#include<windows.h>
#include<GL/glut.h>
#include<stdio.h>
#include<string.h>
struct Produs{
	char producator[20];
	char model[20];
	int cantitate;
	int pret_fara_TVA;
	int TVA;
	float pret_cu_TVA;
};

//declararea variabilelor globale
int i, n, flag, q;
struct Produs p[20], aux;
FILE *f_in, *f_out;
int y, s=1;


//declararea functiilor
int Afisare(struct Produs a[]);
int cantitate(struct Produs a[]);
void display();

//programul MAIN
int main(int argc, char** argv) {
	int  op;
	float t;

	f_in = fopen("date.txt", "r");
	fscanf(f_in,"%d",&n); //citeste nr de linii
	for(i=0; i<n; i++){
	fscanf(f_in,"%s",p[i].producator);
	fscanf(f_in,"%s",p[i].model);
	fscanf(f_in,"%d",&p[i].cantitate);
	fscanf(f_in,"%d",&p[i].pret_fara_TVA);
	fscanf(f_in,"%d",&p[i].TVA);
	}
	fclose(f_in);

	printf("- 0 - STOP Program\n"
			"- 1 - Calculeaza Pret cu TVA\n"
			"- 2 - Sorteaza dupa Cantitate\n"
			"- 3 - Introducerea datelor in fisier nou\n"
			"- 4 - Grafic\n");
	fflush(stdout);
	scanf("%d",&op);

	while(op != 0){
		switch(op){
//Calculeaza Pret cu TVA
		case 1 :
			for(i=0; i<n; i++){
				t = 1 + (float)p[i].TVA / 100;
				p[i].pret_cu_TVA = (float)p[i].pret_fara_TVA * t;
			}
			break;
//Sorteaza dupa Cantitate
		case 2 :
			printf("/ 1 / - cantitate max\n/ 2 / - cantitate min\n");
			fflush(stdout);
			scanf("%d", &q);
			y = cantitate(p);
			break;
//Introducerea datelor in fisier nou
		case 3 :
			y = Afisare(p);
			break;
		case 4 :
			   glutInit(&argc, argv);
			   glutInitWindowSize(720, 720);
			   glutInitWindowPosition(50, 50);
			   glutCreateWindow("Grafic OpenGL ");
			   glutDisplayFunc(display);
			   glutMainLoop();
			break;
		}
		printf("- 0 - STOP Program\n"
				"- 1 - Calculeaza Pret cu TVA\n"
				"- 2 - Sorteaza dupa Cantitate\n"
				"- 3 - Introducerea datelor in fisier nou\n"
				"- 4 - Grafic\n");
		fflush(stdout);
		scanf("%d",&op);
	}

	printf("\n!!! SFIRSIT PROGRAM !!!");
	fflush(stdout);
	return 0;
}

//scrierea datelor in fisier nou
int Afisare(struct Produs a[]){
	f_out = fopen("date_out.txt", "w");
	for(i=0; i<n; i++){
	fprintf(f_out,"%s	",a[i].producator);
	fprintf(f_out,"%s	",a[i].model);
	fprintf(f_out,"%d	",a[i].cantitate);
	fprintf(f_out,"%d	",a[i].pret_fara_TVA);
	fprintf(f_out,"%d	",a[i].TVA);
	fprintf(f_out,"%.2f		",a[i].pret_cu_TVA);
	fprintf(f_out,"\n");
	}
	fclose(f_out);
	return s;
}
//sortare dupa cantitate
int cantitate(struct Produs a[]){
	if(q==1){
		do{
			flag=0;
			for(i=0; i<n-1; i++){
				if(a[i].cantitate < a[i+1].cantitate){
					aux = p[i];
					p[i] = p[i+1];
					p[i+1] = aux;
					flag=1;
				}
			}
		}
		while(flag != 0);
	}
	if(q==2){
		do{
			flag=0;
			for(i=0; i<n-1; i++){
				if(a[i].cantitate > a[i+1].cantitate){
					aux = p[i];
					p[i] = p[i+1];
					p[i+1] = aux;
					flag=1;
				}
			}
		}
		while(flag != 0);
	}
return s;
}

//Grafica
void display(){
	   char text[10], numar[10];
	   int i, j;
	   float dx, ky, max;
	   dx = 1.9 / n;

	   max = p[0].pret_cu_TVA;
	   for(i = 1; i < n; i++){
		   if(max < (p[i].pret_cu_TVA))
			   max = (p[i].pret_cu_TVA);
	   }

	   ky = 1.5 / max;

	   glClearColor(1.0f, 1.0f, 1.0f, 0.5f);
	   glClear(GL_COLOR_BUFFER_BIT);

	   for(i = 0; i < n; i++){
		   glBegin(GL_TRIANGLES);
		   glColor3f(1.0f, 0.0f, 0.0f);
		   glVertex2f(-0.95 + i * dx, -0.85);
		   glVertex2f(-0.95 + (i + 1) * dx - 0.02, -0.85);
		   glVertex2f(((-0.95 + i * dx)+(-0.95 + (i + 1) * dx - 0.02))/2, -0.9 + (p[i].pret_cu_TVA) * ky );
		   glEnd();

		 sprintf(text,"%s", p[i].model);
		 glRasterPos2f(-0.95 + i * dx + dx / 5, -0.9);
	     for(j = 0; j < strlen(text); j++){
		 glutBitmapCharacter(GLUT_BITMAP_8_BY_13, text[j]);
	     }
		sprintf(numar,"%.2f",p[i].pret_cu_TVA);
		glRasterPos2f(-0.95 + i * dx + dx / 5, -0.9 + p[i].pret_cu_TVA * ky + 0.05);
		for(j = 0; j < strlen(numar); j++){
		glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_10, numar[j]);
	     }
	  }
	   glFlush();
}