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using System;
using System.Collections.Generic;
using System.Reflection;
using NUnit.Framework;
using XenAdmin.Wlb;
using XenAdminTests.UnitTests.UnitTestHelper;

namespace XenAdminTests.UnitTests.WlbTests
{
    [TestFixture, Category(TestCategories.Unit)]
    public class WlbPoolConfigurationTests
    {
        private IUnitTestVerifier validator;
        private WlbPoolConfiguration wlbPool;
        private const int NUMBER_OF_PROPERTIES = 34;

        [Test, ExpectedException(typeof(Exception))]
        public void NullCtorThrows()
        {
           wlbPool = new WlbPoolConfiguration(null); 
        }

        [Test]
        public void ConstructedWithEmptyDictionaryVerifyGettersReturnValues()
        {
            wlbPool = new WlbPoolConfiguration(new Dictionary<string, string>());
            PropertyInfo[] pi = wlbPool.GetType().GetProperties();

            Assert.AreEqual(NUMBER_OF_PROPERTIES, pi.Length, "Number of properties");

            List<string> fieldsToSkip = new List<string>()
                                          {
                                             "AutoBalanceAggressiveness", //Enum
                                             "AutoBalanceSeverity",       //Enum
                                             "ReportingSMTPServer"        //Not set
                                          };

            foreach (PropertyInfo propertyInfo in pi)
            {
                if( !fieldsToSkip.Contains( propertyInfo.Name ))
                {
                    string extractedValue = propertyInfo.GetValue(wlbPool, null).ToString();
                    Assert.IsFalse(String.IsNullOrEmpty(extractedValue), "PB:" + propertyInfo.Name);
                }
            }

            Assert.IsNullOrEmpty(wlbPool.ReportingSMTPServer);

        }

        [Test]
        public void SettersThatSetOnlyForMROrLaterForVersionNewerThanMR()
        {

            Dictionary<string, string> inputData =  new Dictionary<string, string>()
                                                        {
                                                            {"WlbVersion", "6.0"},
                                                            {"AutoBalanceEnabled", "false"},
                                                            {"AutoBalancePollIntervals", "0.333333"},
                                                            {"AutoBalanceSeverity", "High"},
                                                            {"AutoBalanceAggressiveness", "High"},
                                                            {"PowerManagementEnabled", "false"},
                                                            {"PowerManagementPollIntervals", "5.321264"},
                                                            {"EnableOptimizationModeSchedules", "false"} //Equal to AutomateOptimizationMode
                                                        };

            validator = new VerifyGettersAndSetters(new WlbPoolConfiguration(inputData));

            MRSensitiveData expectedData = new MRSensitiveData()
                                            {
                                                AutoBalanceEnabled = true,
                                                AutoBalancePollIntervals = 2.0,
                                                AutoBalanceSeverity = WlbPoolAutoBalanceSeverity.Low,
                                                AutoBalanceAggressiveness = WlbPoolAutoBalanceAggressiveness.Medium,
                                                PowerManagementEnabled = true,
                                                PowerManagementPollIntervals = 7.0,
                                                AutomateOptimizationMode = true
                                            };

            validator.Verify( expectedData);

        }

        [Test]
        public void SettersThatSetOnlyForMROrLaterForVersionOlderThanMR()
        {

            Dictionary<string, string> inputData = new Dictionary<string, string>()
                                                        {
                                                            {"WlbVersion", "1.0"},
                                                            {"AutoBalanceEnabled", "false"},
                                                            {"AutoBalancePollIntervals", "1.0"},
                                                            {"AutoBalanceSeverity", "High"},
                                                            {"AutoBalanceAggressiveness", "High"},
                                                            {"PowerManagementEnabled", "false"},
                                                            {"PowerManagementPollIntervals", "5.0"},
                                                            {"EnableOptimizationModeSchedules", "false"} //Equal to AutomateOptimizationMode
                                                        };
            VerifyGettersAndSetters validatorGetSet = new VerifyGettersAndSetters(new WlbPoolConfiguration(inputData));

            MRSensitiveData expectedData = new MRSensitiveData()
            {
                AutoBalanceEnabled = false,
                AutoBalancePollIntervals = 1.0,
                AutoBalanceSeverity = WlbPoolAutoBalanceSeverity.High,
                AutoBalanceAggressiveness = WlbPoolAutoBalanceAggressiveness.High,
                PowerManagementEnabled = false,
                PowerManagementPollIntervals = 5.0,
                AutomateOptimizationMode = false
            };

