// Global prompts only. No private templates, Memories, or credential settings.
exports.up = pgm => {
  pgm.sql(`
    CREATE TABLE prompt_revisions (
      id SERIAL PRIMARY KEY,
      prompt_key TEXT NOT NULL CHECK (prompt_key IN (
        'prompt.hpiEncounter',
        'prompt.hpiDictation',
        'prompt.hpiInpatient',
        'prompt.hospitalCourseShort',
        'prompt.hospitalCourseLong',
        'prompt.hospitalCourseICU',
        'prompt.hospitalCoursePsych',
        'prompt.chartReviewOutpatient',
        'prompt.chartReviewSubspecialty',
        'prompt.chartReviewED',
        'prompt.soapFull',
        'prompt.soapSubjective',
        'prompt.milestoneNarrative',
        'prompt.milestoneList',
        'prompt.milestoneSummary',
        'prompt.peGuideNarrative',
        'prompt.peGuideList',
        'prompt.refine',
        'prompt.shortenDocument',
        'prompt.askClarification',
        'prompt.shadessAssessment',
        'prompt.wellVisitNote',
        'prompt.wellVisitShort',
        'prompt.sickVisitNote',
        'prompt.edEncounterStaged',
        'prompt.edConsolidate',
        'prompt.edFinalize',
        'prompt.dontMissTooltip',
        'prompt.patientEducation',
        'clinical_assistant.system_behavior',
        'clinical_assistant.image_behavior'
      )),
      value TEXT NOT NULL,
      was_default BOOLEAN NOT NULL,
      created_by INTEGER,
      created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
      restored_from INTEGER,
      UNIQUE (prompt_key, id),
      FOREIGN KEY (prompt_key, restored_from) REFERENCES prompt_revisions (prompt_key, id)
    );
    -- Actor is a historical id, not a FK that user deletion could rewrite.
    CREATE FUNCTION reject_prompt_revision_mutation() RETURNS trigger LANGUAGE plpgsql AS $$
    BEGIN
      RAISE EXCEPTION 'Prompt revisions are append-only';
    END;
    $$;
    CREATE TRIGGER prompt_revisions_immutable BEFORE UPDATE OR DELETE ON prompt_revisions
      FOR EACH ROW EXECUTE FUNCTION reject_prompt_revision_mutation();
  `);
};

exports.down = pgm => {
  pgm.sql('DROP TABLE prompt_revisions; DROP FUNCTION reject_prompt_revision_mutation();');
};