import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";

import { afterEach, describe, expect, it, vi } from "vitest";

vi.mock("../agents/pi-embedded.js", () => ({
  runEmbeddedPiAgent: vi.fn(),
}));

import { runEmbeddedPiAgent } from "../agents/pi-embedded.js";
import {
  extractThinkDirective,
  extractVerboseDirective,
  getReplyFromConfig,
} from "./reply.js";

async function withTempHome<T>(fn: (home: string) => Promise<T>): Promise<T> {
  const base = await fs.mkdtemp(path.join(os.tmpdir(), "clawdis-reply-"));
  const previousHome = process.env.HOME;
  process.env.HOME = base;
  try {
    return await fn(base);
  } finally {
    process.env.HOME = previousHome;
    await fs.rm(base, { recursive: true, force: true });
  }
}

describe("directive parsing", () => {
  afterEach(() => {
    vi.restoreAllMocks();
  });

  it("ignores verbose directive inside URL", () => {
    const body = "https://x.com/verioussmith/status/1997066835133669687";
    const res = extractVerboseDirective(body);
    expect(res.hasDirective).toBe(false);
    expect(res.cleaned).toBe(body);
  });

  it("ignores typoed /verioussmith", () => {
    const body = "/verioussmith";
    const res = extractVerboseDirective(body);
    expect(res.hasDirective).toBe(false);
    expect(res.cleaned).toBe(body.trim());
  });

  it("ignores think directive inside URL", () => {
    const body = "see https://example.com/path/thinkstuff";
    const res = extractThinkDirective(body);
    expect(res.hasDirective).toBe(false);
  });

  it("matches verbose with leading space", () => {
    const res = extractVerboseDirective(" please /verbose on now");
    expect(res.hasDirective).toBe(true);
    expect(res.verboseLevel).toBe("on");
  });

  it("matches think at start of line", () => {
    const res = extractThinkDirective("/think:high run slow");
    expect(res.hasDirective).toBe(true);
    expect(res.thinkLevel).toBe("high");
  });

  it("applies inline think and still runs agent content", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockResolvedValue({
        payloads: [{ text: "done" }],
        meta: {
          durationMs: 5,
          agentMeta: { sessionId: "s", provider: "p", model: "m" },
        },
      });

      const res = await getReplyFromConfig(
        {
          Body: "please sync /think:high now",
          From: "+1004",
          To: "+2000",
        },
        {},
        {
          inbound: {
            allowFrom: ["*"],
            workspace: path.join(home, "clawd"),
            agent: { provider: "anthropic", model: "claude-opus-4-5" },
            session: { store: path.join(home, "sessions.json") },
          },
        },
      );

      const text = Array.isArray(res) ? res[0]?.text : res?.text;
      expect(text).toBe("done");
      expect(runEmbeddedPiAgent).toHaveBeenCalledOnce();
    });
  });

  it("acks verbose directive immediately with system marker", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockReset();

      const res = await getReplyFromConfig(
        { Body: "/verbose on", From: "+1222", To: "+1222" },
        {},
        {
          inbound: {
            workspace: path.join(home, "clawd"),
            agent: { provider: "anthropic", model: "claude-opus-4-5" },
            session: { store: path.join(home, "sessions.json") },
          },
        },
      );

      const text = Array.isArray(res) ? res[0]?.text : res?.text;
      expect(text).toMatch(/^⚙️ Verbose logging enabled\./);
      expect(runEmbeddedPiAgent).not.toHaveBeenCalled();
    });
  });
});