CREATE TABLE systemMetadata (
   guid   VARCHAR2(2000),    -- the globally unique string identifier
   serial_version VARCHAR2(256), --the serial version of the object
   date_uploaded DATE, -- the date/time the document was first submitted
   rights_holder VARCHAR2(250), --the user who has rights to the document, usually the first persons to upload it
   checksum VARCHAR2(512), --the checksum of the doc using the given algorithm (see below)
   checksum_algorithm VARCHAR2(250), --the algorithm used to calculate the checksum
   origin_member_node VARCHAR2(250), --the member node where the document was first uploaded
   authoritive_member_node VARCHAR2(250), --the member node that currently controls the document
   date_modified DATE, -- the last date/time that the file was changed
   submitter VARCHAR2(256), -- the user who originally submitted the doc
   object_format VARCHAR2(256), --the format of the object
   size VARCHAR2(256), --the size of the object
   archived boolean,	 -- specifies whether this an archived object
   replication_allowed boolean,	 -- replication allowed
   number_replicas NUMBER(8), 	-- the number of replicas allowed
   obsoletes   VARCHAR2(2000),    -- the identifier of the record that this replaces
   obsoleted_by   VARCHAR2(2000),    -- the identifier of the record that replaces this record
   CONSTRAINT systemMetadata_pk 
		PRIMARY KEY (guid)
)

CREATE TABLE systemMetadataReplicationPolicy (
	guid VARCHAR2(2000),	-- the globally unique string identifier of the object that the system metadata describes
	member_node VARCHAR(250),	 -- replication member node
	policy VARCHAR2(2000),	 -- the policy (preferred, blocked, etc...TBD)
	CONSTRAINT systemMetadataReplicationPolicy_fk 
		FOREIGN KEY (guid) REFERENCES systemMetadata DEFERRABLE
);

CREATE TABLE systemMetadataReplicationStatus (
	guid VARCHAR2(2000),	-- the globally unique string identifier of the object that the system metadata describes
	member_node VARCHAR(250),	 -- replication member node
	status VARCHAR(250),	 -- replication status
	date_verified DATE, 	-- the date replication was verified   
	CONSTRAINT systemMetadataReplicationStatus_fk 
		FOREIGN KEY (guid) REFERENCES systemMetadata DEFERRABLE
);

DROP TABLE IF EXISTS identifier;

CREATE TABLE identifier (
   guid   VARCHAR2(2000), -- the globally unique string identifier
   docid  VARCHAR2(250),  -- the local document id #
   rev    NUMBER(8)       -- the revision part of the local identifier
);

/**
 * track the user-agent for the request
 */
ALTER TABLE access_log ADD COLUMN user_agent VARCHAR2(512);

/*
 * add the nodedatadate column to xml_nodes 
 * TODO: load the data into it (java?)
 */
ALTER TABLE xml_nodes ADD COLUMN nodedatadate TIMESTAMP;
ALTER TABLE xml_nodes_revisions ADD COLUMN nodedatadate TIMESTAMP;
ALTER TABLE xml_path_index ADD COLUMN nodedatadate TIMESTAMP;
CREATE INDEX xml_path_index_idx4 ON xml_path_index (nodedatadate);

/*
 * Register the new schema
 */
INSERT INTO xml_catalog (entry_type, public_id, system_id)
  VALUES ('Schema', '@eml2_1_1namespace@', '/schema/eml-2.1.1/eml.xsd');

/**
 * Generate GUIDs for docid.rev
 */
INSERT INTO identifier (docid, rev, guid) 
	SELECT docid, rev, docid || '.' || rev FROM xml_documents;

INSERT INTO identifier (docid, rev, guid)
	SELECT docid, revisionid, docid || '.' || revisionid 
	FROM xml_revisions
	WHERE docid || '.' || revisionid NOT IN (SELECT guid from identifier);

/*
 *  Allow guid in xml_access table (for system metadata)
*/
ALTER TABLE xml_access ADD COLUMN guid VARCHAR2(2000);
/**
 *  Expand accessfileid in xml_access table to hold guids
 */
ALTER TABLE xml_access ALTER COLUMN accessfileid TYPE VARCHAR2(2000);


/**
 * Upgrade xml_access records to use GUID from identifier table
 * NOTE: This duplicates existing access rules for every revision of a document
 */
INSERT INTO xml_access (
	guid, principal_name, permission, perm_type, perm_order, 
	docid, accessfileid, begin_time, end_time, ticket_count, subtreeid, startnodeid, endnodeid
)
	SELECT 
		id.guid, xa.principal_name, xa.permission, xa.perm_type, xa.perm_order, 
		xa.docid, xa.accessfileid, xa.begin_time, xa.end_time, xa.ticket_count, xa.subtreeid, xa.startnodeid, xa.endnodeid
	FROM identifier id, xml_access xa
	WHERE id.docid = xa.docid;

/**
 * Include inline data access rows -- they have a special guid: 'scope.docid.rev.index'
 */
INSERT INTO xml_access (
	guid, principal_name, permission, perm_type, perm_order, 
	docid, accessfileid, begin_time, end_time, ticket_count, subtreeid, startnodeid, endnodeid
)
	SELECT 
		docid, principal_name, permission, perm_type, perm_order, 
		docid, accessfileid, begin_time, end_time, ticket_count, subtreeid, startnodeid, endnodeid
	FROM xml_access
	WHERE docid like '%.%.%.%';

/**
 * Update the accessfileid to use guid
 * NOTE: uses the last revision's guid as the new accessfileid
 */
CREATE TABLE max_identifier (guid VARCHAR2(2000), docid VARCHAR2(250), rev NUMBER(8));

/** insert the max rev identifier for each document **/
INSERT INTO max_identifier (docid, rev, guid)
SELECT docid, MAX(rev), docid || '.' || MAX(rev)
FROM identifier
GROUP BY docid

/** only need to join on docid since there is a single row for the max docid **/
UPDATE xml_access
SET accessfileid = maxid.guid
FROM max_identifier maxid, xml_access xa
WHERE xa.accessfileid = maxid.docid
AND xa.guid IS NOT null

DROP TABLE max_identifier;

/**
 * Remove old access rules
 */
DELETE FROM xml_access WHERE guid is null;

/**
 * clean up the xml_access table
 */
ALTER TABLE xml_access DROP COLUMN docid;


/*
 * update the database version
 */
UPDATE db_version SET status=0;

INSERT INTO db_version (version, status, date_created) 
  VALUES ('2.0.0', 1, CURRENT_DATE);