#include <stdio.h>

#include <stdlib.h>

#include "array.h"

array * array_new()
{
	struct array * v;

	v = (struct array *) malloc( sizeof( struct array ) );

	v->capacity = ARRAY_INIT_CAPACITY;

	v->total = 0;

	v->items = malloc(sizeof(void *) * v->capacity);

	return v;
}

int array_length(array *v)
{
    return v->total;
}

char * array_join( struct array * parts, char * separator ) {

	int count = array_length( parts );

	char * fullText = "";

	for (int i = 0; i < count; ++i)
	{

		char * currentPart = array_get( parts, i );

		fullText = text_concatenate( fullText, currentPart );

		if( i < count-1 ) {

			fullText = text_concatenate( fullText, separator );

		}

		printf("join: %s\n", fullText);



		//fullText = text_concatenate( fullText, separator );

	}

	return fullText;

}

static void array_resize( array *v, int capacity )
{
	#ifdef DEBUG_ON

		printf("array_resize: %d to %d\n", v->capacity, capacity);

	#endif

	void **items = realloc( v->items, sizeof( void * ) * capacity );

	//if (items) {

		v->items = items;
		v->capacity = capacity;

	//}
}

void array_add( array * v, void * item )
{
	if ( v->capacity == v->total ){

		array_resize( v, v->capacity * 2 );

	}

    v->items[v->total++] = item;
}

void array_set( array * v, int index, void * item )
{

	if (index >= 0 && index < v->total){

		v->items[index] = item;

	}

}

void * array_get( array *v, int index )
{
	if ( index >= 0 && index < v->total ){

		return v->items[index];

	}

	return NULL;
}

int array_push( array * v, void * item ) {

	array_add( v, item );
	
	return  v->total;

}

void array_unshift( array * v, void * item ) {

	int length	= v->total;

	v->total++;

	if ( v->capacity == v->total ){

		array_resize( v, v->capacity * 2 );

	}

	for ( int i = length - 1; i >= 0; --i ) {

		v->items[ i + 1 ] = v->items[ i ];

	}

	v->items[ 0 ] = item;

}

void array_delete( array * v, int index)
{
    if ( index < 0 || index >= v->total ){

        return;

    }

    v->items[index] = NULL;

	for ( int i = index; i < v->total - 1; i++ ) {

		v->items[i] = v->items[i + 1];
		v->items[i + 1] = NULL;

	}

    v->total--;

    if ( v->total > 0 && v->total == v->capacity / 4 ){

        array_resize( v, v->capacity / 2 );

    }
}

void * array_pop( array * v ) {

	int count	= array_length( v );

	void * item	= array_get( v, count - 1  );

	array_delete( v, count - 1 );

	return item;

} 

void array_free(array *v)
{

    free( v->items );

}