/*
  Tami (MiniGatchi v7)
  - Arduino Nano + SSD1306 (128x64 I2C, yellow/blue)
  - Buttons: D7 = Left, D8 = Right, D9 = OK (Select)
  - Independent timers for hunger, happiness, poop
  - Hunger bar: full when pet is full, empties as pet gets hungry
  - Pet named "Tami" above its sprite
  - Cuter, smaller pet with poop mechanic
  - No sound, no splash

  Libraries required:
    Adafruit SSD1306
    Adafruit GFX
*/

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// -------- Display setup --------
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET   -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
const uint8_t I2C_ADDR = 0x3C;

// -------- Buttons --------
const uint8_t BTN_LEFT   = 2;  // cycle left
const uint8_t BTN_RIGHT  = 6;  // cycle right
const uint8_t BTN_SELECT = 5;  // OK

// -------- Game intervals --------
// Times are in milliseconds
const uint32_t HUNGER_INTERVAL = 600000; // 10 minutes
const uint32_t HAPPY_INTERVAL  = 900000; // 15 minutes
const uint32_t POOP_INTERVAL   = 300000; // 5 minutes

// -------- Pet state --------
int hunger = 0;       // 0 = full, 100 = starving
int happiness = 100;  // 0 = sad, 100 = very happy
int hygiene = 100;
// Poop blobs
struct Poop { bool active; uint8_t x; uint8_t y; };
const uint8_t MAX_POOPS = 5;
Poop poops[MAX_POOPS];

// -------- Timers --------
uint32_t lastHunger = 0;
uint32_t lastHappy  = 0;
uint32_t lastPoop   = 0;

// -------- Actions --------
enum Action { ACT_FEED = 0, ACT_PLAY = 1, ACT_CLEAN = 2, ACT_COUNT = 3 };
uint8_t selectedAction = 0;

// -------- Button debouncer --------
struct DebouncedButton {
  uint8_t pin;
  bool    lastStable;
  bool    lastRead;
  uint32_t lastChange;
  uint16_t debounceMs;
  DebouncedButton(uint8_t p, uint16_t d=30) : pin(p), lastStable(HIGH), lastRead(HIGH), lastChange(0), debounceMs(d) {}
  void begin() { pinMode(pin, INPUT_PULLUP); lastStable = lastRead = digitalRead(pin); lastChange = millis(); }
  bool fell() {
    bool r = digitalRead(pin);
    uint32_t now = millis();
    if (r != lastRead) { lastRead = r; lastChange = now; }
    if ((now - lastChange) > debounceMs && r != lastStable) {
      lastStable = r;
      if (lastStable == LOW) return true;
    }
    return false;
  }
};
DebouncedButton btnLeft(BTN_LEFT), btnRight(BTN_RIGHT), btnSelect(BTN_SELECT);

// -------- Utility --------
int clampi(int v, int lo, int hi){ if(v<lo) return lo; if(v>hi) return hi; return v; }
uint8_t rand8() { return (uint8_t)((millis() * 1103515245UL + 12345UL) >> 24); }
uint8_t activePoopCount() { uint8_t n=0; for(uint8_t i=0;i<MAX_POOPS;i++) if(poops[i].active) n++; return n; }
void clearAllPoop(){ for(uint8_t i=0;i<MAX_POOPS;i++) poops[i].active=false; }

void addPoop() {
  for (uint8_t i=0;i<MAX_POOPS;i++) {
    if (!poops[i].active) {
      poops[i].active = true;
      poops[i].x = 88 + (rand8() % 20);
      poops[i].y = 38 + (rand8() % 6);
      return;
    }
  }
}

// -------- Actions --------
void performAction(Action a) {
  switch(a) {
    case ACT_FEED:
      hunger = clampi(hunger - 20, 0, 100);   // feeding fills stomach
      break;
    case ACT_PLAY:
      happiness = clampi(happiness + 15, 0, 100);
      break;
    case ACT_CLEAN:
      clearAllPoop();
      hygiene = clampi(hygiene + 10, 0, 100);
      break;
  }
}

// -------- Drawing --------
void drawBar(int x, int y, int w, int h, int value/*0..100*/) {
  display.drawRect(x, y, w, h, WHITE);
  int fillW = map(value, 0, 100, 0, w-2);
  display.fillRect(x+1, y+1, fillW, h-2, WHITE);
}

void drawPoop(uint8_t x, uint8_t y) {
  display.fillCircle(x, y, 3, WHITE);
  display.fillCircle(x-2, y, 2, WHITE);
}

void drawPet(int x, int y) {
  // ---- helper: outlined rectangle (1px stroke) + corner dots ----
  auto rectOutline = [&](int tlx, int tly, int w, int h) {
    // top & bottom
   
