using System.Collections.Generic;
using System.Linq;
using Sozsoft.Platform;

namespace Sozsoft.Mcp;

/// <summary>
/// /mcp ucunda yayinlanan arac adlari. Ayni degerler MCP Servers ekranindaki
/// <c>AllowedTools</c> alaninin secenek listesini besler; buraya bir arac eklenirse ekranin
/// statik lookup listesi de guncellenir.
/// </summary>
public static class McpToolNames
{
    public const string ServerInfo = "server_info";
    public const string ListLists = "list_lists";
    public const string DescribeList = "describe_list";
    public const string SearchSchema = "search_schema";
    public const string QueryList = "query_list";
    public const string RunSelect = "run_select";
    public const string ListQueries = "list_queries";
    public const string RunQuery = "run_query";
    public const string InsertRow = "insert_row";
    public const string UpdateRow = "update_row";
    public const string DeleteRow = "delete_row";
    public const string GetDevGuide = "get_dev_guide";
    public const string CreateTable = "create_table";
    public const string ListWizards = "list_wizards";
    public const string GetWizard = "get_wizard";
    public const string DeployWizard = "deploy_wizard";
    public const string DeleteWizard = "delete_wizard";
    public const string VerifyWizard = "verify_wizard";
    public const string StartDevRequest = "start_dev_request";
    public const string GetDevRequest = "get_dev_request";
    public const string AppendDevRequestNote = "append_dev_request_note";
    public const string AddDevRequestSubTasks = "add_dev_request_subtasks";
    public const string ListComponents = "list_components";
    public const string GetComponent = "get_component";
    public const string SaveComponent = "save_component";
    public const string DeleteComponent = "delete_component";

    /// <summary>
    /// Ekran ve bilesen gelistirme araclari; kiraci baglaminda hicbiri acilmaz. Okuyanlar
    /// <c>McpServers.Invoke</c> ile, degistirenler <c>McpServers.Write</c> ile acilir
    /// (<see cref="RequiredPermissions"/>).
    /// </summary>
    public static readonly string[] DevelopTools =
    [
        GetDevGuide,
        CreateTable,
        ListWizards,
        GetWizard,
        DeployWizard,
        DeleteWizard,
        VerifyWizard,
        StartDevRequest,
        GetDevRequest,
        AppendDevRequestNote,
        AddDevRequestSubTasks,
        ListComponents,
        GetComponent,
        SaveComponent,
        DeleteComponent
    ];

    /// <summary>
    /// Sunucu kaydi olmasa da acik kalan araclar. Istemcinin baglantisinin neden bos
    /// gorundugunu anlayabilmesi icin gereklidir.
    /// </summary>
    public static readonly string[] AlwaysAvailableTools = [ServerInfo];

    /// <summary>
    /// Kiraci kullanicisinin gorebildigi araclarin tamami: veri okuma ve ekranin
    /// insert/update/delete sozlesmesinden gecen satir yazma. Yazilim gelistirme araclari
    /// (<see cref="DevelopTools"/>) kiraciya acilmaz. <c>AllowedTools</c> bu kumeyi yalnizca
    /// daraltabilir, genisletemez. <see cref="RunQuery"/> ve <see cref="ListQueries"/> disarida
    /// kalir: procedure ve Custom Endpoint ekran yetkisinden gecmeden veri yazabilir.
    /// <see cref="RunSelect"/> ise tek SELECT disindaki her ifadeyi reddettigi icin okumadir.
    /// </summary>
    public static readonly string[] TenantTools =
    [
        ServerInfo,
        ListLists,
        DescribeList,
        SearchSchema,
        QueryList,
        RunSelect,
        InsertRow,
        UpdateRow,
        DeleteRow
    ];

