#include "displayText.h"
#include "Arduino.h"

//constructor
DisplayText::DisplayText(Adafruit_ST7796S_kbv& tftDisplay) : tft(tftDisplay) {
  tft.setCursor(0,0);
  tft.fillScreen(ST7796S_BLACK);
}
//display text public function
void DisplayText::writeText(char* text, int size, int posX, int posY, int screenTime, bool center, bool bottom) {
  if (center) {
    posX = centerText(text);
  }
  if (bottom) {
    posY = bottomText(text);
  }
  tft.setCursor(posX, posY);
  tft.setTextSize(size);
  printWordsFull(text);
  delay(screenTime);
}
//to center the text when enabled in the public function
int DisplayText::centerText(char* text) {
  int16_t x1, y1; 
  uint16_t w, h;
  tft.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
  int x = (tft.width() - w) / 2;
  return x;
}
//to dijsplay the text at the bottom when enabled in the public function
int DisplayText::bottomText(char* text) {
  int16_t x1, y1;
  uint16_t w, h;
  tft.getTextBounds(text, 0, 0, &x1, &y1, &w, &h);
  int y = (tft.height() - h);
  return y;
}

//attempt to write the text out in full (wip)
void DisplayText::printWordsFull(char* text) {
  
    char* textArray[100];
    int i = 0;
    //copy the text into a variable so the string can be re-used later
    char* textCopy = strdup(text);
    //split the text into words and put them into a array
    char* word = strtok(text, " ");
    while (word != NULL) {
        textArray[i] = word;
        word = strtok(NULL, " ");
        i++;
    }

    int lineWidth = 0;
    int maxLineWidth = 320; // replace with the width of your TFT display
    int charWidth = 11; // replace with the width of your characters
    for (int j = 0; j < i; j++) {
        //count the amount of letters in the word 
        int wordLength = strlen(textArray[j]);

        // If the word won't fit on the current line, move to the next line 
        if (lineWidth + wordLength * charWidth > maxLineWidth) {
            tft.println();
            //reset lineWidth
            lineWidth = 0;
        }
        //print the text
        tft.print(textArray[j]);
        tft.print(" ");
        lineWidth += (wordLength + 1) * charWidth; // +1 for the space
    }
  //removes textCopy out of the memory
  free(textCopy);

}