/* eslint-disable */
/**
 * 客户回款记录：记录应收发票的到期日与实际回款日，用于自动计算客户平均逾期天数，
 * 替代人工维护的 avg_overdue_days，并驱动"客户逾期超N天"红线。
 */

exports.up = (pgm) => {
  pgm.sql(`
    CREATE TABLE IF NOT EXISTS customer_payments (
      id SERIAL PRIMARY KEY,
      customer_id TEXT NOT NULL REFERENCES customers(id) ON DELETE CASCADE,
      invoice_amount DOUBLE PRECISION NOT NULL DEFAULT 0,
      due_date DATE NOT NULL,
      paid_date DATE,
      note TEXT,
      created_at TIMESTAMPTZ NOT NULL DEFAULT now()
    );
    CREATE INDEX IF NOT EXISTS idx_customer_payments_cust ON customer_payments(customer_id);
  `);
};

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