using System.Net.Mime;
using System.Text;
using Microsoft.AspNetCore.WebUtilities;
using Newtonsoft.Json;
using Treestar.Shared.Models;

namespace Treestar.Shared.AccessLayers;

public abstract class ApiAccessLayer
{
    private readonly HttpClient _httpClient;
    private readonly IAccessLayerAuthenticationProvider _authenticationProvider;

    protected ApiAccessLayer(string apiBaseUrl, IAccessLayerAuthenticationProvider authenticationProvider)
    {
        _authenticationProvider = authenticationProvider;
        var handler = new HttpClientHandler() 
        { 
            ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator
        };
        _httpClient = new HttpClient(handler);
        _httpClient.BaseAddress = new Uri(apiBaseUrl, UriKind.Absolute);
    }

    private async Task<HttpResponseWrapper> SendRequest(HttpRequestMessage message)
    {
        await _authenticationProvider.AddAuthentication(message);
        var response = await _httpClient.SendAsync(message);
        return new HttpResponseWrapper()
        {
            HttpResponseMessage = response
        };
    }

    private async Task<HttpResponseWrapper<T>> SendRequest<T>(HttpRequestMessage message)
    {
        var wrapper = await SendRequest(message);
        if (wrapper.HttpResponseMessage.IsSuccessStatusCode)
        {
            var parsedJson =
                JsonConvert.DeserializeObject<T>(await wrapper.HttpResponseMessage.Content.ReadAsStringAsync());
            return new HttpResponseWrapper<T>
            {
                HttpResponseMessage = wrapper.HttpResponseMessage,
                ResponseObject = parsedJson
            };
        }
        return new HttpResponseWrapper<T>
        {
            HttpResponseMessage = wrapper.HttpResponseMessage,
            ResponseObject = default(T)
        };

    }

    protected HttpRequestMessage CreateRequestMessage(string endpoint, HttpMethod method, Dictionary<string, string>? queryParams = null,
        object? data = null)
    {
        HttpRequestMessage message = new HttpRequestMessage();
        string uri = endpoint;
        if (queryParams != null)
        {
            uri = QueryHelpers.AddQueryString(endpoint, queryParams);
        }
        message.RequestUri = new Uri(uri, UriKind.Relative);
        message.Method = method;
        if (data != null)
        {
            message.Content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, MediaTypeNames.Application.Json);
        }

        return message;
    }

    protected async Task<HttpResponseWrapper> SendRequest(string endpoint, HttpMethod method, Dictionary<string, string>? queryParams = null, object? data = null)
    {
        HttpRequestMessage message = CreateRequestMessage(endpoint, method, queryParams, data);
        return await SendRequest(message);
    }
    
    protected async Task<HttpResponseWrapper<T>> SendRequest<T>(string endpoint, HttpMethod method, Dictionary<string, string>? queryParams = null, object? data = null)
    {
        HttpRequestMessage message = CreateRequestMessage(endpoint, method, queryParams, data);
        return await SendRequest<T>(message);
    }
}