using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace YD_Event.Web.Entry.Controllers;

/// <summary>
/// 官网赛事公开数据。只转发赛事服务的已发布状态，不提供草稿或写入接口。
/// </summary>
[ApiController]
[AllowAnonymous]
[Route("api/competition")]
public sealed class CompetitionPublicController : ControllerBase
{
    private readonly IConfiguration _configuration;
    private readonly IHttpClientFactory _httpClientFactory;

    public CompetitionPublicController(IConfiguration configuration, IHttpClientFactory httpClientFactory)
    {
        _configuration = configuration;
        _httpClientFactory = httpClientFactory;
    }

    [HttpGet("state")]
    public async Task<IActionResult> GetState()
    {
        var adminUrl = _configuration["CompetitionApi:AdminUrl"]
            ?? "http://127.0.0.1:8787/api/competition/admin";
        if (!Uri.TryCreate(adminUrl, UriKind.Absolute, out var adminTarget)
            || (adminTarget.Scheme != Uri.UriSchemeHttp && adminTarget.Scheme != Uri.UriSchemeHttps)
            || adminTarget.AbsolutePath != "/api/competition/admin"
            || !string.IsNullOrEmpty(adminTarget.Query))
            return StatusCode(503, new { error = "官网赛事接口地址无效" });

        var target = new Uri(adminTarget, "state");

        Response.Headers["Cache-Control"] = "no-store";
        try
        {
            var client = _httpClientFactory.CreateClient("WebsiteCompetition");
            client.Timeout = TimeSpan.FromSeconds(15);
            using var upstreamResponse = await client.GetAsync(target, HttpContext.RequestAborted);
            var response = await upstreamResponse.Content.ReadAsStringAsync(HttpContext.RequestAborted);
            return new ContentResult
            {
                Content = response,
                ContentType = "application/json; charset=utf-8",
                StatusCode = (int)upstreamResponse.StatusCode
            };
        }
        catch (HttpRequestException)
        {
            return StatusCode(502, new { error = "官网赛事接口连接失败" });
        }
        catch (TaskCanceledException) when (!HttpContext.RequestAborted.IsCancellationRequested)
        {
            return StatusCode(504, new { error = "官网赛事接口响应超时" });
        }
    }
}