local Experiment = lib "class" ("Experiment")

Experiment:include(mixin "_has" ("Started"))
Experiment:include(mixin "_has" ("Function"))
Experiment:include(mixin "_has" ("StartTime"))
Experiment:include(mixin "_has" ("LogInterval"))
Experiment:include(mixin "_has" ("Frame"))

function Experiment:initialize()
    self.date = os.date()

    self.logger = (class "Logger"):new(self:getName() .. ".log.csv")

    self:setStarted(false) -- stop by default

    self:setLogInterval(0)
end

function Experiment:start()
    self:setStarted(true)
    self:setStartTime(lovr.timer.getTime())
    self:setFrame(0)
    self.logTime = 0
end

function Experiment:stop()
    self:setStarted(false)
    self.logger:getFile():flush()
end

function Experiment:getName()
    return "experiment-" .. self.date
end

function Experiment:update(dt)
    if self:getStarted() then
        -- update experiment
        self:setFrame(self:getFrame() + 1)

        self.logTime = self.logTime + dt
        if self.logTime >= self:getLogInterval() then
            self.logTime = self.logTime - self:getLogInterval()
            -- get all necessary values and print
            local f = self:getFunction()
            local values = f()
            self.logger:log(values)
        end
    end
end

return Experiment