import test from "node:test";
import assert from "node:assert/strict";
import os from "node:os";
import path from "node:path";
import { mkdtemp, rm, writeFile } from "node:fs/promises";
import { NextRequest } from "next/server";

let runtimeRoot = "";
let AUTH_SESSION_COOKIE = "";
let createAuthSession: (typeof import("../src/lib/boss-data"))["createAuthSession"];
let readState: (typeof import("../src/lib/boss-data"))["readState"];
let orchestrationBackendRoute: typeof import("../src/app/api/v1/projects/[projectId]/orchestration-backend/route");

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

  runtimeRoot = await mkdtemp(path.join(os.tmpdir(), "boss-orchestration-backend-route-"));
  process.env.BOSS_RUNTIME_ROOT = runtimeRoot;
  process.env.BOSS_STATE_FILE = path.join(runtimeRoot, "boss-state.json");

  const [data, auth, routeModule] = await Promise.all([
    import("../src/lib/boss-data.ts"),
    import("../src/lib/boss-auth.ts"),
    import("../src/app/api/v1/projects/[projectId]/orchestration-backend/route.ts"),
  ]);

  createAuthSession = data.createAuthSession;
  readState = data.readState;
  AUTH_SESSION_COOKIE = auth.AUTH_SESSION_COOKIE;
  orchestrationBackendRoute = routeModule;
}

async function createAuthedHeaders() {
  await setup();
  const session = await createAuthSession({
    account: "17600003315",
    role: "highest_admin",
    displayName: "Boss 超级管理员",
    loginMethod: "password",
  });

  return {
    cookie: `${AUTH_SESSION_COOKIE}=${session.sessionToken}`,
    "content-type": "application/json",
  };
}

function snapshotOmxEnv() {
  return {
    BOSS_OMX_ENABLED: process.env.BOSS_OMX_ENABLED,
    BOSS_OMX_COMMAND: process.env.BOSS_OMX_COMMAND,
    BOSS_OMX_ARGS: process.env.BOSS_OMX_ARGS,
    BOSS_OMX_WORKDIR: process.env.BOSS_OMX_WORKDIR,
  };
}

function restoreOmxEnv(snapshot: ReturnType<typeof snapshotOmxEnv>) {
  for (const [key, value] of Object.entries(snapshot)) {
    if (value === undefined) {
      delete process.env[key];
    } else {
      process.env[key] = value;
    }
  }
}

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

test("GET /api/v1/projects/[projectId]/orchestration-backend returns current choice and OMX availability", async () => {
  await setup();
  const tempDir = await mkdtemp(path.join(os.tmpdir(), "boss-orchestration-backend-omx-"));
  const scriptPath = path.join(tempDir, "omx-team-smoke.mjs");
  await writeFile(scriptPath, "console.log('ok');\n", "utf8");
  const previousEnv = snapshotOmxEnv();
  process.env.BOSS_OMX_ENABLED = "true";
  process.env.BOSS_OMX_COMMAND = process.execPath;
  process.env.BOSS_OMX_ARGS = scriptPath;
  process.env.BOSS_OMX_WORKDIR = tempDir;

  try {
    const response = await orchestrationBackendRoute.GET(
      new NextRequest("http://127.0.0.1:3000/api/v1/projects/audit-collab/orchestration-backend", {
        method: "GET",
        headers: await createAuthedHeaders(),
      }),
      { params: Promise.resolve({ projectId: "audit-collab" }) },
    );

    assert.equal(response.status, 200);
    const payload = (await response.json()) as {
      ok: boolean;
      projectId: string;
      currentBackendId: string;
      requestedBackendId: string | null;
      availableChoices: Array<{ backendId: string; selectable: boolean; current: boolean }>;
      omxAvailability: { selectable: boolean; reason: string };
    };

