using SQLInsight.Collectors.Concurrency;
using SQLInsight.Collectors.Databases;
using SQLInsight.Collectors.Instance;
using SQLInsight.Collectors.Performance;

namespace SQLInsight.Collectors;

public static class BuiltInCollectors
{
    /// <param name="custom">Community and local rules whose queries are run by the custom-rules collector.</param>
    /// <param name="settings">The customer's settings for collectors that need them; defaults when null.</param>
    public static IReadOnlyList<ICollector> Create(Core.CustomRules.CustomRuleCatalog? custom = null, CollectorSettings? settings = null)
    {
        settings ??= new CollectorSettings();
        return
        [
            new ServerCollector(),
            new ConfigurationCollector(),
            new TraceFlagCollector(),
            new InstanceConfigurationCollector(),
            new PrivilegeCollector(settings.Groups, settings.MaxSysadminAccounts),
            new DatabaseCollector(),
            new SuspectPageCollector(),
            new PlanCacheCollector(),
            new WaitStatsCollector(),
            new FileIoCollector(),
            new QueryStatsCollector(settings.ActivityThresholdPercent),
            new WaitSamplingCollector(),
            new LongOperationCollector(),
            new ErrorLogCollector(settings.LoginFailureBurst),
            new PerformanceCounterCollector(),
            new CpuCollector(),
            new BlockingCollector(),
            new DeadlockCollector(),
            new QueryStoreCollector(),
            new PlanAnalysisCollector(),
            new IndexCollector(),
            new AvailabilityGroupCollector(),
            new AgentJobCollector(),
            .. custom is null ? Array.Empty<ICollector>() : [new Custom.CustomQueryCollector(custom)],
        ];
    }
}

/// <summary>Settings from the agent's configuration that some collectors need.</summary>
/// <param name="Groups">Unfolds Windows groups with server rights to the people in them (Active Directory).</param>
/// <param name="MaxSysadminAccounts">More people and accounts with sysadmin than this is a finding.</param>
/// <param name="ActivityThresholdPercent">A statement using more CPU time than this share of its lifetime is a finding.</param>
/// <param name="LoginFailureBurst">Failed logins within one collection (5 minutes) before it is a finding.</param>
public sealed record CollectorSettings(
    Core.Data.IGroupMemberResolver? Groups = null,
    int MaxSysadminAccounts = 3,
    double ActivityThresholdPercent = 50,
    int LoginFailureBurst = 20);