using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using DysonNetwork.Common.Interfaces;
using DysonNetwork.Common.Models;
using Microsoft.Extensions.Logging;
using NodaTime;
using NodaTime.Serialization.SystemTextJson;

namespace DysonNetwork.Common.Clients
{
    public class FileReferenceServiceClient : IFileReferenceServiceClient, IDisposable
    {
        private readonly HttpClient _httpClient;
        private readonly ILogger<FileReferenceServiceClient> _logger;
        private readonly JsonSerializerOptions _jsonOptions;

        public FileReferenceServiceClient(HttpClient httpClient, ILogger<FileReferenceServiceClient> logger)
        {
            _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
            _logger = logger ?? throw new ArgumentNullException(nameof(logger));
            
            _jsonOptions = new JsonSerializerOptions()
                .ConfigureForNodaTime(DateTimeZoneProviders.Tzdb);
            _jsonOptions.PropertyNameCaseInsensitive = true;
        }

        public async Task<CloudFileReference> CreateReferenceAsync(
            string fileId,
            string usage,
            string resourceId,
            Instant? expiredAt = null,
            Duration? duration = null)
        {
            var request = new
            {
                FileId = fileId,
                Usage = usage,
                ResourceId = resourceId,
                ExpiredAt = expiredAt,
                Duration = duration
            };

            var content = new StringContent(
                JsonSerializer.Serialize(request, _jsonOptions),
                Encoding.UTF8,
                "application/json");

            var response = await _httpClient.PostAsync("api/filereferences", content);
            response.EnsureSuccessStatusCode();
            
            await using var stream = await response.Content.ReadAsStreamAsync();
            var reference = await JsonSerializer.DeserializeAsync<CloudFileReference>(stream, _jsonOptions);
            return reference;
        }

        public async Task<CloudFileReference> GetReferenceAsync(string referenceId)
        {
            var response = await _httpClient.GetAsync($"api/filereferences/{referenceId}");
            response.EnsureSuccessStatusCode();
            
            await using var stream = await response.Content.ReadAsStreamAsync();
            var reference = await JsonSerializer.DeserializeAsync<CloudFileReference>(stream, _jsonOptions);
            return reference;
        }

        public async Task<IEnumerable<CloudFileReference>> GetReferencesForResourceAsync(string resourceId, string? usage = null)
        {
            var url = $"api/filereferences/resource/{resourceId}";
            if (!string.IsNullOrEmpty(usage))
            {
                url += $"?usage={Uri.EscapeDataString(usage)}";
            }
            
            var response = await _httpClient.GetAsync(url);
            response.EnsureSuccessStatusCode();
            
            await using var stream = await response.Content.ReadAsStreamAsync();
            var references = await JsonSerializer.DeserializeAsync<IEnumerable<CloudFileReference>>(stream, _jsonOptions);
            return references ?? Array.Empty<CloudFileReference>();
        }

        public async Task DeleteReferenceAsync(string referenceId)
        {
            var response = await _httpClient.DeleteAsync($"api/filereferences/{referenceId}");
            response.EnsureSuccessStatusCode();
        }

        public void Dispose()
        {
            _httpClient?.Dispose();
            GC.SuppressFinalize(this);
        }
    }
}