# Copyright (c) 2022 The Regents of the University of California
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import unittest
import os

from gem5.resources.workload import Workload, CustomWorkload
from gem5.resources.resource import (
    BinaryResource,
    DiskImageResource,
    obtain_resource,
)

from typing import Dict


class CustomWorkloadTestSuite(unittest.TestCase):
    """
    Tests the `gem5.resources.workload.CustomWorkload` class.
    """

    @classmethod
    def setUpClass(cls) -> None:

        os.environ["GEM5_RESOURCE_JSON"] = os.path.join(
            os.path.realpath(os.path.dirname(__file__)),
            "refs",
            "workload-checks-custom-workload.json",
        )

        cls.custom_workload = CustomWorkload(
            function="set_se_binary_workload",
            parameters={
                "binary": obtain_resource("x86-hello64-static"),
                "arguments": ["hello", 6],
            },
        )

    @classmethod
    def tearDownClass(cls):
        # Unset the environment variable so this test does not interfere with
        # others.
        os.environ["GEM5_RESOURCE_JSON"]

    def test_get_function_str(self) -> None:
        # Tests `CustomResource.get_function_str`

        self.assertEqual(
            "set_se_binary_workload", self.custom_workload.get_function_str()
        )

    def test_get_parameters(self) -> None:
        # Tests `CustomResource.get_parameter`

        parameters = self.custom_workload.get_parameters()
        self.assertTrue(isinstance(parameters, Dict))
        self.assertEquals(2, len(parameters))

        self.assertTrue("binary" in parameters)
        self.assertTrue(isinstance(parameters["binary"], BinaryResource))

        self.assertTrue("arguments" in parameters)
        self.assertTrue(isinstance(parameters["arguments"], list))
        self.assertEquals(2, len(parameters["arguments"]))
        self.assertEquals("hello", parameters["arguments"][0])
        self.assertEquals(6, parameters["arguments"][1])

    def test_add_parameters(self) -> None:
        # Tests `CustomResource.set_parameter` for the case where we add a new
        # parameter value.

        self.custom_workload.set_parameter("test_param", 10)

        self.assertTrue("test_param" in self.custom_workload.get_parameters())
        self.assertEquals(
            10, self.custom_workload.get_parameters()["test_param"]
        )

        # Cleanup
        del self.custom_workload.get_parameters()["test_param"]

    def test_override_parameter(self) -> None:
        # Tests `CustomResource.set_parameter` for the case where we override
        # a parameter's value.

        old_value = self.custom_workload.get_parameters()["binary"]

        self.custom_workload.set_parameter("binary", "test")
        self.assertTrue("binary" in self.custom_workload.get_parameters())
        self.assertEquals(
            "test", self.custom_workload.get_parameters()["binary"]
        )

        # We set the overridden parameter back to it's old value.
        self.custom_workload.set_parameter("binary", old_value)


class WorkloadTestSuite(unittest.TestCase):
    """
    Tests the `gem5.resources.workload.Workload` class.
    """

    @classmethod
    def setUpClass(cls):

        os.environ["GEM5_RESOURCE_JSON"] = os.path.join(
            os.path.realpath(os.path.dirname(__file__)),
            "refs",
            "workload-checks.json",
        )
        cls.workload = Workload("simple-boot")

    @classmethod
    def tearDownClass(cls):
        # Unset the environment variable so this test does not interfere with
        # others.
        os.environ["GEM5_RESOURCE_JSON"]

    def test_get_function_str(self) -> None:
        # Tests `Resource.get_function_str`

        self.assertEquals(
            "set_kernel_disk_workload", self.workload.get_function_str()
        )

    def test_get_parameters(self) -> None:
        # Tests `Resource.get_parameters`

        parameters = self.workload.get_parameters()

        self.assertTrue(isinstance(parameters, Dict))
        self.assertEqual(3, len(parameters))

        self.assertTrue("kernel" in parameters)
        self.assertTrue(isinstance(parameters["kernel"], BinaryResource))

        self.assertTrue("disk_image" in parameters)
        self.assertTrue(
            isinstance(parameters["disk_image"], DiskImageResource)
        )

        self.assertTrue("readfile_contents" in parameters)
        self.assertTrue(
            "echo 'Boot successful'; m5 exit", parameters["readfile_contents"]
        )

    def test_add_parameters(self) -> None:
        # Tests `Resource.set_parameter` for the case where we add a new
        # parameter value.

        self.workload.set_parameter("test_param", 10)

        self.assertTrue("test_param" in self.workload.get_parameters())
        self.assertEquals(10, self.workload.get_parameters()["test_param"])

        # Cleanup
        del self.workload.get_parameters()["test_param"]

    def test_override_parameter(self) -> None:
        # Tests `Resource.set_parameter` for the case where we override
        # a parameter's value.

        old_value = self.workload.get_parameters()["readfile_contents"]

        self.workload.set_parameter("readfile_contents", "test")
        self.assertTrue("readfile_contents" in self.workload.get_parameters())
        self.assertEquals(
            "test", self.workload.get_parameters()["readfile_contents"]
        )

        # We set the overridden parameter back to it's old value.
        self.workload.set_parameter("readfile_contents", old_value)