    /// <summary>
    /// <c>McpServers.Invoke</c> (/mcp ucunun kendisinde aranir) disinda istenen yetki. Iki
    /// turdur: MCP uzerinden her degisiklik <c>McpServers.Write</c> ister; ham SQL liste
    /// yetkilerini astigi icin uygulamadaki SQL Query Manager yetkisini ister. Listede olmayan
    /// araclar okumadir ve arkadaki servisin kendi yetkisiyle suzulur. MCP yetki vermez:
    /// Wizard, Custom Components ve ekran C/U/D yetkileri ayrica aranir.
    /// </summary>
    public static readonly IReadOnlyDictionary<string, string> RequiredPermissions = new Dictionary<string, string>
    {
        [RunSelect] = PlatformConsts.AppCodes.SqlQueryManagers.Default,
        [InsertRow] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [UpdateRow] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [DeleteRow] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [CreateTable] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [DeployWizard] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [DeleteWizard] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [StartDevRequest] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [AppendDevRequestNote] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [AddDevRequestSubTasks] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [SaveComponent] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
        [DeleteComponent] = PlatformConsts.AppCodes.DeveloperKits.McpServers.Write,
    };

    /// <summary>
    /// Arkadaki servisin <c>[Authorize]</c> attribute'u ile istedigi yetkiler. Attribute ile
    /// reddedilen cagri eksik yetkinin adini tasimaz; kullaniciya hangi yetkinin eksik oldugunu
    /// soyleyebilmek icin burada tutulur. Kodda adiyla istenen yetkiler (ekran C/R/U/D,
    /// <c>Wizards.Create/Update</c>, Custom Components, <c>App.DevRequests.Update</c>) reddi zaten
    /// adiyla bildirdigi icin buraya yazilmaz.
    /// </summary>
    public static readonly IReadOnlyDictionary<string, string[]> ServicePermissions = new Dictionary<string, string[]>
    {
        [ListWizards] = [PlatformConsts.AppCodes.Listforms.Wizard],
        [GetWizard] = [PlatformConsts.AppCodes.Listforms.Wizard],
        [VerifyWizard] = [PlatformConsts.AppCodes.Listforms.Wizard],
        [DeployWizard] = [PlatformConsts.AppCodes.Listforms.Wizard],
        [DeleteWizard] = [PlatformConsts.AppCodes.Listforms.Wizard, PlatformConsts.AppCodes.Listforms.Wizards.Delete, PlatformConsts.AppCodes.SqlQueryManagers.Default],
    };

    /// <summary>
    /// Bir aracin cagrisinda aranabilecek, adi bilinen yetkiler: uc kapisi (Invoke), MCP kapisi
    /// (<see cref="RequiredPermissions"/>) ve arkadaki servis (<see cref="ServicePermissions"/>).
    /// </summary>
    public static IEnumerable<string> KnownPermissionsOf(string? toolName)
    {
        yield return PlatformConsts.AppCodes.DeveloperKits.McpServers.Invoke;

        if (toolName is null)
        {
            yield break;
        }

        if (RequiredPermissions.TryGetValue(toolName, out var required))
        {
            yield return required;
        }

        if (ServicePermissions.TryGetValue(toolName, out var service))
        {
            foreach (var permission in service)
            {
                yield return permission;
            }
        }
    }

    /// <summary>Yayinlanan tum araclar, arac listesindeki siralarina gore.</summary>
    public static readonly string[] All =
    [
        ServerInfo,
        ListLists,
        DescribeList,
        SearchSchema,
        QueryList,
        RunSelect,
        ListQueries,
        RunQuery,
        InsertRow,
        UpdateRow,
        DeleteRow,
        .. DevelopTools
    ];

    /// <summary>
    /// <c>AllowedTools</c> alaninda secilebilen araclar. Her zaman acik olanlar secenek
    /// olarak sunulmaz; onlari kapatmak mumkun degildir.
    /// </summary>
    public static IEnumerable<string> SelectableTools
        => All.Where(name => !AlwaysAvailableTools.Contains(name));
}