namespace Sozsoft.Mcp;

/// <summary>
/// Kayitli nesneleri listelemek icin kullanilan katalog sorgulari. Parametre almazlar;
/// sabit metin oldugu icin string birlestirme riski yoktur.
/// </summary>
internal static class McpCatalogQueries
{
    public const string SqlServer = """
        SELECT
            SCHEMA_NAME(o.schema_id) AS SchemaName,
            o.name                   AS ObjectName,
            CASE o.type
                WHEN 'V'  THEN 'VIEW'
                WHEN 'P'  THEN 'PROCEDURE'
                WHEN 'IF' THEN 'TABLE_FUNCTION'
                WHEN 'TF' THEN 'TABLE_FUNCTION'
                WHEN 'FN' THEN 'SCALAR_FUNCTION'
            END                      AS ObjectKind
        FROM sys.objects o
        WHERE o.is_ms_shipped = 0
          AND o.type IN ('V', 'P', 'IF', 'TF', 'FN')
        ORDER BY SchemaName, ObjectName
        """;

    public const string Postgres = """
        SELECT n.nspname AS "SchemaName",
               c.relname AS "ObjectName",
               'VIEW'    AS "ObjectKind"
        FROM pg_class c
        JOIN pg_namespace n ON n.oid = c.relnamespace
        WHERE c.relkind IN ('v', 'm')
          AND n.nspname NOT IN ('pg_catalog', 'information_schema')
        UNION ALL
        SELECT n.nspname AS "SchemaName",
               p.proname AS "ObjectName",
               CASE
                   WHEN p.prokind = 'p' THEN 'PROCEDURE'
                   WHEN p.proretset      THEN 'TABLE_FUNCTION'
                   ELSE 'SCALAR_FUNCTION'
               END       AS "ObjectKind"
        FROM pg_proc p
        JOIN pg_namespace n ON n.oid = p.pronamespace
        WHERE n.nspname NOT IN ('pg_catalog', 'information_schema')
        ORDER BY 1, 2
        """;
}