using System.Net.Http.Headers;
using System.Net.Http.Json;
using Microsoft.Extensions.Logging;
using Volo.Abp.Settings;

namespace Erp.Sender.WhatsApp;

public interface IWhatsAppHttpClient
{
    Task<WhatsAppSendResultDto> SendMessageAsync(string To, string Message, string LanguageCode = "tr");
}

public sealed class WhatsAppHttpClient : IWhatsAppHttpClient, IDisposable
{
    private readonly HttpClient httpClient;
    private readonly ILogger<WhatsAppHttpClient> logger;
    private readonly ISettingProvider settingProvider;

    public WhatsAppHttpClient(
        HttpClient httpClient,
        ILogger<WhatsAppHttpClient> logger,
        ISettingProvider settingProvider)
    {
        this.httpClient = httpClient;
        this.logger = logger;
        this.settingProvider = settingProvider;
    }

    public async Task<WhatsAppSendResultDto> SendMessageAsync(string To, string Message, string LanguageCode = "tr")
    {
        var url = await settingProvider.GetOrNullAsync(WhatsAppSettingNames.Url);
        var templateName = await settingProvider.GetOrNullAsync(WhatsAppSettingNames.TemplateName);
        var token = await settingProvider.GetOrNullAsync(WhatsAppSettingNames.Token);
        var phoneId = await settingProvider.GetOrNullAsync(WhatsAppSettingNames.PhoneNumberId);

        httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);
        var response = await httpClient.PostAsJsonAsync($"{url}/{phoneId}/messages",
            new WhatsAppPostMessageInput
            {
                messaging_product = "whatsapp",
                to = To,
                type = "template",
                template = new WhatsAppPostMessageInput.Template
                {
                    name = templateName,
                    language = new WhatsAppPostMessageInput.Template.Language
                    {
                        code = LanguageCode
                    },
                    components =
                    [
                        new WhatsAppPostMessageInput.Template.Component
                        {
                            type = "body",
                            parameters =
                            [
                                new WhatsAppPostMessageInput.Template.Component.Parameter
                                {
                                    type = "text",
                                    text = Message
                                }
                            ]
                        }
                    ]
                }
            });
        return await response.Content.ReadFromJsonAsync<WhatsAppSendResultDto>();
    }

    public void Dispose() => httpClient?.Dispose();
}