using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Net.Http.Headers;
using System.Reflection;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using ArcaneLibs.Extensions;
using Microsoft.AspNetCore.Components.WebAssembly.Http;

namespace SystemdCtl.Client.Abstractions;

public class StreamingHttpClient : HttpClient
{
    public Dictionary<string, string> AdditionalQueryParameters { get; set; } = new();
    internal string? AssertedUserId { get; set; }

    private JsonSerializerOptions GetJsonSerializerOptions(JsonSerializerOptions? options = null)
    {
        options ??= new JsonSerializerOptions();
        options.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
        return options;
    }

    public async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        if (request.RequestUri is null) throw new NullReferenceException("RequestUri is null");
        if (!request.RequestUri.IsAbsoluteUri) request.RequestUri = new Uri(BaseAddress, request.RequestUri);
        // if (AssertedUserId is not null) request.RequestUri = request.RequestUri.AddQuery("user_id", AssertedUserId);
        foreach (var (key, value) in AdditionalQueryParameters)
        {
            request.RequestUri = request.RequestUri.AddQuery(key, value);
        }

        Console.WriteLine($"Sending request to {request.RequestUri}");

        try
        {
            var webAssemblyEnableStreamingResponseKey =
                new HttpRequestOptionsKey<bool>("WebAssemblyEnableStreamingResponse");
            request.Options.Set(webAssemblyEnableStreamingResponseKey, true);
        }
        catch (Exception e)
        {
            Console.WriteLine("Failed to set browser response streaming:");
            Console.WriteLine(e);
        }
        
        HttpResponseMessage responseMessage;
        // try {
        responseMessage = await base.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
        // }
        // catch (Exception e) {
        // if (requestSettings is { Retries: 0 }) throw;
        // typeof(HttpRequestMessage).GetField("_sendStatus", BindingFlags.NonPublic | BindingFlags.Instance)
        // ?.SetValue(request, 0);
        // await Task.Delay(requestSettings?.RetryDelay ?? 2500, cancellationToken);
        // if(requestSettings is not null) requestSettings.Retries--;
        // return await SendAsync(request, cancellationToken);
        // throw;
        // }

        if (responseMessage.IsSuccessStatusCode) return responseMessage;

        //error handling
        // var content = await responseMessage.Content.ReadAsStringAsync(cancellationToken);
        // typeof(HttpRequestMessage).GetField("_sendStatus", BindingFlags.NonPublic | BindingFlags.Instance)
        // ?.SetValue(request, 0);
        // return await SendAsync(request, cancellationToken);
        return responseMessage;
    }

    // GetAsync
    public Task<HttpResponseMessage> GetAsync([StringSyntax("Uri")] string? requestUri, CancellationToken? cancellationToken = null)
    {
        return SendAsync(new HttpRequestMessage(HttpMethod.Get, requestUri), cancellationToken ?? CancellationToken.None);
    }

    // GetFromJsonAsync
    public async Task<T> GetFromJsonAsync<T>(string requestUri, JsonSerializerOptions? options = null, CancellationToken cancellationToken = default)
    {
        options = GetJsonSerializerOptions(options);
        // Console.WriteLine($"GetFromJsonAsync called for {requestUri} with json options {options?.ToJson(ignoreNull:true)} and cancellation token {cancellationToken}");
        var request = new HttpRequestMessage(HttpMethod.Get, requestUri);
        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        var response = await SendAsync(request, cancellationToken);
        response.EnsureSuccessStatusCode();
        await using var responseStream = await response.Content.ReadAsStreamAsync(cancellationToken);

        return await JsonSerializer.DeserializeAsync<T>(responseStream, options, cancellationToken: cancellationToken) ??
               throw new InvalidOperationException("Failed to deserialize response");
    }

    // GetStreamAsync
    public new async Task<Stream> GetStreamAsync(string requestUri, CancellationToken cancellationToken = default)
    {
        var request = new HttpRequestMessage(HttpMethod.Get, requestUri);
        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        var response = await SendAsync(request, cancellationToken);
        response.EnsureSuccessStatusCode();
        return await response.Content.ReadAsStreamAsync(cancellationToken);
    }

    public async Task<HttpResponseMessage> PutAsJsonAsync<T>([StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, T value, JsonSerializerOptions? options = null,
        CancellationToken cancellationToken = default) where T : notnull
    {
        options = GetJsonSerializerOptions(options);
        var request = new HttpRequestMessage(HttpMethod.Put, requestUri);
        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        Console.WriteLine($"Sending PUT {requestUri}");
        request.Content = new StringContent(JsonSerializer.Serialize(value, value.GetType(), options),
            Encoding.UTF8, "application/json");
        return await SendAsync(request, cancellationToken);
    }

    public async Task<HttpResponseMessage> PostAsJsonAsync<T>([StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, T value, JsonSerializerOptions? options = null,
        CancellationToken cancellationToken = default) where T : notnull
    {
        options ??= new();
        options.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull;
        var request = new HttpRequestMessage(HttpMethod.Post, requestUri);
        request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        request.Content = new StringContent(JsonSerializer.Serialize(value, value.GetType(), options),
            Encoding.UTF8, "application/json");
        return await SendAsync(request, cancellationToken);
    }

    public async IAsyncEnumerable<T?> GetAsyncEnumerableFromJsonAsync<T>([StringSyntax(StringSyntaxAttribute.Uri)] string? requestUri, JsonSerializerOptions? options = null)
    {
        options = GetJsonSerializerOptions(options);
        var res = await GetAsync(requestUri);
        var result = JsonSerializer.DeserializeAsyncEnumerable<T>(await res.Content.ReadAsStreamAsync(), options);
        await foreach (var resp in result)
        {
            yield return resp;
        }
    }

    public IAsyncEnumerable<TValue?> GetFromJsonAsAsyncEnumerable<TValue>(
        [StringSyntax("Uri")] string? requestUri,
        CancellationToken cancellationToken = default(CancellationToken)) =>
        GetAsyncEnumerableFromJsonAsync<TValue>(requestUri);
}