# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

import json
import os
import subprocess
import time
import unittest

import grpc
import numpy
import onnx_ml_pb2
import predict_pb2
import prediction_service_pb2_grpc
import requests
import test_util


class HttpJsonPayloadTests(unittest.TestCase):
    server_ip = "127.0.0.1"
    server_port = 54321
    url_pattern = "http://{0}:{1}/v1/models/{2}/versions/{3}:predict"
    server_app_path = ""
    test_data_path = ""
    model_path = ""
    log_level = "verbose"
    server_app_proc = None
    wait_server_ready_in_seconds = 1

    @classmethod
    def setUpClass(cls):
        onnx_model = os.path.join(cls.model_path, "model.onnx")
        test_util.prepare_mnist_model(onnx_model)
        cmd = [
            cls.server_app_path,
            "--http_port",
            str(cls.server_port),
            "--model_path",
            onnx_model,
            "--log_level",
            cls.log_level,
        ]
        test_util.test_log("Launching server app: [{0}]".format(" ".join(cmd)))
        cls.server_app_proc = subprocess.Popen(cmd)
        test_util.test_log("Server app PID: {0}".format(cls.server_app_proc.pid))
        test_util.test_log(
            "Sleep {0} second(s) to wait for server initialization".format(cls.wait_server_ready_in_seconds)
        )
        time.sleep(cls.wait_server_ready_in_seconds)

    @classmethod
    def tearDownClass(cls):
        test_util.test_log("Shutdown server app")
        cls.server_app_proc.kill()
        test_util.test_log(
            "PID {0} has been killed: {1}".format(
                cls.server_app_proc.pid, test_util.is_process_killed(cls.server_app_proc.pid)
            )
        )

    def test_mnist_happy_path(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.json")
        output_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_output.json")

        with open(input_data_file, "r") as f:
            request_payload = f.read()

        with open(output_data_file, "r") as f:
            expected_response_json = f.read()
            expected_response = json.loads(expected_response_json)

        request_headers = {
            "Content-Type": "application/json",
            "Accept": "application/json",
            "x-ms-client-request-id": "This~is~my~id",
        }

        url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
        test_util.test_log(url)
        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.headers.get("Content-Type"), "application/json")
        self.assertTrue(r.headers.get("x-ms-request-id"))
        self.assertEqual(r.headers.get("x-ms-client-request-id"), "This~is~my~id")

        actual_response = json.loads(r.content.decode("utf-8"))

        # Note:
        # The 'dims' field is defined as "repeated int64" in protobuf.
        # When it is serialized to JSON, all int64/fixed64/uint64 numbers are converted to string
        # Reference: https://developers.google.com/protocol-buffers/docs/proto3#json

        self.assertTrue(actual_response["outputs"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["dims"])
        self.assertEqual(actual_response["outputs"]["Plus214_Output_0"]["dims"], ["1", "10"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["dataType"])
        self.assertEqual(actual_response["outputs"]["Plus214_Output_0"]["dataType"], 1)
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["rawData"])
        actual_data = test_util.decode_base64_string(actual_response["outputs"]["Plus214_Output_0"]["rawData"], "10f")
        expected_data = test_util.decode_base64_string(
            expected_response["outputs"]["Plus214_Output_0"]["rawData"], "10f"
        )

        for i in range(0, 10):
            self.assertTrue(test_util.compare_floats(actual_data[i], expected_data[i]))

    def test_mnist_invalid_url(self):
        url = self.url_pattern.format(self.server_ip, self.server_port, "default", -1)
        test_util.test_log(url)

        request_headers = {"Content-Type": "application/json", "Accept": "application/json"}

        r = requests.post(url, headers=request_headers, data={"foo": "bar"})
        self.assertEqual(r.status_code, 404)
        self.assertEqual(r.headers.get("Content-Type"), "application/json")
        self.assertTrue(r.headers.get("x-ms-request-id"))

    def test_mnist_invalid_content_type(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.json")
        url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
        test_util.test_log(url)

        request_headers = {
            "Content-Type": "application/abc",
            "Accept": "application/json",
            "x-ms-client-request-id": "This~is~my~id",
        }

        with open(input_data_file, "r") as f:
            request_payload = f.read()

        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 400)
        self.assertEqual(r.headers.get("Content-Type"), "application/json")
        self.assertTrue(r.headers.get("x-ms-request-id"))
        self.assertEqual(r.headers.get("x-ms-client-request-id"), "This~is~my~id")
        self.assertEqual(
            r.content.decode("utf-8"),
            '{"error_code": 400, "error_message": "Missing or unknown \'Content-Type\' header field in the request"}\n',
        )

    def test_mnist_missing_content_type(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.json")
        url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
        test_util.test_log(url)

        request_headers = {"Accept": "application/json"}

        with open(input_data_file, "r") as f:
            request_payload = f.read()

