// This file is auto-generated by alef — DO NOT EDIT.
// alef:hash:4e15143f4af1ae8bafbdb1506ef057da924484c66a19483966333558ad437e75
// To regenerate: alef generate
// To verify freshness: alef verify --exit-code
// Issues & docs: https://github.com/kreuzberg-dev/alef
#nullable enable

using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace Kreuzberg;

public sealed record TokenReductionConfig
{
    [JsonPropertyName("level")]
    public ReductionLevel Level { get; init; } = ReductionLevel.Moderate;

    [JsonPropertyName("language_hint")]
    public string? LanguageHint { get; init; } = null;

    [JsonPropertyName("preserve_markdown")]
    public bool PreserveMarkdown { get; init; } = false;

    [JsonPropertyName("preserve_code")]
    public bool PreserveCode { get; init; } = true;

    [JsonPropertyName("semantic_threshold")]
    public float SemanticThreshold { get; init; } = 0.3f;

    [JsonPropertyName("enable_parallel")]
    public bool EnableParallel { get; init; } = true;

    [JsonPropertyName("use_simd")]
    public bool UseSimd { get; init; } = true;

    [JsonPropertyName("custom_stopwords")]
    public Dictionary<string, List<string>>? CustomStopwords { get; init; } = null;

    [JsonPropertyName("preserve_patterns")]
    public List<string> PreservePatterns { get; init; } = [];

    [JsonPropertyName("target_reduction")]
    public float? TargetReduction { get; init; } = null;

    [JsonPropertyName("enable_semantic_clustering")]
    public bool EnableSemanticClustering { get; init; } = false;


    /// <summary>
    /// Parse a <see cref="TokenReductionConfig"/> from a JSON string.
    /// </summary>
    /// <exception cref="KreuzbergException">When the JSON cannot be deserialised.</exception>
    public static TokenReductionConfig FromJson(string json)
    {
        try
        {
            return JsonSerializer.Deserialize<TokenReductionConfig>(json, JsonOptions)
                ?? throw new KreuzbergException($"Failed to parse TokenReductionConfig from JSON: deserializer returned null");
        }
        catch (KreuzbergException)
        {
            throw;
        }
        catch (Exception e)
        {
            throw new KreuzbergException($"Failed to parse TokenReductionConfig from JSON: {e.Message}", e);
        }
    }

    private static readonly JsonSerializerOptions JsonOptions = new()
    {
        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingDefault,
        Converters = { new JsonStringEnumConverter(JsonNamingPolicy.SnakeCaseLower) },
    };

    /// <summary>Options for serializing config/input objects to FFI. Strips nulls
    /// (nullable C# fields default to null and would override required Rust fields with
    /// non-deserialisable nulls) but preserves explicit false/0 so caller intent is kept.</summary>
    private static readonly JsonSerializerOptions JsonSerializationOptions = new()
    {
        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
        Converters = { new JsonStringEnumConverter(JsonNamingPolicy.SnakeCaseLower) },
    };

    public static TokenReductionConfig Default()
    {
        var nativeResult = NativeMethods.TokenReductionConfigDefault();
        var jsonPtr = NativeMethods.TokenReductionConfigToJson(nativeResult);
        var json = global::System.Runtime.InteropServices.Marshal.PtrToStringUTF8(jsonPtr);
        NativeMethods.FreeString(jsonPtr);
        NativeMethods.TokenReductionConfigFree(nativeResult);
        return JsonSerializer.Deserialize<TokenReductionConfig>(json ?? "null", JsonOptions)!;
    }
}
