fast, medium?
	if love.keyboard.isDown("lshift") then 
		speed = 2 
	elseif love.keyboard.isDown("lctrl") then
		speed = 6
	else
		 speed = 4
	end 
	
	if not game_pause then
		g3d.camera.strategyViewMovement(dt,speed,is_scrolling)
		-- movement: w,a,s,d, 
		-- rotate: q,e
		-- move by screen: 20 px: sides, forward, backwards
		-- mouse scroll: zoom
	end
	
	-- select troops
	if love.mouse.isDown(1) == true then
		if selecting_troops == false then 
			sel_pos_x = love.mouse.getX()
			sel_pos_y = love.mouse.getY()
		end
		selecting_troops = true
	else
		selecting_troops = false
	end
end

function love.wheelmoved(_, y)
	g3d.camera.zoom = math.min(math.max(3,g3d.camera.zoom-y/1.5),30)
	is_scrolling = true
end

function love.keypressed(key)
	-- pause the game and free the mouse
	if key == "escape" then 
		if game_pause then
			game_pause = false
		else
			game_pause = true
		end
	end
	
end
 
function love.draw()
	-- get drawing globals
	game_width = love.graphics.getWidth()
	game_height = love.graphics.getHeight()

	-- draw every model
	local ent_count = 0
	for _, entity in pairs(current_level.entities) do
		ent_count = ent_count + 1
		if entity.model ~= nil then
		
			-- do animated models
			if entity.is_animated == true and entity.anim_path ~= nil and game_pause ~= true then
				-- try to animate
				entity.anim_subframe = entity.anim_subframe + 1
				if entity.anim_subframe >= entity.anim_speed then
					entity.anim_frame = entity.anim_frame + 1
					entity.anim_subframe = entity.anim_subframe - entity.anim_speed
				end
				-- cycle
				if entity.anim_frame >= entity.anim_frames+1 then entity.anim_frame = entity.anim_frame - entity.anim_frames end
				-- change
				entity.model.mesh:setTexture(entity.anim_imgs[entity.anim_frame])
			end
			
			-- do rotating models
			if entity.rotate_mode ~= nil and entity.rotate_mode ~= "none" and game_pause ~= true then
				local rm = entity.rotate_mode
					
				if rm == "cam_xz" then
				
					local sin = g3d.camera.position[1]-entity.model.translation[1]
					local cos = g3d.camera.position[3]-entity.model.translation[3]
					
					local angle = math.atan2(sin,cos)-math.rad(180)
					
					entity.model:setRotation(0,angle,0)
				end
			end
			
			entity.model:draw()
		else		
			entity:draw()
		end
	end
	
	-- draw selection
	if selecting_troops == true then
		love.graphics.rectangle("line",sel_pos_x,sel_pos_y, love.mouse.getX() - sel_pos_x, love.mouse.getY() - sel_pos_y)	
	else
	
	end
	-- print coords
	if game_pause then
		draw_pause_menu(30,30)
	else
		love.graphics.print("time: "..fps_total..", fps: "..fps_draw..", frametime: "..fps_dt..", x: "..math.floor(g3d.camera.position[1])..", y: "..math.floor(g3d.camera.position[2])..", z: "..math.floor(g3d.camera.position[3]), x, y)
	end
	
	for _, entity in pairs(current_level.entities) do
		if entity.model ~= nil then
			if entity.is_animated then
				love.graphics.print("["..entity.name.."] frame: "..entity.anim_frame.."/"..entity.anim_frames..", rm: \""..entity.rotate_mode.."\"",20,20)
				love.graphics.print("["..entity.name.."] animation: "..entity.anim_path,20,40)
			end
		end
	end
end

function draw_pause_menu(x,y)
		love.graphics.setColor(1,1,1,0.3)
			love.graphics.rectangle("fill", x, y, game_width-2*x, game_height-2*y)
		love.graphics.setColor(1,1,1,1)
end