using System.Net.Http.Json;

namespace MasstransferCommon.Utils;

public class ApiClient : IDisposable
{
    private static readonly HttpClient Client;

    static ApiClient()
    {
        Client = new HttpClient();
        Client.DefaultRequestHeaders.Accept.Clear();
        Client.DefaultRequestHeaders.Add("Accept", "application/json");
        Client.DefaultRequestHeaders.Add("Content-Type", "application/json");
    }

    /// <summary>
    /// 异步Get请求
    /// </summary>
    /// <param name="url"></param>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public static async Task<T?> GetAsync<T>(string url)
    {
        using var response = await Client.GetAsync(url);
        response.EnsureSuccessStatusCode();
        return await response.Content.ReadFromJsonAsync<T>();
    }

    /// <summary>
    /// 异步 Post请求
    /// </summary>
    /// <param name="url"></param>
    /// <param name="data"></param>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public static async Task<T?> PostAsync<T>(string url, object? data)
    {
        using var response = await Client.PostAsJsonAsync(url, data);
        response.EnsureSuccessStatusCode();
        return await response.Content.ReadFromJsonAsync<T>();
    }

    /// <summary>
    /// 异步 Put请求
    /// </summary>
    /// <param name="url"></param>
    /// <param name="data"></param>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public static async Task<T?> PutAsync<T>(string url, object? data)
    {
        using var response = await Client.PutAsJsonAsync(url, data);
        response.EnsureSuccessStatusCode();
        return await response.Content.ReadFromJsonAsync<T>();
    }

    /// <summary>
    /// 异步 Delete请求
    /// </summary>
    /// <param name="url"></param>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public static async Task<T?> DeleteAsync<T>(string url)
    {
        using var response = await Client.DeleteAsync(url);
        response.EnsureSuccessStatusCode();
        return await response.Content.ReadFromJsonAsync<T>();
    }
    
    /// <summary>
    /// 异步下载文件
    /// </summary>
    /// <param name="url"></param>
    /// <param name="filePath"></param>
    public static async Task DownloadFileAsync(string url, string filePath)
    {
        using var response = await Client.GetAsync(url);
        response.EnsureSuccessStatusCode();
    
        using var fs = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None);
        await response.Content.CopyToAsync(fs);
    }

    public void Dispose()
    {
        Client.Dispose();
    }
}