timer = {}
timer.timers = {}
local _timer = {}

function timer.new(name,time,callback,repeating)
    local t = {}
    repeating = repeating or false
    t.name = name
    t.time = time
    t.passed = 0
    t.callback = callback
    t.repeating = repeating
    t.running = false
    setmetatable(t,{__index=_timer})
    return t
end

function timer.add(timerObj)
    timer.timers[timerObj.name] = timerObj
end

function timer.remove(timerName)
    timer.timers[timerName] = nil
end

function timer.get(timerName)
    return timer.timers[timerName]
end

function timer.update(dt)
    local ticked = {}
    for k,v in pairs(timer.timers) do
        if(v.running) then if(v:update(dt)) then ticked[v.name]=true end end
    end
    return ticked
end

function _timer:start()
    self.passed = 0
    self.running = true
end

function _timer:pause()
    self.running = false
end

function _timer:resume()
    self.running = true
end

function _timer:stop()
    self.passed = 0
    self.running = false
end

function _timer:set(val)
    self.passed = val
end

function _timer:setCap(val,reset)
    self.time = val
    if(reset) then self.passed = 0 end
end

function _timer:getLeft()
    return self.time-self.passed
end

function _timer:isRunning()
    return self.running
end

function _timer:update(dt)
    self.passed = self.passed + dt
    local tick = false
    if(self.passed >= self.time) then
        tick = true
        if(self.callback) then self.callback() end
        self.passed = self.passed - self.time
        if(not self.repeating) then self.running = false end
    end
    return tick
end