-- Step 1, fetch data from strapi database and copy it to futureporn database via dblink
--         we store the data in futureporn database under public_strapi_old schema
-- We did this step manually using pgadmin4 so it's not part of this sql


-- Step 2, transform data from public_strapi_old to match the up-to-date api schema
-- There are a lot of deprecated tables in the Strapi db, so what we do is we copy and transform only what we need.
SELECT dblink_disconnect('old_db_conn');
SELECT dblink_connect(
    'old_db_conn',
    'dbname=futureporn_strapi_old user=postgres passfile=/tmp/.pgpass'
);


-- Migrate vods table
INSERT INTO api.vods (
    id,
    id_old,
    stream_id,
    created_at,
    updated_at,
    title, 
    date, 
    note, 
    ipfs_cid,
    s3_file,
    announce_title, 
    announce_url, 
    status
)
SELECT
    gen_random_uuid(),
    vods.id,
    NULL,
    vods.created_at,
    vods.updated_at,
    vods.title,
    vods.date::date,
    vods.note,
    vods.video_src_hash,
    NULL, -- old vods doesn't contain this info-- the join table is needed
    vods.announce_title,
    vods.announce_url,
    'pending_recording'
FROM
    dblink('old_db_conn', 'SELECT * FROM public.vods') AS vods (
        id integer, 
        video_src_hash character varying, 
        video_720_hash character varying, 
        video_480_hash character varying, 
        video_360_hash character varying, 
        video_240_hash character varying, 
        thin_hash character varying, 
        thicc_hash character varying, 
        announce_title character varying, 
        announce_url character varying, 
        note text, 
        date timestamp(6) without time zone, 
        spoilers text, 
        created_at timestamp(6) without time zone, 
        updated_at timestamp(6) without time zone, 
        published_at timestamp(6) without time zone, 
        created_by_id integer, 
        updated_by_id integer, 
        title character varying, 
        chat_log text, 
        date_2 character varying, 
        cuid character varying, 
        archive_status character varying
    )
    LEFT JOIN (
        -- Fetching vods_vtuber_links from the old database
        SELECT * 
        FROM dblink('old_db_conn', 'SELECT vod_id, vtuber_id FROM public.vods_vtuber_links') AS links (
            vod_id integer,
            vtuber_id integer
        )
    ) AS links ON vods.id = links.vod_id
    LEFT JOIN api.vtubers AS vtubers
        ON links.vtuber_id = vtubers.id_old;  -- Map the old `vtuber_id` to the new `uuid` in `vtubers`