import "./test-helpers.js";
import crypto from "node:crypto";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import sharp from "sharp";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import * as ssrf from "../infra/net/ssrf.js";

const TEST_NET_IP = "203.0.113.10";

vi.mock("../agents/pi-embedded.js", () => ({
  abortEmbeddedPiRun: vi.fn().mockReturnValue(false),
  isEmbeddedPiRunActive: vi.fn().mockReturnValue(false),
  isEmbeddedPiRunStreaming: vi.fn().mockReturnValue(false),
  runEmbeddedPiAgent: vi.fn(),
  queueEmbeddedPiMessage: vi.fn().mockReturnValue(false),
  resolveEmbeddedSessionLane: (key: string) => `session:${key.trim() || "main"}`,
}));

import { resetInboundDedupe } from "../auto-reply/reply/inbound-dedupe.js";
import { resetLogger, setLoggerOverride } from "../logging.js";
import { monitorWebChannel } from "./auto-reply.js";
import { resetBaileysMocks, resetLoadConfigMock, setLoadConfigMock } from "./test-helpers.js";

let previousHome: string | undefined;
let tempHome: string | undefined;

const rmDirWithRetries = async (dir: string): Promise<void> => {
  // Some tests can leave async session-store writes in-flight; recursive deletion can race and throw ENOTEMPTY.
  for (let attempt = 0; attempt < 10; attempt += 1) {
    try {
      await fs.rm(dir, { recursive: true, force: true });
      return;
    } catch (err) {
      const code =
        err && typeof err === "object" && "code" in err
          ? String((err as { code?: unknown }).code)
          : null;
      if (code === "ENOTEMPTY" || code === "EBUSY" || code === "EPERM") {
        await new Promise((resolve) => setTimeout(resolve, 25));
        continue;
      }
      throw err;
    }
  }

  await fs.rm(dir, { recursive: true, force: true });
};

beforeEach(async () => {
  resetInboundDedupe();
  previousHome = process.env.HOME;
  tempHome = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-web-home-"));
  process.env.HOME = tempHome;
});

afterEach(async () => {
  process.env.HOME = previousHome;
  if (tempHome) {
    await rmDirWithRetries(tempHome);
    tempHome = undefined;
  }
});

const _makeSessionStore = async (
  entries: Record<string, unknown> = {},
): Promise<{ storePath: string; cleanup: () => Promise<void> }> => {
  const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-session-"));
  const storePath = path.join(dir, "sessions.json");
  await fs.writeFile(storePath, JSON.stringify(entries));
  const cleanup = async () => {
    // Session store writes can be in-flight when the test finishes (e.g. updateLastRoute
    // after a message flush). `fs.rm({ recursive })` can race and throw ENOTEMPTY.
    for (let attempt = 0; attempt < 10; attempt += 1) {
      try {
        await fs.rm(dir, { recursive: true, force: true });
        return;
      } catch (err) {
        const code =
          err && typeof err === "object" && "code" in err
            ? String((err as { code?: unknown }).code)
            : null;
        if (code === "ENOTEMPTY" || code === "EBUSY" || code === "EPERM") {
          await new Promise((resolve) => setTimeout(resolve, 25));
          continue;
        }
        throw err;
      }
    }

    await fs.rm(dir, { recursive: true, force: true });
  };
  return {
    storePath,
    cleanup,
  };
};

describe("web auto-reply", () => {
  let resolvePinnedHostnameSpy: any;

  beforeEach(() => {
    vi.clearAllMocks();
    resetBaileysMocks();
    resetLoadConfigMock();
    resolvePinnedHostnameSpy = vi
      .spyOn(ssrf, "resolvePinnedHostname")
      .mockImplementation(async (hostname) => {
        // SSRF guard pins DNS; stub resolution to avoid live lookups in unit tests.
        const normalized = hostname.trim().toLowerCase().replace(/\.$/, "");
        const addresses = [TEST_NET_IP];
        return {
          hostname: normalized,
          addresses,
          lookup: ssrf.createPinnedLookup({ hostname: normalized, addresses }),
        };
      });
  });

  afterEach(() => {
    resolvePinnedHostnameSpy?.mockRestore();
    resolvePinnedHostnameSpy = undefined;
    resetLogger();
    setLoggerOverride(null);
    vi.useRealTimers();
  });

  it("compresses common formats to jpeg under the cap", { timeout: 45_000 }, async () => {
    const formats = [
      {
        name: "png",
        mime: "image/png",
        make: (buf: Buffer, opts: { width: number; height: number }) =>
          sharp(buf, {
            raw: { width: opts.width, height: opts.height, channels: 3 },
          })
            .png({ compressionLevel: 0 })
            .toBuffer(),
      },
      {
        name: "jpeg",
        mime: "image/jpeg",
        make: (buf: Buffer, opts: { width: number; height: number }) =>
          sharp(buf, {
            raw: { width: opts.width, height: opts.height, channels: 3 },
          })
            .jpeg({ quality: 90 })
            .toBuffer(),
      },
      {
        name: "webp",
        mime: "image/webp",
        make: (buf: Buffer, opts: { width: number; height: number }) =>
          sharp(buf, {
            raw: { width: opts.width, height: opts.height, channels: 3 },
          })
            .webp({ quality: 100 })
            .toBuffer(),
      },
    ] as const;

    for (const fmt of formats) {
      // Force a small cap to ensure compression is exercised for every format.
      setLoadConfigMock(() => ({ agents: { defaults: { mediaMaxMb: 1 } } }));
      const sendMedia = vi.fn();
      const reply = vi.fn().mockResolvedValue(undefined);
      const sendComposing = vi.fn();
      const resolver = vi.fn().mockResolvedValue({
        text: "hi",
        mediaUrl: `https://example.com/big.${fmt.name}`,
      });

