#ifndef VOLGIT_GIT_PART_C
#define VOLGIT_GIT_PART_C VOLGIT_GIT_PART_C
#include <git_part.h>

int print_diff_line(const git_diff_delta *delta,const git_diff_hunk *hunk,const git_diff_line *line,FILE *out)
{
	size_t i;
	fprintf(out,"%c ",line->origin);
	for(i=0;i<line->content_len;++i)
		fprintf(out,"%c",line->content[i]);
	return 0;
}

void print_diff(FILE *out,git_tree *parent_tree,git_tree *current_tree,git_repository *repo)
{
	git_diff *diff_from_parent;
	size_t number_of_deltas=0;
	size_t i;

	git_diff_tree_to_tree(&diff_from_parent,repo,current_tree,parent_tree,NULL);

	git_diff_print(diff_from_parent,GIT_DIFF_FORMAT_PATCH_ID,(git_diff_line_cb)print_diff_line,out);

	if(diff_from_parent)
		git_diff_free(diff_from_parent);
}
void print_headers_and_commit_message(FILE *where,git_commit *current_commit,git_oid *current)
{
	const git_signature *who_commited;
	fprintf(where,"COMMIT: %s\n",git_oid_tostr_s(current));

	who_commited=git_commit_committer(current_commit);

	fprintf(where,"AUTHOR: %s <%s>\n",who_commited->name,who_commited->email);

	fprintf(where,"DATE: %s\n",ctime(&who_commited->when.time));


	fprintf(where,"\t%s\n",git_commit_message(current_commit));
}
void print_commits(int dir_fd,const git_reference *branch, git_repository *repo)
{
	const git_oid *id;
	FILE *log_file;
	FILE *diff_file;
	int diff_directory_fd;
	int files_directory_fd;

	git_revwalk *walker;
	git_oid current;
	git_commit *current_commit;
	git_time_t time_of_commit;
	git_tree *parent_tree=NULL;
	git_tree *current_tree;

	git_revwalk_new(&walker,repo);
	id=git_reference_target(branch);
	git_revwalk_push(walker,id);


	log_file=create_file(dir_fd,"log");
	diff_directory_fd=create_dir(dir_fd,"diffs");
	files_directory_fd=create_dir(dir_fd,"files");
	
	while(!git_revwalk_next(&current,walker))
	{
		git_commit_lookup(&current_commit,repo,&current);
		git_commit_tree(&current_tree,current_commit);

		if(parent_tree!=NULL)
		{
			diff_file=create_file(diff_directory_fd,git_oid_tostr_s(&current));

			print_diff(diff_file,parent_tree,current_tree,repo);

			git_tree_free(parent_tree);
		}else/*we only print the files of the HEAD*/
		{
			print_files(files_directory_fd,current_tree,repo);
		}
		
		print_headers_and_commit_message(log_file,current_commit,&current);

		parent_tree=current_tree;
		git_commit_free(current_commit);
	}

	git_revwalk_free(walker);
	fclose(log_file);
}

void print_branches(git_repository *repo)
{
	const char *branch_name;
	int branch_dir_fd;
	git_branch_iterator *it;
	git_reference *ref;
	git_branch_t branch_type=GIT_BRANCH_LOCAL;

	git_branch_iterator_new(&it,repo,branch_type);
	while(git_branch_next(&ref,&branch_type,it)==0)
	{
		git_branch_name(&branch_name,ref);	
		if(branch_name)
		{
			branch_dir_fd=create_branch_dir(branch_name);

			print_commits(branch_dir_fd,ref,repo);	

			close(branch_dir_fd);
		}else
		{
			printf("NULL\n");
		}
	}

	git_branch_iterator_free(it);
}
void print_files(int dir_fd,git_tree *tree,git_repository *repo)
{
	size_t number_of_entries;
	size_t i;
	const git_tree_entry *current_entry;

	number_of_entries=git_tree_entrycount(tree);
	
	for(i=0;i<number_of_entries;++i)
	{
		current_entry=git_tree_entry_byindex(tree,i);
		print_entry(current_entry,dir_fd,repo);
	}
}
int print_entry(const git_tree_entry *entry,int base_dir_fd,git_repository *repo)
{
	git_object *obj;
	const char *entry_name;

	git_tree_entry_to_object(&obj,repo,entry);
	entry_name=git_tree_entry_name(entry);

	switch(git_object_type(obj))
	{
		case GIT_OBJECT_TREE:
			{
				int new_dir_fd;
				git_tree *tree;

				tree=(git_tree*)obj;
				
				new_dir_fd=create_dir(base_dir_fd,entry_name);
				print_files(new_dir_fd,tree,repo);
			}
			break;
		case GIT_OBJECT_BLOB:
			{
				FILE *blob_file;
				const void *blob_data;
				size_t blob_size;
				git_blob *blob;

				blob=(git_blob*)obj;

				blob_file=create_file(base_dir_fd,entry_name);
				blob_size=git_blob_rawsize(blob);
				blob_data=git_blob_rawcontent(blob);

				fwrite(blob_data,blob_size,1,blob_file);

				fclose(blob_file);
			}
			break;
	}

	git_object_free(obj);
	return 0;
}
#endif