/*
 * Copyright 2013-2018, Haiku, Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Ingo Weinhold <ingo_weinhold@gmx.de>
 *		Andrew Lindesay <apl@lindesay.co.nz>
 */


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

#include <package/RepositoryConfig.h>
#include <package/RepositoryInfo.h>


#define DIE(error, ...)								\
	do {											\
		fprintf(stderr, "Error: " __VA_ARGS__);		\
		fprintf(stderr, ": %s\n", strerror(error));	\
		exit(1);									\
	} while (false)

#define DIE_ON_ERROR(error, ...)		\
	do {								\
		status_t _error = error;		\
		if (error != B_OK)				\
			DIE(_error, __VA_ARGS__);	\
	} while (false)


static const char* sProgramName = "create_repository_config";


void
print_usage_and_exit(bool error)
{
	fprintf(error ? stderr : stdout,
		"Usage: %s [ <URL> ] <repository info> <repository config>\n"
		"Creates a repository config file from a given repository info and\n"
		"the base URL (the directory in which the \"repo\", \"repo.info\',\n"
		"and \"repo.sha256 files can be found). If the URL is not specified,\n"
		"the one from the repository info is used.",
		sProgramName);
	exit(error ? 1 : 0);
}


int
main(int argc, const char* const* argv)
{
	if (argc < 3 || argc > 4) {
		if (argc == 2
			&& (strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0)) {
				print_usage_and_exit(false);
		}
		print_usage_and_exit(true);
	}

	int argi = 1;
	const char* baseUrl = argc == 4 ? argv[argi++] : NULL;
	const char* infoPath = argv[argi++];
	const char* configPath = argv[argi++];

	// read the info
	BPackageKit::BRepositoryInfo repoInfo;
	DIE_ON_ERROR(repoInfo.SetTo(infoPath),
		"failed to read repository info file \"%s\"", infoPath);

	if (baseUrl == NULL) {
		if (repoInfo.BaseURL().IsEmpty()) {
			// legacy (pre-beta1) repositories may have a single "URL"
			// field acting both as baseURL and identifier.
			baseUrl = repoInfo.Identifier();
		} else
			baseUrl = repoInfo.BaseURL();
	}

	// init and write the config
	BPackageKit::BRepositoryConfig repoConfig;
	repoConfig.SetName(repoInfo.Name());
	repoConfig.SetBaseURL(baseUrl);
	repoConfig.SetIdentifier(repoInfo.Identifier());
	repoConfig.SetPriority(repoInfo.Priority());
	DIE_ON_ERROR(repoConfig.Store(configPath),
		"failed to write repository config file \"%s\"", configPath);

	return 0;
}