            MRSensitiveData dataToSet = new MRSensitiveData()
            {
                AutoBalanceEnabled = true,
                AutoBalancePollIntervals = 2.0,
                AutoBalanceSeverity = WlbPoolAutoBalanceSeverity.Low,
                AutoBalanceAggressiveness = WlbPoolAutoBalanceAggressiveness.Medium,
                PowerManagementEnabled = true,
                PowerManagementPollIntervals = 7.0,
                AutomateOptimizationMode = true
            };

            validatorGetSet.VerifySettersAndGetters(expectedData, dataToSet);
        }

        [Test]
        public void SettersThatSetVerbatim()
        {
            Dictionary<string, string> inputData = new Dictionary<string, string>()
                                                       {
                                                           //Simple setters.....
                                                           {"OptimizationMode", "MaximizeDensity"}, //PerformanceMode
                                                           {"MetricGroomingPeriod", "2.0"},
                                                           {"RecentMoveMinutes", "2.0"},
                                                           //{"ReportingUseRSServer", "false"},
                                                           {"ReportingSMTPServer", "some string"},
                                                           //These set ranges of values.....
                                                           {"HostCpuThresholdCritical", "3"},
                                                           {"HostMemoryThresholdCritical", "3.0"},
                                                           {"HostPifReadThresholdCritical", "4.0"}, //HostNetworkReadThresholdCritical
                                                           {"HostPifWriteThresholdCritical", "5.0"}, //HostNetworkWriteThresholdCritical
                                                           {"HostPbdReadThresholdCritical", "6.0"}, //HostDiskReadThresholdCritical
                                                           {"HostPbdWriteThresholdCritical", "7.0"}, //HostDiskWriteThresholdCritical
                                                           {"VmCpuUtilizationWeightHigh", "8"},
                                                           {"VmMemoryWeightHigh", "9"},
                                                           {"VmDiskReadWeightHigh", "10"},
                                                           {"VmDiskWriteWeightHigh", "11"},
                                                           {"VmNetworkReadWeightHigh", "12"},
                                                           {"VmNetworkWriteWeightHigh", "13"}
                                                        };

            validator = new VerifyGettersAndSetters(new WlbPoolConfiguration(inputData));
            MRInSensitiveData data = new MRInSensitiveData()
                                         {
                                             PerformanceMode = WlbPoolPerformanceMode.MaximizePerformance,
                                             MetricGroomingPeriod = 5.0,
                                             RecentMoveMinutes = 6.0,
                                             //ReportingUseRSServer = true,
                                             ReportingSMTPServer = "who knows what?!",
                                             HostCpuThresholdCritical = 1,
                                             HostMemoryThresholdCritical = 2,
                                             HostNetworkReadThresholdCritical = 1.0,
                                             HostNetworkWriteThresholdCritical = 2.0,
                                             HostDiskReadThresholdCritical = 3.0,
                                             HostDiskWriteThresholdCritical = 4.0,
                                             VmCpuUtilizationWeightHigh = 5,
                                             VmMemoryWeightHigh = 6,
                                             VmDiskReadWeightHigh = 7,
                                             VmDiskWriteWeightHigh = 8,
                                             VmNetworkReadWeightHigh = 9,
                                             VmNetworkWriteWeightHigh = 10
                                         };

            validator.Verify(data);
        }

        [Test]
        public void OvercommitCPUsGetTheCorrectValueForDifferentModes()
        {
            Dictionary<string, string> inputData = new Dictionary<string, string>()
                                                       {
                                                           {"OverCommitCpuInDensityMode", "false"},
                                                           {"OverCommitCpuInPerfMode", "true"}
                                                       };

            wlbPool = new WlbPoolConfiguration(inputData);

            //Setter drops through if the key has not been added to the dictionary so won't set the values
            wlbPool.PerformanceMode = WlbPoolPerformanceMode.MaximizeDensity;
            //This should be false if the key were there
            Assert.IsTrue(wlbPool.OvercommitCPUs, "OvercommitCPUs in MaximizeDensity mode without key");

            //Add the key and set the data - this is now the default behaviour
            wlbPool.AddParameter("OptimizationMode", "MaximizeDensity");
            wlbPool.PerformanceMode = WlbPoolPerformanceMode.MaximizeDensity;
            Assert.IsFalse(wlbPool.OvercommitCPUs, "OvercommitCPUs in MaximizeDensity mode");

            wlbPool.PerformanceMode = WlbPoolPerformanceMode.MaximizePerformance;
            Assert.IsTrue(wlbPool.OvercommitCPUs, "OvercommitCPUs in MaximizePerformance");
        }

        #region Helper functions

        private struct MRSensitiveData
        {
            public bool AutoBalanceEnabled;
            public double AutoBalancePollIntervals;
            public WlbPoolAutoBalanceSeverity AutoBalanceSeverity;
            public WlbPoolAutoBalanceAggressiveness AutoBalanceAggressiveness;
            public bool PowerManagementEnabled;
            public double PowerManagementPollIntervals;
            public bool AutomateOptimizationMode;
        }

        private struct MRInSensitiveData
        {
            public WlbPoolPerformanceMode PerformanceMode;
            public double MetricGroomingPeriod;
            public double RecentMoveMinutes;
            //public bool ReportingUseRSServer;
            public string ReportingSMTPServer;
            public int HostCpuThresholdCritical;
            public double HostMemoryThresholdCritical;
            public double HostNetworkReadThresholdCritical;
            public double HostNetworkWriteThresholdCritical;
            public double HostDiskReadThresholdCritical;
            public double HostDiskWriteThresholdCritical;
            public int VmCpuUtilizationWeightHigh;
            public int VmMemoryWeightHigh;
            public int VmDiskReadWeightHigh;
            public int VmDiskWriteWeightHigh;
            public int VmNetworkReadWeightHigh;
            public int VmNetworkWriteWeightHigh;
        }

        #endregion
    }
}