using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Text.Json;

namespace AcaMate.V1.Services;
using AcaMate.V1.Models;

public class PushServiceWithP12
{
    private readonly string p12Path;
    private readonly string p12Password;
    private readonly string apnsTopic;

    public PushServiceWithP12(string keysFilePath, string p12Path, string apnsTopic)
    {
        // 존재 안하면 예외 던져 버리는거
        if (!File.Exists(keysFilePath))
        {
            Console.WriteLine($"File not found: {keysFilePath}");
            throw new FileNotFoundException("The specified file was not found", keysFilePath);
        }
        
        var keys = JsonSerializer.Deserialize<Dictionary<string, string>>(File.ReadAllText(keysFilePath));
        // TEST
        Console.WriteLine("Keys content:");
        foreach (var key in keys)
        {
            Console.WriteLine($"{key.Key}: {key.Value}");
        }
        
        p12Password = keys["Password"];
        this.p12Path = p12Path;
        this.apnsTopic = apnsTopic;
    }

    public async Task SendPushAsync(string uri,string deviceToken, string title, string body, int badge)
    {
        var payload = new Payload()
        {
            aps = new Aps()
            {
                alert = new Alert()
                {
                    title = title,
                    body = body
                },
                badge = badge
            }
        };
        var jsonPayload = JsonSerializer.Serialize(payload);
        
        
        var handler = new HttpClientHandler();
        
        try
        {
            var certificate = new X509Certificate2(p12Path, p12Password,
            X509KeyStorageFlags.MachineKeySet | X509KeyStorageFlags.PersistKeySet | X509KeyStorageFlags.Exportable
            );
            handler.ClientCertificates.Add(certificate);
            Console.WriteLine("Certificate successfully loaded.");
        }
        catch (CryptographicException ex)
        {
            Console.WriteLine($"CryptographicException: {ex.Message}");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Unexpected error: {ex.Message}");
        }
        
        
        
        using var client = new HttpClient(handler)
        {
            BaseAddress = new Uri($"{uri}")
        };

        client.DefaultRequestHeaders.Add("apns-topic", apnsTopic);
        client.DefaultRequestHeaders.Add("apns-priority", "10");

        var content = new StringContent(jsonPayload, Encoding.UTF8, "application/json");

        try
        {
            var response = await client.PostAsync($"/3/device/{deviceToken}", content);
            
            if (response.IsSuccessStatusCode)
            {
                Console.WriteLine("Push notification sent successfully.");
            }
            else
            {
                var errorContent = await response.Content.ReadAsStringAsync();
                Console.WriteLine($"Failed to send push notification. Status Code: {response.StatusCode}, Error: {errorContent}");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"An error occurred while sending the push notification: {ex.Message}");
        }
    }
}