import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { describe, expect, test, vi } from "vitest";
import {
  agentCommand,
  connectOk,
  installGatewayTestHooks,
  rpcReq,
  startServerWithClient,
  testState,
} from "./test-helpers.js";

installGatewayTestHooks();

const BASE_IMAGE_PNG =
  "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+X3mIAAAAASUVORK5CYII=";

function expectChannels(call: Record<string, unknown>, channel: string) {
  expect(call.channel).toBe(channel);
  expect(call.messageChannel).toBe(channel);
}

describe("gateway server agent", () => {
  test("agent marks implicit delivery when lastTo is stale", async () => {
    testState.allowFrom = ["+436769770569"];
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-stale",
            updatedAt: Date.now(),
            lastChannel: "whatsapp",
            lastTo: "+1555",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      channel: "last",
      deliver: true,
      idempotencyKey: "idem-agent-last-stale",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "whatsapp");
    expect(call.to).toBe("+1555");
    expect(call.deliveryTargetMode).toBe("implicit");
    expect(call.sessionId).toBe("sess-main-stale");

    ws.close();
    await server.close();
    testState.allowFrom = undefined;
  });

  test("agent forwards sessionKey to agentCommand", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          "agent:main:subagent:abc": {
            sessionId: "sess-sub",
            updatedAt: Date.now(),
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "agent:main:subagent:abc",
      idempotencyKey: "idem-agent-subkey",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expect(call.sessionKey).toBe("agent:main:subagent:abc");
    expect(call.sessionId).toBe("sess-sub");
    expectChannels(call, "webchat");
    expect(call.deliver).toBe(false);
    expect(call.to).toBeUndefined();

    ws.close();
    await server.close();
  });

  test("agent forwards accountId to agentCommand", async () => {
    testState.allowFrom = ["+1555"];
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-account",
            updatedAt: Date.now(),
            lastChannel: "whatsapp",
            lastTo: "+1555",
            lastAccountId: "default",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      deliver: true,
      accountId: "kev",
      idempotencyKey: "idem-agent-account",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "whatsapp");
    expect(call.to).toBe("+1555");
    expect(call.accountId).toBe("kev");

    ws.close();
    await server.close();
    testState.allowFrom = undefined;
  });

  test("agent avoids lastAccountId when explicit to is provided", async () => {
    testState.allowFrom = ["+1555"];
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-explicit",
            updatedAt: Date.now(),
            lastChannel: "whatsapp",
            lastTo: "+1555",
            lastAccountId: "legacy",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      deliver: true,
      to: "+1666",
      idempotencyKey: "idem-agent-explicit",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "whatsapp");
    expect(call.to).toBe("+1666");
    expect(call.accountId).toBeUndefined();

    ws.close();
    await server.close();
    testState.allowFrom = undefined;
  });

  test("agent falls back to lastAccountId for implicit delivery", async () => {
    testState.allowFrom = ["+1555"];
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-implicit",
            updatedAt: Date.now(),
            lastChannel: "whatsapp",
            lastTo: "+1555",
            lastAccountId: "kev",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      deliver: true,
      idempotencyKey: "idem-agent-implicit-account",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "whatsapp");
    expect(call.to).toBe("+1555");
    expect(call.accountId).toBe("kev");

    ws.close();
    await server.close();
    testState.allowFrom = undefined;
  });

  test("agent forwards image attachments as images[]", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-images",
            updatedAt: Date.now(),
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "what is in the image?",
      sessionKey: "main",
      attachments: [
        {
          mimeType: "image/png",
          fileName: "tiny.png",
          content: BASE_IMAGE_PNG,
        },
      ],
      idempotencyKey: "idem-agent-attachments",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expect(call.sessionKey).toBe("main");
    expectChannels(call, "webchat");
    expect(call.message).toBe("what is in the image?");

    const images = call.images as Array<Record<string, unknown>>;
    expect(Array.isArray(images)).toBe(true);
    expect(images.length).toBe(1);
    expect(images[0]?.type).toBe("image");
    expect(images[0]?.mimeType).toBe("image/png");
    expect(images[0]?.data).toBe(BASE_IMAGE_PNG);

