#!/usr/bin/env python
#
#  Copyright (c) 2016, The OpenThread Authors.
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import unittest
import ctypes

class GUID(ctypes.Structure):
    _fields_ = [("Data1", ctypes.c_uint),
                ("Data2", ctypes.c_ushort),
                ("Data3", ctypes.c_ushort),
                ("Data4", ctypes.c_ubyte * 8)]
    
class otDeviceList(ctypes.Structure):
    _fields_ = [("aDevicesLength", ctypes.c_ushort),
                ("aDevices", GUID * 64)]

class Cert_otLwf(unittest.TestCase):
    def setUp(self):

        # Load the DLL
        self.Api = ctypes.WinDLL("otApi.dll")
        if self.Api == None:
            raise OSError("Failed to load otApi.dll!")
        
        # Define the functions
        self.Api.otApiInit.restype = ctypes.c_void_p
        self.Api.otApiFinalize.argtypes = [ctypes.c_void_p]
        self.Api.otApiFinalize.restype = None
        self.Api.otFreeMemory.argtypes = [ctypes.c_void_p]
        self.Api.otFreeMemory.restype = None
        self.Api.otEnumerateDevices.argtypes = [ctypes.c_void_p]
        self.Api.otEnumerateDevices.restype = ctypes.POINTER(otDeviceList)

    def tearDown(self):
        if self.ApiInstance:
            self.Api.otApiFinalize(self.ApiInstance)

    def test(self):
        # Instantiate the API
        self.ApiInstance = self.Api.otApiInit()
        # Assert that it didn't return NULL
        self.assertNotEqual(self.ApiInstance, None)
        # Query the device list
        devices = self.Api.otEnumerateDevices(self.ApiInstance)
        # Assert that it didn't return NULL
        self.assertNotEqual(devices, None)
        # Print the number of devices
        print("devices found: %d" % devices.contents.aDevicesLength)

if __name__ == '__main__':
    unittest.main()