// 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>
/// Email extraction result.
///
/// Complete representation of an extracted email message (.eml or .msg)
/// including headers, body content, and attachments.
/// </summary>
public sealed record EmailExtractionResult
{
    /// <summary>
    /// Email subject line
    /// </summary>
    [JsonPropertyName("subject")]
    public string? Subject { get; init; } = null;

    /// <summary>
    /// Sender email address
    /// </summary>
    [JsonPropertyName("from_email")]
    public string? FromEmail { get; init; } = null;

    /// <summary>
    /// Primary recipient email addresses
    /// </summary>
    [JsonPropertyName("to_emails")]
    public List<string> ToEmails { get; init; } = [];

    /// <summary>
    /// CC recipient email addresses
    /// </summary>
    [JsonPropertyName("cc_emails")]
    public List<string> CcEmails { get; init; } = [];

    /// <summary>
    /// BCC recipient email addresses
    /// </summary>
    [JsonPropertyName("bcc_emails")]
    public List<string> BccEmails { get; init; } = [];

    /// <summary>
    /// Email date/timestamp
    /// </summary>
    [JsonPropertyName("date")]
    public string? Date { get; init; } = null;

    /// <summary>
    /// Message-ID header value
    /// </summary>
    [JsonPropertyName("message_id")]
    public string? MessageId { get; init; } = null;

    /// <summary>
    /// Plain text version of the email body
    /// </summary>
    [JsonPropertyName("plain_text")]
    public string? PlainText { get; init; } = null;

    /// <summary>
    /// HTML version of the email body
    /// </summary>
    [JsonPropertyName("html_content")]
    public string? HtmlContent { get; init; } = null;

    /// <summary>
    /// Cleaned/processed text content. Aliased as `cleaned_text` for back-compat.
    /// </summary>
    [JsonPropertyName("content")]
    public required string Content { get; init; }

    /// <summary>
    /// List of email attachments
    /// </summary>
    [JsonPropertyName("attachments")]
    public List<EmailAttachment> Attachments { get; init; } = [];

    /// <summary>
    /// Additional email headers and metadata
    /// </summary>
    [JsonPropertyName("metadata")]
    public Dictionary<string, string> Metadata { get; init; } = default!;


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