    //display.drawLine(tlx,           tly,           tlx + w -1, tly,           WHITE);
    //display.drawLine(tlx,           tly + h -1,   tlx + w - 1, tly + h - 1,   WHITE);
    // left & right
    //display.drawLine(tlx,           tly,           tlx,         tly + h - 1,   WHITE);
    //display.drawLine(tlx + w -1,   tly,           tlx + w - 1, tly + h - 1,   WHITE);

    // corner dots (extra emphasis like in the reference pic)
    //display.drawPixel(tlx,         tly,         WHITE);
    //display.drawPixel(tlx + w - 1, tly,         WHITE);
    //display.drawPixel(tlx,         tly + h - 1, WHITE);
    //display.drawPixel(tlx + w - 1, tly + h - 1, WHITE);

  display.drawPixel(x-10, y+10,         WHITE);
    display.drawPixel(x-9, y+10,         WHITE);
    display.drawPixel(x-8, y+10,         WHITE);
    display.drawPixel(x-7, y+10,         WHITE);
    display.drawPixel(x-6, y+10,         WHITE);
    display.drawPixel(x-5, y+10,         WHITE);
    display.drawPixel(x-4, y+10,         WHITE);
    display.drawPixel(x-3, y+10,         WHITE);
    display.drawPixel(x-2, y+10,         WHITE);
    display.drawPixel(x-1, y+10,         WHITE);
    display.drawPixel(x, y+10,         WHITE);
    display.drawPixel(x+1, y+10,         WHITE);
    display.drawPixel(x+2, y+10,         WHITE);
    display.drawPixel(x+3, y+10,         WHITE);
    display.drawPixel(x+4, y+10,         WHITE);
    display.drawPixel(x+5, y+10,         WHITE);
    display.drawPixel(x+6, y+10,         WHITE);
    display.drawPixel(x+7, y+10,         WHITE);
    display.drawPixel(x+8, y+10,         WHITE);
    display.drawPixel(x+9, y+10,         WHITE);
    display.drawPixel(x+10, y+10,         WHITE);
    display.drawPixel(x-11, y+10,         WHITE);

  display.drawPixel(x-12, y+9,         WHITE);
    display.drawPixel(x-12, y+8,         WHITE);
    display.drawPixel(x-12, y+7,         WHITE);
    display.drawPixel(x-12, y+6,         WHITE);

  display.drawPixel(x+11, y+9,         WHITE);
    display.drawPixel(x+11, y+8,         WHITE);
    display.drawPixel(x+11, y+7,         WHITE);
    display.drawPixel(x+11, y+6,         WHITE);

  display.drawPixel(x-10, y+5,         WHITE);
    display.drawPixel(x-9, y+5,         WHITE);
    display.drawPixel(x-8, y+5,         WHITE);
    display.drawPixel(x-7, y+5,         WHITE);
    display.drawPixel(x-6, y+5,         WHITE);
    display.drawPixel(x-5, y+5,         WHITE);
    display.drawPixel(x-4, y+5,         WHITE);
    display.drawPixel(x-3, y+5,         WHITE);
    display.drawPixel(x-2, y+5,         WHITE);
    display.drawPixel(x-1, y+5,         WHITE);
    display.drawPixel(x, y+5,         WHITE);
    display.drawPixel(x+1, y+5,         WHITE);
    display.drawPixel(x+2, y+5,         WHITE);
    display.drawPixel(x+3, y+5,         WHITE);
    display.drawPixel(x+4, y+5,         WHITE);
    display.drawPixel(x+5, y+5,         WHITE);
    display.drawPixel(x+6, y+5,         WHITE);
    display.drawPixel(x+7, y+5,         WHITE);
    display.drawPixel(x+8, y+5,         WHITE);
    display.drawPixel(x+9, y+5,         WHITE);
    display.drawPixel(x+10, y+5,         WHITE);
    display.drawPixel(x-11, y+5,         WHITE);

