--
-- What's the latest show today?
--

SELECT concat('Latest show number on this date: ',curdate()) AS '';

SELECT max(id) AS latest_show
FROM eps
WHERE date <= curdate();

-- -----------------------------------------------------------------------------
-- How many hosts are there up to and including today? Note there are 49 hosts
-- with no shows at all, imported from the TWAT data, so a simple count of
-- rows is not going to be correct.
--

SELECT count(*) AS total_users_to_today
FROM
  ( SELECT e.id
   FROM hosts h,
        eps e
   WHERE e.hostid = h.hostid
     AND e.date <= curdate()
   GROUP BY h.host) AS ttab;

--
-- How many new hosts are there in the (future) queue?
--

SELECT h.host AS upcoming_new_host,
       min(e.date) AS joindate
FROM hosts h,
     eps e
WHERE e.hostid = h.hostid
GROUP BY h.host
HAVING min(e.date) > curdate();

-- -----------------------------------------------------------------------------
-- Find all new hosts who joined in the last year (ignoring those with queued
-- shows in the future)
--

SELECT 'Hosts joining in the last year with number of shows done' AS '';

SELECT h.hostid,
       h.host,
       min(e.date) AS joindate,
       count(e.id) AS COUNT
FROM eps e
JOIN hosts h ON e.hostid = h.hostid
GROUP BY h.hostid
HAVING min(e.date) >= (curdate() - INTERVAL 364 DAY)
AND min(e.date) <= curdate()
ORDER BY min(e.date);

SELECT COUNT(*) AS new_host_count,
            sum(COUNT) AS total_shows
FROM
  ( SELECT h.hostid,
           h.host,
           min(e.date) AS joindate,
                          count(e.id) AS COUNT
   FROM eps e
   JOIN hosts h ON e.hostid = h.hostid
   GROUP BY h.hostid
   HAVING min(e.date) >= (curdate() - INTERVAL 364 DAY)
   AND min(e.date) <= curdate()
   ORDER BY min(e.date)) src;

-- -----------------------------------------------------------------------------
-- Display all hosts contributing > 10 shows in the last year then count the
-- number of shows
--

SELECT 'Hosts contributing > 10 shows in the last year' AS '';

SELECT e.hostid,
       h.host,
       COUNT(e.hostid) AS shows
FROM eps e
JOIN hosts h ON e.hostid = h.hostid
WHERE e.date <= curdate()
  AND e.date >= (curdate() - interval 364 DAY)
GROUP BY e.hostid
HAVING COUNT(e.hostid) > 10
ORDER BY COUNT(e.hostid) DESC;


SELECT COUNT(*) AS no_of_hosts,
            sum(shows) AS sum_of_shows_by_group
FROM
  ( SELECT e.hostid,
           h.host,
           COUNT(e.hostid) AS shows
   FROM eps e
   JOIN hosts h ON e.hostid = h.hostid
   WHERE e.date <= curdate()
     AND e.date >= (curdate() - interval 364 DAY)
   GROUP BY e.hostid
   HAVING COUNT(e.hostid) > 10
   ORDER BY COUNT(e.hostid) DESC) AS ttab;

--
-- Display all hosts contributing > 5 shows in the last year then count the
-- number of shows. Remember this includes the > 10 group too!
--

SELECT 'Hosts contributing > 5 shows in the last year' AS '';

SELECT e.hostid,
       h.host,
       COUNT(e.hostid) AS shows
FROM eps e
JOIN hosts h ON e.hostid = h.hostid
WHERE e.date <= curdate()
  AND e.date >= (curdate() - interval 364 DAY)
GROUP BY e.hostid
HAVING COUNT(e.hostid) > 5
ORDER BY COUNT(e.hostid) DESC;


SELECT COUNT(*) AS no_of_hosts,
            sum(shows) AS sum_of_shows_by_group
FROM
  ( SELECT e.hostid,
           h.host,
           COUNT(e.hostid) AS shows
   FROM eps e
   JOIN hosts h ON e.hostid = h.hostid
   WHERE e.date <= curdate()
     AND e.date >= (curdate() - interval 364 DAY)
   GROUP BY e.hostid
   HAVING COUNT(e.hostid) > 5
   ORDER BY COUNT(e.hostid) DESC) AS ttab;

--
-- How many hosts contributed shows in the last year
--

SELECT 'Number of hosts contributing shows in the last year' AS '';


SELECT COUNT(*) AS hosts_contributing_last_year,
            sum(shows) AS sum_of_shows_by_group
FROM
  ( SELECT e.hostid,
           h.host,
           COUNT(e.hostid) AS shows
   FROM eps e
   JOIN hosts h ON e.hostid = h.hostid
   WHERE e.date <= curdate()
     AND e.date >= (curdate() - interval 364 DAY)
   GROUP BY e.hostid
   ORDER BY COUNT(e.hostid) DESC ) AS hly;

-- -----------------------------------------------------------------------------
-- How many new hosts were there per year and how many shows have they
-- contributed overall?
--

SELECT 'Hosts per year and their contributions' AS '';

SELECT joinyear,
       COUNT(*) AS new_hosts,
            sum(shows) AS shows
FROM
  ( SELECT extract(YEAR
                   FROM min(e.date)) AS joinyear,
           count(e.id) AS shows
   FROM eps e
   JOIN hosts h ON e.hostid = h.hostid
   WHERE e.date <= curdate()
   GROUP BY h.hostid
   ORDER BY min(e.date)) AS ttab
GROUP BY joinyear;

-- -----------------------------------------------------------------------------
-- Hosts who joined, did a show but haven't been seen since January of the
-- year 3 years ago.
--

SELECT 'Hosts not seen for the past three years' AS '';

SELECT COUNT(*) AS departed_hosts
FROM
  ( SELECT h.hostid,
           h.host,
           min(e.date) AS joindate,
                          max(e.date) AS lastshow,
                                         count(e.id) AS shows
   FROM eps e
   JOIN hosts h ON e.hostid = h.hostid
   WHERE e.date <= curdate()
   GROUP BY h.hostid
   HAVING lastshow < date_format(date_sub(curdate(),INTERVAL 3 YEAR),'%Y-01-01')
   ORDER BY shows,
            min(e.date)) ttab;

-- -----------------------------------------------------------------------------
-- Show hosts and shows per month throughout the HPR history
--

SELECT 'Hosts and shows per month throughout the HPR history' AS '';

SELECT extract(year_month
               FROM e.date) AS MONTH,
       COUNT(e.id) AS shows,
            COUNT(DISTINCT e.hostid) AS hosts
FROM eps e
WHERE e.date < date_format(curdate(),"%Y-%c-01")
GROUP BY MONTH;