/*
  Copyright 2011 David Robillard <http://drobilla.net>

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <stdlib.h>
#include <string.h>

#include "serd_internal.h"

SERD_API
SerdNode
serd_node_from_string(SerdType type, const uint8_t* buf)
{
	size_t buf_n_bytes;
	const size_t buf_n_chars = serd_strlen(buf, &buf_n_bytes);
	SerdNode ret = { type, buf_n_bytes, buf_n_chars, buf };
	return ret;
}

SERD_API
SerdNode
serd_node_copy(const SerdNode* node)
{
	SerdNode copy = *node;
	uint8_t* buf  = malloc(copy.n_bytes);
	memcpy(buf, node->buf, copy.n_bytes);
	copy.buf = buf;
	return copy;
}

static size_t
serd_uri_string_length(const SerdURI* uri)
{
	size_t len = uri->path_base.len;

#define ADD_LEN(field, n_delims) \
	if ((field).len) { len += (field).len + (n_delims); }

	ADD_LEN(uri->path,      1);  // + possible leading `/'
	ADD_LEN(uri->scheme,    1);  // + trailing `:'
	ADD_LEN(uri->authority, 2);  // + leading `//'
	ADD_LEN(uri->query,     1);  // + leading `?'
	ADD_LEN(uri->fragment,  1);  // + leading `#'

	// Add 2 for authority // prefix (added even though authority.len = 0)
	return len + 2; // + 2 for authority //
}

static size_t
string_sink(const void* buf, size_t len, void* stream)
{
	uint8_t** ptr = (uint8_t**)stream;
	memcpy(*ptr, buf, len);
	*ptr += len;
	return len;
}

SERD_API
SerdNode
serd_node_new_uri_from_node(const SerdNode* uri_node,
                            const SerdURI*  base,
                            SerdURI*        out)
{
	return serd_node_new_uri_from_string(uri_node->buf, base, out);
}

SERD_API
SerdNode
serd_node_new_uri_from_string(const uint8_t* str,
                              const SerdURI* base,
                              SerdURI*       out)
{
	if (str[0] == '\0') {
		return serd_node_new_uri(base, NULL, out);  // Empty URI => Base URI
	} else {
		SerdURI uri;
		if (serd_uri_parse(str, &uri)) {
			return serd_node_new_uri(&uri, base, out);  // Resolve/Serialise
		}
	}
	return SERD_NODE_NULL;
}

SERD_API
SerdNode
serd_node_new_uri(const SerdURI* uri, const SerdURI* base, SerdURI* out)
{
	SerdURI abs_uri = *uri;
	if (base) {
		serd_uri_resolve(uri, base, &abs_uri);
	}

	const size_t len = serd_uri_string_length(&abs_uri);
	uint8_t*     buf = malloc(len + 1);

	SerdNode node = { SERD_URI, len + 1, len, buf };  // FIXME: UTF-8

	uint8_t*     ptr        = buf;
	const size_t actual_len = serd_uri_serialise(&abs_uri, string_sink, &ptr);

	buf[actual_len] = '\0';
	node.n_bytes    = actual_len + 1;
	node.n_chars    = actual_len;

	// FIXME: double parse
	if (!serd_uri_parse(buf, out)) {
		fprintf(stderr, "error parsing URI\n");
		return SERD_NODE_NULL;
	}

	return node;
}

SERD_API
void
serd_node_free(SerdNode* node)
{
	free((uint8_t*)node->buf);
}