/* eslint-disable */
/** 费率表后台化：消除硬编码，支持按地域/分类管理费率，版本化发布。 */

exports.up = (pgm) => {
  pgm.sql(`
    CREATE TABLE IF NOT EXISTS rate_tables (
      id BIGSERIAL PRIMARY KEY,
      region TEXT NOT NULL,
      category TEXT NOT NULL,
      key TEXT NOT NULL,
      value DOUBLE PRECISION NOT NULL,
      effective_date DATE NOT NULL DEFAULT CURRENT_DATE,
      version INT NOT NULL DEFAULT 1,
      reviewed BOOLEAN NOT NULL DEFAULT false,
      updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
      UNIQUE(region, category, key, version)
    );
    CREATE INDEX IF NOT EXISTS idx_rate_tables_region ON rate_tables(region, category);
  `);
};

exports.down = (pgm) => {
  pgm.sql(`DROP TABLE IF EXISTS rate_tables;`);
};