#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <conio.h>
#define __TVA__ 1.21
#define __REDUC__ 0.9
#define __MAXNBRART__ 3

#define __STRLEN__ 34

typedef struct {
  char deisgnation[__STRLEN__];
  float prixHTVA;
  int quant;
} Article;
typedef struct {
  Article * article;
  unsigned int nbrArt;
} Panier;




void EncoderDate(int*, int*, int*);
int DateValide (int, int, int);
void afficherArticle(Article * article, unsigned int nbrArt, FILE * file);
void encoderArticle(Article * article);

int main()
{
    int j,m,a;
    char continuer = 'y';
    FILE * file;
    file = fopen("fact.txt","w");
    if(file == NULL)
    {
      printf("Erreur lors de l'ouvertur !\n");
      return -1;
    }

    Panier panier;
    panier.article = (Article *)malloc(sizeof(Article));
    panier.nbrArt = 1;
    if(panier.article == NULL)
    {
      printf("ERREUR ALLOCATION !");
      free(panier.article);
      return -1;
    }

    do
    {
        EncoderDate(&j,&m,&a);
    }
    while (!DateValide(j, m, a));

    do
    {
      printf("%u\n", panier.nbrArt);
      if(panier.nbrArt <= __MAXNBRART__)
      {
        encoderArticle(&(panier.article[panier.nbrArt-1]));
        printf("Y-a-t-il encore un article ?(Y|n)");
        fflush(stdin);
        scanf("%c", &continuer);
        if(panier.nbrArt < 3 && (continuer|0b00100000) == 'y')
        {
          printf("%u\n", panier.nbrArt);
          panier.nbrArt++;
          Article * tempArticle;
          tempArticle = (Article*)realloc(panier.article, sizeof(Article)*(panier.nbrArt));
          if(panier.article == NULL)
          {
            printf("ERREUR ALLOCATION !");
            free(tempArticle);
            free(panier.article);
            return -1;
          }
          else
          {
            panier.article = tempArticle;
          }
        }
        else
        {
          system("cls");
          printf("Vous avez ateint le nombre d'article maximum !\n\n");
          break;
        }
      }
    }while((continuer|0b00100000) == 'y');
    //En t�te de la facture
    printf("La Bulle Informatique\nRoute du Condroz 78, 4123 Neupre\n");
    printf("\nFacture a payer\n");
    printf("Date de facturation :");

    fprintf(file,"La Bulle Informatique\nRoute du Condroz 78, 4123 Neupre\n");
    fprintf(file,"\nFacture a payer\n");
    fprintf(file,"Date de facturation :");
    if (j<10)
    {
        if (m<10)
        {
            printf("0%d/0%d/%d", j, m, a);
            fprintf(file,"0%d/0%d/%d", j, m, a);
        }
        else
        {
            printf("0%d/%d/%d", j, m, a);
            fprintf(file,"0%d/%d/%d", j, m, a);
        }
    }
    else
    {
        if (m<10)
        {
            printf("%d/0%d/%d", j, m, a);
            fprintf(file,"%d/0%d/%d", j, m, a);
        }
        else
        {
            printf("%d/%d/%d", j, m, a);
            fprintf(file,"%d/%d/%d", j, m, a);
        }
    }
    printf("%u\n", panier.nbrArt);
    afficherArticle(panier.article,panier.nbrArt, file);
    getch();
    fclose(file);
    free(panier.article);
    return 0;
}
void EncoderDate(int *j, int *m, int *a)
{
    printf("Entrez la date sous cette forme : jj/mm/aaaa\n");
    fflush(stdin); scanf("%d/%d/%d",j,m,a);
}

int DateValide(int j, int m, int a)
{
    int bis;
    if(m != 2)
    {
        if(m >= 1 && m <= 7)
        {
            if(m %2 == 0)
            {
                if(j >= 1 && j <= 30) return 1;
                else return 0;
            }
            else
            {
                if(j >= 1 && j <= 31) return 1;
                else return 0;
            }
        }
        else if(m > 7 && m <= 12)
        {
            if(m %2 == 0)
            {
                if(j >= 1 && j <= 31) return 1;
                else return 0;
            }
            else
            {
                if(j >= 1 && j <= 30) return 1;
                else return 0;
            }
        }
        else return 0;
    }
    else
    {
        if(a %100 == 0)
        {
            if(a %400 == 0) bis = 1;
            else bis = 0;
        }
        else
        {
            if(a %4 == 0)bis = 1;
            else bis = 0;
        }
        if(bis == 1)
        {
            if(j >= 1  &&  j <= 29) return 1;
            else return 0;
        }
        else
        {
            if(j >= 1 && j <= 28) return 1;
            else return 0;
        }
    }
}


void afficherArticle(Article * article, unsigned int nbrArt,FILE * file)
{
  unsigned int i;
  printf("%u\n", nbrArt);
  float prixTot=0;
  fprintf(file,"\n|---------------------------------------------------------------------------------------------|\
                \n|         Designation              |     prixHTVA    |   Quantite   |   10%%   |   prixTVAC   |");
  printf("\n|---------------------------------------------------------------------------------------------|\
          \n|         Designation              |     prixHTVA    |   Quantite   |   10%%   |   prixTVAC   |");
  for(i=0;i<nbrArt;i++)
  {
    printf("\n|%34s|%12.2f Eur |%14d|    %c    |%12.2f   |",\
    article[i].deisgnation,article[i].prixHTVA,article[i].quant\
    ,(article[i].quant>=20)?'x':' ',\
    (article[i].quant>=20)?article[i].prixHTVA*__TVA__*__REDUC__*article[i].quant:article[i].prixHTVA*__TVA__*article[i].quant);
    fprintf(file,"\n|%34s|%12.2f Eur |%14d|    %c    |%12.2f   |",\
    article[i].deisgnation,article[i].prixHTVA,article[i].quant\
    ,(article[i].quant>=20)?'x':' ',\
    (article[i].quant>=20)?article[i].prixHTVA*__TVA__*__REDUC__*article[i].quant:article[i].prixHTVA*__TVA__*article[i].quant);

    prixTot += (article[i].quant>=20)?article[i].prixHTVA*__TVA__*__REDUC__*article[i].quant:article[i].prixHTVA*__TVA__*article[i].quant;
  }
  printf("\n|---------------------------------------------------------------------------------------------|");
  printf("\nPrix totale :%f", prixTot);

  fprintf(file,"\n|---------------------------------------------------------------------------------------------|");
  fprintf(file,"\nPrix totale :%f", prixTot);
}
void encoderArticle(Article * article)
{
  printf("\nVeuillez entrer le nom : ");
  scanf("%34s", article->deisgnation);
  printf("\nVeuillez entrer le prix a l'unite hors TVA : ");
  scanf("%f", &article->prixHTVA);
  printf("\nVeuillez entrer la quantite desiree : ");
  fflush(stdin);
  scanf("%d", &article->quant);
}