import test from "node:test";
import assert from "node:assert/strict";
import os from "node:os";
import path from "node:path";
import { mkdir, mkdtemp, rm } from "node:fs/promises";

let runtimeRoot = "";
let replyToMasterAgentUserMessage: (typeof import("../src/lib/boss-master-agent"))["replyToMasterAgentUserMessage"];
let saveAiAccount: (typeof import("../src/lib/boss-data"))["saveAiAccount"];
let readState: (typeof import("../src/lib/boss-data"))["readState"];
let updateAiAccountHealth: (typeof import("../src/lib/boss-data"))["updateAiAccountHealth"];

async function setup() {
  if (runtimeRoot) return;

  runtimeRoot = await mkdtemp(path.join(os.tmpdir(), "boss-master-agent-fallback-"));
  process.env.BOSS_RUNTIME_ROOT = runtimeRoot;
  process.env.BOSS_STATE_FILE = path.join(runtimeRoot, "boss-state.json");

  const [masterAgent, data] = await Promise.all([
    import("../src/lib/boss-master-agent.ts"),
    import("../src/lib/boss-data.ts"),
  ]);

  replyToMasterAgentUserMessage = masterAgent.replyToMasterAgentUserMessage;
  saveAiAccount = data.saveAiAccount;
  readState = data.readState;
  updateAiAccountHealth = data.updateAiAccountHealth;
}

test.after(async () => {
  if (runtimeRoot) {
    await rm(runtimeRoot, { recursive: true, force: true });
  }
});

test.beforeEach(async () => {
  await setup();
  await rm(runtimeRoot, { recursive: true, force: true });
  await mkdir(runtimeRoot, { recursive: true });
});

test("replyToMasterAgentUserMessage falls back to a runnable OpenAI API account when the master node is offline", async () => {
  await saveAiAccount({
    accountId: "master-codex-primary",
    label: "主 GPT",
    role: "primary",
    provider: "master_codex_node",
    displayName: "Mac 上的 Master Codex Node",
    nodeId: "offline-node",
    nodeLabel: "离线节点",
    model: "gpt-5.4",
    enabled: true,
    setActive: true,
    loginStatusNote: "通过绑定的 Master Codex Node 对话。",
  });

  await saveAiAccount({
    accountId: "openai-backup",
    label: "备用 GPT",
    role: "backup",
    provider: "openai_api",
    displayName: "OpenAI API 备用账号",
    accountIdentifier: "sk-demo",
    model: "gpt-5.4",
    apiKey: "sk-live-demo-123456",
    enabled: true,
    setActive: false,
    loginStatusNote: "备用 API 账号。",
  });

  const originalFetch = globalThis.fetch;
  globalThis.fetch = (async (input) => {
    if (typeof input === "string" && input === "https://api.openai.com/v1/responses") {
      return new Response(JSON.stringify({ output_text: "主Agent链路正常。" }), {
        status: 200,
        headers: {
          "content-type": "application/json",
          "x-request-id": "req-master-fallback",
        },
      });
    }
    throw new Error(`unexpected fetch: ${String(input)}`);
  }) as typeof fetch;

  try {
    const result = await replyToMasterAgentUserMessage({
      requestMessageId: "msg-master-fallback",
      requestText: "请只回复：主Agent链路正常。",
      requestedBy: "Boss 超级管理员",
      requestedByAccount: "17600003315",
    });

    assert.equal(result.ok, true);
    assert.equal(result.accountId, "openai-backup");
    assert.equal(result.requestId, "req-master-fallback");

    const state = await readState();
    const masterProject = state.projects.find((project) => project.id === "master-agent");
    const reply = masterProject?.messages.at(-1);
    assert.ok(reply, "expected a master-agent reply to be appended");
    assert.equal(reply?.sender, "master");
    assert.equal(reply?.senderLabel, "主 Agent · 备用 GPT");
    assert.match(reply?.body ?? "", /主Agent链路正常/);
  } finally {
    globalThis.fetch = originalFetch;
  }
});

test("replyToMasterAgentUserMessage can retry the same degraded API account when it is the only available backend", async () => {
  await saveAiAccount({
    accountId: "master-codex-primary",
    label: "主 GPT",
    role: "primary",
    provider: "master_codex_node",
    displayName: "Mac 上的 Master Codex Node",
    nodeId: "offline-node",
    nodeLabel: "离线节点",
    model: "gpt-5.4",
    enabled: true,
    setActive: false,
    loginStatusNote: "测试中显式模拟默认主节点离线。",
  });
  await updateAiAccountHealth({
    accountId: "master-codex-primary",
    status: "degraded",
    lastError: "MASTER_CODEX_NODE_DEVICE_OFFLINE",
    lastValidatedAt: new Date().toISOString(),
  });

