game.c

#include "game.h"
#include "screen_printing.h"
#include "text_print.h"
#include "snake.h"
#include "apple.h"

#include <stdlib.h>
#include <time.h>

static struct timespec loop_delay;

game_t *init_game(){
  game_t *new_game = malloc(sizeof(game_t));
  new_game->is_game = 1;
  new_game->is_multiplayer = 0;
  new_game->speed = 1;
  new_game->is_border = 1;
  new_game->is_eating = 1;
  new_game->font_scale = 2;
  return new_game;
}

void free_game(){
    free(game);
}

void setup_speed(){
  
  if(game->speed == 0){
    loop_delay.tv_nsec = 100 * 1000 * 1000;
  }
  else if(game->speed == 1){
    loop_delay.tv_nsec = 200 * 1000 * 100;
  }
  else if(game->speed == 2){
    loop_delay.tv_nsec = 200 * 1000 * 10;
  }
  
}

void start_game(board_values **lcd_board, board_values **scaled_board){

  empty_board(scaled_board);
  print_statusbar(scaled_board);

  snake_t *snake1 = init_snake(20,10,23,10,SNAKE1);
  snake_t *snake2 = init_snake(20,30,23,30,SNAKE2);

  generate_snake_on_board(scaled_board, snake1);
  generate_snake_on_board(scaled_board, snake2);

  apple_t *apple = init_apple();

  reset_apple(scaled_board, apple);
  generate_apple_on_board(scaled_board, apple);

  
  if(game->is_multiplayer == 0){
    kill_snake(scaled_board, snake2);
  }


  direction red_knob_direction = NULL_DIRECTION, green_knob_direction = NULL_DIRECTION, blue_knob_direction = NULL_DIRECTION;

  time_t before = time(NULL);


  setup_speed();
  
  
  while (1) {
    
    // set snakes status indicator
    set_snakes_indicators(snake1,snake2);

    if(snake1->is_alive == 0 && snake2->is_alive == 0){
      remove_apple_from_board(scaled_board,apple);
       break;
    }

    // set knobs directions
    update_knobs_direction(&red_knob_direction, &green_knob_direction, &blue_knob_direction);


    //check input from keyboard and set snake direction
    keyboard_action k_a = read_from_keyboard();
    if(k_a == QUIT || k_a == QUIT_CAP){
      remove_apple_from_board(scaled_board,apple);
      break;
    }

    change_direction_from_keyboard(snake1,snake2,k_a);
    change_direction_from_knobs(snake1, red_knob_direction);
    change_direction_from_knobs(snake2,blue_knob_direction);

    snake1->has_eaten = 0;
    snake2->has_eaten = 0; 
    

    
    if(snake1->is_alive == 1 && snake2->is_alive == 1 && snake1->head->x == snake2->head->x && snake1->head->y == snake2->head->y){
      kill_snake(scaled_board, snake1);
      kill_snake(scaled_board, snake2);
    }

    
    move_snake(scaled_board, snake1);
    snake2->has_eaten = update_snake_from_board(scaled_board, snake2);
    move_snake(scaled_board,snake2);  
    snake1->has_eaten = update_snake_from_board(scaled_board, snake1);
    
    

    if(scaled_board[apple->y][apple->x] != APPLE){
      reset_apple(scaled_board, apple);
      generate_apple_on_board(scaled_board, apple);
     }


    print_statusbar(scaled_board);

    // update lcd_board from scaled_board
    update_lcd_board_from_scaled_board(scaled_board,lcd_board);

    

    // add statusbar
    print_scores(snake1->count, snake2->count, lcd_board);
    
    // printf("Time taken %d seconds %d milliseconds\n",msec/1000, msec%1000);
    print_timer(lcd_board,time(NULL) - before);

    // update microzed screen
    print_screen(lcd_board);



    //small sleep 
    clock_nanosleep(CLOCK_MONOTONIC, 0, &loop_delay, NULL);
    
  }

  free_apple(apple);
  free_snake(snake1);
  free_snake(snake2);

  game_over(lcd_board);
}

void game_over(board_values **lcd_board){
  print_string( 8 * 10,  4 * 3 * 10, "Game over !", TEXT, lcd_board);
  print_string( 8 * 10,  4 * 3 * 10 + text_height(), "Press any key to continue.", TEXT, lcd_board);
  
  print_screen(lcd_board);
  get_pause();
}