using CsharpHttpHelper;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using Work.Services;

namespace Work.Store.Api;

/// <summary>图片缓存接口，返回批量保存失败的 MD5 列表。</summary>
public sealed class ImageCacheApi
{
    private readonly ApiTransport _transport;

    public ImageCacheApi(ApiTransport transport)
        => _transport = transport ?? throw new ArgumentNullException(nameof(transport));

    public List<ImageCache> GetImageCaches(List<string> md5s)
        => _transport.GetRequired<List<ImageCache>>("ImageCache/GetImageCache", MethodType.Post, new { md5s });

    public List<string> SaveImageCaches(int platform, IReadOnlyList<ImageCache> images)
    {
        if (images == null) throw new ArgumentNullException(nameof(images));
        if (images.Count == 0) return new List<string>();
        try
        {
            _transport.Send<object>("ImageCache/AddOrUpdate", MethodType.Post,
                images.Select(image => new { md5 = image.Md5, Platform = platform, PlatformUrl = image.PlatformUrl }).ToArray());
            return new List<string>();
        }
        catch (ApiException ex) when (ex.Code == 500)
        {
            // 兼容旧服务的部分失败响应；没有明确失败项时保持整体失败。
            if (ex.ResponseData is JArray array && array.Count > 0 && array.All(item => item.Type == JTokenType.String))
                return array.ToObject<List<string>>();
            if (ex.ResponseData?.Type == JTokenType.String && !string.IsNullOrWhiteSpace((string)ex.ResponseData))
                return new List<string> { (string)ex.ResponseData };
            throw;
        }
    }
}