import test from "node:test";
import assert from "node:assert/strict";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";

const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-virtual-auto-"));
const ORIGINAL_DATA_DIR = process.env.DATA_DIR;

process.env.DATA_DIR = TEST_DATA_DIR;

const core = await import("../../src/lib/db/core.ts");
const providersDb = await import("../../src/lib/db/providers.ts");
const virtualFactory = await import("../../open-sse/services/autoCombo/virtualFactory.ts");

type VirtualComboResult = Awaited<ReturnType<typeof virtualFactory.createVirtualAutoCombo>>;

async function resetStorage() {
  core.resetDbInstance();
  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
  fs.mkdirSync(TEST_DATA_DIR, { recursive: true });
}

test.beforeEach(async () => {
  await resetStorage();
});

test.after(async () => {
  await resetStorage();
  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });

  if (ORIGINAL_DATA_DIR === undefined) {
    delete process.env.DATA_DIR;
  } else {
    process.env.DATA_DIR = ORIGINAL_DATA_DIR;
  }
});

test("createVirtualAutoCombo returns an executable auto combo for API-key connections", async () => {
  await providersDb.createProviderConnection({
    provider: "openai",
    authType: "apikey",
    name: "OpenAI",
    apiKey: "sk-test-openai",
    defaultModel: "gpt-4o-mini",
  });

  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("fast");

  assert.equal(combo.strategy, "auto");
  assert.ok(combo.models.length >= 1);
  assert.equal(combo.models[0].kind, "model");
  assert.equal(combo.models[0].model, "openai/gpt-4o-mini");
  assert.equal(combo.models[0].providerId, "openai");
  assert.equal(combo.autoConfig.routerStrategy, "lkgp");
  assert.ok(combo.autoConfig.candidatePool.includes("openai"));
});

test("createVirtualAutoCombo includes OAuth accessToken connections with real expiry fields", async () => {
  await providersDb.createProviderConnection({
    provider: "anthropic",
    authType: "oauth",
    email: "oauth@example.com",
    accessToken: "oauth-access-token",
    tokenExpiresAt: new Date(Date.now() + 60_000).toISOString(),
    defaultModel: "claude-sonnet-4-5",
  });

  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("coding");

  assert.equal(combo.strategy, "auto");
  assert.ok(combo.models.length >= 1);
  assert.equal(combo.models[0].model, "anthropic/claude-sonnet-4-5");
  assert.ok(combo.autoConfig.candidatePool.includes("anthropic"));
});

test("createVirtualAutoCombo includes configured web-session providers without apiKey fields", async () => {
  await providersDb.createProviderConnection({
    provider: "qwen-web",
    authType: "apikey",
    name: "Qwen Web Session",
    providerSpecificData: { token: "qwen-web-session-token" },
    defaultModel: "qwen3-coder-plus",
  });

  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("coding");

  const qwenWeb = combo.models.find((model) => model.providerId === "qwen-web");
  assert.ok(qwenWeb, "configured web-session providers should be auto-combo candidates");
  assert.equal(qwenWeb.model, "qwen-web/qwen3-coder-plus");
  assert.ok(combo.autoConfig.candidatePool.includes("qwen-web"));
});

test("createVirtualAutoCombo excludes web-session providers with empty required token data", async () => {
  await providersDb.createProviderConnection({
    provider: "qwen-web",
    authType: "apikey",
    name: "Qwen Web Empty Session",
    providerSpecificData: { token: "   " },
    defaultModel: "qwen3-coder-plus",
  });

  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("coding");

  assert.equal(
    combo.models.some((model) => model.providerId === "qwen-web"),
    false,
    "web-session providers with empty required token data must not be auto-combo candidates"
  );
  assert.equal(combo.autoConfig.candidatePool.includes("qwen-web"), false);
});

test("createVirtualAutoCombo excludes web-session providers with irrelevant providerSpecificData", async () => {
  await providersDb.createProviderConnection({
    provider: "chatgpt-web",
    authType: "apikey",
    name: "ChatGPT Web Invalid Session",
    providerSpecificData: { unrelated: "value" },
    defaultModel: "gpt-4o",
  });

  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("coding");

  assert.equal(
    combo.models.some((model) => model.providerId === "chatgpt-web"),
    false,
    "web-session providers with irrelevant providerSpecificData must not be auto-combo candidates"
  );
  assert.equal(combo.autoConfig.candidatePool.includes("chatgpt-web"), false);
});

test("createVirtualAutoCombo includes cookie web-session providers with required cookie data", async () => {
  await providersDb.createProviderConnection({
    provider: "chatgpt-web",
    authType: "apikey",
    name: "ChatGPT Web Session",
    providerSpecificData: { cookie: "__Secure-next-auth.session-token=chatgpt-session" },
    defaultModel: "gpt-4o",
  });

  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("coding");

  const chatgptWeb = combo.models.find((model) => model.providerId === "chatgpt-web");
  assert.ok(chatgptWeb, "cookie web-session providers with required cookie data should be candidates");
  assert.equal(chatgptWeb.model, "chatgpt-web/gpt-4o");
  assert.ok(combo.autoConfig.candidatePool.includes("chatgpt-web"));
});

test("createVirtualAutoCombo includes no-auth OpenCode Free without provider_connections rows", async () => {
  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("fast");

  const opencode = combo.models.find((model) => model.providerId === "opencode");
  assert.ok(
    opencode,
    "OpenCode Free should appear in auto/* even when it has no provider_connections row"
  );
  assert.equal(opencode.connectionId, "noauth");
  assert.equal(opencode.model, "oc/big-pickle");
  assert.ok(combo.autoConfig.candidatePool.includes("opencode"));
});

test("createVirtualAutoCombo includes all chat-capable no-auth providers without connections", async () => {
  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("fast");

  const byProvider = new Map(combo.models.map((model) => [model.providerId, model]));

  assert.equal(byProvider.get("duckduckgo-web")?.connectionId, "noauth");
  assert.equal(byProvider.get("duckduckgo-web")?.model, "ddgw/gpt-4o-mini");
  assert.equal(byProvider.get("theoldllm")?.connectionId, "noauth");
  assert.equal(byProvider.get("theoldllm")?.model, "tllm/GPT_5_4");
  assert.equal(byProvider.get("chipotle")?.connectionId, "noauth");
  assert.equal(byProvider.get("chipotle")?.model, "pepper/pepper-1");
  assert.equal(
    byProvider.has("veoaifree-web"),
    false,
    "video-only no-auth providers must not be inserted into chat auto-combos"
  );
});

test("createVirtualAutoCombo keeps credential-required providers out when disconnected", async () => {
  const combo: VirtualComboResult = await virtualFactory.createVirtualAutoCombo("fast");

  assert.equal(
    combo.models.some((model) => model.providerId === "openai"),
    false,
    "OpenAI should still require a real active connection"
  );
});