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using System;
using System.Collections.Generic;
using XenAdmin.Core;
using XenAdmin.Diagnostics.Hotfixing;
using XenAdmin.Diagnostics.Problems;
using XenAdmin.Diagnostics.Problems.HostProblem;
using XenAPI;


namespace XenAdmin.Diagnostics.Checks
{
    class PowerOniLoCheck : HostPostLivenessCheck
    {
        private readonly Dictionary<string, string> _installMethodConfig;
        private XenServerVersion _newVersion;
        private readonly bool _manualUpgrade;

        public PowerOniLoCheck(Host host, XenServerVersion newVersion)
            : base(host)
        {
            _newVersion = newVersion;
        }

        public PowerOniLoCheck(Host host, Dictionary<string, string> installMethodConfig, bool manualUpgrade)
            : base(host)
        {
            _installMethodConfig = installMethodConfig;
            _manualUpgrade = manualUpgrade;
        }

        public override string Description => Messages.CHECKING_POWER_ON_MODE;

        public override bool CanRun()
        {
            if (Helpers.StockholmOrGreater(Host))
                return false;

            if (Host == null || string.IsNullOrEmpty(Host.power_on_mode))
                //check for disabled as this is when the check would raise an eyebrow
                return false;

            if (_newVersion != null && !Helpers.NaplesOrGreater(Host))
                return false;

            return true;
        }

        protected override Problem RunHostCheck()
        {
            //update case
            if (_newVersion != null)
            {
                if (_newVersion.Version.CompareTo(new Version(BrandManager.ProductVersion82Short)) >= 0)
                    return new PowerOniLoProblem(this, Host);
                return null;
            }

            //upgrade case

            if (!_manualUpgrade)
            {
                var hotfix = HotfixFactory.Hotfix(Host);
                if (hotfix != null && hotfix.ShouldBeAppliedTo(Host))
                    return new HostDoesNotHaveHotfixWarning(this, Host);
            }

            string upgradePlatformVersion = null;

            if (_installMethodConfig != null)
                Host.TryGetUpgradeVersion(Host, _installMethodConfig, out upgradePlatformVersion, out _);

            // we don't know the upgrade version, so add generic warning
            // (this is the case of the manual upgrade or when the rpu plugin doesn't have the function)
            if (string.IsNullOrEmpty(upgradePlatformVersion))
                return new PowerOniLoWarning(this, Host);
                
            // we know they are upgrading to Stockholm or greater, so block them
            if (Helpers.StockholmOrGreater(upgradePlatformVersion))
                return new PowerOniLoProblem(this, Host);

            return null;
        }
    }
}