CREATE SEQUENCE xmlwf_workflowitem_seq;
CREATE SEQUENCE xmlwf_collectionrole_seq;
CREATE SEQUENCE xmlwf_workflowitemrole_seq;
CREATE SEQUENCE xmlwf_claimtask_seq;
CREATE SEQUENCE xmlwf_in_progress_user_seq;
CREATE SEQUENCE xmlwf_pooltask_seq;

CREATE TABLE xmlwf_workflowitem
(
  workflowitem_id INTEGER PRIMARY KEY,
  item_id        INTEGER REFERENCES item(item_id) UNIQUE,
  collection_id  INTEGER REFERENCES collection(collection_id),

  -- Answers to questions on first page of submit UI
  multiple_titles       NUMBER(1),
  published_before      NUMBER(1),
  multiple_files        NUMBER(1)
  -- Note: stage reached not applicable here - people involved in workflow
  -- can always jump around submission UI

);

-- TODO: it seems like this index is already created by the 'unique' constraint in the table creation
-- CREATE INDEX xmlwf_wf_item_fk_idx ON xmlwf_workflowitem(item_id);
CREATE INDEX xmlwf_wf_coll_fk_idx ON xmlwf_workflowitem(collection_id);



CREATE TABLE xmlwf_collectionrole (
collectionrole_id INTEGER PRIMARY KEY,
role_id VARCHAR2(256),
collection_id integer REFERENCES collection(collection_id),
group_id integer REFERENCES epersongroup(eperson_group_id)
);
ALTER TABLE xmlwf_collectionrole ADD CONSTRAINT xmlwf_collectionrole_unique UNIQUE (role_id, collection_id, group_id);

CREATE INDEX xmlwf_cr_coll_role_fk_idx ON xmlwf_collectionrole(collection_id,role_id);
CREATE INDEX xmlwf_cr_coll_fk_idx ON xmlwf_collectionrole(collection_id);


CREATE TABLE xmlwf_workflowitemrole (
  workflowitemrole_id INTEGER PRIMARY KEY,
  role_id VARCHAR2(256),
  workflowitem_id integer REFERENCES xmlwf_workflowitem(workflowitem_id),
  eperson_id integer REFERENCES eperson(eperson_id),
  group_id integer REFERENCES epersongroup(eperson_group_id)
);

ALTER TABLE xmlwf_workflowitemrole
ADD CONSTRAINT xmlwf_workflowitemrole_unique UNIQUE (role_id, workflowitem_id, eperson_id);


CREATE INDEX xmlwf_wfir_item_role_fk_idx ON xmlwf_workflowitemrole(workflowitem_id,role_id);
CREATE INDEX xmlwf_wfir_item_fk_idx ON xmlwf_workflowitemrole(workflowitem_id);


CREATE TABLE xmlwf_pooltask (
  pooltask_id   INTEGER PRIMARY KEY,
  workflowitem_id   INTEGER REFERENCES xmlwf_workflowitem(workflowitem_id),
  workflow_id   VARCHAR2(256),
  step_id       VARCHAR2(256),
  action_id     VARCHAR2(256),
  eperson_id    INTEGER REFERENCES EPerson(eperson_id),
  group_id      INTEGER REFERENCES epersongroup(eperson_group_id)
);


CREATE INDEX xmlwf_pt_epers_fk_idx ON xmlwf_pooltask(eperson_id);
CREATE INDEX xmlwf_pt_wf_fk_idx ON xmlwf_pooltask(workflowitem_id);
CREATE INDEX xmlwf_pt_wf_epers_fk_idx ON xmlwf_pooltask(eperson_id,workflowitem_id);

CREATE TABLE xmlwf_claimtask (
  claimtask_id INTEGER PRIMARY KEY,
  workflowitem_id integer REFERENCES xmlwf_workflowitem(workflowitem_id),
  workflow_id VARCHAR2(256),
  step_id VARCHAR2(256),
  action_id VARCHAR2(256),
  owner_id integer REFERENCES eperson(eperson_id)
);

ALTER TABLE xmlwf_claimtask
ADD CONSTRAINT xmlwf_claimtask_unique UNIQUE (step_id, workflowitem_id, workflow_id, owner_id, action_id);


CREATE INDEX xmlwf_ct_wf_fk_idx ON xmlwf_claimtask(workflowitem_id);
CREATE INDEX xmlwf_ct_wf_epers_fk_idx ON xmlwf_claimtask(workflowitem_id,owner_id);
CREATE INDEX xmlwf_ct_epers_fk_idx ON xmlwf_claimtask(owner_id);
CREATE INDEX xmlwf_ct_wf_step_fk_idx ON xmlwf_claimtask(workflowitem_id,step_id);
CREATE INDEX xmlwf_ct_wf_step_act_fk_idx ON xmlwf_claimtask(workflowitem_id,step_id,action_id);
CREATE INDEX xmlwf_ct_wf_st_ac_ep_fk_idx ON xmlwf_claimtask(workflowitem_id,step_id,action_id,owner_id);



CREATE TABLE xmlwf_in_progress_user (
  in_progress_user_id INTEGER PRIMARY KEY,
  workflowitem_id integer REFERENCES xmlwf_workflowitem(workflowitem_id),
  user_id integer REFERENCES eperson(eperson_id),
  finished NUMBER(1)
);

ALTER TABLE xmlwf_in_progress_user
ADD CONSTRAINT xmlwf_in_progress_user_unique UNIQUE (workflowitem_id, user_id);

CREATE INDEX xmlwf_ipu_wf_fk_idx ON xmlwf_in_progress_user(workflowitem_id);
CREATE INDEX xmlwf_ipu_epers_fk_idx ON xmlwf_in_progress_user(user_id);
-- TODO: it seems like this index is already created by the 'unique' constraint in the table creation
-- CREATE INDEX xmlwf_ipu_wf_epers_fk_idx ON xmlwf_in_progress_user(workflowitem_id,user_id);