CREATE TABLE GlobalProperties(
       property INTEGER PRIMARY KEY,
       value TEXT
       );

CREATE TABLE Resources(
       internalId INTEGER PRIMARY KEY AUTOINCREMENT,
       resourceType INTEGER,
       publicId TEXT,
       parentId INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE
       );

CREATE TABLE MainDicomTags(
       id INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE,
       tagGroup INTEGER,
       tagElement INTEGER,
       value TEXT,
       PRIMARY KEY(id, tagGroup, tagElement)
       );

-- The following table was added in Orthanc 0.8.5 (database v5)
CREATE TABLE DicomIdentifiers(
       id INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE,
       tagGroup INTEGER,
       tagElement INTEGER,
       value TEXT,
       PRIMARY KEY(id, tagGroup, tagElement)
       );

CREATE TABLE Metadata(
       id INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE,
       type INTEGER,
       value TEXT,
       PRIMARY KEY(id, type)
       );

CREATE TABLE AttachedFiles(
       id INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE,
       fileType INTEGER,
       uuid TEXT,
       compressedSize INTEGER,
       uncompressedSize INTEGER,
       compressionType INTEGER,
       uncompressedMD5 TEXT,  -- New in Orthanc 0.7.3 (database v4)
       compressedMD5 TEXT,    -- New in Orthanc 0.7.3 (database v4)
       PRIMARY KEY(id, fileType)
       );              

CREATE TABLE Changes(
       seq INTEGER PRIMARY KEY AUTOINCREMENT,
       changeType INTEGER,
       internalId INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE,
       resourceType INTEGER,
       date TEXT
       );

CREATE TABLE ExportedResources(
       seq INTEGER PRIMARY KEY AUTOINCREMENT,
       resourceType INTEGER,
       publicId TEXT,
       remoteModality TEXT,
       patientId TEXT,
       studyInstanceUid TEXT,
       seriesInstanceUid TEXT,
       sopInstanceUid TEXT,
       date TEXT
       ); 

CREATE TABLE PatientRecyclingOrder(
       seq INTEGER PRIMARY KEY AUTOINCREMENT,
       patientId INTEGER REFERENCES Resources(internalId) ON DELETE CASCADE
       );

CREATE INDEX ChildrenIndex ON Resources(parentId);
CREATE INDEX PublicIndex ON Resources(publicId);
CREATE INDEX ResourceTypeIndex ON Resources(resourceType);
CREATE INDEX PatientRecyclingIndex ON PatientRecyclingOrder(patientId);

CREATE INDEX MainDicomTagsIndex1 ON MainDicomTags(id);
-- The 2 following indexes were removed in Orthanc 0.8.5 (database v5), to speed up
-- CREATE INDEX MainDicomTagsIndex2 ON MainDicomTags(tagGroup, tagElement);
-- CREATE INDEX MainDicomTagsIndexValues ON MainDicomTags(value COLLATE BINARY);

-- The 3 following indexes were added in Orthanc 0.8.5 (database v5)
CREATE INDEX DicomIdentifiersIndex1 ON DicomIdentifiers(id);
CREATE INDEX DicomIdentifiersIndex2 ON DicomIdentifiers(tagGroup, tagElement);
CREATE INDEX DicomIdentifiersIndexValues ON DicomIdentifiers(value COLLATE BINARY);

CREATE INDEX ChangesIndex ON Changes(internalId);

CREATE TRIGGER AttachedFileDeleted
AFTER DELETE ON AttachedFiles
BEGIN
  SELECT SignalFileDeleted(old.uuid, old.fileType, old.uncompressedSize, 
                           old.compressionType, old.compressedSize,
                           -- These 2 arguments are new in Orthanc 0.7.3 (database v4)
                           old.uncompressedMD5, old.compressedMD5);
END;

CREATE TRIGGER ResourceDeleted
AFTER DELETE ON Resources
BEGIN
  SELECT SignalResourceDeleted(old.publicId, old.resourceType);  -- New in Orthanc 0.8.5 (db v5)
  SELECT SignalRemainingAncestor(parent.publicId, parent.resourceType) 
    FROM Resources AS parent WHERE internalId = old.parentId;
END;

-- Delete a parent resource when its unique child is deleted 
CREATE TRIGGER ResourceDeletedParentCleaning
AFTER DELETE ON Resources
FOR EACH ROW WHEN (SELECT COUNT(*) FROM Resources WHERE parentId = old.parentId) = 0
BEGIN
  DELETE FROM Resources WHERE internalId = old.parentId;
END;

CREATE TRIGGER PatientAdded
AFTER INSERT ON Resources
FOR EACH ROW WHEN new.resourceType = 1  -- "1" corresponds to "ResourceType_Patient" in C++
BEGIN
  INSERT INTO PatientRecyclingOrder VALUES (NULL, new.internalId);
END;


-- Set the version of the database schema
-- The "1" corresponds to the "GlobalProperty_DatabaseSchemaVersion" enumeration
INSERT INTO GlobalProperties VALUES (1, "6");