        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 400)
        self.assertEqual(r.headers.get("Content-Type"), "application/json")
        self.assertTrue(r.headers.get("x-ms-request-id"))
        self.assertEqual(
            r.content.decode("utf-8"),
            '{"error_code": 400, "error_message": "Missing or unknown \'Content-Type\' header field in the request"}\n',
        )

    def test_single_model_shortcut(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.json")
        output_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_output.json")

        with open(input_data_file, "r") as f:
            request_payload = f.read()

        with open(output_data_file, "r") as f:
            expected_response_json = f.read()
            expected_response = json.loads(expected_response_json)

        request_headers = {
            "Content-Type": "application/json",
            "Accept": "application/json",
            "x-ms-client-request-id": "This~is~my~id",
        }

        url = "http://{0}:{1}/score".format(self.server_ip, self.server_port)
        test_util.test_log(url)
        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.headers.get("Content-Type"), "application/json")
        self.assertTrue(r.headers.get("x-ms-request-id"))
        self.assertEqual(r.headers.get("x-ms-client-request-id"), "This~is~my~id")

        actual_response = json.loads(r.content.decode("utf-8"))

        # Note:
        # The 'dims' field is defined as "repeated int64" in protobuf.
        # When it is serialized to JSON, all int64/fixed64/uint64 numbers are converted to string
        # Reference: https://developers.google.com/protocol-buffers/docs/proto3#json

        self.assertTrue(actual_response["outputs"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["dims"])
        self.assertEqual(actual_response["outputs"]["Plus214_Output_0"]["dims"], ["1", "10"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["dataType"])
        self.assertEqual(actual_response["outputs"]["Plus214_Output_0"]["dataType"], 1)
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["rawData"])
        actual_data = test_util.decode_base64_string(actual_response["outputs"]["Plus214_Output_0"]["rawData"], "10f")
        expected_data = test_util.decode_base64_string(
            expected_response["outputs"]["Plus214_Output_0"]["rawData"], "10f"
        )

        for i in range(0, 10):
            self.assertTrue(test_util.compare_floats(actual_data[i], expected_data[i]))

    def test_single_version_shortcut(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.json")
        output_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_output.json")

        with open(input_data_file, "r") as f:
            request_payload = f.read()

        with open(output_data_file, "r") as f:
            expected_response_json = f.read()
            expected_response = json.loads(expected_response_json)

        request_headers = {
            "Content-Type": "application/json",
            "Accept": "application/json",
            "x-ms-client-request-id": "This~is~my~id",
        }

        url = "http://{0}:{1}/v1/models/{2}:predict".format(self.server_ip, self.server_port, "default")
        test_util.test_log(url)
        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.headers.get("Content-Type"), "application/json")
        self.assertTrue(r.headers.get("x-ms-request-id"))
        self.assertEqual(r.headers.get("x-ms-client-request-id"), "This~is~my~id")

        actual_response = json.loads(r.content.decode("utf-8"))

        # Note:
        # The 'dims' field is defined as "repeated int64" in protobuf.
        # When it is serialized to JSON, all int64/fixed64/uint64 numbers are converted to string
        # Reference: https://developers.google.com/protocol-buffers/docs/proto3#json

        self.assertTrue(actual_response["outputs"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["dims"])
        self.assertEqual(actual_response["outputs"]["Plus214_Output_0"]["dims"], ["1", "10"])
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["dataType"])
        self.assertEqual(actual_response["outputs"]["Plus214_Output_0"]["dataType"], 1)
        self.assertTrue(actual_response["outputs"]["Plus214_Output_0"]["rawData"])
        actual_data = test_util.decode_base64_string(actual_response["outputs"]["Plus214_Output_0"]["rawData"], "10f")
        expected_data = test_util.decode_base64_string(
            expected_response["outputs"]["Plus214_Output_0"]["rawData"], "10f"
        )

        for i in range(0, 10):
            self.assertTrue(test_util.compare_floats(actual_data[i], expected_data[i]))


class HttpProtobufPayloadTests(unittest.TestCase):
    server_ip = "127.0.0.1"
    server_port = 54321
    url_pattern = "http://{0}:{1}/v1/models/{2}/versions/{3}:predict"
    server_app_path = ""
    test_data_path = ""
    model_path = ""
    log_level = "verbose"
    server_app_proc = None
    wait_server_ready_in_seconds = 1

