import { readFileSync } from "node:fs";
import path from "node:path";
import { describe, expect, it } from "vitest";
import { assertAbsoluteApiUrlHasApiSegment } from "./api-url-contract";

describe("assertAbsoluteApiUrlHasApiSegment", () => {
  it("allows relative /api", () => {
    expect(() => assertAbsoluteApiUrlHasApiSegment("/api")).not.toThrow();
  });

  it("allows empty or undefined", () => {
    expect(() => assertAbsoluteApiUrlHasApiSegment(undefined)).not.toThrow();
    expect(() => assertAbsoluteApiUrlHasApiSegment("")).not.toThrow();
  });

  it("allows absolute URL ending with /api", () => {
    expect(() =>
      assertAbsoluteApiUrlHasApiSegment("https://api.seahavenindustries.com/api"),
    ).not.toThrow();
  });

  it("rejects absolute URL without /api", () => {
    expect(() => assertAbsoluteApiUrlHasApiSegment("https://api.seahavenindustries.com")).toThrow(
      /must end with \/api/,
    );
  });
});

describe(".env.example contract", () => {
  it("documents an absolute VITE_API_URL that includes /api", () => {
    const envExample = readFileSync(path.resolve(process.cwd(), ".env.example"), "utf8");
    const match = envExample.match(/^VITE_API_URL=(.+)$/m);

    expect(match).not.toBeNull();
    const value = match![1]!.trim();

    if (value.startsWith("http")) {
      expect(() => assertAbsoluteApiUrlHasApiSegment(value)).not.toThrow();
    }
  });
});