-- ============================================================================
--  mediabox — Plex library path remap:  Windows UNC  ->  Linux mount paths
--
--  RUN WITH "Plex SQLite", NOT stock sqlite3.
--      Plex ships its own SQLite build with specific compile options.
--      Windows: "C:\Program Files\Plex\Plex Media Server\Plex SQLite.exe"
--      Linux:   /usr/lib/plexmediaserver/Plex\ SQLite
--      Stock sqlite3 may refuse to open it, or worse, open it and corrupt it.
--
--  RUN ON A COPY. Never against a database a server has open. Use either a
--  copy taken from a cleanly STOPPED server, or one of Plex's own dated
--  backups (com.plexapp.plugins.library.db-YYYY-MM-DD), which are already
--  consistent snapshots.
--
--  ---------------------------------------------------------------------------
--  VERIFIED AGAINST THE LIVE LIBRARY 2026-07-27
--
--  Every text column in all 82 tables was scanned for the string 'korval'.
--  Six columns matched. Only FOUR of them are paths:
--
--      media_parts.file             80,126 rows   backslash / UNC form
--      section_locations.root_path      11 rows   backslash / UNC form
--      media_streams.url            14,837 rows   file:// form, %20-encoded
--      metadata_items.guid               9 rows   file:// form, %20-encoded
--
--  TWO COLUMNS MATCH THE WORD BUT ARE NOT PATHS AND MUST NEVER BE TOUCHED:
--
--      taggings.text            1 row  — "Dr. Korval", a credited person
--      metadata_items.summary   4 rows — Liaden Universe book blurbs that
--                                        mention "Clan Korval"
--
--  This is why every statement below is anchored to a PATH PREFIX
--  ('\\korval\' or 'file://korval/') and never to the bare word. A naive
--  REPLACE(col,'korval',...) across matching columns would silently corrupt
--  four book summaries and a cast credit.
--  ---------------------------------------------------------------------------
--
--  MOUNT CONTRACT — this SQL assumes each NAS share is mounted at
--  /mnt/nas/<exact share name>, capitalisation and spaces preserved:
--
--      //10.0.1.254/media             -> /mnt/nas/media
--      //10.0.1.254/Radio Shows       -> /mnt/nas/Radio Shows
--      //10.0.1.254/Education Videos  -> /mnt/nas/Education Videos
--      //10.0.1.254/Health            -> /mnt/nas/Health
--      //10.0.1.254/Home Movies       -> /mnt/nas/Home Movies
--      //10.0.1.254/Pictures          -> /mnt/nas/Pictures
--
--  Keeping the share names verbatim is what reduces this to one uniform
--  prefix substitution per format instead of eleven special cases. The same
--  paths must be bind-mounted into the container at the same location, so the
--  database and the container agree with no further translation.
-- ============================================================================

PRAGMA foreign_keys = OFF;

BEGIN TRANSACTION;

-- ---------------------------------------------------------------------------
--  1. Drop the two vestigial library roots.
--
--  '\\korval\Audio Books' and '\\korval\Music Organized' are configured as
--  library roots but contain ZERO files — all audio actually lives under
--  \\korval\media\audiobooks and \\korval\media\music. Verified 2026-07-27:
--  0 files / 0 bytes under both.
--
--  The NOT EXISTS guard makes this a no-op if that ever stops being true, so
--  this statement can never orphan a media_parts row.
-- ---------------------------------------------------------------------------
DELETE FROM section_locations
WHERE root_path IN ('\\korval\Audio Books', '\\korval\Music Organized')
  AND NOT EXISTS (
        SELECT 1
        FROM media_parts mp
        WHERE mp.file LIKE section_locations.root_path || '\%'
      );

-- ---------------------------------------------------------------------------
--  2. Backslash / UNC form.
--
--  \\korval\media\movies\Film (2019)\Film.mkv
--      -> /mnt/nas/media/movies/Film (2019)/Film.mkv
--
--  Order matters: swap the '\\korval\' prefix FIRST, then convert the
--  remaining separators. Doing it the other way round destroys the prefix
--  before it can be matched.
--
--  Spaces stay literal in this form — fstab needs \040 escaping, the database
--  does not.
-- ---------------------------------------------------------------------------
UPDATE section_locations
SET root_path = REPLACE(REPLACE(root_path, '\\korval\', '/mnt/nas/'), '\', '/')
WHERE root_path LIKE '\\korval\%';

UPDATE media_parts
SET file = REPLACE(REPLACE(file, '\\korval\', '/mnt/nas/'), '\', '/')
WHERE file LIKE '\\korval\%';

-- ---------------------------------------------------------------------------
--  3. file:// URL form.
--
--  file://korval/media/tvshows/Person%20of%20Interest/...
--      -> file:///mnt/nas/media/tvshows/Person%20of%20Interest/...
--
--  Note the THIRD slash: 'file://korval/' is a host-qualified URL; a local
--  path is 'file:///'. Separators are already forward slashes here, so no
--  second REPLACE.
--
--  %20 IS LEFT ALONE ON PURPOSE. Plex URL-decodes these, so decoding them
--  here would produce paths with literal '%20' in them and break every
--  subtitle and stream reference that has a space in its name — which, given
--  share names like "Radio Shows" and "Home Movies", is most of them.
-- ---------------------------------------------------------------------------
UPDATE media_streams
SET url = REPLACE(url, 'file://korval/', 'file:///mnt/nas/')
WHERE url LIKE 'file://korval/%';

UPDATE metadata_items
SET guid = REPLACE(guid, 'file://korval/', 'file:///mnt/nas/')
WHERE guid LIKE 'file://korval/%';

COMMIT;

PRAGMA foreign_keys = ON;

-- Reclaim the space freed by the rewrite and leave the file tidy for its
-- first open by the new server. Safe, but slow on a 513 MB database — expect
-- a minute or two.
VACUUM;