  await saveAiAccount({
    accountId: "openai-primary-degraded",
    label: "OpenAI 主控",
    role: "primary",
    provider: "openai_api",
    displayName: "OpenAI 主账号",
    model: "gpt-5.4",
    apiKey: "sk-openai-only",
    enabled: true,
    setActive: true,
    loginStatusNote: "唯一可用的 OpenAI 账号。",
  });
  await updateAiAccountHealth({
    accountId: "openai-primary-degraded",
    status: "degraded",
    lastError: "temporary failure",
    lastValidatedAt: new Date().toISOString(),
  });

  const originalFetch = globalThis.fetch;
  globalThis.fetch = (async (input) => {
    if (typeof input === "string" && input === "https://api.openai.com/v1/responses") {
      return new Response(JSON.stringify({ output_text: "仍然可以重试同一个 API 账号。" }), {
        status: 200,
        headers: {
          "content-type": "application/json",
          "x-request-id": "req-openai-degraded-retry",
        },
      });
    }
    throw new Error(`unexpected fetch: ${String(input)}`);
  }) as typeof fetch;

  try {
    const result = await replyToMasterAgentUserMessage({
      requestMessageId: "msg-openai-degraded-retry",
      requestText: "请只回复：仍然可以重试同一个 API 账号。",
      requestedBy: "Boss 超级管理员",
      requestedByAccount: "17600003315",
    });

    assert.equal(result.ok, true);
    assert.equal(result.accountId, "openai-primary-degraded");

    const state = await readState();
    const account = state.aiAccounts.find((item) => item.accountId === "openai-primary-degraded");
    assert.equal(account?.status, "ready");
    assert.equal(account?.isActive, true);
  } finally {
    globalThis.fetch = originalFetch;
  }
});

test("replyToMasterAgentUserMessage falls back to a runnable aliyun qwen backup account when the master node is offline", async () => {
  await saveAiAccount({
    accountId: "master-codex-primary",
    label: "主 GPT",
    role: "primary",
    provider: "master_codex_node",
    displayName: "Mac 上的 Master Codex Node",
    nodeId: "offline-node",
    nodeLabel: "离线节点",
    model: "gpt-5.4",
    enabled: true,
    setActive: true,
    loginStatusNote: "通过绑定的 Master Codex Node 对话。",
  });

  await saveAiAccount({
    accountId: "aliyun-qwen-backup",
    label: "阿里备用",
    role: "backup",
    provider: "aliyun_qwen_api",
    displayName: "阿里百炼备用账号",
    accountIdentifier: "dashscope-demo",
    model: "qwen3.5-plus",
    apiKey: "sk-aliyun-demo-123456",
    enabled: true,
    setActive: false,
    loginStatusNote: "阿里百炼 Qwen 备用账号。",
  });

  const originalFetch = globalThis.fetch;
  globalThis.fetch = (async (input) => {
    if (typeof input === "string" && input === "https://dashscope.aliyuncs.com/compatible-mode/v1/responses") {
      return new Response(JSON.stringify({ output_text: "阿里备用链路正常。" }), {
        status: 200,
        headers: {
          "content-type": "application/json",
          "x-request-id": "req-master-aliyun-fallback",
        },
      });
    }
    throw new Error(`unexpected fetch: ${String(input)}`);
  }) as typeof fetch;

  try {
    const result = await replyToMasterAgentUserMessage({
      requestMessageId: "msg-master-aliyun-fallback",
      requestText: "请只回复：阿里备用链路正常。",
      requestedBy: "Boss 超级管理员",
      requestedByAccount: "17600003315",
    });

    assert.equal(result.ok, true);
    assert.equal(result.accountId, "aliyun-qwen-backup");
    assert.equal(result.requestId, "req-master-aliyun-fallback");

    const state = await readState();
    const masterProject = state.projects.find((project) => project.id === "master-agent");
    const reply = masterProject?.messages.at(-1);
    assert.ok(reply, "expected a master-agent reply to be appended");
    assert.equal(reply?.sender, "master");
    assert.equal(reply?.senderLabel, "主 Agent · 阿里备用");
    assert.match(reply?.body ?? "", /阿里备用链路正常/);
  } finally {
    globalThis.fetch = originalFetch;
  }
});

