using System.Net.Http.Json;
using System.Security.Cryptography;
using System.Text.Json;
using System.Xml.Linq;

namespace Salmon.Core;

public class Transmitter
{
    Cliff.Translator Translator { get; } = new();
    HttpClient Client { get; } = new();
    public Uri? BaseUrl { get; set; } = null;

    public async Task SendAsync(Uri uri, IEnumerable<Element> elements, CancellationToken tk = default)
    {
        List<Triplet> triplets = new();
        foreach (Element element in elements)
            triplets.AddRange(Translator.Encode(element));

        Console.WriteLine(JsonSerializer.Serialize(triplets));
        var result = await Client.PostAsJsonAsync(uri, triplets, cancellationToken: tk);

        if (!result.IsSuccessStatusCode)
            throw new Exception($"SendAsync call return code {result.StatusCode} when call {uri}.");

    }

    public async Task SendAsync(Uri uri, IEnumerable<Event> events, CancellationToken tk = default)
    {
        await Client.PostAsJsonAsync(uri, events, cancellationToken: tk);
    }

    public async Task SendAsync(IEnumerable<Element> elements, CancellationToken tk = default)
    {
        if (BaseUrl is null)
            throw new Exception("SendAsync call without defining BaseUrl.");

        Uri uri = new Uri(BaseUrl, "Push/Elements");

        await SendAsync(uri, elements, tk);
    }

    public async Task SendAsync(Element element, CancellationToken tk = default)
    {
        await SendAsync(new[] { element });
    }

    public async Task SendAsync(IEnumerable<Event> events, CancellationToken tk = default)
    {
        if (BaseUrl is null)
            throw new Exception("SendAsync call without defining BaseUrl.");

        Uri uri = new Uri(BaseUrl, "Push/Events");

        await Client.PostAsJsonAsync(uri, events, tk);
    }

    public async Task SendAsync(Event ev, CancellationToken tk = default)
    {
        await SendAsync(new[] { ev });
    }
}