using SQLInsight.Core.CustomRules;
using SQLInsight.Rules;
using SQLInsight.Rules.Engine;

namespace SQLInsight.Community.Services;

public sealed record RuleEntry(string Id, string Title, string Area, string? Author, bool Community);

/// <summary>Every rule the product ships: the built-in ones and the community rules in the rule pack.</summary>
public static class RuleCatalog
{
    private static readonly Dictionary<string, string> Areas = new(StringComparer.Ordinal)
    {
        ["VER"] = "Version og opdateringer",
        ["CFG"] = "Konfiguration",
        ["DB"] = "Databaser, backup og integritet",
        ["WAIT"] = "Ventetider",
        ["IO"] = "I/O",
        ["CPU"] = "CPU og hukommelse",
        ["MEM"] = "CPU og hukommelse",
        ["ANOM"] = "Afvigelser fra det normale",
        ["QS"] = "Query Store og planer",
        ["PLAN"] = "Query Store og planer",
        ["IDX"] = "Indexes og statistik",
        ["STAT"] = "Indexes og statistik",
        ["AG"] = "Always On og SQL Agent",
        ["JOB"] = "Always On og SQL Agent",
        ["BLK"] = "Blocking og deadlocks",
        ["DLK"] = "Blocking og deadlocks",
        ["SEC"] = "Sikkerhed",
    };

    public static IReadOnlyList<RuleEntry> All(IReadOnlyList<CustomRuleDefinition> community)
    {
        ArgumentNullException.ThrowIfNull(community);
        IEnumerable<RuleEntry> builtIn = BuiltInRules.Create().Select(r => new RuleEntry(r.Id, r.Title, Area(r.Id), null, false));
        return builtIn.Concat(community.Select(r => new RuleEntry(r.Id, r.Title, Area(r.Id), r.Author, true))).ToList();
    }

    public static string Area(string id)
    {
        ArgumentNullException.ThrowIfNull(id);
        var parts = id.Split('-');
        return parts.Length >= 2 && Areas.TryGetValue(parts[1], out var area) ? area : "Andet";
    }
}