//second tier
     display.drawPixel(x-9, y+4,         WHITE);

  display.drawPixel(x-10, y+3,         WHITE);
    display.drawPixel(x-10, y+2,         WHITE);
    display.drawPixel(x-10, y+1,         WHITE);
    display.drawPixel(x-10, y,         WHITE);

    display.drawPixel(x+8, y+4,         WHITE);

 display.drawPixel(x+9, y+3,         WHITE);
    display.drawPixel(x+9, y+2,         WHITE);
    display.drawPixel(x+9, y+1,         WHITE);
    display.drawPixel(x+9, y,         WHITE);

    display.drawPixel(x-9, y-1,         WHITE);
    display.drawPixel(x-8, y-1,         WHITE);
    display.drawPixel(x-7, y-1,         WHITE);
    display.drawPixel(x-6, y-1,         WHITE);
    display.drawPixel(x-5, y-1,         WHITE);
    display.drawPixel(x-4, y-1,         WHITE);
    display.drawPixel(x-3, y-1,         WHITE);
    display.drawPixel(x-2, y-1,         WHITE);
    display.drawPixel(x-1, y-1,         WHITE);
    display.drawPixel(x, y-1,         WHITE);
    display.drawPixel(x+1, y-1,         WHITE);
    display.drawPixel(x+2, y-1,         WHITE);
    display.drawPixel(x+3, y-1,         WHITE);
    display.drawPixel(x+4, y-1,         WHITE);
    display.drawPixel(x+5, y-1,         WHITE);
    display.drawPixel(x+6, y-1,         WHITE);
    display.drawPixel(x+7, y-1,         WHITE);
    display.drawPixel(x+8, y-1,         WHITE);

//third tier

     display.drawPixel(x-7, y-2,         WHITE);
  
    display.drawPixel(x-8, y-3,         WHITE);
    display.drawPixel(x-8, y-4,         WHITE);
    display.drawPixel(x-8, y-5,         WHITE);

    display.drawPixel(x+6, y-2,         WHITE);

    display.drawPixel(x+7, y-3,         WHITE);
    display.drawPixel(x+7, y-4,         WHITE);
    display.drawPixel(x+7, y-5,         WHITE);


    display.drawPixel(x-7, y-6,         WHITE);
    display.drawPixel(x-6, y-6,         WHITE);
    display.drawPixel(x-5, y-6,         WHITE);
    display.drawPixel(x-4, y-6,         WHITE);
    display.drawPixel(x-3, y-6,         WHITE);
    display.drawPixel(x-2, y-6,         WHITE);
    display.drawPixel(x-1, y-6,         WHITE);
    display.drawPixel(x, y-6,         WHITE);
    display.drawPixel(x+1, y-6,         WHITE);
    display.drawPixel(x+2, y-6,         WHITE);
    display.drawPixel(x+3, y-6,         WHITE);
    display.drawPixel(x+4, y-6,         WHITE);
    display.drawPixel(x+5, y-6,         WHITE);
    display.drawPixel(x+6, y-6,         WHITE);
 



  };

  // ---- tier sizes (kept to fit 26×20 nicely) ----
  // Bottom tier
  int bX = x - 11, bY = y + 6, bW = 22, bH = 6;
  // Middle tier (eyes live here)
  int mX = x - 10, mY = y + 0, mW = 20, mH = 6;
  // Top tier
  int tX = x - 8,  tY = y - 6, tW = 16, tH = 6;

  // ---- draw the three tiers with lines + pixels only ----
  
  rectOutline(bX, bY, bW, bH);
  rectOutline(mX, mY, mW, mH);
  rectOutline(tX, tY, tW, tH);

  // ---- triangle topper (left vertical, base, hypotenuse) ----
  int baseY = tY ;
  display.drawLine(x - 4, baseY,     x - 2, baseY - 5, WHITE); // left side
  display.drawLine(x - 2, baseY,     x + 4, baseY,     WHITE); // base
  display.drawLine(x - 2, baseY - 6, x + 4, baseY,     WHITE); // hypotenuse

  // ---- eyes: pixel-outline ovals + black pupils (no circles used) ----
  // Left eye outline (5×3-ish)

   display.drawPixel(x-5,y+2,WHITE);
   
   display.drawPixel(x-4,y+2,WHITE);
  

  int ey = mY + (mH / 2) - 1;
  int lx = x - 4;
  //display.drawPixel(lx - 2, ey,     WHITE);
  //display.drawPixel(lx + 2, ey,     WHITE);
  //display.drawPixel(lx - 1, ey - 1, WHITE);
  //display.drawPixel(lx + 1, ey - 1, WHITE);
  //display.drawPixel(lx - 1, ey + 1, WHITE);
  //display.drawPixel(lx + 1, ey + 1, WHITE);
  //display.drawLine (lx - 2, ey + 0, lx - 2, ey + 0, WHITE); // keep single-line count
  //display.drawLine (lx + 2, ey + 0, lx + 2, ey + 0, WHITE);

