#include "SmartFeedback.hpp"

// bool: false => feedback less brewtime; true => feedback more brewtime
int SmartFeedback::calculateNewTime(bool feedback, JSONVar steepingLog, int currentSteepingTime)
{
    int numLogEntries = steepingLog.length();
    int steepingTimes[numLogEntries];
    for (int i = 0; i < numLogEntries; i++)
    {
        steepingTimes[i] = steepingLog[i]["steeping_seconds"];
    }

    // if there is no log yet, we just add/substract MAX_STEP
    if (numLogEntries == 0)
        return feedback ? currentSteepingTime + MAX_STEP : currentSteepingTime - MAX_STEP;

    // check the last brewing time
    int lastSteepingTime = steepingTimes[numLogEntries-1];
    Serial.print("last steeping time: ");
    Serial.println(lastSteepingTime);
    if (feedback)
    {
        // we want a longer brewing time

        if (lastSteepingTime >= currentSteepingTime)
            return currentSteepingTime + MIDDLE_STEP;

        if (lastSteepingTime < currentSteepingTime)
            return currentSteepingTime + MAX_STEP;
    }
    else
    {
        // we want a shorter brewing time

        if (lastSteepingTime > currentSteepingTime)
            return currentSteepingTime - MAX_STEP;

        if (lastSteepingTime <= currentSteepingTime)
            return currentSteepingTime - MIDDLE_STEP;
    }

    // something went wrong
    return 0;
}