namespace FinlyticCore.Dtos.TradeRepublic;

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

// 1. Der Response-Wrapper
public record TradeRepublicAssetResponse(
    [property: JsonPropertyName("correlationId")] string CorrelationId,
    [property: JsonPropertyName("resultCount")] int ResultCount,
    [property: JsonPropertyName("results")] IList<TradeRepublicAsset> Results
);

// 2. Das Tag-Objekt
public record TradeRepublicTag
{
    [JsonPropertyName("id")] public string Id { get; init; } = "";
    [JsonPropertyName("name")] public string Name { get; init; } = "";
    [JsonPropertyName("type")] public string Type { get; init; } = "";
}

// 3. Die Basisklasse MIT UNSEREM CUSTOM CONVERTER
[JsonConverter(typeof(TradeRepublicAssetConverter))]
public record TradeRepublicAsset
{
    [JsonPropertyName("isin")] public string Isin { get; init; } = "";
    [JsonPropertyName("name")] public string Name { get; init; } = "";
    [JsonPropertyName("type")] public string Type { get; init; } = "";
    private readonly string _instrumentCategory = "";
    [JsonPropertyName("instrumentCategory")] 
    public string InstrumentCategory 
    { 
        get => _instrumentCategory; 
        init => _instrumentCategory = value ?? ""; 
    }
    [JsonPropertyName("hasCfd")] public bool HasCfd { get; init; }
    [JsonPropertyName("imageId")] public string? ImageId { get; init; }
    
    [JsonPropertyName("tags")] 
    public IReadOnlyList<TradeRepublicTag> Tags { get; init; } = Array.Empty<TradeRepublicTag>();
}

// 4. Die spezifischen Klassen

public record TradeRepublicStock : TradeRepublicAsset
{
    [JsonPropertyName("derivativeProductCategories")] 
    public IReadOnlyList<string> DerivativeProductCategories { get; init; } = Array.Empty<string>();
}

public record TradeRepublicCrypto : TradeRepublicAsset
{
    [JsonPropertyName("subtitle")] public string Subtitle { get; init; } = "";
    [JsonPropertyName("searchSubtitle")] public string SearchSubtitle { get; init; } = "";
}

public record TradeRepublicEtf : TradeRepublicAsset
{
    [JsonPropertyName("derivativeProductCategories")] 
    public IReadOnlyList<string> DerivativeProductCategories { get; init; } = Array.Empty<string>();
    [JsonPropertyName("etfDescription")] public string EtfDescription { get; init; } = "";
    [JsonPropertyName("mappedEtfIndexName")] public string MappedEtfIndexName { get; init; } = "";
    [JsonPropertyName("subtitle")] public string Subtitle { get; init; } = "";
    [JsonPropertyName("searchSubtitle")] public string SearchSubtitle { get; init; } = "";
}

public record TradeRepublicSynthetic : TradeRepublicAsset
{
    [JsonPropertyName("derivativeProductCategories")] 
    public IReadOnlyList<string> DerivativeProductCategories { get; init; } = Array.Empty<string>();
}

// Anleihen
public record TradeRepublicBond : TradeRepublicAsset
{
    [JsonPropertyName("bondIssuerName")] public string BondIssuerName { get; init; } = "";
    [JsonPropertyName("searchSubtitle")] public string SearchSubtitle { get; init; } = "";
}

// Derivate (Hebeleffekte etc.)
public record TradeRepublicDerivative : TradeRepublicAsset
{
    [JsonPropertyName("derivativeProductCategories")] 
    public IReadOnlyList<string> DerivativeProductCategories { get; init; } = Array.Empty<string>();
    
    [JsonIgnore]
    public string? UnderlyingIsin
    {
        get
        {
            if (!string.IsNullOrEmpty(ImageId) && ImageId.StartsWith("logos/"))
            {
                var parts = ImageId.Split('/');
                if (parts.Length >= 2)
                {
                    return parts[1];
                }
            }
            return null;
        }
    }
}

// 5. Custom Converter
public class TradeRepublicAssetConverter : JsonConverter<TradeRepublicAsset>
{
    public override TradeRepublicAsset Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        using var doc = JsonDocument.ParseValue(ref reader);
        var root = doc.RootElement;

        string? instrumentType = null;
        if (root.TryGetProperty("instrumentType", out var typeElement))
        {
            instrumentType = typeElement.GetString();
        }

        TradeRepublicAsset? result = instrumentType switch
        {
            "stock" => JsonSerializer.Deserialize<TradeRepublicStock>(root.GetRawText(), options),
            "crypto" => JsonSerializer.Deserialize<TradeRepublicCrypto>(root.GetRawText(), options),
            "fund" => JsonSerializer.Deserialize<TradeRepublicEtf>(root.GetRawText(), options),
            "synthetic" => JsonSerializer.Deserialize<TradeRepublicSynthetic>(root.GetRawText(), options),
            "bond" => JsonSerializer.Deserialize<TradeRepublicBond>(root.GetRawText(), options),
            "derivative" => JsonSerializer.Deserialize<TradeRepublicDerivative>(root.GetRawText(), options),
            _ => JsonSerializer.Deserialize<TradeRepublicAssetFallback>(root.GetRawText(), options)
        };

        return result ?? new TradeRepublicAssetFallback();
    }

    public override void Write(Utf8JsonWriter writer, TradeRepublicAsset value, JsonSerializerOptions options)
    {
        JsonSerializer.Serialize(writer, value, value.GetType(), options);
    }
}

public record TradeRepublicAssetFallback : TradeRepublicAsset;