      let capturedOnMessage:
        | ((msg: import("./inbound.js").WebInboundMessage) => Promise<void>)
        | undefined;
      const listenerFactory = async (opts: {
        onMessage: (msg: import("./inbound.js").WebInboundMessage) => Promise<void>;
      }) => {
        capturedOnMessage = opts.onMessage;
        return { close: vi.fn() };
      };

      const width = 1200;
      const height = 1200;
      const raw = crypto.randomBytes(width * height * 3);
      const big = await fmt.make(raw, { width, height });
      expect(big.length).toBeGreaterThan(1 * 1024 * 1024);

      const fetchMock = vi.spyOn(globalThis, "fetch").mockResolvedValue({
        ok: true,
        body: true,
        arrayBuffer: async () => big.buffer.slice(big.byteOffset, big.byteOffset + big.byteLength),
        headers: { get: () => fmt.mime },
        status: 200,
      } as Response);

      await monitorWebChannel(false, listenerFactory, false, resolver);
      expect(capturedOnMessage).toBeDefined();

      await capturedOnMessage?.({
        body: "hello",
        from: "+1",
        to: "+2",
        id: `msg-${fmt.name}`,
        sendComposing,
        reply,
        sendMedia,
      });

      expect(sendMedia).toHaveBeenCalledTimes(1);
      const payload = sendMedia.mock.calls[0][0] as {
        image: Buffer;
        mimetype?: string;
      };
      expect(payload.image.length).toBeLessThanOrEqual(1 * 1024 * 1024);
      expect(payload.mimetype).toBe("image/jpeg");
      expect(reply).not.toHaveBeenCalled();

      fetchMock.mockRestore();
      resetLoadConfigMock();
    }
  });

  it("honors mediaMaxMb from config", async () => {
    setLoadConfigMock(() => ({ agents: { defaults: { mediaMaxMb: 1 } } }));
    const sendMedia = vi.fn();
    const reply = vi.fn().mockResolvedValue(undefined);
    const sendComposing = vi.fn();
    const resolver = vi.fn().mockResolvedValue({
      text: "hi",
      mediaUrl: "https://example.com/big.png",
    });

    let capturedOnMessage:
      | ((msg: import("./inbound.js").WebInboundMessage) => Promise<void>)
      | undefined;
    const listenerFactory = async (opts: {
      onMessage: (msg: import("./inbound.js").WebInboundMessage) => Promise<void>;
    }) => {
      capturedOnMessage = opts.onMessage;
      return { close: vi.fn() };
    };

    const bigPng = await sharp({
      create: {
        width: 2600,
        height: 2600,
        channels: 3,
        background: { r: 0, g: 0, b: 255 },
      },
    })
      .png({ compressionLevel: 0 })
      .toBuffer();
    expect(bigPng.length).toBeGreaterThan(1 * 1024 * 1024);

    const fetchMock = vi.spyOn(globalThis, "fetch").mockResolvedValue({
      ok: true,
      body: true,
      arrayBuffer: async () =>
        bigPng.buffer.slice(bigPng.byteOffset, bigPng.byteOffset + bigPng.byteLength),
      headers: { get: () => "image/png" },
      status: 200,
    } as Response);

    await monitorWebChannel(false, listenerFactory, false, resolver);
    expect(capturedOnMessage).toBeDefined();

    await capturedOnMessage?.({
      body: "hello",
      from: "+1",
      to: "+2",
      id: "msg1",
      sendComposing,
      reply,
      sendMedia,
    });

    expect(sendMedia).toHaveBeenCalledTimes(1);
    const payload = sendMedia.mock.calls[0][0] as {
      image: Buffer;
      caption?: string;
      mimetype?: string;
    };
    expect(payload.image.length).toBeLessThanOrEqual(1 * 1024 * 1024);
    expect(payload.mimetype).toBe("image/jpeg");
    expect(reply).not.toHaveBeenCalled();

    fetchMock.mockRestore();
  });
  it("falls back to text when media is unsupported", async () => {
    const sendMedia = vi.fn();
    const reply = vi.fn().mockResolvedValue(undefined);
    const sendComposing = vi.fn();
    const resolver = vi.fn().mockResolvedValue({
      text: "hi",
      mediaUrl: "https://example.com/file.pdf",
    });

    let capturedOnMessage:
      | ((msg: import("./inbound.js").WebInboundMessage) => Promise<void>)
      | undefined;
    const listenerFactory = async (opts: {
      onMessage: (msg: import("./inbound.js").WebInboundMessage) => Promise<void>;
    }) => {
      capturedOnMessage = opts.onMessage;
      return { close: vi.fn() };
    };

    const fetchMock = vi.spyOn(globalThis, "fetch").mockResolvedValue({
      ok: true,
      body: true,
      arrayBuffer: async () => Buffer.from("%PDF-1.4").buffer,
      headers: { get: () => "application/pdf" },
      status: 200,
    } as Response);

    await monitorWebChannel(false, listenerFactory, false, resolver);
    expect(capturedOnMessage).toBeDefined();

    await capturedOnMessage?.({
      body: "hello",
      from: "+1",
      to: "+2",
      id: "msg-pdf",
      sendComposing,
      reply,
      sendMedia,
    });

    expect(sendMedia).toHaveBeenCalledTimes(1);
    const payload = sendMedia.mock.calls[0][0] as {
      document?: Buffer;
      caption?: string;
      fileName?: string;
    };
    expect(payload.document).toBeInstanceOf(Buffer);
    expect(payload.fileName).toBe("file.pdf");
    expect(payload.caption).toBe("hi");
    expect(reply).not.toHaveBeenCalled();

    fetchMock.mockRestore();
  });
});
