#include "2048.h"
#include <stdlib.h>
#include <time.h>

void game_add_block(Game game) {
    size_t x, y;
    int value;
    do {
        x = rand() % game.field_size_x; 
        y = rand() % game.field_size_y;
        value = (rand() % 2) + 1;
    } while (game.field[x][y] != 0);
    game.field[x][y] = value * 2;
}

Game game_init(size_t field_size_x, size_t field_size_y) {
    Game game;
    game.field_size_x = field_size_x;
    game.field_size_y = field_size_y;
    game.score = 0;
    game.field = malloc(sizeof(uint16_t *) * field_size_y);
    for (size_t i = 0; i < field_size_y; i++) {
        game.field[i] = calloc(field_size_x, sizeof(uint16_t) * field_size_x);
    }

    time_t t;
    srand((unsigned) time(&t));
    game_add_block(game);

    return game;
}

void game_destroy(Game game) {
    for (size_t i = 0; i < game.field_size_y; i++) {
        free(game.field[i]);
    }
    free(game.field);
    game.field = NULL;
}

uint8_t game_move(Game *game, Direction direction) {
    // setting up stuff for my funny two-way for loop
    // well technically speaking about 4-way because there
    // are two 2-way for loops
    /*
    int8_t y_dir = 0;
    int8_t x_dir = 0;
    size_t start_y = 0;
    size_t start_x = 0;
    switch(direction) {
        case NoDirection:
            return 0;
        case Up:
            y_dir = -1;
            start_y = game->field_size - 1;
            break;
        case Down:
            y_dir = 1;
            break;
        case Left:
            x_dir = -1;
            start_x = game->field_size - 1;
            break;
        case Right:
            x_dir = 1;
            break;
    }
    */


    game_add_block(*game);
    return 0;
}