#include <TFT_eSPI.h>
#include "config.h"
#include "display.h"

static TFT_eSPI tft = TFT_eSPI();
static bool lastSelectState = false;
static bool screenBlanked = false;
static unsigned long sysAStartMs = 0;

// ---------------------------------------------------------------------------
// Show the correct screen for the current input state
// ---------------------------------------------------------------------------
static void applyState(bool sysSelect) {
    screenBlanked = false;
    if (sysSelect) {
        // System A — show screen and start the blank timer
        displayShowSystemA(tft);
        sysAStartMs = millis();
    } else {
        // System B — show screen, no blank timer
        displayShowSystemB(tft);
    }
}

void setup() {
    // Internal pull-up: pin floating defaults to HIGH = System A
    pinMode(PIN_SYS_SELECT, INPUT_PULLUP);

    displayInit(tft);
    displayShowLogo(tft);
    displayShowSplash(tft);

    lastSelectState = digitalRead(PIN_SYS_SELECT);
    applyState(lastSelectState);
}

void loop() {
    bool state = digitalRead(PIN_SYS_SELECT);

    if (state != lastSelectState) {
        lastSelectState = state;
        applyState(state);
    }

    // Blank screen after timeout when sitting on System A
    if (lastSelectState && !screenBlanked) {
        if (millis() - sysAStartMs >= BLANK_TIMEOUT_MS) {
            displayBlank(tft);
            screenBlanked = true;
        }
    }

    delay(POLL_INTERVAL_MS);
}