import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import { describe, expect, it, vi } from "vitest";
import {
  assertProvider,
  CONFIG_DIR,
  ensureDir,
  jidToE164,
  normalizeE164,
  normalizePath,
  resolveUserPath,
  sleep,
  toWhatsappJid,
  withWhatsAppPrefix,
} from "./utils.js";

describe("normalizePath", () => {
  it("adds leading slash when missing", () => {
    expect(normalizePath("foo")).toBe("/foo");
  });

  it("keeps existing slash", () => {
    expect(normalizePath("/bar")).toBe("/bar");
  });
});

describe("withWhatsAppPrefix", () => {
  it("adds whatsapp prefix", () => {
    expect(withWhatsAppPrefix("+1555")).toBe("whatsapp:+1555");
  });

  it("leaves prefixed intact", () => {
    expect(withWhatsAppPrefix("whatsapp:+1555")).toBe("whatsapp:+1555");
  });
});

describe("ensureDir", () => {
  it("creates nested directory", async () => {
    const tmp = await fs.promises.mkdtemp(
      path.join(os.tmpdir(), "clawdbot-test-"),
    );
    const target = path.join(tmp, "nested", "dir");
    await ensureDir(target);
    expect(fs.existsSync(target)).toBe(true);
  });
});

describe("sleep", () => {
  it("resolves after delay using fake timers", async () => {
    vi.useFakeTimers();
    const promise = sleep(1000);
    vi.advanceTimersByTime(1000);
    await expect(promise).resolves.toBeUndefined();
    vi.useRealTimers();
  });
});

describe("assertProvider", () => {
  it("throws for invalid provider", () => {
    expect(() => assertProvider("bad" as string)).toThrow();
  });
});

describe("normalizeE164 & toWhatsappJid", () => {
  it("strips formatting and prefixes", () => {
    expect(normalizeE164("whatsapp:(555) 123-4567")).toBe("+5551234567");
    expect(toWhatsappJid("whatsapp:+555 123 4567")).toBe(
      "5551234567@s.whatsapp.net",
    );
  });

  it("preserves existing JIDs", () => {
    expect(toWhatsappJid("123456789-987654321@g.us")).toBe(
      "123456789-987654321@g.us",
    );
    expect(toWhatsappJid("whatsapp:123456789-987654321@g.us")).toBe(
      "123456789-987654321@g.us",
    );
    expect(toWhatsappJid("1555123@s.whatsapp.net")).toBe(
      "1555123@s.whatsapp.net",
    );
  });
});

describe("jidToE164", () => {
  it("maps @lid using reverse mapping file", () => {
    const mappingPath = `${CONFIG_DIR}/credentials/lid-mapping-123_reverse.json`;
    const original = fs.readFileSync;
    const spy = vi
      .spyOn(fs, "readFileSync")
      // biome-ignore lint/suspicious/noExplicitAny: forwarding to native signature
      .mockImplementation((path: any, encoding?: any) => {
        if (path === mappingPath) return `"5551234"`;
        return original(path, encoding);
      });
    expect(jidToE164("123@lid")).toBe("+5551234");
    spy.mockRestore();
  });
});

describe("resolveUserPath", () => {
  it("expands ~ to home dir", () => {
    expect(resolveUserPath("~")).toBe(path.resolve(os.homedir()));
  });

  it("expands ~/ to home dir", () => {
    expect(resolveUserPath("~/clawd")).toBe(
      path.resolve(os.homedir(), "clawd"),
    );
  });

  it("resolves relative paths", () => {
    expect(resolveUserPath("tmp/dir")).toBe(path.resolve("tmp/dir"));
  });
});