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#ifndef VOLGIT_SYSTEM_PART_C
#define VOLGIT_SYSTEM_PART_C VOLGIT_SYSTEM_PART_C
#include <system_part.h>

const char *default_header="<!DOCTYPE html><html><head><title>GIT</title></head><body>";
const char *default_footer="</body></html>";

struct Volgit_Options options;

void parse_options(int argc,char **argv)
{

	options.header=default_header;
	options.footer=default_footer;
	switch(argc)
	{
		case 5:
			options.header=read_file(argv[3]);
			options.footer=read_file(argv[4]);
		/*falltrough*/
		case 3:
			options.input_path=argv[1];
			options.output_path=argv[2];
			break;
		default:
			die("Usage: volgit source destination [ file-containint-header file-containing-footer ]\n");
	}

	options.output_dir_fd=open(options.output_path,O_RDONLY|O_DIRECTORY);
	if(options.output_dir_fd==-1)
	{
		mkdir(options.output_path,0770);
		options.output_dir_fd=open(options.output_path,O_RDONLY|O_DIRECTORY);
		if(options.output_dir_fd==-1)
			die("Could not open output dir\n");
	}
}
char* read_file(const char *filename)
{
	long file_size;
	int file;
	char *ret;
	struct stat file_stats;

	file=open(filename,O_RDONLY|O_CREAT);
	if(file==-1)
		die("Could not open file %s\n",filename);

	fstat(file,&file_stats);

	ret=malloc(file_stats.st_size+1);

	if(ret==NULL)
		die("Ran out of memory!\n");

	close(file);
	return ret;
}

int create_branch_dir(const char *branch_name)
{
	int ret=0;

	ret=openat(options.output_dir_fd,branch_name,O_DIRECTORY|O_RDONLY);	
	if(ret==-1)
	{
		if(mkdirat(options.output_dir_fd,branch_name,0770)==-1)
			die("Could not create branch directory for %s\n",branch_name);

		ret=openat(options.output_dir_fd,branch_name,O_DIRECTORY|O_RDONLY);	
		if(ret==-1)
			die("Could not open newly created directory for branch %s\n",branch_name);
	}

	return ret;
}
FILE* create_file(int branch_dir,const char *filename)
{
	int fd;
	unlinkat(branch_dir,filename,0);
	fd=openat(branch_dir,filename,O_CREAT|O_RDWR,0660);
	if(fd==-1)
		die("Could not open the file '%s' for one of the branches\n",filename);
	return fdopen(fd,"w");
}
int create_dir(int base_dir,const char *dir_name)
{
	int ret;
	ret=openat(base_dir,dir_name,O_DIRECTORY|O_RDONLY);	
	if(ret!=-1)
		return ret;

	mkdirat(base_dir,dir_name,0770);
	ret=openat(base_dir,dir_name,O_DIRECTORY|O_RDONLY);	
	if(ret==-1)
		die("Could not create the 'files' subdirectory of one of the branch dirs\n");

	return ret;
}

void die(const char *format, ...)
{
	va_list args;
	va_start(args,format);
	vfprintf(stderr,format,args);
	exit(1);
}
#endif