    assert.equal(payload.ok, true);
    assert.equal(payload.projectId, "audit-collab");
    assert.equal(payload.currentBackendId, "boss-native-orchestrator");
    assert.equal(payload.requestedBackendId, null);
    assert.deepEqual(
      payload.availableChoices.map((choice) => choice.backendId),
      ["boss-native-orchestrator", "omx-team"],
    );
    assert.equal(payload.availableChoices[0]?.current, true);
    assert.equal(payload.availableChoices[1]?.selectable, true);
    assert.equal(payload.omxAvailability.selectable, true);
    assert.equal(payload.omxAvailability.reason, "ready");
  } finally {
    restoreOmxEnv(previousEnv);
    await rm(tempDir, { recursive: true, force: true });
  }
});

test("PATCH /api/v1/projects/[projectId]/orchestration-backend persists OMX selection when selectable", async () => {
  await setup();
  const tempDir = await mkdtemp(path.join(os.tmpdir(), "boss-orchestration-backend-omx-"));
  const scriptPath = path.join(tempDir, "omx-team-smoke.mjs");
  await writeFile(scriptPath, "console.log('ok');\n", "utf8");
  const previousEnv = snapshotOmxEnv();
  process.env.BOSS_OMX_ENABLED = "true";
  process.env.BOSS_OMX_COMMAND = process.execPath;
  process.env.BOSS_OMX_ARGS = scriptPath;
  process.env.BOSS_OMX_WORKDIR = tempDir;

  try {
    const response = await orchestrationBackendRoute.PATCH(
      new NextRequest("http://127.0.0.1:3000/api/v1/projects/audit-collab/orchestration-backend", {
        method: "PATCH",
        headers: await createAuthedHeaders(),
        body: JSON.stringify({ orchestrationBackendOverride: "omx-team" }),
      }),
      { params: Promise.resolve({ projectId: "audit-collab" }) },
    );

    assert.equal(response.status, 200);
    const payload = (await response.json()) as {
      ok: boolean;
      currentBackendId: string;
      requestedBackendId: string;
      omxAvailability: { selectable: boolean };
    };
    assert.equal(payload.ok, true);
    assert.equal(payload.currentBackendId, "omx-team");
    assert.equal(payload.requestedBackendId, "omx-team");
    assert.equal(payload.omxAvailability.selectable, true);

    const state = await readState();
    const project = state.projects.find((item) => item.id === "audit-collab");
    assert.equal(project?.orchestrationBackendOverride, "omx-team");
  } finally {
    restoreOmxEnv(previousEnv);
    await rm(tempDir, { recursive: true, force: true });
  }
});

test("PATCH /api/v1/projects/[projectId]/orchestration-backend falls back to native when OMX is unavailable", async () => {
  await setup();
  const previousEnv = snapshotOmxEnv();
  delete process.env.BOSS_OMX_ENABLED;
  delete process.env.BOSS_OMX_COMMAND;
  delete process.env.BOSS_OMX_ARGS;
  delete process.env.BOSS_OMX_WORKDIR;

  try {
    const response = await orchestrationBackendRoute.PATCH(
      new NextRequest("http://127.0.0.1:3000/api/v1/projects/audit-collab/orchestration-backend", {
        method: "PATCH",
        headers: await createAuthedHeaders(),
        body: JSON.stringify({ orchestrationBackendOverride: "omx-team" }),
      }),
      { params: Promise.resolve({ projectId: "audit-collab" }) },
    );

    assert.equal(response.status, 200);
    const payload = (await response.json()) as {
      ok: boolean;
      currentBackendId: string;
      requestedBackendId: string;
      omxAvailability: { selectable: boolean; reasonLabel: string };
    };
    assert.equal(payload.ok, true);
    assert.equal(payload.requestedBackendId, "omx-team");
    assert.equal(payload.currentBackendId, "boss-native-orchestrator");
    assert.equal(payload.omxAvailability.selectable, false);
    assert.equal(payload.omxAvailability.reasonLabel, "OMX Team Runtime 当前未启用。");

    const state = await readState();
    const project = state.projects.find((item) => item.id === "audit-collab");
    assert.equal(project?.orchestrationBackendOverride, "omx-team");
  } finally {
    restoreOmxEnv(previousEnv);
  }
});