#include <blue/core/iterator.h>

/*** PRIVATE DATA *************************************************************/

struct b_iterator_p {
	enum b_status it_status;
};

/*** PRIVATE FUNCTIONS ********************************************************/

static enum b_status iterator_get_status(const struct b_iterator_p *it)
{
	return it->it_status;
}

static enum b_status iterator_set_status(struct b_iterator_p *it, b_status status)
{
	it->it_status = status;
	return B_SUCCESS;
}

/*** PUBLIC FUNCTIONS *********************************************************/

b_iterator *b_iterator_begin(b_iterable *it)
{
	B_CLASS_DISPATCH_VIRTUAL_0(b_iterable, B_TYPE_ITERABLE, NULL, it_begin, it);
}

const b_iterator *b_iterator_cbegin(const b_iterable *it)
{
	B_CLASS_DISPATCH_VIRTUAL_0(b_iterable, B_TYPE_ITERABLE, NULL, it_cbegin, it);
}

enum b_status b_iterator_get_status(const b_iterator *it)
{
	B_CLASS_DISPATCH_STATIC_0(B_TYPE_ITERATOR, iterator_get_status, it);
}

enum b_status b_iterator_set_status(const b_iterator *it, b_status status)
{
	B_CLASS_DISPATCH_STATIC(B_TYPE_ITERATOR, iterator_set_status, it, status);
}

enum b_status b_iterator_move_next(const b_iterator *it)
{
	enum b_status status = B_ERR_NOT_SUPPORTED;

	b_iterator_class *iface = b_object_get_interface(it, B_TYPE_ITERATOR);
	if (iface && iface->it_move_next) {
		status = iface->it_move_next(it);
	}

	struct b_iterator_p *p = b_object_get_private(it, B_TYPE_ITERATOR);
	p->it_status = status;

	return status;
}

b_iterator_value b_iterator_get_value(b_iterator *it)
{
	B_CLASS_DISPATCH_VIRTUAL_0(
		b_iterator, B_TYPE_ITERATOR, B_ITERATOR_VALUE_NULL,
		it_get_value, it);
}

const b_iterator_value b_iterator_get_cvalue(const b_iterator *it)
{
	B_CLASS_DISPATCH_VIRTUAL_0(
		b_iterator, B_TYPE_ITERATOR, B_ITERATOR_VALUE_NULL,
		it_get_cvalue, it);
}

b_status b_iterator_erase(b_iterator *it)
{
	enum b_status status = B_ERR_NOT_SUPPORTED;

	b_iterator_class *iface = b_object_get_interface(it, B_TYPE_ITERATOR);
	if (iface && iface->it_erase) {
		status = iface->it_erase(it);
	}

	struct b_iterator_p *p = b_object_get_private(it, B_TYPE_ITERATOR);
	p->it_status = status;

	return status;
}

/*** CLASS DEFINITION *********************************************************/

// ---- b_iterator DEFINITION
B_TYPE_CLASS_DEFINITION_BEGIN(b_iterator)
	B_TYPE_CLASS_INTERFACE_BEGIN(b_object, B_TYPE_OBJECT)
		B_INTERFACE_ENTRY(to_string) = NULL;
	B_TYPE_CLASS_INTERFACE_END(b_object, B_TYPE_OBJECT)
B_TYPE_CLASS_DEFINITION_END(b_iterator)

B_TYPE_DEFINITION_BEGIN(b_iterator)
	B_TYPE_FLAGS(B_TYPE_F_ABSTRACT);
	B_TYPE_ID(0xfd40b67f, 0x7087, 0x40a9, 0x8fd8, 0x8ae27bd58c9e);
	B_TYPE_CLASS(b_iterator_class);
	B_TYPE_INSTANCE_PRIVATE(struct b_iterator_p);
B_TYPE_DEFINITION_END(b_iterator)

// ---- b_iterable DEFINITION
B_TYPE_CLASS_DEFINITION_BEGIN(b_iterable)
	B_TYPE_CLASS_INTERFACE_BEGIN(b_object, B_TYPE_OBJECT)
		B_INTERFACE_ENTRY(to_string) = NULL;
	B_TYPE_CLASS_INTERFACE_END(b_object, B_TYPE_OBJECT)
B_TYPE_CLASS_DEFINITION_END(b_iterable)

B_TYPE_DEFINITION_BEGIN(b_iterable)
	B_TYPE_FLAGS(B_TYPE_F_ABSTRACT);
	B_TYPE_ID(0x4bbabf2d, 0xfc5d, 0x40cc, 0x89fc, 0x164085e47f73);
	B_TYPE_CLASS(b_iterable_class);
B_TYPE_DEFINITION_END(b_iterable)