#include <stdlib.h>
#include <assert.h>
#include "table_stacks.h"
#include "card_stack.h"
#include "card.h"
#include "game.h"

/**
 * Search index of table stack in which specified card is in
 * @param[in] stack_list Pointer to list of stacks to search
 * @param[in] c Card to search
 * @return Index of table stack with specified card; invalid index (NUM_TABLE_STACKS) if none found
 */
const uint8_t get_stack_idx_for_card(const table_stacks_t* stack_list, const card c)
{
	assert(stack_list != NULL);

	uint8_t idx = NUM_TABLE_STACKS;
	int16_t old_diff = MAX_CARD;

	for(int i=0; i<NUM_TABLE_STACKS; i++)
	{
		card stackcard = card_stack_top(&stack_list->stacks[i]);
		int16_t new_diff = c - stackcard;
		assert(new_diff != 0);

		if(new_diff < 0) // open card smaller than card on current stack
			continue;

		if(new_diff < old_diff)
		{
			old_diff = new_diff;
			idx = i;
		}
	}

	return idx;
}