test("replyToMasterAgentUserMessage retries the next ready API backup when the first API backend call fails", async () => {
  await saveAiAccount({
    accountId: "openai-primary-ready",
    label: "OpenAI 主控",
    role: "primary",
    provider: "openai_api",
    displayName: "OpenAI 主账号",
    model: "gpt-5.4",
    apiKey: "sk-openai-primary",
    enabled: true,
    setActive: true,
    loginStatusNote: "主 OpenAI 账号。",
  });

  await saveAiAccount({
    accountId: "aliyun-qwen-backup",
    label: "阿里备用",
    role: "backup",
    provider: "aliyun_qwen_api",
    displayName: "阿里百炼备用账号",
    accountIdentifier: "dashscope-demo",
    model: "qwen3.5-plus",
    apiKey: "sk-aliyun-demo-123456",
    enabled: true,
    setActive: false,
    loginStatusNote: "阿里百炼 Qwen 备用账号。",
  });

  const originalFetch = globalThis.fetch;
  globalThis.fetch = (async (input) => {
    if (typeof input === "string" && input === "https://api.openai.com/v1/responses") {
      return new Response(JSON.stringify({ error: { message: "openai temporary failure" } }), {
        status: 500,
        headers: { "content-type": "application/json" },
      });
    }
    if (typeof input === "string" && input === "https://dashscope.aliyuncs.com/compatible-mode/v1/responses") {
      return new Response(JSON.stringify({ output_text: "阿里备用接管成功。" }), {
        status: 200,
        headers: {
          "content-type": "application/json",
          "x-request-id": "req-master-api-chain",
        },
      });
    }
    throw new Error(`unexpected fetch: ${String(input)}`);
  }) as typeof fetch;

  try {
    const result = await replyToMasterAgentUserMessage({
      requestMessageId: "msg-master-api-chain",
      requestText: "请只回复：阿里备用接管成功。",
      requestedBy: "Boss 超级管理员",
      requestedByAccount: "17600003315",
    });

    assert.equal(result.ok, true);
    assert.equal(result.accountId, "aliyun-qwen-backup");
    assert.equal(result.requestId, "req-master-api-chain");

    const state = await readState();
    const openaiAccount = state.aiAccounts.find((item) => item.accountId === "openai-primary-ready");
    assert.equal(openaiAccount?.status, "degraded");
    const aliyunAccount = state.aiAccounts.find((item) => item.accountId === "aliyun-qwen-backup");
    assert.equal(aliyunAccount?.isActive, true);
    const masterProject = state.projects.find((project) => project.id === "master-agent");
    const reply = masterProject?.messages.at(-1);
    assert.ok(reply, "expected a fallback reply to be appended");
    assert.match(reply?.body ?? "", /阿里备用接管成功/);
  } finally {
    globalThis.fetch = originalFetch;
  }
});

test("replyToMasterAgentUserMessage falls back to a ready backup master node account when API backends are unavailable", async () => {
  await saveAiAccount({
    accountId: "master-codex-primary-offline",
    label: "主 GPT",
    role: "primary",
    provider: "master_codex_node",
    displayName: "离线主节点",
    nodeId: "offline-node",
    nodeLabel: "离线节点",
    model: "gpt-5.4",
    enabled: true,
    setActive: true,
    loginStatusNote: "离线主节点。",
  });

  await saveAiAccount({
    accountId: "master-codex-backup-ready",
    label: "备用主节点",
    role: "backup",
    provider: "master_codex_node",
    displayName: "在线备用 Master Codex Node",
    nodeId: "mac-studio",
    nodeLabel: "Mac Studio",
    model: "gpt-5.4",
    enabled: true,
    setActive: false,
    loginStatusNote: "在线备用主节点。",
  });

  const result = await replyToMasterAgentUserMessage({
    requestMessageId: "msg-master-node-backup-fallback",
    requestText: "请切到备用主节点。",
    requestedBy: "Boss 超级管理员",
    requestedByAccount: "17600003315",
    mode: "enqueue",
  });

  assert.equal(result.ok, true);
  assert.equal(result.accountId, "master-codex-backup-ready");
  assert.ok(result.taskId, "expected a queued master-agent task");

  const state = await readState();
  const task = state.masterAgentTasks.find((item) => item.taskId === result.taskId);
  assert.ok(task, "expected queued task to be written into state");
  assert.equal(task?.accountId, "master-codex-backup-ready");
  assert.equal(task?.deviceId, "mac-studio");
});