-- name: Slippery Brother
-- description: Slippery Brother v1.0\nBy \\#417B16\\Blither\\#7B1619\\Dev\n\n\\#dcdcdc\\Edits the player's physics to be ice-like! "Isn't it a bit cold in here or is it just me?"

local playerPhysics = {}

if gGlobalSyncTable.slipperyAmount == nil then
    gGlobalSyncTable.slipperyAmount = 3
end

hook_event(HOOK_MARIO_UPDATE, function(m)
    if m == nil or m.marioObj == nil then return end
    
    local i = m.playerIndex
    if playerPhysics[i] == nil then
        playerPhysics[i] = { x = m.vel.x, z = m.vel.z }
    end
    
    local state = playerPhysics[i]
    
    if (m.action & 0x00000200) == 0 then
        local targetX = sins(m.intendedYaw) * (m.intendedMag * 2.5)
        local targetZ = coss(m.intendedYaw) * (m.intendedMag * 2.5)
        
        local amt = gGlobalSyncTable.slipperyAmount or 3
        if amt <= 0 then amt = 0.001 end
        local targetWeight = 0.012 / amt
        if targetWeight > 1 then targetWeight = 1 end
        local historyWeight = 1 - targetWeight
        
        state.x = (state.x * historyWeight) + (targetX * targetWeight)
        state.z = (state.z * historyWeight) + (targetZ * targetWeight)
        
        local maxSpeed = 80.0
        local speed = math.sqrt(state.x * state.x + state.z * state.z)
        if speed > maxSpeed then
            state.x = (state.x / speed) * maxSpeed
            state.z = (state.z / speed) * maxSpeed
        end
        
        m.vel.x = state.x
        m.vel.z = state.z
        
        m.forwardVel = (m.vel.x * sins(m.faceAngle.y)) + (m.vel.z * coss(m.faceAngle.y))
    else
        state.x = m.vel.x
        state.z = m.vel.z
    end
end)

hook_chat_command("slippery", "[NUMBER]", function(msg)
    if not network_is_server() then
        djui_chat_message_create("Wait,You're not the host! You can ask the host to set it for you though.")
        if gMarioStates[0] ~= nil and gMarioStates[0].marioObj ~= nil then
            play_sound(SOUND_MENU_CAMERA_BUZZ, gMarioStates[0].marioObj.header.gfx.cameraToObject)
        end
        return true
    end
    
    local num = tonumber(msg)
    if num ~= nil then
        gGlobalSyncTable.slipperyAmount = num
        djui_chat_message_create("Slipperiness amount has been updated to: " .. tostring(num))
    else
        djui_chat_message_create("Please enter a valid number.")
    end
    return true
end)

hook_chat_command("slipperyamount", "Shows the current slippery setting", function(msg)
    local amt = gGlobalSyncTable.slipperyAmount or 3
    djui_chat_message_create("Current slipperiness amount: " .. tostring(amt))
    return true
end)