import { execFileSync } from 'child_process'
import { describe, expect, it } from 'vitest'

function runPython(script: string): any {
  try {
    const output = execFileSync(process.platform === 'win32' ? 'python' : 'python3', ['-c', script], {
      cwd: process.cwd(),
      encoding: 'utf-8',
      stdio: 'pipe',
    })
    return JSON.parse(output)
  } catch (error) {
    const err = error as { stdout?: string; stderr?: string; message?: string }
    throw new Error([
      err.message || 'Python bridge transport script failed',
      err.stdout ? `stdout:\n${err.stdout}` : '',
      err.stderr ? `stderr:\n${err.stderr}` : '',
    ].filter(Boolean).join('\n\n'))
  }
}

describe('agent bridge worker endpoint', () => {
  it('avoids high dynamic worker port bases on Windows', () => {
    const result = runPython(String.raw`
import importlib.util
import json
import os
import sys
import types

bridge_runtime = types.ModuleType("bridge_runtime")
bridge_runtime._hidden_subprocess_kwargs = lambda: {}
bridge_runtime._json_line_bytes = lambda req: (json.dumps(req) + "\n").encode("utf-8")
bridge_runtime._platform_text_encoding = lambda: "utf-8"
sys.modules["bridge_runtime"] = bridge_runtime

spec = importlib.util.spec_from_file_location(
    "bridge_transport",
    "packages/server/src/services/hermes/agent-bridge/python/bridge_transport.py",
)
bridge_transport = importlib.util.module_from_spec(spec)
assert spec.loader is not None
spec.loader.exec_module(bridge_transport)

original_name = bridge_transport.os.name
original_env = os.environ.get("HERMES_AGENT_BRIDGE_WORKER_PORT_BASE")
try:
    bridge_transport.os.name = "nt"
    os.environ["HERMES_AGENT_BRIDGE_WORKER_PORT_BASE"] = "50813"
    endpoint = bridge_transport._worker_endpoint("default", "tcp://127.0.0.1:56618")
finally:
    bridge_transport.os.name = original_name
    if original_env is None:
        os.environ.pop("HERMES_AGENT_BRIDGE_WORKER_PORT_BASE", None)
    else:
        os.environ["HERMES_AGENT_BRIDGE_WORKER_PORT_BASE"] = original_env

port = int(endpoint.rsplit(":", 1)[1])
print(json.dumps({"endpoint": endpoint, "port": port}))
`)

    expect(result.endpoint).toMatch(/^tcp:\/\/127\.0\.0\.1:\d+$/)
    expect(result.port).toBeGreaterThanOrEqual(18780)
    expect(result.port).toBeLessThan(19780)
  })

  it('avoids worker ports that enter the Windows dynamic range after hash offset', () => {
    const result = runPython(String.raw`
import importlib.util
import json
import os
import sys
import types

bridge_runtime = types.ModuleType("bridge_runtime")
bridge_runtime._hidden_subprocess_kwargs = lambda: {}
bridge_runtime._json_line_bytes = lambda req: (json.dumps(req) + "\n").encode("utf-8")
bridge_runtime._platform_text_encoding = lambda: "utf-8"
sys.modules["bridge_runtime"] = bridge_runtime

spec = importlib.util.spec_from_file_location(
    "bridge_transport",
    "packages/server/src/services/hermes/agent-bridge/python/bridge_transport.py",
)
bridge_transport = importlib.util.module_from_spec(spec)
assert spec.loader is not None
spec.loader.exec_module(bridge_transport)

original_name = bridge_transport.os.name
original_env = os.environ.get("HERMES_AGENT_BRIDGE_WORKER_PORT_BASE")
try:
    bridge_transport.os.name = "nt"
    os.environ["HERMES_AGENT_BRIDGE_WORKER_PORT_BASE"] = "49000"
    endpoint = bridge_transport._worker_endpoint("default", "tcp://127.0.0.1:56618")
finally:
    bridge_transport.os.name = original_name
    if original_env is None:
        os.environ.pop("HERMES_AGENT_BRIDGE_WORKER_PORT_BASE", None)
    else:
        os.environ["HERMES_AGENT_BRIDGE_WORKER_PORT_BASE"] = original_env

port = int(endpoint.rsplit(":", 1)[1])
print(json.dumps({"endpoint": endpoint, "port": port}))
`)

    expect(result.endpoint).toMatch(/^tcp:\/\/127\.0\.0\.1:\d+$/)
    expect(result.port).toBeGreaterThanOrEqual(18780)
    expect(result.port).toBeLessThan(19780)
  })
})