-- InputViewer version 1.
-- Lianvee: Code ported over from source, and with some care put into (within my abilities), this cute little script will allow you to see other players' (including your own if you want!) inputs in a multiplayer game.

local InputsJoy = CV_RegisterVar{
	name = "inputs_showjoy",
	flags = CV_MODIFIED|CV_SHOWMODIF,
	PossibleValue = CV_OnOff,
	defaultvalue = "Off",
}
local InputsSelf = CV_RegisterVar{
	name = "inputs_self",
	flags = CV_MODIFIED|CV_SHOWMODIF,
	PossibleValue = CV_OnOff,
	defaultvalue = "Off",
}
local Inputs = CV_RegisterVar{
	name = "inputs",
	flags = CV_MODIFIED|CV_SHOWMODIF,
	PossibleValue = CV_OnOff,
	defaultvalue = "On",
}

local function DrawDigitalPad(v, player, x, y, flags, color)
-- Arrows! Shows input controls.
	local offs, col
	-- This is the joystick/joypad part.
	-- O backing.
	v.drawFill(x, y,    16, 16, flags|20)
	v.drawFill(x, y+16, 16,  1, flags|29)
	
	-- Arrows!
	-- <
	if (player.cmd.sidemove < 0)
		offs = 0
		col = flags|color
	else
		offs = 1
		col = flags|16
		v.drawFill(x-2, y+11,  6,  1, flags|29)
		v.drawFill(x+4, y+10,  1,  1, flags|29)
		v.drawFill(x+5,  y+9,  1,  1, flags|29)
	end
	v.drawFill(x-2, y+6-offs,  6,  6, col)
	v.drawFill(x+4, y+7-offs,  1,  4, col)
	v.drawFill(x+5, y+8-offs,  1,  2, col)
	
	-- ^
	if (player.cmd.forwardmove > 0)
		offs = 0
		col = flags|color
	else
		offs = 1
		col = flags|16
		v.drawFill(x+5,  y+4,  1,  1, flags|29)
		v.drawFill(x+6,  y+5,  1,  1, flags|29)
		v.drawFill(x+7,  y+6,  2,  1, flags|29)
		v.drawFill(x+9,  y+5,  1,  1, flags|29)
		v.drawFill(x+10, y+4,  1,  1, flags|29)
	end
	v.drawFill(x+5, (y-1)-offs,  6,  6, col)
	v.drawFill(x+6, (y+5)-offs,  4,  1, col)
	v.drawFill(x+7, (y+6)-offs,  2,  1, col)
	
	-- >
	if (player.cmd.sidemove > 0)
		offs = 0
		col = flags|color
	else
		offs = 1
		col = flags|16
		v.drawFill(x+12, y+11,  6,  1, flags|29)
		v.drawFill(x+11, y+10,  1,  1, flags|29)
		v.drawFill(x+10,  y+9,  1,  1, flags|29)
	end
	v.drawFill(x+12, (y+6)-offs,  6,  6, col)
	v.drawFill(x+11, (y+7)-offs,  1,  4, col)
	v.drawFill(x+10, (y+8)-offs,  1,  2, col)
	
	-- v
	if (player.cmd.forwardmove < 0)
		offs = 0
		col = flags|color
	else
		offs = 1
		col = flags|16
		v.drawFill(x+5, y+18,  6,  1, flags|29)
	end
	v.drawFill(x+ 5, (y+13)-offs,  6,  6, col)
	v.drawFill(x+ 6, (y+12)-offs,  4,  1, col)
	v.drawFill(x+ 7, (y+11)-offs,  2,  1, col)
end

local function DrawJoystick(v, player, x, y, flags, color)
-- Joystick render! Shows input controls.
	-- O backing.
	v.drawFill(x, y, 16, 16, flags|20)
	v.drawFill(x, y+16, 16, 1, flags|29)
	if (player.cmd.sidemove or player.cmd.forwardmove)
		-- Joystick hole.
		v.drawFill(x+5, y+5, 6, 6, flags|29)
		-- Joystick top
		v.drawFill(
			x+3 + player.cmd.sidemove/12,
			y+3 - player.cmd.forwardmove/12,
			10, 10, flags|29
		)
		v.drawFill(
			x+3+player.cmd.sidemove/9,
			y+2-player.cmd.forwardmove/9,
			10, 10, flags|color
		)
	else
		-- Just a limited, greyed out joystick top.
		v.drawFill(x+3, y+12, 10, 1, flags|29)
		v.drawFill(x+3, y+2, 10, 10, flags|16)
	end
end

local function DrawButton(v, player, x, y, flags, color, butt, symb, strngtype)
-- Buttons! Shows input controls.
-- butt parameter is the button cmd in question.
-- symb represents the button via drawn string.
	local offs, col
	if (player.cmd.buttons & butt)
		offs = 0
		col = flags|color
	else
		offs = 1
		col = flags|16
		v.drawFill(
			(x), (y+9),
			10, 1, flags|29
		)
	end
	v.drawFill(
		(x), (y)-offs,
		10, 10,	col
	)
	v.drawString(
		(x+1), (y+1)-offs,
		symb, flags, strngtype
	)
end

local function DrawViewCompass(v, player, x, y, flags, color)
-- Where we looking at, boys? Shows a line pointing to angle looking at.
	v.drawFill(
		(x), (y),
		21, 10, flags|20
	) -- Sundial backing.
	
	if (player.realmo)
		local ang = (player.powers[pw_carry] == CR_NIGHTSMODE) and (FixedAngle((player.flyangle-90)<<FRACBITS))
		or (player.cmd.angleturn<<16 - R_PointToAngle(player.realmo.x, player.realmo.y))
		local xcomp = P_ReturnThrustX(nil, ang + ANGLE_90, 8)
		local ycomp = P_ReturnThrustY(nil, ang + ANGLE_90, 8)
		
		for i = 0,6
			v.drawFill(
				(x+10)+(xcomp * i/8), (y+4)-(ycomp/2 * i/8),
				1, 1, flags|16
			) -- Line helper.
		end
		v.drawFill(
			(x+9)+xcomp, (y+3)-(ycomp/2),
			3, 3, flags|color
		) -- Point (front).
	end
end

local function InputViewer(v, player, cam)
-- Draw record attack's input viewer. This should be available outside of that mode, in all honesty.
	if (Inputs.value) then
		if (InputsSelf.value) and (player == consoleplayer)
		or (player ~= consoleplayer)
		then
			local x, y = 16, 156
			local flags = V_HUDTRANS|V_PERPLAYER|V_SNAPTOBOTTOM|V_SNAPTOLEFT
			local color = (player.skincolor and skincolors[player.skincolor].ramp[4] or 0)
			if (player.spectator) then color = (player.skincolor and skincolors[player.skincolor].ramp[8] or 0) end
			
			-- Here are the movement inputs.
			if (InputsJoy.value)
				DrawJoystick(v, player, x, y, flags, color)
			else
				DrawDigitalPad(v, player, x, y, flags, color)
			end
			
			-- Here are the button inputs.
			DrawButton(v, player, x+20, y-2, flags, color, BT_JUMP, 'J', 'left')
			DrawButton(v, player, x+31, y-2, flags, color, BT_SPIN, 'S', 'left')
			
			-- Here is the angle-looking part. I freaking hate how easy it is for C to break in Lua without proper knowledge.
			DrawViewCompass(v, player, x+20, y+9, flags, color)
		end
	end
end
hud.add(InputViewer, "game")