create table as_item_types (
	item_type_id	integer
			constraint as_item_type_id_pk
			primary key,
	item_type_default_locale	varchar(30),
	item_type_name	varchar(500)
			constraint as_item_type_name_nn
			not null,
	item_type_description	varchar(500),
	-- This is the expected data_type of the answer
	data_type	varchar(25)
			constraint as_item_types_data_type_nn
			not null,
			constraint as_item_types_data_type_ck
			check (data_type in ('integer','numeric','varchar','text','date','boolean','timestamp','content_type',''))
);

create table as_item_type_attributes (
	attribute_id	integer
			constraint as_item_type_attribute_id_pk
			primary key,
	item_type_id	integer
			constraint as_item_type_attributes_item_type_id_fk
                        references as_item_types (item_type_id),
	attribute_name	varchar(500)
			constraint as_item_type_attributes_attribute_name_nn
			not null,
	-- NOTE Is this correct?
	-- type of the attribute (could be varchar, integer, cr_item)
	attribute_type	integer
			constraint as_item_type_attributes_attribute_type_nn
			not null,
	per_instance_p	char(1) default 'f'
			constraint as_item_type_attributes_per_instance_p_ck
			check (per_instance_p in ('t','f'))
);

create table as_item_display_types (
	item_display_type_id	integer
			constraint as_item_display_type_id_pk
			primary key,
	-- name like "Select box, aligned right"
	item_type_name	varchar(500)
			constraint as_item_display_types_type_name_nn
			not null,
	presentation_type	varchar(25)
			constraint as_item_display_types_presentation_type_nn
			not null,
			constraint as_item_display_types_presentation_type_ck
			check (presentation_type in ('textbox','textarea','radiobutton','checkbox','select','pop-up_date','typed_date','image_map','file_upload')),
	choice_orientation	varchar(25)
			constraint as_item_display_types_choice_orientation_nn
			not null,
			constraint as_item_display_types_choice_orientation_ck
			check (choice_orientation in ('horizontal','vertical','matrix_col-row','matrix_row-col')),
	item_choice_alignment	varchar(25)
			constraint as_item_display_types_item_choice_alignment_nn
			not null,
			constraint as_item_display_types_item_choice_alignment_ck
			check (item_choice_alignment in ('beside_left','beside_right','below','above')),
	-- field to specify other stuff like textarea dimensions ("rows=10 cols=50" eg)
	display_options	varchar(500)
);

create table as_items (
	-- NOTE should it be an acs_object? What about using CR?
	item_id		integer
			constraint as_item_item_id_pk
                        primary key,
        item_type_id    integer
			constraint as_item_item_type_id_fk
                        references as_item_types (item_type_id),
	item_display_type_id integer
			constraint as_item_item_display_type_id_fk
			references as_item_display_types (item_display_type_id),
	-- NOTE Is this correct?
	-- locale that is used for the item within this table (as_items). For additional locales, check as_item_locale
	default_locale	varchar(30),
	-- some phrase used in admin UIs
	name		varchar(500)
                        constraint as_item_name_nn
                        not null,
	-- the primary "label" attached to an Item display
	item_text	varchar(500),
	-- a secondary label, needed for many kinds of questions
	item_subtext	varchar(500),
	-- a short label for use in data output header rows, etc
	field_code	varchar(500),
	-- some descriptive text
	definition	varchar(500),
	-- whether Item is released for actual use
	enabled_p	char(1) default 'f'
			constraint as_item_enabled_p_ck
			check (enabled_p in ('t','f')),
	-- whether Item must be answered (default value, can be overriden)
	required_p	char(1) default 'f'
			constraint as_item_required_p_ck
			check (required_p in ('t','f')),
	-- NOTE Is this correct?
	-- optional field that sets what the Item will display when first output (eg text in a textbox; eg the defaults that ad_dateentrywidget expects: "" for "no date", "0" for "today", or else some specific date set by the author; see  this example)
	item_default	varchar(500),
	-- optional max number of seconds to perform Item
	max_time_to_complete	integer,
	-- NOTE Is this correct?
	-- a denormalization to cache the generated "widget" for the Item (NB: when any change is made to an as_item_choice related to an as_item, this will have to be updated!)
	adp_chunk	varchar(500)
);

create table as_item_localized (
	item_id		integer
			constraint as_item_localized_item_id_fk
			references as_items (item_id),
	locale		varchar(30)
			constraint as_item_localized_locale_nn
                        not null,
	-- the primary "label" attached to an Item display
	item_text	varchar(500),
	-- a secondary label, needed for many kinds of questions
	item_subtext	varchar(500),
	-- some descriptive text
	definition	varchar(500),
	-- optional text displayed on user pages
	instructions	varchar(500)
);

create table as_item_attributes (
	item_id		integer
			constraint as_item_attributes_item_id_fk
                        references as_items (item_id),
	attribute_id	integer
			constraint as_item_attributes_attribute_id_fk
                        references as_item_type_attributes (attribute_id),
	-- NOTE Is this correct?
	-- which of the value columns has the information this Choice conveys
	data_type	integer,
	-- we can stuff both integers and real numbers here - this is where "points" could be stored for each Choice
        numeric_value   numeric,
	text_value	varchar(500),
	boolean_value	boolean,
	-- references an item in the CR -- for an image, audio file, or video file
	content_value	integer
			constraint as_item_choice_content_value_fk
                        references cr_revisions
);

