using System.Net;
using Manager.YouTube;
using Microsoft.AspNetCore.Components;
using MudBlazor;

namespace Manager.App.Components.Dialogs
{
    public partial class AccountDialog : ComponentBase
    {
        [CascadingParameter] private IMudDialogInstance? MudDialog { get; set; }
        [Parameter] public string DefaultUserAgent { get; set; } = "";
        
        public YouTubeClient Client { get; set; } = new();

        private bool _isLoading;

        private bool _cookieTextValid;
        private string _cookieText = "";
        private string _cookieDomain = ".youtube.com";

        protected override void OnInitialized()
        {
            Client.UserAgent = DefaultUserAgent;
            base.OnInitialized();
        }
        
        private void ParseCookies()
        {
            try
            {
                var cookies = ParseCookieHeader(_cookieText, _cookieDomain);
                Client.CookieContainer.Add(cookies);
                _cookieText = string.Empty;
            }
            catch (Exception e)
            {
                SnackbarService.Add($"Parsing cookies failed: {e.Message}", Severity.Error);
            }
            StateHasChanged();
        }

        private static string? ValidateCookieText(string text)
        {
            if (string.IsNullOrWhiteSpace(text))
                return "Cookies are required";

            var pairs = text.Split(';', StringSplitOptions.RemoveEmptyEntries);
            foreach (var pair in pairs)
            {
                if (!pair.Contains('=')) return "Invalid.";
                var key = pair[..pair.IndexOf('=')].Trim();
                if (string.IsNullOrEmpty(key)) return "Invalid.";
            }

            return null;
        }

        public static CookieCollection ParseCookieHeader(string cookieHeader, string domain = "")
        {
            var collection = new CookieCollection();

            if (string.IsNullOrWhiteSpace(cookieHeader))
                return collection;

            var cookies = cookieHeader.Split(';', StringSplitOptions.RemoveEmptyEntries);

            foreach (var cookieStr in cookies)
            {
                var parts = cookieStr.Split('=', 2);
                if (parts.Length == 2)
                {
                    var name = parts[0].Trim();
                    var value = parts[1].Trim();

                    var cookie = new Cookie(name, value)
                    {
                        Expires = DateTime.Now.AddDays(1),
                        Path = "/",
                    };

                    if (!string.IsNullOrEmpty(domain))
                        cookie.Domain = domain;
                    
                    collection.Add(cookie);
                }
            }

            return collection;
        }

        private bool CanValidate()
        {
            if (string.IsNullOrWhiteSpace(Client.UserAgent) || Client.CookieContainer.Count <= 0)
            {
                return false;
            }

            return true;
        }

        private bool CanSave()
        {
            if (Client.ClientState == null)
            {
                return false;
            }

            if (string.IsNullOrWhiteSpace(Client.Id))
            {
                return false;
            }

            return Client.SapisidCookie != null && Client.ClientState.LoggedIn;
        }

        private async Task ValidateAccount()
        {
            _isLoading = true;
            var result = await Client.BuildClientAsync();
            if (!result.IsSuccess)
            {
                SnackbarService.Add(result.Error?.Description ?? "Error validating account.", Severity.Error);
            }
            _isLoading = false;
        }
        
        private void OnSave()
        {
            MudDialog?.Close(DialogResult.Ok(Client));
        }
    }
}