#ifndef SIEVE_STORAGE_PRIVATE_H
#define SIEVE_STORAGE_PRIVATE_H

#include "sieve.h"
#include "sieve-error-private.h"

#include "sieve-storage.h"
#include "sieve-storage-settings.h"

#define MAILBOX_ATTRIBUTE_PREFIX_SIEVE \
	MAILBOX_ATTRIBUTE_PREFIX_DOVECOT_PVT_SERVER"sieve/"
#define MAILBOX_ATTRIBUTE_PREFIX_SIEVE_FILES \
	MAILBOX_ATTRIBUTE_PREFIX_SIEVE"files/"
#define MAILBOX_ATTRIBUTE_SIEVE_DEFAULT \
	MAILBOX_ATTRIBUTE_PREFIX_SIEVE"default"

#define MAILBOX_ATTRIBUTE_SIEVE_DEFAULT_LINK 'L'
#define MAILBOX_ATTRIBUTE_SIEVE_DEFAULT_SCRIPT 'S'

struct sieve_storage;

ARRAY_DEFINE_TYPE(sieve_storage_class, const struct sieve_storage *);

struct sieve_storage_vfuncs {
	struct sieve_storage *(*alloc)(void);
	void (*destroy)(struct sieve_storage *storage);
	int (*init)(struct sieve_storage *storage);

	int (*autodetect)(struct sieve_instance *svinst,
			  struct event *event, const char *cause,
			  const struct sieve_storage_settings *storage_set,
			  enum sieve_storage_flags flags,
			  struct sieve_storage **storage_r,
			  enum sieve_error *error_code_r,
			  const char **error_r);

	int (*get_last_change)(struct sieve_storage *storage,
			       time_t *last_change_r);
	void (*set_modified)(struct sieve_storage *storage, time_t mtime);

	int (*is_singular)(struct sieve_storage *storage);

	/* script access */
	int (*get_script)(struct sieve_storage *storage, const char *name,
			  struct sieve_script **script_r);

	/* script sequence */
	int (*script_sequence_init)(struct sieve_script_sequence *sseq);
	int (*script_sequence_next)(struct sieve_script_sequence *sseq,
				    struct sieve_script **script_r);
	void (*script_sequence_destroy)(struct sieve_script_sequence *sseq);

	/* active script */
	int (*active_script_get_name)(struct sieve_storage *storage,
				      const char **name_r);
	int (*active_script_open)(struct sieve_storage *storage,
				  struct sieve_script **script_r);
	int (*deactivate)(struct sieve_storage *storage);
	int (*active_script_get_last_change)(struct sieve_storage *storage,
					     time_t *last_change_r);

	/* listing scripts */
	int (*list_init)(struct sieve_storage *storage,
			 struct sieve_storage_list_context **lctx_r);
	const char *(*list_next)(struct sieve_storage_list_context *lctx,
				 bool *active_r);
	int (*list_deinit)(struct sieve_storage_list_context *lctx);

	/* saving scripts */
	// FIXME: simplify this API; reduce this mostly to a single save function
	struct sieve_storage_save_context *(*save_alloc)(
		struct sieve_storage *storage);
	int (*save_init)(struct sieve_storage_save_context *sctx,
			 const char *scriptname, struct istream *input);
	int (*save_continue)(struct sieve_storage_save_context *sctx);
	int (*save_finish)(struct sieve_storage_save_context *sctx);
	struct sieve_script *(*save_get_tempscript)(
		struct sieve_storage_save_context *sctx);
	void (*save_cancel)(struct sieve_storage_save_context *sctx);
	int (*save_commit)(struct sieve_storage_save_context *sctx);
	int (*save_as)(struct sieve_storage *storage, struct istream *input,
		       const char *name);
	int (*save_as_active)(struct sieve_storage *storage,
			      struct istream *input, time_t mtime);

	/* checking quota */
	int (*quota_havespace)(struct sieve_storage *storage,
			       const char *scriptname, size_t size,
			       enum sieve_storage_quota *quota_r,
			       uint64_t *limit_r);
};

struct sieve_storage {
	pool_t pool;
	unsigned int refcount;
	struct sieve_instance *svinst;
	struct event *event;

	const char *driver_name;
	unsigned int version;

	const struct sieve_storage *storage_class;
	struct sieve_storage_vfuncs v;

	const char *name;
	const char *cause;
	const char *type;
	const char *script_name;
	const char *bin_path;

	uoff_t max_storage;
	unsigned int max_scripts;

	char *error;
	enum sieve_error error_code;

