// Scrolling API Menu V3.1

#include <WiFi.h>
#include <U8g2lib.h>
#include "config.h" // your ssid/password


// OLED object (same as your environment)
U8G2_SSD1306_128X64_NONAME_1_HW_I2C u8g2(U8G2_R0);

// Buttons (same pins you used before)
#define BUTTON_UP_PIN     27
#define BUTTON_SELECT_PIN 25
#define BUTTON_DOWN_PIN   26

// Menu
const int NUM_ITEMS = 5;
const char *menu_item[NUM_ITEMS] = {
  "Sunrise Sunset",
  "Dad Jokes",
  "Useless Facts",
  "Quotes",
  "Chuck Jokes"
};

// === Start OLED menu variables ===
int item_selected = 0;
int item_sel_previous = 0;
int item_sel_next = 0;

// button edge flags
int button_up_clicked = 0;
int button_select_clicked = 0;
int button_down_clicked = 0;

// screen state
int current_screen = 0; // 0 = menu, 1 = selected-item screen
// === End OLED menu variables ===

void setup() {
  Serial.begin(115200);

  // WiFi connect (blocking) - keep this in setup
  // === Start WiFi connection ===
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(200);
    Serial.print(".");
  }
  Serial.println();
  Serial.print("WiFi IP: ");
  Serial.println(WiFi.localIP());
  // === End WiFi connection ===

  // OLED init
  // === Start u8g2 setup ===
  u8g2.begin();
  u8g2.setFontMode(0);
  // === End u8g2 setup ===

  // === Button setup ===
  pinMode(BUTTON_UP_PIN, INPUT_PULLUP);
  pinMode(BUTTON_DOWN_PIN, INPUT_PULLUP);
  pinMode(BUTTON_SELECT_PIN, INPUT_PULLUP);
  // === End button setup ===
}

void loop() {
  // === handle UP/DOWN navigation (only when on menu) ===
  if (current_screen == 0) {
    if ((digitalRead(BUTTON_UP_PIN) == LOW) && (button_up_clicked == 0)) {
      item_selected--;
      button_up_clicked = 1;
      if (item_selected < 0) item_selected = NUM_ITEMS - 1;
    }
    if ((digitalRead(BUTTON_DOWN_PIN) == LOW) && (button_down_clicked == 0)) {
      item_selected++;
      button_down_clicked = 1;
      if (item_selected >= NUM_ITEMS) item_selected = 0;
    }
    if ((digitalRead(BUTTON_UP_PIN) == HIGH) && (button_up_clicked == 1)) {
      button_up_clicked = 0;
    }
    if ((digitalRead(BUTTON_DOWN_PIN) == HIGH) && (button_down_clicked == 1)) {
      button_down_clicked = 0;
    }
  }

  // === SELECT toggles between menu <-> item screen ===
  if ((digitalRead(BUTTON_SELECT_PIN) == LOW) && (button_select_clicked == 0)) {
    button_select_clicked = 1;
    if (current_screen == 0) {
      current_screen = 1; // enter selected-item screen
    } else {
      current_screen = 0; // go back to menu
    }
  }
  if ((digitalRead(BUTTON_SELECT_PIN) == HIGH) && (button_select_clicked == 1)) {
    button_select_clicked = 0;
  }

  // === compute prev/next for menu display ===
  item_sel_previous = item_selected - 1;
  if (item_sel_previous < 0) item_sel_previous = NUM_ITEMS - 1;
  
  item_sel_next = item_selected + 1;
  if (item_sel_next >= NUM_ITEMS) item_sel_next = 0;

  // --- Draw screen (one page cycle)
  u8g2.firstPage();
  do {
    if (current_screen == 0) {
      // Menu display (simple - 3 items: prev, selected, next)
      u8g2.setFont(u8g2_font_7x14_tf);
      u8g2.drawStr(26, 15, menu_item[item_sel_previous]);

      u8g2.setFont(u8g2_font_7x14B_tf); // bold for selected
      u8g2.drawStr(25, 37, menu_item[item_selected]);

      u8g2.setFont(u8g2_font_7x14_tf);
      u8g2.drawStr(26, 59, menu_item[item_sel_next]);

      // small scrollbar indicator (right side)
      u8g2.drawFrame(120, 0, 8, 64);
      int handleY = (64 / NUM_ITEMS) * item_selected;
      u8g2.drawBox(121, handleY, 6, (64 / NUM_ITEMS));
    }
    else { // current_screen == 1
      // Show immediate feedback that SELECT was pressed (no HTTP yet)
      u8g2.setFont(u8g2_font_ncenB08_tr);
      u8g2.drawStr(0, 20, "HTTP request...");
      u8g2.drawStr(0, 40, "Press SELECT to return");
    }
  } while (u8g2.nextPage());

  delay(20); // small delay to ease CPU (keeps responsiveness)
}