using System;
using System.Net;
using System.Linq;

namespace NEW_FB_Api
{
    public class Account
    {
        private bool debug = false;

        public Account(bool debug)
        {
            this.debug = debug;
        }

        private Helpers helpers = new Helpers();
        private HttpRequests MyRequests = new HttpRequests();

        public string SessionID { get; set; }
        private string LoginCSRF { get; set; }
        private string RegisterCSRF { get; set; }
        private string CheckCSRF { get; set; }

        public bool Login(string user, string pass, string proxy = "")
        {
            LoginCSRF = helpers.GetCSRF("https://www.instagram.com/accounts/login/", proxy);
            helpers.Log(debug, "Grabbed Login CSRF: " + LoginCSRF);

            string post = "username=" + user + "&password=" + pass;
            string url = "https://www.instagram.com/accounts/login/ajax/";

            string[] headers = new string[]
            {
                "Host: www.instagram.com",
                "User-Agent: " + helpers.GetUserAgent(proxy),
                "Accept: */*",
                "Accept-Language: en-US,en;q=0.5",
                "X-CSRFToken: " + LoginCSRF,
                "X-Instagram-AJAX: 1",
                "Content-Type: application/x-www-form-urlencoded",
                "X-Requested-With: XMLHttpRequest",
                "Referer: https://www.instagram.com/accounts/login/",
                "Cookie: csrftoken=" + LoginCSRF + "; mid=WFOHewAEAAEl7tki8YuogH4lc9rS; ig_pr=1; ig_vw=1366",
                "Connection: keep-alive",
            };

            HttpWebRequest request = MyRequests.Create(url, HttpRequests.Method.POST, headers);

            if (proxy != string.Empty && proxy.Contains(":"))
            {
                string[] splitter = proxy.Split(':');
                WebProxy prox = new WebProxy(splitter[0], Int32.Parse(splitter[1]));
                prox.BypassProxyOnLocal = true;
                request.Proxy = prox;
                helpers.Log(debug, "Proxy Set: " + proxy);
            }

            MyRequests.Write(request, post);

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            string html = MyRequests.GetSource(response);
            helpers.Log(debug, "Login HTML: " + html);

            if (html.Contains("\"authenticated\": true"))
            {
                string cookieName = "sessionid";
                string cookie = response.Headers.GetValues("Set-Cookie").First(x => x.StartsWith(cookieName));
                SessionID = cookie.Replace(cookieName + "=", string.Empty);
                helpers.Log(debug, "Session ID: " + SessionID);
                helpers.Log(debug, "Authenticated User: " + user);
                return true;
            }
            else
            {
                helpers.Log(debug, "Authentication failed");
                return false;
            }
        }


        public bool Register(string username, string email, string password, string fullname, string proxy = "")
        {
            fullname = fullname.Replace(" ", "+");
            email = email.Replace("@", "%40");

            RegisterCSRF = helpers.GetCSRF("https://www.instagram.com/", proxy);
            helpers.Log(debug, "Register CSRF: " + RegisterCSRF);

            string url = "https://www.instagram.com/accounts/web_create_ajax/";
            string post = "email=" + email + "&password=" + password + "&username=" + username + "&first_name=" + fullname;

            string[] headers = new string[]
            {
                "Host: www.instagram.com",
                "User-Agent: " + helpers.GetUserAgent(proxy),
                "Accept: */*",
                "Accept-Language: en-US,en;q=0.5",
                "X-CSRFToken: " + RegisterCSRF,
                "X-Instagram-AJAX: 1",
                "Content-Type: application/x-www-form-urlencoded",
                "X-Requested-With: XMLHttpRequest",
                "Connection: keep-alive",
                "Cookie: mid=WFTOrAAEAAGeFe3by_c5bY_ODw_U; ig_pr=1; ig_vw=1366; csrftoken=" + RegisterCSRF,
                "Referer: https://www.instagram.com/"
            };

            HttpWebRequest request = MyRequests.Create(url, HttpRequests.Method.POST, headers);

            if (proxy != string.Empty && proxy.Contains(":"))
            {
                string[] splitter = proxy.Split(':');
                WebProxy prox = new WebProxy(splitter[0], Int32.Parse(splitter[1]));
                prox.BypassProxyOnLocal = true;
                request.Proxy = prox;
                helpers.Log(debug, "Proxy Set: " + proxy);
            }

            MyRequests.Write(request, post);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            string html = MyRequests.GetSource(response);
            helpers.Log(debug, "Register HTML: " + html);

            if (html.Contains("\"account_created\": true"))
            {
                helpers.Log(debug, "An account has been created with the username: " + username);
                return true;
            }
            else
            {
                helpers.Log(debug, "Account Creation Failed");
                return false;
            }
        }

        public bool IsUsernameAvailable(string username)
        {
            CheckCSRF = helpers.GetCSRF("https://www.instagram.com/");
            helpers.Log(debug, "Check Username CSRF: " + CheckCSRF);

            string url = "https://www.instagram.com/accounts/web_create_ajax/attempt/";
            string post = "email=email%40provider.com&password=password&username=" + username + "&first_name=chris";

            string[] headers = new string[]
            {
                "Host: www.instagram.com",
                "User-Agent: " + helpers.GetUserAgent(),
                "Accept: */*",
                "Accept-Language: en-US,en;q=0.5",
                "X-CSRFToken: " + CheckCSRF,
                "X-Instagram-AJAX: 1",
                "Content-Type: application/x-www-form-urlencoded",
                "X-Requested-With: XMLHttpRequest",
                "Connection: keep-alive",
                "Cookie: mid=WFTOrAAEAAGeFe3by_c5bY_ODw_U; ig_pr=1; ig_vw=1366; csrftoken=" + CheckCSRF,
                "Referer: https://www.instagram.com/"
            };

            HttpWebRequest request = MyRequests.Create(url, HttpRequests.Method.POST, headers);

            MyRequests.Write(request, post);

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            string html = MyRequests.GetSource(response);

            if (!html.Contains("Sorry, that username is taken"))
            {
                helpers.Log(debug, username + " is available");
                return true;
            }
            else
            {
                helpers.Log(debug, username + " is taken");
                return false;
            }
        }
    }
}