using System.Text.Json;
using System.Text.Json.Serialization;
using ForgejoReleaseSync.DTOs;
using ForgejoReleaseSync.DTOs.Forgejo;
using Microsoft.Extensions.Logging;

namespace ForgejoReleaseSync.Services;

public class GithubService(IHttpClientFactory httpClientFactory, ILogger<GithubService> logger)
{
    public async Task<List<GithubReleaseResponseDto>> FetchRepoReleasesAsync(
        string owner, string repo, CancellationToken token = default)
    {
        try
        {
            var httpClient = httpClientFactory.CreateClient("github");

            using var response = await httpClient.GetAsync(
                $"repos/{owner}/{repo}/releases?per_page=3&page=1", token);
            response.EnsureSuccessStatusCode();

            await using var stream = await response.Content.ReadAsStreamAsync(token);
            var releases = await JsonSerializer.DeserializeAsync(
                stream, AppJsonSerializerContext.Default.ListGithubReleaseResponseDto, token);

            return releases ?? [];
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Failed to fetch GitHub releases for {Owner}/{Repo}", owner, repo);
            throw;
        }
    }
}

[JsonSerializable(typeof(List<GithubReleaseResponseDto>))]
[JsonSerializable(typeof(ForgejoCreateReleaseDto))]
[JsonSerializable(typeof(ForgejoReleaseResponseDto))]
[JsonSerializable(typeof(List<ForgejoReleaseResponseDto>))]
internal partial class AppJsonSerializerContext : JsonSerializerContext
{
}