import { describe, expect, test } from "bun:test";
import { join } from "node:path";

const repoRoot = join(import.meta.dir, "..", "..", "..");
const entry = join(repoRoot, "packages", "bin", "src", "index.ts");

async function runKitchen(args: string[]) {
  const proc = Bun.spawn(["bun", entry, ...args], {
    cwd: repoRoot,
    stdout: "pipe",
    stderr: "pipe",
  });
  const [stdout, stderr] = await Promise.all([
    new Response(proc.stdout).text(),
    new Response(proc.stderr).text(),
  ]);
  const exitCode = await proc.exited;
  return { exitCode, stdout, stderr };
}

describe("kitchen CLI (e2e)", () => {
  test("view renders a recipe file to stdout and exits 0", async () => {
    const { exitCode, stdout, stderr } = await runKitchen(["view", "fixtures/prose.md"]);
    const out = Bun.stripANSI(stdout);
    expect(exitCode).toBe(0);
    expect(stderr).toBe("");
    expect(out).toContain("Buttered Toast");
    expect(out).toContain("Method");
    expect(out).toContain("Serving");
    expect(out).toContain("Cut into triangles and serve at once.");
  });

  test("view preserves document order in the output", async () => {
    const { stdout } = await runKitchen(["view", "fixtures/prose.md"]);
    const out = Bun.stripANSI(stdout);
    expect(out.indexOf("Method")).toBeLessThan(out.indexOf("Serving"));
  });

  test("ANSI styling is suppressed when stdout is not a TTY (piped)", async () => {
    const { stdout } = await runKitchen(["view", "fixtures/prose.md"]);
    expect(stdout).not.toContain("\x1b");
  });

  test("a nonexistent file prints a human-readable error to stderr and exits 1", async () => {
    const { exitCode, stdout, stderr } = await runKitchen(["view", "does/not/exist.md"]);
    expect(exitCode).toBe(1);
    expect(stdout).toBe("");
    expect(stderr).toContain("cannot read");
    expect(stderr).toContain("does/not/exist.md");
    expect(stderr.startsWith("kitchen:")).toBe(true);
  });

  test("a missing file argument prints usage to stderr and exits 1", async () => {
    const { exitCode, stderr } = await runKitchen(["view"]);
    expect(exitCode).toBe(1);
    expect(stderr).not.toBe("");
    expect(stderr.toLowerCase()).toContain("missing required argument");
  });

  test("--help lists the view command and exits 0", async () => {
    const { exitCode, stdout } = await runKitchen(["--help"]);
    expect(exitCode).toBe(0);
    expect(stdout).toContain("view");
  });
});