#include "fan_pwm.hpp"
#include "hwmonio_mock.hpp"

#include <sdbusplus/test/sdbus_mock.hpp>
#include <string>

#include <gmock/gmock.h>
#include <gtest/gtest.h>

using ::testing::_;
using ::testing::Invoke;
using ::testing::IsNull;
using ::testing::NotNull;
using ::testing::Return;
using ::testing::StrEq;

static auto FanPwmIntf = "xyz.openbmc_project.Control.FanPwm";
static auto FanPwmProp = "Target";

// Handle basic expectations we'll need for all these tests, if it's found that
// this is helpful for more tests, it can be promoted in scope.
void SetupDbusObject(sdbusplus::SdBusMock *sdbus_mock, const std::string &path,
                     const std::string &intf, const std::string property = "")
{
    EXPECT_CALL(*sdbus_mock,
                sd_bus_add_object_vtable(IsNull(), NotNull(), StrEq(path),
                                         StrEq(intf), NotNull(), NotNull()))
        .WillOnce(Return(0));

    if (property.empty())
    {
        EXPECT_CALL(*sdbus_mock,
                    sd_bus_emit_properties_changed_strv(IsNull(), StrEq(path),
                                                        StrEq(intf), NotNull()))
            .WillOnce(Return(0));
    }
    else
    {
        EXPECT_CALL(*sdbus_mock,
                    sd_bus_emit_properties_changed_strv(IsNull(), StrEq(path),
                                                        StrEq(intf), NotNull()))
            .WillOnce(Invoke([=](sd_bus *bus, const char *path,
                                 const char *interface, char **names) {
                EXPECT_STREQ(property.c_str(), names[0]);
                return 0;
            }));
    }

    return;
}

TEST(FanPwmTest, BasicConstructorDeferredTest)
{
    // Attempt to just instantiate one.

    // NOTE: This test's goal is to figure out what's minimally required to
    // mock to instantiate this object.
    sdbusplus::SdBusMock sdbus_mock;
    auto bus_mock = sdbusplus::get_mocked_new(&sdbus_mock);

    std::string instancePath = "";
    std::string devPath = "";
    std::string id = "";
    std::string objPath = "asdf";
    bool defer = true;
    uint64_t target = 0x01;

    std::unique_ptr<hwmonio::HwmonIOInterface> hwmonio_mock =
        std::make_unique<hwmonio::HwmonIOMock>();

    SetupDbusObject(&sdbus_mock, objPath, FanPwmIntf, FanPwmProp);

    hwmon::FanPwm f(std::move(hwmonio_mock), devPath, id, bus_mock,
                    objPath.c_str(), defer, target);
}

TEST(FanPwmTest, BasicConstructorNotDeferredTest)
{
    // Attempt to just instantiate one.

    // NOTE: This test's goal is to figure out what's minimally required to
    // mock to instantiate this object.
    sdbusplus::SdBusMock sdbus_mock;
    auto bus_mock = sdbusplus::get_mocked_new(&sdbus_mock);

    std::string instancePath = "";
    std::string devPath = "";
    std::string id = "";
    std::string objPath = "asdf";
    bool defer = false;
    uint64_t target = 0x01;

    std::unique_ptr<hwmonio::HwmonIOInterface> hwmonio_mock =
        std::make_unique<hwmonio::HwmonIOMock>();

    SetupDbusObject(&sdbus_mock, objPath, FanPwmIntf, FanPwmProp);

    EXPECT_CALL(sdbus_mock, sd_bus_emit_object_added(IsNull(), StrEq("asdf")))
        .WillOnce(Return(0));

    EXPECT_CALL(sdbus_mock, sd_bus_emit_object_removed(IsNull(), StrEq("asdf")))
        .WillOnce(Return(0));

    hwmon::FanPwm f(std::move(hwmonio_mock), devPath, id, bus_mock,
                    objPath.c_str(), defer, target);
}

TEST(FanPwmTest, WriteTargetValue)
{
    // Create a FanPwm and write a value to the object.

    sdbusplus::SdBusMock sdbus_mock;
    auto bus_mock = sdbusplus::get_mocked_new(&sdbus_mock);

    std::string instancePath = "";
    std::string devPath = "devp";
    std::string id = "the_id";
    std::string objPath = "asdf";
    bool defer = true;
    uint64_t target = 0x01;

    std::unique_ptr<hwmonio::HwmonIOInterface> hwmonio_mock =
        std::make_unique<hwmonio::HwmonIOMock>();

    SetupDbusObject(&sdbus_mock, objPath, FanPwmIntf, FanPwmProp);

    hwmonio::HwmonIOMock *hwmonio =
        reinterpret_cast<hwmonio::HwmonIOMock *>(hwmonio_mock.get());

    hwmon::FanPwm f(std::move(hwmonio_mock), devPath, id, bus_mock,
                    objPath.c_str(), defer, target);

    target = 0x64;

    EXPECT_CALL(*hwmonio,
                write(static_cast<uint32_t>(target), StrEq("pwm"),
                      StrEq("the_id"), _, hwmonio::retries, hwmonio::delay));

    EXPECT_CALL(sdbus_mock,
                sd_bus_emit_properties_changed_strv(
                    IsNull(), StrEq("asdf"), StrEq(FanPwmIntf), NotNull()))
        .WillOnce(Invoke([&](sd_bus *bus, const char *path,
                             const char *interface, char **names) {
            EXPECT_EQ(0, strncmp("Target", names[0], 6));
            return 0;
        }));

    EXPECT_EQ(target, f.target(target));
}

TEST(FanPwmTest, WriteTargetValueNoUpdate)
{
    // Create a FanPwm and write a value to the object that was the previous
    // value.

    sdbusplus::SdBusMock sdbus_mock;
    auto bus_mock = sdbusplus::get_mocked_new(&sdbus_mock);

    std::string instancePath = "";
    std::string devPath = "devp";
    std::string id = "the_id";
    std::string objPath = "asdf";
    bool defer = true;
    uint64_t target = 0x01;

    std::unique_ptr<hwmonio::HwmonIOInterface> hwmonio_mock =
        std::make_unique<hwmonio::HwmonIOMock>();

    SetupDbusObject(&sdbus_mock, objPath, FanPwmIntf, FanPwmProp);

    hwmon::FanPwm f(std::move(hwmonio_mock), devPath, id, bus_mock,
                    objPath.c_str(), defer, target);

    EXPECT_EQ(target, f.target(target));
}