import { describe, expect, it } from "vitest";
import { hasCapacity, remainingCapacity } from "../../app/services/capacity.server";

describe("remainingCapacity", () => {
  it("subtracts consumed from capacity", () => {
    expect(remainingCapacity({ capacity: 10, consumed: 3 })).toBe(7);
  });

  it("floors at 0 rather than going negative (overbooking never surfaces as negative capacity)", () => {
    expect(remainingCapacity({ capacity: 10, consumed: 15 })).toBe(0);
  });

  it("treats zero consumed as full capacity", () => {
    expect(remainingCapacity({ capacity: 10, consumed: 0 })).toBe(10);
  });
});

describe("hasCapacity", () => {
  it("is true when remaining capacity is positive", () => {
    expect(hasCapacity({ capacity: 10, consumed: 9 })).toBe(true);
  });

  it("is false when exactly full", () => {
    expect(hasCapacity({ capacity: 10, consumed: 10 })).toBe(false);
  });

  it("is false when over capacity", () => {
    expect(hasCapacity({ capacity: 10, consumed: 11 })).toBe(false);
  });
});