local FONT = love.graphics.newFont("cour.ttf", 30)
love.graphics.setFont(FONT)

local LEVELS = require "levels"
local CURRENT_LEVEL = 0

local LONGEST_FRAME = 0

local GRAVITY = 100

local LVL_HEIGHT = 600
local LVL_WIDTH = 800

local PLAYER = {
	x = 0, y = 0,
	w = 40, h = 40,
	dx = 0, dy = 0,
	speed = 500,
	jump = 400,
	color = {140, 198, 63}
}

local COLOR_WHITE = {1,1,1}
local COLOR_RED = {241/255, 90/255, 36/255}
local COLOR_BG = {26/255,26/255,26/255}
local COLOR_GOAL = {41/255, 171/255, 226/255}

local GOAL = {x = 0, y = 0, w = 40, h = 40, color=COLOR_GOAL}

local BLOCKS = {}

local function add_block(x,y,w,h, d)
	if type(x) == "table" then
		table.insert(BLOCKS, x)
	elseif type(h) == "string" then
		table.insert(BLOCKS,{x=x,y=y,w=w,h=-30,text=h, color = COLOR_WHITE})
	elseif d then
		table.insert(BLOCKS,{x=x,y=y,w=w,h=h, color = COLOR_RED})
	else
		table.insert(BLOCKS,{x=x,y=y,w=w,h=h, color = COLOR_WHITE})
	end
end

local function load_level (lvl_obj)
	BLOCKS = {}

	GOAL.x = lvl_obj.goal[1]
	GOAL.y = lvl_obj.goal[2]
	GOAL.w = lvl_obj.goal[3]
	GOAL.h = lvl_obj.goal[4]
	add_block(GOAL)

	PLAYER.x = lvl_obj.player[1]
	PLAYER.y = lvl_obj.player[2]
	PLAYER.dx = lvl_obj.player[3] or 0
	PLAYER.dy = lvl_obj.player[4] or 0
	add_block(PLAYER)

	for _, block_data in ipairs(lvl_obj.blocks) do
		add_block(block_data[1],block_data[2],block_data[3],block_data[4], block_data[5])
	end
end

local function update_player_pos (player, dt)
	--if love.keyboard.isDown("w") then
	--	player.dy = player.dy - player.jump * dt
	--end
	if love.keyboard.isDown("a") or love.keyboard.isDown("left") then
		player.dx = player.dx - player.speed * dt
	end
	if love.keyboard.isDown("d") or love.keyboard.isDown("right") then
		player.dx = player.dx + player.speed * dt
	end
	player.dx = player.dx * 0.99
	player.dy = player.dy + GRAVITY * dt
	player.x = (player.x + player.dx * dt + LVL_WIDTH) % LVL_WIDTH
	player.y = (player.y + player.dy * dt + LVL_HEIGHT) % LVL_HEIGHT

	local collided = nil
	for _, block in ipairs(BLOCKS) do
		if  block ~= player and
				block.x < player.x + player.w and player.x < block.x + block.w and
				player.y < block.y + block.h and player.y + player.h > block.y then
			collided = block
			break
		end
	end

	if collided == GOAL then
		CURRENT_LEVEL = CURRENT_LEVEL + 1
		load_level(LEVELS[CURRENT_LEVEL])
	elseif collided then
		if collided.color == COLOR_RED then
			load_level(LEVELS[CURRENT_LEVEL])
			player.dy = 0
		elseif not collided.text then
			player.y = collided.y - player.h
			player.dy = 0
		end
	end
end

function love.load ()
	love.graphics.setBackgroundColor(COLOR_BG)
	CURRENT_LEVEL = 1
	load_level(LEVELS[CURRENT_LEVEL])
end

function love.update (dt)
	LONGEST_FRAME = math.max(LONGEST_FRAME, dt)
	update_player_pos(PLAYER, dt)
end

function love.draw ()
	for _, block in ipairs(BLOCKS) do
		love.graphics.setColor(block.color)
		if block.text then
			love.graphics.printf(block.text, block.x, block.y, block.w, "center")
		else
			love.graphics.rectangle("fill", block.x, block.y, block.w, block.h)
		end
	end
end