	struct sieve_storage *default_storage, *default_storage_for;

	struct mail_namespace *sync_inbox_ns;

	enum sieve_storage_flags flags;

	bool allows_synchronization:1;
	bool is_personal:1;
	bool is_default:1;
};

int sieve_storage_alloc(struct sieve_instance *svinst,
			struct event *event_parent,
			const struct sieve_storage *storage_class,
			const char *cause, const char *script_type,
			const char *storage_name, const char *script_name,
			enum sieve_storage_flags flags,
			struct sieve_storage **storage_r,
			enum sieve_error *error_code_r, const char **error_r);
int sieve_storage_alloc_with_settings(struct sieve_instance *svinst,
				      struct event *event_parent,
				      const struct sieve_storage *storage_class,
				      const char *cause,
				      const struct sieve_storage_settings *set,
				      enum sieve_storage_flags flags,
				      struct sieve_storage **storage_r,
				      enum sieve_error *error_code_r,
				      const char **error_r);

/*
 * Utility
 */

int sieve_storage_get_full_path(struct sieve_storage *storage,
				const char *path, const char **path_r);

/*
 * Binary
 */

int sieve_storage_setup_bin_path(struct sieve_storage *storage, mode_t mode);

/*
 * Comparison
 */

int sieve_storage_cmp(const struct sieve_storage *storage1,
		      const struct sieve_storage *storage2);
unsigned int sieve_storage_hash(const struct sieve_storage *storage);

/*
 * Active script
 */

int sieve_storage_active_script_is_default(struct sieve_storage *storage);

/*
 * Listing scripts
 */

struct sieve_storage_list_context {
	struct sieve_storage *storage;
	struct sieve_storage *def_storage;

	bool seen_active:1; // Just present for assertions
	bool seen_default:1;
};

/*
 * Saving scripts
 */

struct sieve_storage_save_context {
	pool_t pool;
	struct sieve_storage *storage;
	struct event *event;

	const char *scriptname, *active_scriptname;
	struct sieve_script *scriptobject;

	struct istream *input;

	time_t mtime;

	bool failed:1;
	bool finished:1;
};

/*
 * Storage sequence
 */

struct sieve_storage_sequence {
	struct sieve_instance *svinst;
	struct event *event_parent;
	char *cause;
	char *type;

	const struct sieve_storage_settings *storage_set;
	const char *const *storage_names;
	unsigned int storage_count, storage_index;
};

/*
 * Storage class
 */

struct sieve_storage_class_registry;

void sieve_storages_init(struct sieve_instance *svinst);
void sieve_storages_deinit(struct sieve_instance *svinst);

void sieve_storage_class_register(struct sieve_instance *svinst,
				  const struct sieve_storage *storage_class);
void sieve_storage_class_unregister(struct sieve_instance *svinst,
				    const struct sieve_storage *storage_class);
const struct sieve_storage *
sieve_storage_class_find(struct sieve_instance *svinst, const char *name);

/*
 * Built-in storage drivers
 */

/* data (currently only for internal use) */

#define SIEVE_DATA_STORAGE_DRIVER_NAME "data"

extern const struct sieve_storage sieve_data_storage;

/* file */

#define SIEVE_FILE_STORAGE_DRIVER_NAME "file"

extern const struct sieve_storage sieve_file_storage;

/* dict */

#define SIEVE_DICT_STORAGE_DRIVER_NAME "dict"

extern const struct sieve_storage sieve_dict_storage;

/* ldap */

#define SIEVE_LDAP_STORAGE_DRIVER_NAME "ldap"

extern const struct sieve_storage sieve_ldap_storage;

/*
 * Error handling
 */

void sieve_storage_set_internal_error(struct sieve_storage *storage);
void sieve_storage_set_not_found_error(struct sieve_storage *storage,
				       const char *name);

void sieve_storage_copy_error(struct sieve_storage *storage,
			      const struct sieve_storage *source);

/*
 * Synchronization
 */

int sieve_storage_sync_init(struct sieve_storage *storage,
			    struct mail_user *user);
void sieve_storage_sync_deinit(struct sieve_storage *storage);

int sieve_storage_sync_script_save(struct sieve_storage *storage,
				   const char *name);
int sieve_storage_sync_script_rename(struct sieve_storage *storage,
				     const char *oldname, const char *newname);
int sieve_storage_sync_script_delete(struct sieve_storage *storage,
				     const char *name);

int sieve_storage_sync_script_activate(struct sieve_storage *storage);
int sieve_storage_sync_deactivate(struct sieve_storage *storage);

#endif