poke(0x5F2D, 1)

--
-- constants
--

local BLUE = 1
local YELLOW = 2

-- 🅾️ Z[C]N ❎ [X]VM
-- X and C have the same position on QWERTY and AZERTY
local LEFT,RIGHT,UP,DOWN,BTN_O,BTN_X = 0,1,2,3,4,5

--
-- Utils
--

function idx_xy(idx, width)
	return (idx - 1) % width + 1, (idx - 1) \ width + 1
end

function xy_idx(x, y, width)
	return ((y - 1) * width) + x
end

function map(tbl, f)
	local t = {}
	for k, v in pairs(tbl) do
		t[k] = f(v)
	end
	return t
end

function filter(tbl, f, keepindex)
	local ret = {}
	for k, v in pairs(tbl) do
		if f(v) then
			if keepindex
				then ret[k] = v
				else add(ret, v)
			end
		end
	end
	return ret
end

function slice(tbl, first, last, step)
	local sliced = {}
	for i = (first or 1), (last or #tbl), (step or 1) do
		sliced[#sliced + 1] = tbl[i]
	end
	return sliced
end

local _rectfill = rectfill
function rectfill(x, y, w, h, col)
	_rectfill(x, y, x+w, y+h, col)
end

--
-- Overrides count() to accept a callback
--
-- local _count = count
-- function count(tbl, p)
-- 	if type(p) != "function" then return _count(tbl, p) end
-- 	local c = 0
-- 	for v in all(tbl) do
-- 		if p(v) then c+=1 end
-- 	end
-- 	return c
-- end

--
-- Returns the indices of found occurences of `o` within `tbl`
--
function find(tbl, o)
	local indices = {}
	for k,v in ipairs(tbl) do
		if v == o then add(indices, k) end
	end
	return indices
end

--
-- Makes a shallow table copy
--
function copy(tbl)
	return map(tbl, function (o) return o end)
end

--
-- Table equality - shallow comparison
--
function equal(tbl1, tbl2)
	for k, _ in ipairs(tbl1) do
		if tbl1[k] ~= tbl2[k] then return false end
	end
	return true
end

-- function tostring(any)
--   if (type(any)~="table") return tostr(any)
--   local str = "{"
--   for k,v in pairs(any) do
--     if (str~="{") str=str..","
--     str=str..tostring(k).."="..tostring(v)
--   end
--   return str.."}"
-- end

function makeButton(x, y, w, h, text, onClick, onHover)
	local state = 0 -- 0 = normal, 1 = hovered, 2 = pressed
	return {
		x = x,
		y = y,
		w = w,
		h = h,
		text = text,
		onClick = onClick,
		onHover = onHover,

		draw=function(self, selected)
			-- rectfill(self.x, self.y, self.w, self.h, 8)
			local color = selected and 7 or 5
			print(self.text, self.x+1, self.y+1, color)
		end,

		update=function(self)
			if mouse_x >= self.x and mouse_x <= self.x + self.w and
				mouse_y >= self.y and mouse_y <= self.y + self.h then
				if stat(34)&1 == 0 and state == 2 and self.onClick then
					self.onClick()
				end
				if stat(34)&1 == 1 then
					state = 2
				else
					if onHover then onHover() end
					state = 1
				end
			else
				state = 0
			end
		end
	}
end

function setState(state, ...)
	local args = {...}
	if gs and gs._leave then gs._leave() end
	gs = state
	if gs and gs._enter then gs._enter(unpack(args)) end
end

--
-- main loop
--

local create = true

function _init()
	cls()
	printh(" ")
	printh(" ")
	mouse_x = 0
	mouse_y = 0

	states = {
		rules = stateRules(),
		menu = stateMenu(),
		game = stateGame()
	}

	setState(states.rules)

end

function _update60()
	gs._update()
	-- if not create then
	-- 	board:solveStep()
	-- end

	-- mouse
	mouse_x = stat(32)
	mouse_y = stat(33)
end

function _draw()
	cls()
	gs._draw()
	spr(1, stat(32), stat(33))
end