    @classmethod
    def setUpClass(cls):
        onnx_model = os.path.join(cls.model_path, "model.onnx")
        test_util.prepare_mnist_model(onnx_model)
        cmd = [
            cls.server_app_path,
            "--http_port",
            str(cls.server_port),
            "--model_path",
            onnx_model,
            "--log_level",
            cls.log_level,
        ]
        test_util.test_log("Launching server app: [{0}]".format(" ".join(cmd)))
        cls.server_app_proc = subprocess.Popen(cmd)
        test_util.test_log("Server app PID: {0}".format(cls.server_app_proc.pid))
        test_util.test_log(
            "Sleep {0} second(s) to wait for server initialization".format(cls.wait_server_ready_in_seconds)
        )
        time.sleep(cls.wait_server_ready_in_seconds)

    @classmethod
    def tearDownClass(cls):
        test_util.test_log("Shutdown server app")
        cls.server_app_proc.kill()
        test_util.test_log(
            "PID {0} has been killed: {1}".format(
                cls.server_app_proc.pid, test_util.is_process_killed(cls.server_app_proc.pid)
            )
        )

    def test_mnist_happy_path(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.pb")
        output_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_output.pb")

        with open(input_data_file, "rb") as f:
            request_payload = f.read()

        content_type_headers = ["application/x-protobuf", "application/octet-stream", "application/vnd.google.protobuf"]

        for h in content_type_headers:
            request_headers = {"Content-Type": h, "Accept": "application/x-protobuf"}

            url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
            test_util.test_log(url)
            r = requests.post(url, headers=request_headers, data=request_payload)
            self.assertEqual(r.status_code, 200)
            self.assertEqual(r.headers.get("Content-Type"), "application/x-protobuf")
            self.assertTrue(r.headers.get("x-ms-request-id"))

            actual_result = predict_pb2.PredictResponse()
            actual_result.ParseFromString(r.content)

            expected_result = predict_pb2.PredictResponse()
            with open(output_data_file, "rb") as f:
                expected_result.ParseFromString(f.read())

            for k in expected_result.outputs.keys():
                self.assertEqual(actual_result.outputs[k].data_type, expected_result.outputs[k].data_type)

            count = 1
            for i in range(0, len(expected_result.outputs["Plus214_Output_0"].dims)):
                self.assertEqual(
                    actual_result.outputs["Plus214_Output_0"].dims[i],
                    expected_result.outputs["Plus214_Output_0"].dims[i],
                )
                count = count * int(actual_result.outputs["Plus214_Output_0"].dims[i])

            actual_array = numpy.frombuffer(actual_result.outputs["Plus214_Output_0"].raw_data, dtype=numpy.float32)
            expected_array = numpy.frombuffer(expected_result.outputs["Plus214_Output_0"].raw_data, dtype=numpy.float32)
            self.assertEqual(len(actual_array), len(expected_array))
            self.assertEqual(len(actual_array), count)
            for i in range(0, count):
                self.assertTrue(test_util.compare_floats(actual_array[i], expected_array[i], rel_tol=0.001))

    def test_respect_accept_header(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.pb")

        with open(input_data_file, "rb") as f:
            request_payload = f.read()

        accept_headers = ["application/x-protobuf", "application/octet-stream", "application/vnd.google.protobuf"]

        for h in accept_headers:
            request_headers = {"Content-Type": "application/x-protobuf", "Accept": h}

            url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
            test_util.test_log(url)
            r = requests.post(url, headers=request_headers, data=request_payload)
            self.assertEqual(r.status_code, 200)
            self.assertEqual(r.headers.get("Content-Type"), h)

    def test_missing_accept_header(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.pb")

        with open(input_data_file, "rb") as f:
            request_payload = f.read()

        request_headers = {
            "Content-Type": "application/x-protobuf",
        }

        url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
        test_util.test_log(url)
        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.headers.get("Content-Type"), "application/octet-stream")

    def test_any_accept_header(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.pb")

        with open(input_data_file, "rb") as f:
            request_payload = f.read()

        request_headers = {"Content-Type": "application/x-protobuf", "Accept": "*/*"}

        url = self.url_pattern.format(self.server_ip, self.server_port, "default", 1)
        test_util.test_log(url)
        r = requests.post(url, headers=request_headers, data=request_payload)
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.headers.get("Content-Type"), "application/octet-stream")


class HttpEndpointTests(unittest.TestCase):
    server_ip = "127.0.0.1"
    server_port = 54321
    server_app_path = ""
    test_data_path = ""
    model_path = ""
    log_level = "verbose"
    server_app_proc = None
    wait_server_ready_in_seconds = 1

