/**
 * Copyright (c) 2012 ooxi/xml.c
 *     https://github.com/ooxi/xml.c
 *
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the authors be held liable for any damages arising from the
 * use of this software.
 * 
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 *  1. The origin of this software must not be misrepresented; you must not
 *     claim that you wrote the original software. If you use this software in a
 *     product, an acknowledgment in the product documentation would be
 *     appreciated but is not required.
 * 
 *  2. Altered source versions must be plainly marked as such, and must not be
 *     misrepresented as being the original software.
 *
 *  3. This notice may not be removed or altered from any source distribution.
 */
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <xml.h>





/**
 * Will halt the program iff assertion fails
 */
static void _assert_that(_Bool condition, char const* message, char const* func, char const* file, int line) {
	if (!condition) {
		fprintf(stderr, "Assertion failed: %s, in %s (%s:%i)\n", message, func, file, line);
		exit(EXIT_FAILURE);
	}
}

#define assert_that(condition, message)					\
	_assert_that(condition, message, __func__, __FILE__, __LINE__)	



/**
 * @return true iff xml string equals the c string
 */
static _Bool string_equals(struct xml_string* a, char const* b) {
	size_t a_length = xml_string_length(a);
	size_t b_length = strlen(b);

	uint8_t* a_buffer = alloca((a_length + 1) * sizeof(uint8_t));
	xml_string_copy(a, a_buffer, a_length);
	a_buffer[a_length] = 0;

	if (a_length != b_length) {
		fprintf(stderr, "string_equals: %s#%i <> %s#%i\n", a_buffer, (int)a_length, b, (int)b_length);
		return false;
	}

	size_t i = 0; for (; i < a_length; ++i) {
		if (a_buffer[i] != b[i]) {
			fprintf(stderr, "string_equals: %s <> %s\n", a_buffer, b);
			return false;
		}
	}

	return true;
}



/**
 * Converts a static character array to an uint8_t data source
 */
#define SOURCE(source, content)						\
	uint8_t* source = alloca(strlen(content) * sizeof(uint8_t));	\
	{	size_t i = 0; for (; i < strlen(content); ++i) {	\
			source[i] = content[i];				\
		}							\
	}



/**
 * Tries to parse a simple document containing only one tag
 */
static void test_xml_parse_document_0() {
	SOURCE(source, "<Hello>World</Hello>");

	struct xml_document* document = xml_parse_document(source, strlen(source));
	assert_that(document, "Could not parse document");

	struct xml_node* root = xml_document_root(document);
	assert_that(string_equals(xml_node_name(root), "Hello"), "root node name must be `Hello'");
	assert_that(string_equals(xml_node_content(root), "World"), "root node content must be `World'");

	xml_document_free(document, false);
}

/**
 * Tries to parse a document containing multiple tags
 */
static void test_xml_parse_document_1() {
	SOURCE(source, ""
		"<Parent>\n"
		"\t<Child>\n"
		"\t\tFirst content\n"
		"\t</Child>\n"
		"\t<Child>\n"
		"\t\tSecond content\n"
		"\t</Child>\n"
		"</Parent>\n"
	);
	struct xml_document* document = xml_parse_document(source, strlen(source));
	assert_that(document, "Could not parse document");

	struct xml_node* root = xml_document_root(document);
	assert_that(string_equals(xml_node_name(root), "Parent"), "root node name must be `Parent'");
	assert_that(2 == xml_node_children(root), "root must have two children");

	struct xml_node* first_child = xml_node_child(root, 0);
	struct xml_node* second_child = xml_node_child(root, 1);
	assert_that(first_child && second_child, "Failed retrieving the children of root");

	struct xml_node* third_child = xml_node_child(root, 2);
	assert_that(!third_child, "root has a third child where non should be");

	assert_that(string_equals(xml_node_name(first_child), "Child"), "first_child node name must be `Child'");
	assert_that(string_equals(xml_node_content(first_child), "First content"), "first_child node content must be `First content'");
	assert_that(string_equals(xml_node_name(second_child), "Child"), "second_child node name must be `Child'");
	assert_that(string_equals(xml_node_content(second_child), "Second content"), "second_child node content must be `tSecond content'");

	xml_document_free(document, false);
}





/**
 * Console interface
 */
int main(int argc, char** argv) {
	test_xml_parse_document_0();
	test_xml_parse_document_1();

	fprintf(stdout, "All tests passed :-)\n");
	exit(EXIT_SUCCESS);
}