#include "cache.h"

#include "config.h"

#include "commit.h"

#include "refs.h"

#include "notes-utils.h"

#include "repository.h"

void create_notes_commit(struct repository *r,

			 struct notes_tree *t,

			 struct commit_list *parents,

			 const char *msg, size_t msg_len,

			 struct object_id *result_oid)

{

	struct object_id tree_oid;

	assert(t->initialized);

	if (write_notes_tree(t, &tree_oid))

		die("Failed to write notes tree to database");

	if (!parents) {

		/* Deduce parent commit from t->ref */

		struct object_id parent_oid;

		if (!read_ref(t->ref, &parent_oid)) {

			struct commit *parent = lookup_commit(r, &parent_oid);

			if (parse_commit(parent))

				die("Failed to find/parse commit %s", t->ref);

			commit_list_insert(parent, &parents);

		}

		/* else: t->ref points to nothing, assume root/orphan commit */

	}

	if (commit_tree(msg, msg_len, &tree_oid, parents, result_oid, NULL,

			NULL))

		die("Failed to commit notes tree to database");

}

void commit_notes(struct repository *r, struct notes_tree *t, const char *msg)

{

	struct strbuf buf = STRBUF_INIT;

	struct object_id commit_oid;

	if (!t)

		t = &default_notes_tree;

	if (!t->initialized || !t->update_ref || !*t->update_ref)

		die(_("Cannot commit uninitialized/unreferenced notes tree"));

	if (!t->dirty)

		return; /* don't have to commit an unchanged tree */

	/* Prepare commit message and reflog message */

	strbuf_addstr(&buf, msg);

	strbuf_complete_line(&buf;;

	create_notes_commit(r, t, NULL, buf.buf, buf.len, &commit_oid);

	strbuf_insertstr(&buf, 0, "notes: ");

	update_ref(buf.buf, t->update_ref, &commit_oid, NULL, 0,

		   UPDATE_REFS_DIE_ON_ERR);

	strbuf_release(&buf;;

}

int parse_notes_merge_strategy(const char *v, enum notes_merge_strategy *s)

{

	if (!strcmp(v, "manual"))

		*s = NOTES_MERGE_RESOLVE_MANUAL;

	else if (!strcmp(v, "ours"))

		*s = NOTES_MERGE_RESOLVE_OURS;

	else if (!strcmp(v, "theirs"))

		*s = NOTES_MERGE_RESOLVE_THEIRS;

	else if (!strcmp(v, "union"))

		*s = NOTES_MERGE_RESOLVE_UNION;

	else if (!strcmp(v, "cat_sort_uniq"))

		*s = NOTES_MERGE_RESOLVE_CAT_SORT_UNIQ;

	else

		return -1;

	return 0;

}

static combine_notes_fn parse_combine_notes_fn(const char *v)

{

	if (!strcasecmp(v, "overwrite"))

		return combine_notes_overwrite;

	else if (!strcasecmp(v, "ignore"))

		return combine_notes_ignore;

	else if (!strcasecmp(v, "concatenate"))

		return combine_notes_concatenate;

	else if (!strcasecmp(v, "cat_sort_uniq"))

		return combine_notes_cat_sort_uniq;

	else

		return NULL;

}

static int notes_rewrite_config(const char *k, const char *v, void *cb)

{

	struct notes_rewrite_cfg *c = cb;

	if (starts_with(k, "notes.rewrite.") && !strcmp(k+14, c->cmd)) {

		c->enabled = git_config_bool(k, v);

		return 0;

	} else if (!c->mode_from_env && !strcmp(k, "notes.rewritemode")) {

		if (!v)

			return config_error_nonbool(k);

		c->combine = parse_combine_notes_fn(v);

		if (!c->combine) {

			error(_("Bad notes.rewriteMode value: '%s'"), v);

			return 1;

		}

		return 0;

	} else if (!c->refs_from_env && !strcmp(k, "notes.rewriteref")) {

		/* note that a refs/ prefix is implied in the

		 * underlying for_each_glob_ref */

		if (starts_with(v, "refs/notes/"))

			string_list_add_refs_by_glob(c->refs, v);

		else

			warning(_("Refusing to rewrite notes in %s"

				" (outside of refs/notes/)"), v);

		return 0;

	}

	return 0;

}

struct notes_rewrite_cfg *init_copy_notes_for_rewrite(const char *cmd)

{

	struct notes_rewrite_cfg *c = xmalloc(sizeof(struct notes_rewrite_cfg));

	const char *rewrite_mode_env = getenv(GIT_NOTES_REWRITE_MODE_ENVIRONMENT);

	const char *rewrite_refs_env = getenv(GIT_NOTES_REWRITE_REF_ENVIRONMENT);

	c->cmd = cmd;

	c->enabled = 1;

	c->combine = combine_notes_concatenate;

	c->refs = xcalloc(1, sizeof(struct string_list));

	c->refs->strdup_strings = 1;

	c->refs_from_env = 0;

	c->mode_from_env = 0;

	if (rewrite_mode_env) {

		c->mode_from_env = 1;

		c->combine = parse_combine_notes_fn(rewrite_mode_env);

		if (!c->combine)

			/*

			 * TRANSLATORS: The first %s is the name of

			 * the environment variable, the second %s is

			 * its value.

			 */

			error(_("Bad %s value: '%s'"), GIT_NOTES_REWRITE_MODE_ENVIRONMENT,

					rewrite_mode_env);

	}

	if (rewrite_refs_env) {

		c->refs_from_env = 1;

		string_list_add_refs_from_colon_sep(c->refs, rewrite_refs_env);

	}

	git_config(notes_rewrite_config, c);

	if (!c->enabled || !c->refs->nr) {

		string_list_clear(c->refs, 0);

		free(c->refs);

		free(c);

		return NULL;

	}

	c->trees = load_notes_trees(c->refs, NOTES_INIT_WRITABLE);

	string_list_clear(c->refs, 0);

	free(c->refs);

	return c;

}

int copy_note_for_rewrite(struct notes_rewrite_cfg *c,

			  const struct object_id *from_obj, const struct object_id *to_obj)

{

	int ret = 0;

	int i;

	for (i = 0; c->trees[i]; i++)

		ret = copy_note(c->trees[i], from_obj, to_obj, 1, c->combine) || ret;

	return ret;

}

void finish_copy_notes_for_rewrite(struct repository *r,

				   struct notes_rewrite_cfg *c,

				   const char *msg)

{

	int i;

	for (i = 0; c->trees[i]; i++) {

		commit_notes(r, c->trees[i], msg);

		free_notes(c->trees[i]);

	}

	free(c->trees);

	free(c);

}