/**
 * Phase 3 — user-created frames and cost symbols.
 *
 * custom_frames: private per-user frames. `palette` holds the full slot
 * map (outer, border, titleBar, typeBar, textBox, artBacking, text,
 * titleText, accent) as JSONB so new slots stay additive.
 *
 * custom_symbols: user-uploaded cost icons keyed by a short code used in
 * mana cost strings ({F}, {2}{F}...).
 *
 * custom_cards.custom_frame_id: set when a design uses a custom frame;
 * NULL means the starter frame in `frame_id` applies.
 */
export const up = (pgm) => {
  pgm.sql(`
    CREATE TABLE IF NOT EXISTS custom_frames (
      id SERIAL PRIMARY KEY,
      user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
      name VARCHAR(100) NOT NULL,
      palette JSONB NOT NULL,
      created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
      updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
      CONSTRAINT uq_custom_frames_user_name UNIQUE (user_id, name)
    )
  `);

  pgm.sql(`
    CREATE TABLE IF NOT EXISTS custom_symbols (
      id SERIAL PRIMARY KEY,
      user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
      code VARCHAR(10) NOT NULL,
      image_url TEXT NOT NULL,
      created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
      CONSTRAINT uq_custom_symbols_user_code UNIQUE (user_id, code)
    )
  `);

  pgm.sql(`
    ALTER TABLE custom_cards
      ADD COLUMN IF NOT EXISTS custom_frame_id INTEGER REFERENCES custom_frames(id) ON DELETE SET NULL
  `);

  pgm.sql(`
    CREATE INDEX IF NOT EXISTS idx_custom_cards_custom_frame_id
    ON custom_cards(custom_frame_id)
  `);
};

export const down = (pgm) => {
  pgm.sql(`
    ALTER TABLE custom_cards DROP COLUMN IF EXISTS custom_frame_id
  `);

  pgm.sql(`DROP TABLE IF EXISTS custom_symbols CASCADE`);
  pgm.sql(`DROP TABLE IF EXISTS custom_frames CASCADE`);
};