-- 010_linkedin_url.sql
-- Persist the public LinkedIn profile URL extracted from a CV at ingest time
-- on users, manual_upload_candidate, and candidates. Fetch reads this column
-- instead of re-parsing resume text. Applied at startup by
-- alembic_setup.run_manual_sql().

ALTER TABLE app.users
    ADD COLUMN IF NOT EXISTS linkedin_url TEXT;

ALTER TABLE app.manual_upload_candidate
    ADD COLUMN IF NOT EXISTS linkedin_url TEXT;

ALTER TABLE app.candidates
    ADD COLUMN IF NOT EXISTS linkedin_url TEXT;

-- Backfill from already-extracted /in/<slug> values.
UPDATE app.manual_upload_candidate
SET linkedin_url = 'https://www.linkedin.com/in/' || linkedin_slug
WHERE linkedin_url IS NULL
  AND linkedin_slug IS NOT NULL
  AND linkedin_slug <> '';

UPDATE app.users AS u
SET linkedin_url = m.linkedin_url
FROM app.manual_upload_candidate AS m
WHERE u.id = m.user_id
  AND u.linkedin_url IS NULL
  AND m.linkedin_url IS NOT NULL
  AND m.linkedin_url <> '';

UPDATE app.users AS u
SET linkedin_url = 'https://www.linkedin.com/in/' || m.linkedin_slug
FROM app.inbox AS i
JOIN app.inbox_messages AS m ON m.id = i.message_id
WHERE i.user_id = u.id
  AND u.linkedin_url IS NULL
  AND m.linkedin_slug IS NOT NULL
  AND m.linkedin_slug <> '';