CREATE INDEX ix_chores_log_performance1 ON chores_log (
	chore_id,
	undone,
	tracked_time
);

CREATE VIEW chores_execution_timeline
AS

SELECT
	cl.chore_id,
	cl.tracked_time,
	(SELECT tracked_time FROM chores_log WHERE chore_id = cl.chore_id AND undone = 0 AND tracked_time < cl.tracked_time ORDER BY tracked_time DESC LIMIT 1) AS tracked_time_before,
	CAST((JULIANDAY(cl.tracked_time) - JULIANDAY((SELECT tracked_time FROM chores_log WHERE chore_id = cl.chore_id AND undone = 0 AND tracked_time < cl.tracked_time ORDER BY tracked_time DESC LIMIT 1))) * 24 AS INT) AS frequency_hours
FROM chores_log cl
WHERE cl.undone = 0;

CREATE VIEW chores_execution_average_frequency
AS

SELECT
	cet.chore_id,
	AVG(cet.frequency_hours) AS average_frequency_hours
FROM chores_execution_timeline cet
GROUP BY cet.chore_id;

DROP VIEW chores_current;
CREATE VIEW chores_current
AS
SELECT
	x.chore_id AS id, -- Dummy, LessQL needs an id column
	x.chore_id,
	x.chore_name,
	x.last_tracked_time,
	CASE WHEN x.rollover = 1 AND DATETIME('now', 'localtime') > x.next_estimated_execution_time THEN
		CASE WHEN IFNULL(x.track_date_only, 0) = 1 THEN
			DATETIME(STRFTIME('%Y-%m-%d', DATETIME('now', 'localtime')) || ' 23:59:59')
		ELSE
			DATETIME(STRFTIME('%Y-%m-%d', DATETIME('now', 'localtime')) || ' ' || STRFTIME('%H:%M:%S', x.next_estimated_execution_time))
		END
	ELSE
		CASE WHEN IFNULL(x.track_date_only, 0) = 1 THEN
			DATETIME(STRFTIME('%Y-%m-%d', x.next_estimated_execution_time) || ' 23:59:59')
		ELSE
			x.next_estimated_execution_time
		END
	END AS next_estimated_execution_time,
	x.track_date_only,
	x.next_execution_assigned_to_user_id
FROM (

SELECT
	h.id AS chore_id,
	h.name AS chore_name,
	MAX(l.tracked_time) AS last_tracked_time,
	CASE WHEN MAX(l.tracked_time) IS NULL THEN
		h.start_date
	ELSE
		CASE h.period_type
			WHEN 'manually' THEN '2999-12-31 23:59:59'
			WHEN 'hourly' THEN DATETIME(MAX(l.tracked_time), '+' || CAST(h.period_interval AS TEXT) || ' hour')
			WHEN 'daily' THEN DATETIME(MAX(l.tracked_time), '+' || CAST(h.period_interval AS TEXT) || ' day')
			WHEN 'weekly' THEN (
				SELECT next
					FROM (
					SELECT 'sunday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 0') AS next
					UNION
					SELECT 'monday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 1') AS next
					UNION
					SELECT 'tuesday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 2') AS next
					UNION
					SELECT 'wednesday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 3') AS next
					UNION
					SELECT 'thursday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 4') AS next
					UNION
					SELECT 'friday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 5') AS next
					UNION
					SELECT 'saturday' AS day, DATETIME((SELECT tracked_time FROM chores_log WHERE chore_id = h.id ORDER BY tracked_time DESC LIMIT 1), '1 days', '+' || CAST((h.period_interval - 1) * 7 AS TEXT) || ' days', 'weekday 6') AS next
				)
				WHERE INSTR(period_config, day) > 0
				ORDER BY next
				LIMIT 1
			)
			WHEN 'monthly' THEN DATETIME(MAX(l.tracked_time), 'start of month', '+' || CAST(h.period_interval AS TEXT) || ' month', '+' || CAST(h.period_days - 1 AS TEXT) || ' day')
			WHEN 'yearly' THEN DATETIME(SUBSTR(CAST(DATETIME(MAX(l.tracked_time), '+' || CAST(h.period_interval AS TEXT) || ' years') AS TEXT), 1, 4) || SUBSTR(CAST(h.start_date AS TEXT), 5, 6) || SUBSTR(CAST(DATETIME(MAX(l.tracked_time), '+' || CAST(h.period_interval AS TEXT) || ' years') AS TEXT), -9))
			WHEN 'adaptive' THEN DATETIME(MAX(l.tracked_time), '+' || CAST(IFNULL((SELECT average_frequency_hours FROM chores_execution_average_frequency WHERE chore_id = h.id), 0) AS TEXT) || ' hour')
		END
	END AS next_estimated_execution_time,
	h.track_date_only,
	h.rollover,
	h.next_execution_assigned_to_user_id
FROM chores h
LEFT JOIN chores_log l
	ON h.id = l.chore_id
	AND l.undone = 0
WHERE h.active = 1
GROUP BY h.id, h.name, h.period_days
) x;