import { describe, it, expect, beforeAll } from "vitest";
import { spawnSync } from "node:child_process";
import { existsSync } from "node:fs";
import { resolve } from "node:path";

const cliPath = resolve(__dirname, "..", "dist", "cli.js");

function runCli(args: string[], env: Record<string, string | undefined> = {}): {
  status: number;
  stdout: string;
  stderr: string;
} {
  const r = spawnSync(process.execPath, [cliPath, ...args], {
    encoding: "utf8",
    env: { ...process.env, ...env },
  });
  return {
    status: r.status ?? -1,
    stdout: typeof r.stdout === "string" ? r.stdout : "",
    stderr: typeof r.stderr === "string" ? r.stderr : "",
  };
}

describe("`check --hook` CLI behavior", () => {
  beforeAll(() => {
    if (!existsSync(cliPath)) {
      throw new Error(`CLI not built. Run \`npm run build\` first. Missing: ${cliPath}`);
    }
  });

  it("exits 0 silently when no name resolved (no --name, no env)", () => {
    const r = runCli(["check", "--hook"], { CLAUDE_MAILBOX_NAME: undefined });
    expect(r.status).toBe(0);
    expect(r.stdout).toBe("");
    expect(r.stderr).toBe("");
  });

  it("emits daemon-not-reachable hint when name is set but daemon is down", () => {
    const r = runCli(
      ["check", "--hook", "--url", "http://127.0.0.1:1"],
      { CLAUDE_MAILBOX_NAME: "alice" },
    );
    expect(r.status).toBe(0);
    expect(r.stdout).toContain("[Claude-Mailbox] Daemon not reachable");
    expect(r.stdout).toContain("http://127.0.0.1:1");
    expect(r.stdout).toContain("claude-mailbox install-autostart");
  });

  it("`--name` arg wins over CLAUDE_MAILBOX_NAME env (visible via hint URL/contents)", () => {
    const r = runCli(
      ["check", "--hook", "--name", "bob", "--url", "http://127.0.0.1:1"],
      { CLAUDE_MAILBOX_NAME: "alice" },
    );
    expect(r.status).toBe(0);
    expect(r.stdout).toContain("[Claude-Mailbox] Daemon not reachable");
  });

  it("non-hook mode errors out when no name resolved", () => {
    const r = runCli(["check"], { CLAUDE_MAILBOX_NAME: undefined });
    expect(r.status).not.toBe(0);
    expect(r.stderr).toContain("CLAUDE_MAILBOX_NAME");
  });
});