    ws.close();
    await server.close();
  });

  test("agent falls back to whatsapp when delivery requested and no last channel exists", async () => {
    testState.allowFrom = ["+1555"];
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-missing-provider",
            updatedAt: Date.now(),
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      deliver: true,
      idempotencyKey: "idem-agent-missing-provider",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "whatsapp");
    expect(call.to).toBe("+1555");
    expect(call.deliver).toBe(true);
    expect(call.sessionId).toBe("sess-main-missing-provider");

    ws.close();
    await server.close();
    testState.allowFrom = undefined;
  });

  test("agent routes main last-channel whatsapp", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main-whatsapp",
            updatedAt: Date.now(),
            lastChannel: "whatsapp",
            lastTo: "+1555",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      channel: "last",
      deliver: true,
      idempotencyKey: "idem-agent-last-whatsapp",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "whatsapp");
    expect(call.messageChannel).toBe("whatsapp");
    expect(call.to).toBe("+1555");
    expect(call.deliver).toBe(true);
    expect(call.bestEffortDeliver).toBe(true);
    expect(call.sessionId).toBe("sess-main-whatsapp");

    ws.close();
    await server.close();
  });

  test("agent routes main last-channel telegram", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-main",
            updatedAt: Date.now(),
            lastChannel: "telegram",
            lastTo: "123",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      channel: "last",
      deliver: true,
      idempotencyKey: "idem-agent-last",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "telegram");
    expect(call.to).toBe("123");
    expect(call.deliver).toBe(true);
    expect(call.bestEffortDeliver).toBe(true);
    expect(call.sessionId).toBe("sess-main");

    ws.close();
    await server.close();
  });

  test("agent routes main last-channel discord", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-discord",
            updatedAt: Date.now(),
            lastChannel: "discord",
            lastTo: "channel:discord-123",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      channel: "last",
      deliver: true,
      idempotencyKey: "idem-agent-last-discord",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "discord");
    expect(call.to).toBe("channel:discord-123");
    expect(call.deliver).toBe(true);
    expect(call.bestEffortDeliver).toBe(true);
    expect(call.sessionId).toBe("sess-discord");

    ws.close();
    await server.close();
  });

  test("agent routes main last-channel slack", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-slack",
            updatedAt: Date.now(),
            lastChannel: "slack",
            lastTo: "channel:slack-123",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      channel: "last",
      deliver: true,
      idempotencyKey: "idem-agent-last-slack",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "slack");
    expect(call.to).toBe("channel:slack-123");
    expect(call.deliver).toBe(true);
    expect(call.bestEffortDeliver).toBe(true);
    expect(call.sessionId).toBe("sess-slack");

    ws.close();
    await server.close();
  });

  test("agent routes main last-channel signal", async () => {
    const dir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-gw-"));
    testState.sessionStorePath = path.join(dir, "sessions.json");
    await fs.writeFile(
      testState.sessionStorePath,
      JSON.stringify(
        {
          main: {
            sessionId: "sess-signal",
            updatedAt: Date.now(),
            lastChannel: "signal",
            lastTo: "+15551234567",
          },
        },
        null,
        2,
      ),
      "utf-8",
    );

    const { server, ws } = await startServerWithClient();
    await connectOk(ws);

    const res = await rpcReq(ws, "agent", {
      message: "hi",
      sessionKey: "main",
      channel: "last",
      deliver: true,
      idempotencyKey: "idem-agent-last-signal",
    });
    expect(res.ok).toBe(true);

    const spy = vi.mocked(agentCommand);
    const call = spy.mock.calls.at(-1)?.[0] as Record<string, unknown>;
    expectChannels(call, "signal");
    expect(call.to).toBe("+15551234567");
    expect(call.deliver).toBe(true);
    expect(call.bestEffortDeliver).toBe(true);
    expect(call.sessionId).toBe("sess-signal");

    ws.close();
    await server.close();
  });
});