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 preserves multiple same-provider web-session candidates", async () => {
  const connA = await providersDb.createProviderConnection({
    provider: "qwen-web",
    authType: "apikey",
    name: "Qwen Web Session A",
    providerSpecificData: { token: "qwen-web-session-token-a" },
    defaultModel: "qwen3-coder-plus",
  });
  const connB = await providersDb.createProviderConnection({
    provider: "qwen-web",
    authType: "apikey",
    name: "Qwen Web Session B",
    providerSpecificData: { token: "qwen-web-session-token-b" },
    defaultModel: "qwen3-coder-plus",
  });

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

  const qwenWebModels = combo.models.filter((model) => model.providerId === "qwen-web");
  assert.equal(
    qwenWebModels.length,
    2,
    "same-provider web sessions must not collapse to one target"
  );
  assert.deepEqual(
    new Set(qwenWebModels.map((model) => model.connectionId)),
    new Set([connA.id, connB.id]),
    "same-provider web sessions should map back to their exact provider_connection rows"
  );
  assert.ok(qwenWebModels.every((model) => model.model === "qwen-web/qwen3-coder-plus"));
  assert.equal(
    combo.autoConfig.candidatePool.filter((provider) => provider === "qwen-web").length,
    1,
    "provider pool remains provider-scoped while model entries preserve connection identity"
  );
});

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");

  // Each noAuth provider should have multiple models (not just the first)
  const ddgwModels = combo.models.filter((m) => m.providerId === "duckduckgo-web");
  assert.ok(ddgwModels.length >= 1, "duckduckgo-web should have at least one model");
  assert.ok(ddgwModels.every((m) => m.connectionId === "noauth"), "all ddgw models should use noauth connection");
  assert.ok(ddgwModels.some((m) => m.model.startsWith("ddgw/")), "ddgw models should have correct prefix");

  const tllmModels = combo.models.filter((m) => m.providerId === "theoldllm");
  assert.ok(tllmModels.length >= 1, "theoldllm should have at least one model");
  assert.ok(tllmModels.every((m) => m.connectionId === "noauth"), "all tllm models should use noauth connection");
  assert.ok(tllmModels.some((m) => m.model === "tllm/GPT_5_4"), "tllm should include GPT_5_4");

  const chipotleModels = combo.models.filter((m) => m.providerId === "chipotle");
  assert.ok(chipotleModels.length >= 1, "chipotle should have at least one model");
  assert.ok(chipotleModels.every((m) => m.connectionId === "noauth"), "all chipotle models should use noauth connection");

  assert.equal(
    combo.models.some((model) => model.providerId === "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"
  );
});