// 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;

/// <summary>
/// Word document metadata.
///
/// Extracted from DOCX files using shared Office Open XML metadata extraction.
/// Integrates with `office_metadata` module for core/app/custom properties.
/// </summary>
public sealed record DocxMetadata
{
    /// <summary>
    /// Core properties from docProps/core.xml (Dublin Core metadata)
    ///
    /// Contains title, creator, subject, keywords, dates, etc.
    /// Shared format across DOCX/PPTX/XLSX documents.
    /// </summary>
    [JsonPropertyName("core_properties")]
    public CoreProperties? CoreProperties { get; init; } = null;

    /// <summary>
    /// Application properties from docProps/app.xml (Word-specific statistics)
    ///
    /// Contains word count, page count, paragraph count, editing time, etc.
    /// DOCX-specific variant of Office application properties.
    /// </summary>
    [JsonPropertyName("app_properties")]
    public DocxAppProperties? AppProperties { get; init; } = null;

    /// <summary>
    /// Custom properties from docProps/custom.xml (user-defined properties)
    ///
    /// Contains key-value pairs defined by users or applications.
    /// Values can be strings, numbers, booleans, or dates.
    /// </summary>
    [JsonPropertyName("custom_properties")]
    public Dictionary<string, string>? CustomProperties { get; init; } = null;


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