using System.Net.Http.Json;
using System.Text.Json;
using Moonlight.Api.Http.Services.ContainerHelper;
using Moonlight.Api.Http.Services.ContainerHelper.Requests;
using Moonlight.Api.Http.Services.ContainerHelper.Events;

namespace Moonlight.Api.Services;

public class ContainerHelperService
{
    private readonly IHttpClientFactory HttpClientFactory;

    public ContainerHelperService(IHttpClientFactory httpClientFactory)
    {
        HttpClientFactory = httpClientFactory;
    }

    public async Task<bool> CheckConnectionAsync()
    {
        var client = HttpClientFactory.CreateClient("ContainerHelper");

        try
        {
            var response = await client.GetAsync("api/ping");
            response.EnsureSuccessStatusCode();

            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

    public async IAsyncEnumerable<RebuildEventDto> RebuildAsync(bool noBuildCache)
    {
        var client = HttpClientFactory.CreateClient("ContainerHelper");

        var request = new HttpRequestMessage(HttpMethod.Post, "api/rebuild");

        request.Content = JsonContent.Create(
            new RequestRebuildDto(noBuildCache),
            null,
            SerializationContext.Default.Options
        );

        var response = await client.SendAsync(
            request,
            HttpCompletionOption.ResponseHeadersRead
        );

        if (!response.IsSuccessStatusCode)
        {
            var responseText = await response.Content.ReadAsStringAsync();

            yield return new RebuildEventDto()
            {
                Type = RebuildEventType.Failed,
                Data = responseText
            };

            yield break;
        }

        await using var responseStream = await response.Content.ReadAsStreamAsync();
        using var streamReader = new StreamReader(responseStream);

        do
        {
            var line = await streamReader.ReadLineAsync();

            if (line == null)
                break;

            if (string.IsNullOrWhiteSpace(line))
                continue;

            var data = line.Trim("data: ");
            var deserializedData = JsonSerializer.Deserialize<RebuildEventDto>(data, SerializationContext.Default.Options);

            yield return deserializedData;

            // Exit if service will go down for a clean exit
            if (deserializedData is { Type: RebuildEventType.Step, Data: "ServiceDown" })
                yield break;
        } while (true);

        yield return new RebuildEventDto()
        {
            Type = RebuildEventType.Succeeded,
            Data = string.Empty
        };
    }

    public async Task SetVersionAsync(string version)
    {
        var client = HttpClientFactory.CreateClient("ContainerHelper");

        var response = await client.PostAsJsonAsync(
            "api/configuration/version",
            new SetVersionDto(version),
            SerializationContext.Default.Options
        );

        if (response.IsSuccessStatusCode)
            return;

        var problemDetails =
            await response.Content.ReadFromJsonAsync<ProblemDetails>(SerializationContext.Default.Options);

        if (problemDetails == null)
            throw new HttpRequestException($"Failed to set version: {response.ReasonPhrase}");

        throw new HttpRequestException($"Failed to set version: {problemDetails.Detail ?? problemDetails.Title}");
    }
}