/*----------------------------------------------------------------------
 Project: InsoL@b                                                                 
 Author : user@B0                                          Tetalab.org    
 File   : displays.h                                         2026-04-21   
 This work is copyrighted under CERN Open Hardware Licence Version 2
------------------------------------------------------------------------
 Management of the I2C oled SH1306 for RP2040 Zero clone
----------------------------------------------------------------------*

------------------ Functions for Oled display ---------------------*/
#ifndef _INSOLAB_DISPLAYS_H_ 
#define _INSOLAB_DISPLAYS_H_ 
#include "bitmaps.h"
#include "ledRGB.h"
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>


// Declaration for SSD1306 display on I2C (SDA, SCL pins)
// The pins for I2C are defined by the Wire-library. 
// Default on RP2040 Zero:   SDA GPIO 4 SCL GPIO 5
#include <Adafruit_SSD1306.h>
#define OLED_WIDTH  128 // OLED display width, in pixels
#define OLED_RST     -1 // Reset pin

#ifdef ESSAIS
#define OLED_HEIGHT  64 // OLED display height, in pixels
#define OLED_ADR   0x3D //Address 0x3D/0x3C to 128x64, 0x3C to 128x32
#else
#define OLED_HEIGHT  32 // OLED display height, in pixels
#define OLED_ADR   0x3C 
#endif
Adafruit_SSD1306 oled(OLED_WIDTH, OLED_HEIGHT, &Wire, OLED_RST);

char _oledmsg[32]; // general purpose character buffer

void showTxt1(uint8_t x, uint8_t y, char* txt) {
  oled.clearDisplay();
  oled.setTextSize(1);  oled.setTextColor(SSD1306_WHITE);           
  oled.setCursor(x,y);       // O,0 at top-left corner
  sprintf(_oledmsg,"CR:%s",txt);
  oled.println(txt);
  oled.display();
}
void showText(String l1, String l2) {
  oled.clearDisplay(); oled.setTextColor(SSD1306_WHITE);
  oled.setTextSize(2); oled.setCursor(0,0);  oled.println(l1);
  oled.setTextSize(1); oled.setCursor(0,18); oled.println(l2);
  oled.display();
}

void showInit() {
  ledInit();  ledRGB(BLANK); //ledRGB(RED);
  if(!oled.begin(SSD1306_SWITCHCAPVCC, OLED_ADR)) {
    Serial.begin(115200); delay(100);
    Serial.println(F("SSD1306 allocation failed"));
    ledRGB(RED); 
    for(;;); // Don't proceed, loop forever
  }   
  //sprintf(_oledmsg, "SSD1306 @ %2d OK", OLED_ADR); oledTxt1(0,0,_oledmsg);
  delay(100);  //  Serial.println(_oledmsg);
}
void showLOGO(int16_t gt) { /*--------- logo on SSD1306 -------------*/
  oled.clearDisplay();
  oled.drawBitmap(
    LOGO_X0, LOGO_Y0,logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, LOGO_COLOR);
  oled.display(); 
  playRTTTL(sLOGO);
   delay(gt); 
}
void showTITRE() {  // TextSize(2)=>10char, TextSize(1)=>22char,
  oled.clearDisplay();
  oled.setCursor(0,0); oled.setTextSize(2);   // doble scale
  oled.setTextColor(SSD1306_WHITE);
  oled.println(F("InsoLab UV"));              // 10 chars  max
  oled.setTextSize(1);  oled.setCursor(0,18); // Normal 1:1 pixel scale
  oled.println(F(" Any button to start"));    // 21 chars  max
  oled.display();
}
void showCHOIX(uint16_t t) {
  oled.clearDisplay();   oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(0,0); oled.setTextSize(2);
  sprintf(_oledmsg,"Expo: %3ds",t);          // 10 chars max
  oled.println(_oledmsg);
  oled.setCursor(0,18); oled.setTextSize(1); // 21 chars max 
  oled.println(F("- goto UV, + settings"));
  oled.display();
}
void showEXPOS(uint16_t t, int16_t m) {
  oled.clearDisplay();  oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(0,0);  oled.setTextSize(2); 
  sprintf(_oledmsg,"Count:%3ds",t);           oled.println(_oledmsg);
  oled.setCursor(0,18); oled.setTextSize(1);
  sprintf(_oledmsg,"- stop, + add up %3ds",m); oled.println(_oledmsg);    
  oled.display(); delay(200);
}
void showREGLE() {
  oled.clearDisplay();  oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(0,0);  oled.setTextSize(2);
  oled.println(F("Set values"));
  oled.setCursor(0,18); oled.setTextSize(1);
  sprintf(_oledmsg,"- UVtime, + step time"); oled.println(_oledmsg);    
  oled.display();
}
void showDUREE(uint16_t t) {
  oled.clearDisplay();  oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(0,0);  oled.setTextSize(2); 
  sprintf(_oledmsg,"Time: %3ds",t);           oled.println(_oledmsg);
  oled.setCursor(0,18); oled.setTextSize(1);
  sprintf(_oledmsg,"- less, + more"); oled.println(_oledmsg);    
  oled.display();
}
void showINCRE(uint16_t t) {
  oled.clearDisplay();  oled.setTextColor(SSD1306_WHITE);
  oled.setCursor(0,0);  oled.setTextSize(2); 
  sprintf(_oledmsg,"Step: %3d",t);           oled.println(_oledmsg);
  oled.setCursor(0,18); oled.setTextSize(1);
  sprintf(_oledmsg,"- less, + more"); oled.println(_oledmsg);    
  oled.display();
}
#endif // _INSOLAB_DISPLAYS_H_