#include "Pelican.h"
#include "PelicanTimer.h"
#include "Subject.h"

Pelican::Pelican() : pressed(false), RED_TIME(4), YELLOW_TIME(2), GREEN_TIME(3), FLASH_TIME(5), state(GREEN_IDLE) {
    myTimer = new PelicanTimer(*this, &Pelican::timerExpired);
}

void Pelican::press(void) {
    if (state == GREEN_IDLE) {
        state = YELLOW_STATE;
        myTimer->timeoutRequest(YELLOW_TIME);
        pressed = true;
    } else if (state != RED_STATE) {
        pressed = true;
    }
    notify(LightHint(state));
    notify(WaitHint(pressed));
}

void Pelican::timerExpired(void) {
    switch (state) {
    case RED_STATE:
        state = YELLOW_FLASHING;
        myTimer->timeoutRequest(FLASH_TIME);
        break;

    case YELLOW_FLASHING:
        state = GREEN_TIMING;
        myTimer->timeoutRequest(GREEN_TIME);
        break;

    case GREEN_TIMING:
        if (pressed) {
            state = YELLOW_STATE;
            myTimer->timeoutRequest(YELLOW_TIME);
        } else {
            state = GREEN_IDLE;
        }
        break;

    case GREEN_IDLE:
        //    should never happen
        break;

    case YELLOW_STATE:
        state = RED_STATE;
        pressed = false;
        myTimer->timeoutRequest(RED_TIME);
        break;
    }

    notify(LightHint(state));
    notify(WaitHint(pressed));
}