globalAudio = globalAudio or nil

if (globalAudio) then
    globalAudio:Stop()
end

sound.PlayURL("http://localhost/test/file.mp3", "", function(audio, __, err)
    globalAudio = audio
    audio:Play()

    timer.Create("fft", 0.01, 0, function()
        fftAnal(audio)
    end)
end)

local lastFFT = {}
local maxs = {}

local kickThreshold = 0.3;

function maxAmps(freqs)
    local max = 0

    for i=freqs[1], freqs[2] do
        if (lastFFT[i] and max and lastFFT[i] > max) then
            max = lastFFT[i]
        end
    end

    return max
end

function fftAnal(audio)
    audio:FFT(lastFFT, FFT_256)
    for k, v in pairs(lastFFT) do
        if (!maxs[k] or v > maxs[k]) then
            maxs[k] = v
        end
    end

    if (maxAmps({1, 11}) >= kickThreshold) then
        kickThreshold = maxAmps({1, 11})
        kick(maxAmps({1, 11}))
    else
        kickThreshold = kickThreshold - 0.02
    end
end

local colors = {}

local baseColor = Color(0, 146, 185, 200)

for i=1, 128 do
    colors[i] = Color(baseColor.r + math.random(0, 10), baseColor.g + math.random(-10, 10), baseColor.b + math.random(-10, 10))
end

local paintValues = {}
local drawColor = Color(255, 255, 255, 0)

hook.Add("HUDPaint", "test", function()
    local w = ScrW() / 128

    surface.SetDrawColor(drawColor)
    surface.DrawRect(0, 0, ScrW(), ScrH())

    for k, v in pairs(lastFFT) do
        if (!paintValues[k]) then
            paintValues[k] = (200 / maxs[k]) * v
        else
            if (paintValues[k] < (200 / maxs[k]) * v) then
                paintValues[k] = math.Approach(paintValues[k], (200 / maxs[k]) * v, FrameTime() * 3000)
            else
                paintValues[k] = math.Approach(paintValues[k], (200 / maxs[k]) * v, -FrameTime() * 3000)
            end
        end

        //surface.SetDrawColor(0, 255/128 * k, 255 - (255/128 * k ))
        surface.SetDrawColor(colors[k])
        surface.DrawRect((k - 1) * w, 0, w, paintValues[k])
    end
end)


function kick(mag)
    drawColor = Color(math.random(0, 255), math.random(0, 255), math.random(0, 255), 100)
    local ang = AngleRand() * mag
    LocalPlayer():ViewPunch(ang)
end