-- Drop redundant indexes (already covered by UNIQUE constraints)
DROP INDEX IF EXISTS idx_users_username;
DROP INDEX IF EXISTS idx_user_libraries_user_id;

-- Add missing indexes for comments table
CREATE INDEX IF NOT EXISTS idx_comments_media ON comments(media_id);
CREATE INDEX IF NOT EXISTS idx_comments_parent ON comments(parent_comment_id);

-- Remove duplicates before adding unique index (keep the first row)
DELETE FROM external_metadata
WHERE rowid NOT IN (
    SELECT MIN(rowid)
    FROM external_metadata
    GROUP BY media_id, source
);

-- Add unique index for external_metadata to prevent duplicates
CREATE UNIQUE INDEX IF NOT EXISTS uq_external_metadata_source ON external_metadata(media_id, source);