/**
 * Copyright © 2019 IBM Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "device.hpp"
#include "i2c_interface.hpp"
#include "id_map.hpp"
#include "mocked_i2c_interface.hpp"
#include "rail.hpp"
#include "rule.hpp"

#include <exception>
#include <memory>
#include <stdexcept>
#include <string>
#include <utility>
#include <vector>

#include <gtest/gtest.h>

using namespace phosphor::power::regulators;

TEST(IDMapTests, AddDevice)
{
    IDMap idMap{};

    // Create device
    std::unique_ptr<i2c::I2CInterface> i2cInterface =
        i2c::create(1, 0x70, i2c::I2CInterface::InitialState::CLOSED);
    std::string id{"vio_reg"};
    Device device{id, true, "/system/chassis/motherboard/vio_reg",
                  std::move(i2cInterface)};

    // Verify device is not initially in map
    EXPECT_THROW(idMap.getDevice(id), std::invalid_argument);

    // Add device to map
    idMap.addDevice(device);

    // Verify device is now in map
    try
    {
        Device& deviceFound = idMap.getDevice(id);
        EXPECT_EQ(deviceFound.getID(), id);
        EXPECT_EQ(&deviceFound, &device);
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }

    // Verify different device is not in map
    EXPECT_THROW(idMap.getDevice("vio_reg2"), std::invalid_argument);

    // Test where device ID already exists in map
    try
    {
        i2cInterface =
            i2c::create(1, 0x72, i2c::I2CInterface::InitialState::CLOSED);
        Device device2{"vio_reg", true, "/system/chassis/motherboard/vio_reg2",
                       std::move(i2cInterface)};
        idMap.addDevice(device2);
        ADD_FAILURE() << "Should not have reached this line.";
    }
    catch (const std::invalid_argument& error)
    {
        EXPECT_STREQ(error.what(),
                     "Unable to add device: Duplicate ID \"vio_reg\"");
    }
}

TEST(IDMapTests, AddRail)
{
    IDMap idMap{};

    // Create rail
    std::string id{"vio0"};
    Rail rail{id};

    // Verify rail is not initially in map
    EXPECT_THROW(idMap.getRail(id), std::invalid_argument);

    // Add rail to map
    idMap.addRail(rail);

    // Verify rail is now in map
    try
    {
        Rail& railFound = idMap.getRail(id);
        EXPECT_EQ(railFound.getID(), id);
        EXPECT_EQ(&railFound, &rail);
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }

    // Verify different rail is not in map
    EXPECT_THROW(idMap.getRail("vcs0"), std::invalid_argument);

    // Test where rail ID already exists in map
    try
    {
        Rail rail2{"vio0"};
        idMap.addRail(rail2);
        ADD_FAILURE() << "Should not have reached this line.";
    }
    catch (const std::invalid_argument& error)
    {
        EXPECT_STREQ(error.what(), "Unable to add rail: Duplicate ID \"vio0\"");
    }
}

TEST(IDMapTests, AddRule)
{
    IDMap idMap{};

    // Create rule
    std::string id{"set_voltage_rule"};
    Rule rule{id, std::vector<std::unique_ptr<Action>>{}};

    // Verify rule is not initially in map
    EXPECT_THROW(idMap.getRule(id), std::invalid_argument);

    // Add rule to map
    idMap.addRule(rule);

    // Verify rule is now in map
    try
    {
        Rule& ruleFound = idMap.getRule(id);
        EXPECT_EQ(ruleFound.getID(), id);
        EXPECT_EQ(&ruleFound, &rule);
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }

    // Verify different rule is not in map
    EXPECT_THROW(idMap.getRule("set_voltage_rule_page0"),
                 std::invalid_argument);

    // Test where rule ID already exists in map
    try
    {
        Rule rule2{"set_voltage_rule", std::vector<std::unique_ptr<Action>>{}};
        idMap.addRule(rule2);
        ADD_FAILURE() << "Should not have reached this line.";
    }
    catch (const std::invalid_argument& error)
    {
        EXPECT_STREQ(error.what(),
                     "Unable to add rule: Duplicate ID \"set_voltage_rule\"");
    }
}

TEST(IDMapTests, GetDevice)
{
    IDMap idMap{};

    // Create device
    std::unique_ptr<i2c::I2CInterface> i2cInterface =
        i2c::create(1, 0x70, i2c::I2CInterface::InitialState::CLOSED);
    std::string id{"vio_reg"};
    Device device{id, true, "/system/chassis/motherboard/vio_reg",
                  std::move(i2cInterface)};

    // Add a device to the map
    idMap.addDevice(device);

    // Test where ID found in map
    try
    {
        Device& deviceFound = idMap.getDevice(id);
        EXPECT_EQ(deviceFound.getID(), id);
        EXPECT_EQ(&deviceFound, &device);
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }

    // Test where ID not found in map
    try
    {
        idMap.getDevice("vcs_reg");
        ADD_FAILURE() << "Should not have reached this line.";
    }
    catch (const std::invalid_argument& ia_error)
    {
        EXPECT_STREQ(ia_error.what(),
                     "Unable to find device with ID \"vcs_reg\"");
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }
}

TEST(IDMapTests, GetRail)
{
    IDMap idMap{};

    // Add a rail to the map
    std::string id{"vio0"};
    Rail rail{id};
    idMap.addRail(rail);

    // Test where ID found in map
    try
    {
        Rail& railFound = idMap.getRail(id);
        EXPECT_EQ(railFound.getID(), id);
        EXPECT_EQ(&railFound, &rail);
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }

    // Test where ID not found in map
    try
    {
        idMap.getRail("vcs0");
        ADD_FAILURE() << "Should not have reached this line.";
    }
    catch (const std::invalid_argument& ia_error)
    {
        EXPECT_STREQ(ia_error.what(), "Unable to find rail with ID \"vcs0\"");
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }
}

TEST(IDMapTests, GetRule)
{
    IDMap idMap{};

    // Add a rule to the map
    std::string id{"set_voltage_rule"};
    Rule rule{id, std::vector<std::unique_ptr<Action>>{}};
    idMap.addRule(rule);

    // Test where ID found in map
    try
    {
        Rule& ruleFound = idMap.getRule(id);
        EXPECT_EQ(ruleFound.getID(), id);
        EXPECT_EQ(&ruleFound, &rule);
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }

    // Test where ID not found in map
    try
    {
        idMap.getRule("read_sensors_rule");
        ADD_FAILURE() << "Should not have reached this line.";
    }
    catch (const std::invalid_argument& ia_error)
    {
        EXPECT_STREQ(ia_error.what(),
                     "Unable to find rule with ID \"read_sensors_rule\"");
    }
    catch (const std::exception& error)
    {
        ADD_FAILURE() << "Should not have caught exception.";
    }
}