#include "unit-package.h"

#include "ctx.h"
#include "node.h"

static enum ivy_status parse_dot(struct ivy_parser *ctx, struct ivy_token *tok)
{
	struct unit_package_parser_state *state
		= parser_get_state(ctx, struct unit_package_parser_state);

	if (state->s_prev_token != IVY_TOK_IDENT) {
		return IVY_ERR_BAD_SYNTAX;
	}

	state->s_prev_token = IVY_SYM_DOT;
	return IVY_OK;
}

static enum ivy_status parse_ident(struct ivy_parser *ctx, struct ivy_token *tok)
{
	struct unit_package_parser_state *state
		= parser_get_state(ctx, struct unit_package_parser_state);

	struct ivy_ast_unit_package_node *node = (struct ivy_ast_unit_package_node *)(state->s_base.s_node);

	if (state->s_prev_token == IVY_TOK_IDENT) {
		return IVY_ERR_BAD_SYNTAX;
	}

	b_queue_push_back(&node->n_ident, &tok->t_entry);

	state->s_prev_token = IVY_TOK_IDENT;
	return IVY_OK;
}

static enum ivy_status parse_linefeed(struct ivy_parser *ctx, struct ivy_token *tok)
{
	struct unit_package_parser_state *state
		= parser_get_state(ctx, struct unit_package_parser_state);

	if (state->s_prev_token != IVY_TOK_IDENT) {
		return IVY_ERR_BAD_SYNTAX;
	}

	parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
	return IVY_OK;
}

static enum ivy_status add_child(
	struct ivy_ast_node *parent, struct ivy_ast_node *child)
{
	return IVY_ERR_NOT_SUPPORTED;
}

static void print(struct ivy_ast_node *node)
{
}

static void init_state(struct parser_state *sp)
{
	struct unit_package_parser_state *state
		= (struct unit_package_parser_state *)sp;
	state->s_prev_token = IVY_KW_PACKAGE;
}

struct ast_node_type unit_package_node_ops = {
	.n_add_child = add_child,
        .n_print = print,
	.n_init_state = init_state,
	.n_state_size = sizeof(struct unit_package_parser_state),
	.n_node_size = sizeof(struct ivy_ast_unit_package_node),
	.n_symbol_parsers = {
		[IVY_SYM_DOT] = parse_dot,
	},
	.n_token_parsers = {
		[IVY_TOK_IDENT] = parse_ident,
		[IVY_TOK_LINEFEED] = parse_linefeed,
	}

};