#include <graph.h>
#include "serpent.h"

void Update_Serpent(int pos_x[], int pos_y[], int segment, int old_x[], int old_y[]){
    int i = 0;
    int serpent;
    AfficherSprite(serpent, pos_x[0], pos_y[0]);
    for (i=1 ; i<segment ; i++){
        pos_x[i]=old_x[i-1];
        pos_y[i]=old_y[i-1];
        AfficherSprite(serpent, pos_x[i], pos_y[i]);
    }
    old_x[0]=pos_x[0];
    old_y[0]=pos_y[0];
    for (i=1 ; i<segment ; i++){
        old_x[i]=pos_x[i];
        old_y[i]=pos_y[i];
    }
}
void Collision_Serpent(int pos_x[], int pos_y[], int segment, int murx[], int mury[], int *go_on){
    int mur;
    int i;
    mur = ChargerSprite("../img/mur.png");
    /*Serpent contre coté*/
    if (pos_x[0] >1160 || pos_x[0]<=20){
            *go_on=0;
    }
    /*Serpent contre coté*/
    if (pos_y[0]<40 || pos_y[0] >=700){
        *go_on=0;
    }
    /*Serpent contre Serpent*/
    for (i = 1; i < segment; i++) {
        if (pos_x[0] == pos_x[i] && pos_y[0] == pos_y[i])
            *go_on = 0;
    }
    /*Serpent contre mur*/
    for(i=0; i<30;i++){
        if(pos_x[0] == murx[i] && pos_y[0] == mury[i]){
            *go_on=0;
        }
    }
}
void Controle(int *direction, int last_direction, int *go_on) {
    int t;
    while(ToucheEnAttente()) {
        t = Touche();
        switch(t) {
            case XK_Left:
                if (last_direction != 4) {
                    *direction = 3;
                }
                return;
            case XK_Right:
                if (last_direction != 3) {
                    *direction = 4;
                }
                return;
            case XK_Up:
                if (last_direction != 2) {
                    *direction = 1;
                }
                return;
            case XK_Down:
                if (last_direction != 1) {
                    *direction = 2;
                }
                return;
            case XK_Escape:
                *direction = 0;
                *go_on = 0;
                return;
            case XK_p:
                *direction = 0;
        }
    }
}
void Serpent(int pos_x[], int pos_y[], int old_x[], int old_y[], int *segment, int murx[], int mury[], int *go_on, int *direction) {
    int serpent;
    int x = 600;
    int y = 400;
    int i = 0;
    serpent=ChargerSprite("../img/serpent.png");
    for (i = 0; i < *segment; i++){
     AfficherSprite(serpent, x-(i*20), y);
      pos_x[i]=x-(i*20);
      pos_y[i]=y;
      old_x[i]=pos_x[i];
      old_y[i]=pos_y[i];
    }
    if (*direction == 1 && *direction != 2 ){
        pos_y[0]=old_y[0]-20;
    }
    if (*direction == 2 && *direction !=  1) {
        pos_y[0]=old_y[0]+20;
    }
    if (*direction == 3 & *direction != 4) {
        pos_x[0]=old_x[0]-20;
    }
    if (*direction == 4 && *direction != 3) {
        pos_x[0]=old_x[0]+20;
   }
 Update_Serpent(pos_x, pos_y, *segment, old_x, old_y);
 Collision_Serpent(pos_x, pos_y, *segment, murx, mury, go_on);
 usleep(100000);
}