create table as_item_choices (
	choice_id       integer
                        constraint as_item_choice_id_pk
                        primary key,
        name            varchar(500),
	-- what is displayed in the choices "label"
        choice_text     varchar(500),
	-- NOTE Is this correct?
	-- which of the value columns has the information this Choice conveys
	data_type	integer,
	-- we can stuff both integers and real numbers here - this is where "points" could be stored for each Choice
        -- might be useful for averaging or whatever, generally null
        numeric_value   numeric,
	text_value	varchar(500),
	boolean_value	boolean,
	-- references an item in the CR -- for an image, audio file, or video file
	content_value	integer
			constraint as_item_choice_content_value_fk
                        references cr_revisions,
	-- where optionally some preset feedback can be specified by the author
	feedback_text	varchar(500)
);

create table as_item_choice_map (
	item_id		integer
		constraint as_item_choice_map_item_id_fk
		references as_items (item_id),
	choice_id	integer
		constraint as_item_choice_map_choice_id_fk
		references as_item_choices (choice_id),
	sort_order	integer
);


create table as_section_display_types (
	section_display_type_id	integer
				constraint as_section_display_types_id_pk
				primary key,
	section_type_name	varchar(25),
	pagination_style	varchar(25)
				constraint as_section_display_types_pagination_style_nn
				not null,
	branched_p		char(1) default 'f'
				constraint as_section_display_types_branched_p_ck
				check (branched_p in ('t','f')),
	item_orientation	varchar(25) default 'horizontal'
				constraint as_section_display_types_item_orientation_ck
				check (item_orientation in ('horizontal','vertical','matrix_col-row','matrix_row-col')),
	item_labels_as_headers_p char(1) default 't'
				 constraint as_section_display_types_item_labels_as_headers_p_ck
				 check (item_labels_as_headers_p in ('t','f')),
	-- May actually be superfluous
	presentation_type	varchar(25),
	item_aligment		varchar(25)
				constraint as_section_display_types_ck
				check (item_aligment in ('beside_left','beside_right','below','above')),
	display_options		varchar(25)
);

-- Represents logically-grouped set of items 
create table as_sections (
	section_id	integer
			constraint as_sections_section_id_pk
			primary key,
	section_display_type_id	integer
				constraint as_sections_section_display_type_id_fk
				references as_section_display_types (section_display_type_id),
	name		varchar(500),
	definition	text
			constraint as_sections_definition_nn
			not null,
	instructions	text,
	enable_p	char(1) default 'f'
			constraint as_sections_enable_p_ck
			check (enable_p in ('t','f')), 
	-- Maybe this isnt really useful
	required_p	char(1) default 't'
			constraint as_sections_required_p_ck
			check (required_p in ('t','f')), 
	-- References an item in the CR
	content_value	integer,
	numeric_value	integer,
	feedback_text	text,
	max_time_tp_complete	integer
);

-- Are the highest-level container in the hierarchical structure
-- They define the key by which all other entities are assembled into meaningful order during:
-- display, processing and retrieval of Assessment information
create table as_assessments (
	-- A revision_id inherited from cr_revisions
	assessment_id	integer
			constraint as_assessments_assessment_id_pk
			primary key,
	name	varchar(500),
	short_name	varchar(500),
	author	varchar(500),
	definition	text,
	instructions	text,
	scaled_p	char(1) default 'f'
			constraint as_assessments_scaled_p_ck
			check (scaled_p in ('t','f')),
	mode	varchar(25),
	validate_p	char(1) default 'f'
			constraint as_assessments_validate_p_ck
			check (validate_p in ('t','f')),
	enable_p	char(1) default 'f'
			constraint as_assessments_enable_p_ck
			check (enable_p in ('t','f')),
	editable_p	char(1) default 'f'
			constraint as_assessments_editable_p_ck
			check (editable_p in ('t','f')),
	as_template	integer
);

create table as_assessment_section_map (
	assessment_id	integer
			constraint as_assessment_section_map_assessment_id_fk
			references as_assessments (assessment_id),
	section_id	integer
			constraint as_assessment_section_map_section_id_fk
			references as_sections (section_id),
	feedback_text	text,
	max_time_to_complete	integer,
	sort_order	integer
);

-- Defines the items of a section
create table as_item_section_map (
	item_id	integer
		constraint as_item_section_map_item_id_fk
		references as_items (item_id),
	section_id	integer
			constraint as_item_section_map_section_id_fk
			references as_sections (section_id),
	enabled_p	char(1) default 't'
			constraint as_item_section_map_enabled_p_ck
			check (enabled_p in ('t','f')),
	required_p	char(1) default 'f'
			constraint as_item_section_map_required_p_ck
			check (required_p in ('t','f')),
	item_default	integer,
	content_value	integer,
	numeric_value	integer,
	feedback_text	text,
	max_time_to_complete	integer,
	adp_chunk	varchar(25),
	sort_order	integer
);