-- Unified lifecycle metadata for account-owned resources.
-- A deleted row remains recoverable during the configured retention window.
ALTER TABLE users
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT,
    ADD COLUMN IF NOT EXISTS deletion_reason TEXT,
    ADD COLUMN IF NOT EXISTS deleted_by BIGINT REFERENCES users(id) ON DELETE SET NULL,
    ADD COLUMN IF NOT EXISTS restored_at TIMESTAMPTZ,
    ADD COLUMN IF NOT EXISTS restored_by BIGINT REFERENCES users(id) ON DELETE SET NULL;

ALTER TABLE rooms
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT,
    ADD COLUMN IF NOT EXISTS deleted_owner_id BIGINT REFERENCES users(id) ON DELETE CASCADE;

ALTER TABLE playlists
    ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ,
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT,
    ADD COLUMN IF NOT EXISTS deleted_owner_id BIGINT REFERENCES users(id) ON DELETE CASCADE;

ALTER TABLE media
    ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ,
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT,
    ADD COLUMN IF NOT EXISTS deleted_owner_id BIGINT REFERENCES users(id) ON DELETE CASCADE;

ALTER TABLE chat_messages
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT,
    ADD COLUMN IF NOT EXISTS deleted_owner_id BIGINT REFERENCES users(id) ON DELETE CASCADE;

ALTER TABLE auth_email_identities
    ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ,
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT;

ALTER TABLE auth_oauth2_identities
    ADD COLUMN IF NOT EXISTS deleted_at TIMESTAMPTZ,
    ADD COLUMN IF NOT EXISTS deletion_source SMALLINT;

-- Existing table-level uniqueness prevents a deleted identity from releasing
-- its email/provider subject. Replace it with active-row partial indexes.
ALTER TABLE auth_oauth2_identities
    DROP CONSTRAINT IF EXISTS auth_oauth2_identities_instance_subject_unique;

DROP INDEX IF EXISTS idx_auth_email_identities_email_lower;
CREATE UNIQUE INDEX IF NOT EXISTS idx_auth_email_identities_email_lower_active
    ON auth_email_identities(LOWER(email)) WHERE deleted_at IS NULL;
CREATE UNIQUE INDEX IF NOT EXISTS idx_auth_oauth2_identities_instance_subject_active
    ON auth_oauth2_identities(provider_instance_name, provider_user_id)
    WHERE deleted_at IS NULL;

CREATE INDEX IF NOT EXISTS idx_users_deleted_at_source
    ON users(deleted_at, deletion_source) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_rooms_deletion_source
    ON rooms(deletion_source, deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_rooms_deleted_owner
    ON rooms(deleted_owner_id) WHERE deleted_owner_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_playlists_deleted_at
    ON playlists(deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_playlists_deletion_source
    ON playlists(deletion_source, deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_playlists_deleted_owner
    ON playlists(deleted_owner_id) WHERE deleted_owner_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_media_deleted_at
    ON media(deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_media_deletion_source
    ON media(deletion_source, deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_media_deleted_owner
    ON media(deleted_owner_id) WHERE deleted_owner_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_chat_messages_deletion_source
    ON chat_messages(deletion_source, deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_chat_messages_deleted_owner
    ON chat_messages(deleted_owner_id) WHERE deleted_owner_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_auth_email_identities_deleted_at
    ON auth_email_identities(deleted_at) WHERE deleted_at IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_auth_oauth2_identities_deleted_at
    ON auth_oauth2_identities(deleted_at) WHERE deleted_at IS NOT NULL;