#include <stdlib.h>
#include <stdint.h>

#include <osmocom/core/talloc.h>
#include <osmocom/sim/sim.h>

static struct osim_decoded_element *
__element_alloc(void *ctx, const char *name, enum osim_element_type type,
		enum osim_element_repr repr)
{
	struct osim_decoded_element *elem;

	elem = talloc_zero(ctx, struct osim_decoded_element);
	if (!elem)
		return NULL;
	elem->name = name;
	elem->type = type;
	elem->representation = repr;

	if (elem->type == ELEM_T_GROUP)
		INIT_LLIST_HEAD(&elem->u.siblings);

	return elem;
}


struct osim_decoded_element *
element_alloc(struct osim_decoded_data *dd, const char *name,
	      enum osim_element_type type, enum osim_element_repr repr)
{
	struct osim_decoded_element *elem;

	elem = __element_alloc(dd, name, type, repr);
	if (!elem)
		return NULL;

	llist_add_tail(&elem->list, &dd->decoded_elements);

	return elem;
}

struct osim_decoded_element *
element_alloc_sub(struct osim_decoded_element *ee, const char *name,
	      enum osim_element_type type, enum osim_element_repr repr)
{
	struct osim_decoded_element *elem;

	elem = __element_alloc(ee, name, type, repr);
	if (!elem)
		return NULL;

	llist_add(&elem->list, &ee->u.siblings);

	return elem;
}


void add_filedesc(struct osim_file_desc *root, const struct osim_file_desc *in, int num)
{
	int i;

	for (i = 0; i < num; i++) {
		struct osim_file_desc *ofd = talloc_memdup(root, &in[i], sizeof(*in));
		llist_add_tail(&ofd->list, &root->child_list);
	}
}

struct osim_file_desc *alloc_df(void *ctx, uint16_t fid, const char *name)
{
	struct osim_file_desc *mf;

	mf = talloc_zero(ctx, struct osim_file_desc);
	mf->type = TYPE_DF;
	mf->fid = fid;
	mf->short_name = name;
	INIT_LLIST_HEAD(&mf->child_list);

	return mf;
}

struct osim_file_desc *
add_df_with_ef(struct osim_file_desc *parent,
		uint16_t fid, const char *name,
		const struct osim_file_desc *in, int num)
{
	struct osim_file_desc *df;

	df = alloc_df(parent, fid, name);
	df->parent = parent;
	llist_add_tail(&df->list, &parent->child_list);
	add_filedesc(df, in, num);

	return df;
}

struct osim_file_desc *
add_adf_with_ef(struct osim_file_desc *parent,
		const uint8_t *adf_name, uint8_t adf_name_len,
		const char *name, const struct osim_file_desc *in,
		int num)
{
	struct osim_file_desc *df;

	df = alloc_df(parent, 0xffff, name);
	df->type = TYPE_ADF;
	df->df_name = adf_name;
	df->df_name_len = adf_name_len;
	df->parent = parent;
	llist_add_tail(&df->list, &parent->child_list);
	add_filedesc(df, in, num);

	return df;
}

struct osim_file_desc *
osim_file_find_name(struct osim_file_desc *parent, const char *name)
{
	struct osim_file_desc *ofd;
	llist_for_each_entry(ofd, &parent->child_list, list) {
		if (!strcmp(ofd->short_name, name)) {
			return ofd;
		}
	}
	return NULL;
}



struct msgb *osim_new_apdumsg(uint8_t cla, uint8_t ins, uint8_t p1,
			      uint8_t p2, uint16_t lc, uint16_t le)
{
	struct osim_apdu_cmd_hdr *ch;
	struct msgb *msg = msgb_alloc(lc+le+sizeof(*ch)+2, "APDU");
	if (!msg)
		return NULL;

	ch = (struct osim_apdu_cmd_hdr *) msgb_put(msg, sizeof(*ch));
	msg->l2h = (char *) ch;

	ch->cla = cla;
	ch->ins = ins;
	ch->p1 = p1;
	ch->p2 = p2;

	msgb_apdu_lc(msg) = lc;
	msgb_apdu_le(msg) = le;

	if (lc == 0 && le == 0)
		msgb_apdu_case(msg) = APDU_CASE_1;
	else if (lc == 0 && le >= 1) {
		if (le <= 256)
			msgb_apdu_case(msg) = APDU_CASE_2;
		else
			msgb_apdu_case(msg) = APDU_CASE_2_EXT;
	} else if (le == 0 && lc >= 1) {
		if (lc <= 255)
			msgb_apdu_case(msg) = APDU_CASE_3;
		else
			msgb_apdu_case(msg) = APDU_CASE_3_EXT;
	} else if (lc >= 1 && le >= 1) {
		if (lc <= 255 & le <= 256)
			msgb_apdu_case(msg) = APDU_CASE_4;
		else
			msgb_apdu_case(msg) = APDU_CASE_4_EXT;
	}

	return msg;
}