#include <bshell/command/cmdlet.h>
#include <bshell/command/command.h>
#include <bshell/runtime/pipeline.h>
#include <bshell/status.h>
#include <fx/reflection/function.h>
#include <fx/string.h>
#include <fx/vector.h>

#define BSHELL_TYPE_GET_VERB (bshell_get_verb_get_type())

fx_type_id bshell_get_verb_get_type(void);

FX_DECLARE_TYPE(bshell_get_verb);

FX_TYPE_CLASS_DECLARATION_BEGIN(bshell_get_verb)
FX_TYPE_CLASS_DECLARATION_END(bshell_get_verb)

struct bshell_get_verb_p {
	fx_hashtable *c_verbs;
	const fx_iterator *c_it;
};

static enum bshell_status begin_processing(
	bshell_cmdlet *cmdlet,
	enum bshell_command_position position)
{
	struct bshell_get_verb_p *p
		= fx_object_get_private(cmdlet, BSHELL_TYPE_GET_VERB);
	p->c_verbs = bshell_get_all_verbs();
	p->c_it = fx_iterator_begin(p->c_verbs);
	return BSHELL_SUCCESS;
}

static enum bshell_status process_record(
	bshell_cmdlet *cmdlet,
	bshell_pipeline *pipeline,
	struct bshell_runtime *rt)
{
	struct bshell_get_verb_p *p
		= fx_object_get_private(cmdlet, BSHELL_TYPE_GET_VERB);

	do {
		const fx_value *v = fx_iterator_get_value(p->c_it);
		if (!v) {
			return BSHELL_SUCCESS;
		}

		fx_hashtable_item *item = NULL;
		fx_value_get_object(v, &item);

		v = fx_hashtable_item_get_value(item);

		bshell_verb *verb = NULL;
		fx_value_get_object(v, &verb);
		fx_iterator_move_next(p->c_it);

		if (bshell_verb_is_reserved(verb)) {
			continue;
		}

		bshell_pipeline_write_value(pipeline, *v, false);
		break;
	} while (1);

	return BSHELL_SUCCESS;
}

static enum bshell_status end_processing(bshell_cmdlet *cmdlet)
{
	struct bshell_get_verb_p *p
		= fx_object_get_private(cmdlet, BSHELL_TYPE_GET_VERB);
	if (p->c_it) {
		fx_iterator_unref(p->c_it);
		p->c_it = NULL;
	}

	return BSHELL_SUCCESS;
}

static void init(fx_object *obj, void *priv)
{
}

FX_TYPE_CLASS_BEGIN(bshell_get_verb)
	FX_TYPE_VTABLE_INTERFACE_BEGIN(fx_object, FX_TYPE_OBJECT)
		FX_INTERFACE_ENTRY(to_string) = NULL;
	FX_TYPE_VTABLE_INTERFACE_END(fx_object, FX_TYPE_OBJECT)

	FX_TYPE_VTABLE_INTERFACE_BEGIN(bshell_cmdlet, BSHELL_TYPE_CMDLET)
		FX_INTERFACE_ENTRY(c_verb) = BSHELL_VERB_GET;
		FX_INTERFACE_ENTRY(c_noun) = "Verb";
	FX_TYPE_VTABLE_INTERFACE_END(bshell_cmdlet, BSHELL_TYPE_CMDLET)

	FX_TYPE_VTABLE_INTERFACE_BEGIN(bshell_command, BSHELL_TYPE_COMMAND)
		FX_INTERFACE_ENTRY(c_begin_processing) = begin_processing;
		FX_INTERFACE_ENTRY(c_process_record) = process_record;
		FX_INTERFACE_ENTRY(c_end_processing) = end_processing;
	FX_TYPE_VTABLE_INTERFACE_END(bshell_cmdlet, BSHELL_TYPE_CMDLET)
FX_TYPE_CLASS_END(bshell_get_verb)

FX_TYPE_DEFINITION_BEGIN(bshell_get_verb)
	FX_TYPE_ID(0xa47976a6, 0xf7d8, 0x447f, 0x887b, 0x6c5d78b7bd2e);
	FX_TYPE_NAME("bshell.core.get_verb");
	FX_TYPE_EXTENDS(BSHELL_TYPE_CMDLET);
	FX_TYPE_CLASS(bshell_get_verb_class);
	FX_TYPE_INSTANCE_INIT(init);
	FX_TYPE_INSTANCE_PRIVATE(struct bshell_get_verb_p);
FX_TYPE_DEFINITION_END(bshell_get_verb)