USE CanvasWarehouse
GO

IF 
	OBJECT_ID(N'[dbo].[Canvas-enrollment_dim-staging]', N'U') IS NOT NULL
BEGIN
	DROP TABLE [dbo].[Canvas-enrollment_dim-staging]
END
;

CREATE TABLE [dbo].[Canvas-enrollment_dim-staging]
(
	id bigint NOT NULL
	, canvas_id bigint NOT NULL
	, root_account_id bigint NOT NULL
	, course_section_id bigint NOT NULL
	, role_id bigint NOT NULL
	, type varchar(256) NOT NULL
	, workflow_state varchar(256) NOT NULL
	, created_at varchar(max) NOT NULL
	, updated_at varchar(max) NOT NULL
	, start_at varchar(max) NULL
	, end_at varchar(max) NULL
	, completed_at varchar(max) NULL
	, self_enrolled varchar(5) NOT NULL
	, sis_source_id varchar(256) NULL
	, course_id bigint NOT NULL
	, user_id bigint NOT NULL
	, last_activity_at varchar(max) NULL
)
GO

BULK INSERT [dbo].[Canvas-enrollment_dim-staging]
FROM
	'G:\Canvas\unpackedFiles\enrollment_dim.txt'
WITH
	(
		FIRSTROW = 2
		, FIELDTERMINATOR = '\t'
		--, ROWTERMINATOR = '\r\n'
		-- This is due to unix encoding, the row terminator is not \n
		, ROWTERMINATOR = '0x0A'
		, KEEPNULLS
	)
GO

IF 
	OBJECT_ID(N'[dbo].[Canvas-enrollment_dim]', N'U') IS NOT NULL
BEGIN
	DROP TABLE [dbo].[Canvas-enrollment_dim]
END
;

CREATE TABLE [dbo].[Canvas-enrollment_dim]
(
	id bigint NOT NULL
	, canvas_id bigint NOT NULL
--	, root_account_id bigint NOT NULL
	, course_section_id bigint NOT NULL
	, role_id bigint NOT NULL
	, type varchar(256) NOT NULL
	, workflow_state varchar(256) NOT NULL
	, created_at datetime NOT NULL
	, updated_at datetime NOT NULL
--	, start_at datetime NULL
--	, end_at datetime NULL
--	, completed_at datetime NULL
	, self_enrolled bit NOT NULL
--	, sis_source_id varchar(256) NULL
	, course_id bigint NOT NULL
	, user_id bigint NOT NULL
	, last_activity_at datetime NULL
)
GO

INSERT INTO [dbo].[Canvas-enrollment_dim]
SELECT
	id
	, canvas_id
--	, root_account_id
	, course_section_id
	, role_id
	, type
	, workflow_state
	, CASE
		WHEN created_at IS NULL THEN NULL
		WHEN LEFT(created_at, 4) < 1900 THEN NULL
		ELSE CAST(created_at AS datetime)
		END as created_at
	, CASE
		WHEN updated_at IS NULL THEN NULL
		WHEN LEFT(updated_at, 4) < 1900 THEN NULL
		ELSE CAST(updated_at AS datetime)
		END as updated_at
--	, CASE
--		WHEN start_at IS NULL THEN NULL
--		WHEN LEFT(start_at, 4) < 1900 THEN NULL
--		ELSE CAST(start_at AS datetime)
--		END as start_at
--	, CASE
--		WHEN end_at IS NULL THEN NULL
--		WHEN LEFT(end_at, 4) < 1900 THEN NULL
--		ELSE CAST(end_at AS datetime)
--		END as end_at
--	, CASE
--		WHEN completed_at IS NULL THEN NULL
--		WHEN LEFT(completed_at, 4) < 1900 THEN NULL
--		ELSE CAST(completed_at AS datetime)
--		END as completed_at
	, CAST(
		CASE
			WHEN self_enrolled = 'true' THEN 1
			WHEN self_enrolled = 'false' THEN 0
			ELSE NULL
			END as bit
		) as self_enrolled
--	, sis_source_id
	, course_id
	, user_id
	, CASE
		WHEN last_activity_at IS NULL THEN NULL
		WHEN last_activity_at LIKE '%' + CHAR(10) + '%' THEN NULL
		WHEN last_activity_at LIKE '%' + CHAR(13) + '%' THEN NULL
		WHEN LEFT(last_activity_at, 4) < 1900 THEN NULL
		ELSE CAST(last_activity_at AS datetime)
		END as last_activity_at
FROM
	[dbo].[Canvas-enrollment_dim-staging]

IF 
	OBJECT_ID(N'[dbo].[Canvas-enrollment_dim-staging]', N'U') IS NOT NULL
BEGIN
	DROP TABLE [dbo].[Canvas-enrollment_dim-staging]
END
;