#include "fileGestion.h"


/**
 * @brief function that delete nRow lign in the beginning of the file rawData.csv . This function is necessary to not deal with the same ligns over and over
 * 
 * @param nRow number of lign in the beginning of the file rawData.csv that has to be delete
 */
void clearRawData(int nRow){
    char buffer[256];
    FILE *f = fopen("newFile.csv","w+");
    FILE *g = fopen("rawData.csv","r");
    for(int i  = 0; i < nRow; i++){ //first the program read the first nRow ligns of the csv file but do nothing
        fgets(buffer , sizeof buffer , g); 
    }
    while(1){ //then, till the end of the csv file it copy the lign to a new csv : newFile.csv
        if(!fgets(buffer,sizeof buffer , g)) break;
        fprintf(f,"%s",buffer);
    }
    remove("rawData.csv"); rename("newFile.csv", "rawData.csv"); //finally we remove the original file and rename the new one to replace rawData.csv
    fclose(f); fclose(g);
}
/**
 * @brief use to write one lign in the file "fileName"
 * 
 * @param array array that contaign all the values to write in the file
 * @param nCol size of the array (correspond to the number of captor used)
 */
void writeDataInFile(char* fileName , double array[], int nCol){
    FILE *f = fopen(fileName,"a+");
    for(int i = 0 ; i < nCol ; i++){
        if( i < nCol-1){
            fprintf(f, "%f , ", array[i]);
        } else {
            fprintf(f, "%f\n", array[i]);
        }
    }
    fclose(f);
}