#ifndef __VECTOR_H__
#define __VECTOR_H__

typedef struct {
    int *arr;
    int max_size;
    int cur_size;
} vector_t;

vector_t vector_init(int size);
// initialize vector with a initial capacity of size
int size(vector_t vec);
// returns the number of elements in vector
int capacity(vector_t vec);
// returns the capacity of vector
int is_empty(vector_t vec);
// return true if vector is empty, false if not
int at(vector_t vec, int index);
// returns the element at index
void push(vector_t *vec, int value);
// add element to end of vector
void insert(vector_t *vec, int index, int val);
// add element at index and pushing other elements to right
void delete_vec(vector_t *vec, int index);
// delete element at index, move other elements to left
void remove_val(vector_t *vec, int value);
// remove all instance of value in vector
void prepend(vector_t *vec, int value);
// add element at front of vector
int pop(vector_t *vec);
// remove element at end, return value of element
void print_vec(vector_t vec);
// printf the vector in [1, 2 ] format
void destroy_vec(vector_t *vec);
// deallocates the vector
int find_vec(vector_t vec, int value);
// find first occurance of value in vector
// return -1 if not found
void resize_vec_check(vector_t *vec);
// checks if vector capacity needs to be doubled or halves
// if cur_size == max_size, will double
// if cur_size <= max_size/4, will half
void resize_vec(vector_t *vec, int new_capacity);
// resizes the vector given the new_capacity 
// sets max_size to new_capacity

#endif