    @classmethod
    def setUpClass(cls):
        onnx_model = os.path.join(cls.model_path, "model.onnx")
        test_util.prepare_mnist_model(onnx_model)
        cmd = [
            cls.server_app_path,
            "--http_port",
            str(cls.server_port),
            "--model_path",
            onnx_model,
            "--log_level",
            cls.log_level,
        ]
        test_util.test_log("Launching server app: [{0}]".format(" ".join(cmd)))
        cls.server_app_proc = subprocess.Popen(cmd)
        test_util.test_log("Server app PID: {0}".format(cls.server_app_proc.pid))
        test_util.test_log(
            "Sleep {0} second(s) to wait for server initialization".format(cls.wait_server_ready_in_seconds)
        )
        time.sleep(cls.wait_server_ready_in_seconds)

    @classmethod
    def tearDownClass(cls):
        test_util.test_log("Shutdown server app")
        cls.server_app_proc.kill()
        test_util.test_log(
            "PID {0} has been killed: {1}".format(
                cls.server_app_proc.pid, test_util.is_process_killed(cls.server_app_proc.pid)
            )
        )

    def test_health_endpoint(self):
        url = url = "http://{0}:{1}/".format(self.server_ip, self.server_port)
        test_util.test_log(url)
        r = requests.get(url)
        self.assertEqual(r.status_code, 200)
        self.assertEqual(r.content.decode("utf-8"), "Healthy")


class GRPCTests(unittest.TestCase):
    server_ip = "127.0.0.1"
    server_port = 54321
    server_app_path = ""
    test_data_path = ""
    model_path = ""
    log_level = "verbose"
    server_app_proc = None
    wait_server_ready_in_seconds = 1

    @classmethod
    def setUpClass(cls):
        onnx_model = os.path.join(cls.model_path, "model.onnx")
        test_util.prepare_mnist_model(onnx_model)
        cmd = [
            cls.server_app_path,
            "--grpc_port",
            str(cls.server_port),
            "--model_path",
            onnx_model,
            "--log_level",
            cls.log_level,
        ]
        test_util.test_log("Launching server app: [{0}]".format(" ".join(cmd)))
        cls.server_app_proc = subprocess.Popen(cmd)
        test_util.test_log("Server app PID: {0}".format(cls.server_app_proc.pid))
        test_util.test_log(
            "Sleep {0} second(s) to wait for server initialization".format(cls.wait_server_ready_in_seconds)
        )
        time.sleep(cls.wait_server_ready_in_seconds)

    @classmethod
    def tearDownClass(cls):
        test_util.test_log("Shutdown server app")
        cls.server_app_proc.kill()
        test_util.test_log(
            "PID {0} has been killed: {1}".format(
                cls.server_app_proc.pid, test_util.is_process_killed(cls.server_app_proc.pid)
            )
        )

    def test_mnist_happy_path(self):
        input_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_input.pb")
        output_data_file = os.path.join(self.test_data_path, "mnist_test_data_set_0_output.pb")

        with open(input_data_file, "rb") as f:
            request_payload = f.read()

        request = predict_pb2.PredictRequest()
        request.ParseFromString(request_payload)
        uri = "{}:{}".format(self.server_ip, self.server_port)
        test_util.test_log(uri)
        with grpc.insecure_channel(uri) as channel:
            stub = prediction_service_pb2_grpc.PredictionServiceStub(channel)
            actual_result = stub.Predict(request)

        expected_result = predict_pb2.PredictResponse()
        with open(output_data_file, "rb") as f:
            expected_result.ParseFromString(f.read())

        for k in expected_result.outputs.keys():
            self.assertEqual(actual_result.outputs[k].data_type, expected_result.outputs[k].data_type)

        count = 1
        for i in range(0, len(expected_result.outputs["Plus214_Output_0"].dims)):
            self.assertEqual(
                actual_result.outputs["Plus214_Output_0"].dims[i], expected_result.outputs["Plus214_Output_0"].dims[i]
            )
            count = count * int(actual_result.outputs["Plus214_Output_0"].dims[i])

        actual_array = numpy.frombuffer(actual_result.outputs["Plus214_Output_0"].raw_data, dtype=numpy.float32)
        expected_array = numpy.frombuffer(expected_result.outputs["Plus214_Output_0"].raw_data, dtype=numpy.float32)
        self.assertEqual(len(actual_array), len(expected_array))
        self.assertEqual(len(actual_array), count)
        for i in range(0, count):
            self.assertTrue(test_util.compare_floats(actual_array[i], expected_array[i], rel_tol=0.001))


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