EARSystem

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.RateLimiting;
using Microsoft.AspNetCore.WebUtilities;
using Microsoft.Extensions.Options;
using EARSystem.Infrastructure;

namespace EARSystem.Web.Controllers;

[Authorize, EnableRateLimiting("maps"), Route("_AMapService")]
public class MapProxyController(IHttpClientFactory factory, IOptions<AMapOptions> config) : ControllerBase
{
    [HttpGet("{**path}")]
    public async Task<IActionResult> Proxy(string path, CancellationToken ct) {
        string[] allowed = ["v4/map/styles", "v3/assistant/coordinate/convert", "v3/geocode/geo",
            "v3/geocode/regeo", "v3/place/around", "v3/place/text", "v3/place/detail", "v5/place/around", "v5/place/text"];
        if (!allowed.Contains(path, StringComparer.Ordinal) || string.IsNullOrWhiteSpace(config.Value.JsSecurityCode)) return NotFound();
        var query = Request.Query.ToDictionary(x => x.Key, x => (string?)x.Value.ToString());
        query["jscode"] = config.Value.JsSecurityCode;
        query["key"] = config.Value.BrowserKey;
        var host = path == "v4/map/styles" ? "https://webapi.amap.com/" : "https://restapi.amap.com/";
        using var response = await factory.CreateClient("MapProxy").GetAsync(QueryHelpers.AddQueryString(host + path, query), ct);
        if (!response.IsSuccessStatusCode) return StatusCode(503);
        Response.Headers.CacheControl = "no-store";
        return File(await response.Content.ReadAsByteArrayAsync(ct), response.Content.Headers.ContentType?.ToString() ?? "application/json");
    }
}