  // Right eye outline
  int rx = x + 4;

 display.drawPixel(x+3,y+2,WHITE);
 display.drawPixel(x+4,y+2,WHITE);

  //display.drawPixel(rx - 2, ey,     WHITE);
  //display.drawPixel(rx + 2, ey,     WHITE);
  //display.drawPixel(rx - 1, ey - 1, WHITE);
  //display.drawPixel(rx + 1, ey - 1, WHITE);
  //display.drawPixel(rx - 1, ey + 1, WHITE);
  //display.drawPixel(rx + 1, ey + 1, WHITE);
  //display.drawLine (rx - 2, ey + 0, rx - 2, ey + 0, WHITE);
  //display.drawLine (rx + 2, ey + 0, rx + 2, ey + 0, WHITE);

  // Pupils (black pixels)
 // display.drawPixel(lx, ey, BLACK);
 // display.drawPixel(rx, ey, BLACK);
}

void drawActionRow() {
  const int BASE_Y = 55;
  display.drawLine(0, 46, 127, 46, WHITE);

  // Left/Right arrows
  display.setCursor(2, BASE_Y); display.print(F("<"));
  display.setCursor(22, BASE_Y); display.print(F(">"));

  // Action text
  const char* actionTxt =
    (selectedAction == ACT_FEED)  ? "FEED" :
    (selectedAction == ACT_PLAY)  ? "PLAY" : "CLEAN";
  display.setCursor(34, BASE_Y); display.print(actionTxt);

  // Fixed OK on right
  display.setCursor(SCREEN_WIDTH - 18, BASE_Y);
  display.print(F("OK"));
}

void drawUI() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);

  // Stats (left column)
  display.setCursor(2, 6);
  display.print(F("full "));
  drawBar(35, 6, 52, 8, 100 - hunger);

  display.setCursor(2, 20);
  display.print(F("happy "));
  drawBar(35, 20, 52, 8, happiness);

  // Pet name "Tami" above the pet
  const char* petName = "Nugget";
  int16_t bx, by; uint16_t bw, bh;
  display.getTextBounds(petName, 0, 0, &bx, &by, &bw, &bh);
  int petNameX = 78 + (26 - bw) / 2;  // center text over pet body (width 26)
  display.setCursor(petNameX, 4);     // around y=8, just above pet
  display.print(petName);

  // Pet on right side
  drawPet(105, 23);

  // Poops
  for(uint8_t i=0;i<MAX_POOPS;i++) if(poops[i].active) drawPoop(poops[i].x, poops[i].y);

  // Bottom actions
  drawActionRow();

  display.display();
}

// -------- Setup / Loop --------
void setup() {
  if (!display.begin(SSD1306_SWITCHCAPVCC, I2C_ADDR)) { for(;;); }
  display.setRotation(2);   // <-- rotate everything 180°
  display.clearDisplay();
  display.display();

  btnLeft.begin(); btnRight.begin(); btnSelect.begin();
  clearAllPoop();
  drawUI();
  lastHunger = lastHappy = lastPoop = millis();
}


void loop() {
  uint32_t now = millis();

  // Timers
  if (now - lastHunger >= HUNGER_INTERVAL) {
    hunger = clampi(hunger + 1, 0, 100);
    lastHunger = now;
    drawUI();
  }
  if (now - lastHappy >= HAPPY_INTERVAL) {
    happiness = clampi(happiness - 1, 0, 100);
    lastHappy = now;
    drawUI();
  }
  if (now - lastPoop >= POOP_INTERVAL) {
    addPoop();
    lastPoop = now;
    drawUI();
  }

  // Navigation
  if (btnLeft.fell())  { selectedAction = (selectedAction + ACT_COUNT - 1) % ACT_COUNT; drawUI(); }
  if (btnRight.fell()) { selectedAction = (selectedAction + 1) % ACT_COUNT; drawUI(); }
  if (btnSelect.fell()) { performAction((Action)selectedAction); drawUI(); }
}