using System.Text;
using PrismaticSync.Infrastructure;

namespace PrismaticSync.Services;

/// <summary>
/// Pushes the scraped JSON to the app's token-authenticated catalog import endpoint. When no
/// endpoint is configured it no-ops (the JSON is still on disk for a manual upload), so the tool is
/// useful before the endpoint exists.
/// </summary>
public class CatalogPusher
{
    private readonly SyncConfig _config;

    public CatalogPusher(SyncConfig config) => _config = config;

    public async Task<bool> PushAsync()
    {
        if (string.IsNullOrWhiteSpace(_config.Import.EndpointUrl))
        {
            Log.Warn($"No import endpoint configured (Sync.Import.EndpointUrl) — skipping push. " +
                     $"Upload {_config.OutputJsonFile} manually via the Powder Catalog admin instead.");
            return false;
        }

        if (!File.Exists(_config.OutputJsonFile))
        {
            Log.Warn($"Output file {_config.OutputJsonFile} not found — nothing to push.");
            return false;
        }

        var json = await File.ReadAllTextAsync(_config.OutputJsonFile);
        Log.Info($"Pushing {_config.OutputJsonFile} to {_config.Import.EndpointUrl} (vendor: {_config.Import.VendorName})...");

        using var http = new HttpClient { Timeout = TimeSpan.FromMinutes(5) };
        using var request = new HttpRequestMessage(HttpMethod.Post, _config.Import.EndpointUrl);
        request.Headers.Add("X-Import-Token", _config.Import.Token);
        request.Headers.Add("X-Vendor-Name", _config.Import.VendorName);
        request.Content = new StringContent(json, Encoding.UTF8, "application/json");

        try
        {
            using var response = await http.SendAsync(request);
            var body = await response.Content.ReadAsStringAsync();

            if (response.IsSuccessStatusCode)
            {
                Log.Info($"Push succeeded ({(int)response.StatusCode}): {Trim(body)}");
                return true;
            }

            Log.Error($"Push failed ({(int)response.StatusCode}): {Trim(body)}");
            return false;
        }
        catch (Exception ex)
        {
            Log.Error($"Push error: {ex.Message}");
            return false;
        }
    }

    private static string Trim(string s) => s.Length > 500 ? s[..500] + "…" : s;
}