using System;
using System.Diagnostics;
using System.Windows.Forms;
using CefSharp;
using CefSharp.OffScreen;
using AngleSharp.Html.Dom;
using AngleSharp.Html.Parser;
using AngleSharp.Dom;
using System.Collections.Generic;
using System.Text;

namespace Arbitr
{
    public partial class Form1 : Form
    {
        ChromiumWebBrowser browser;

        IHtmlDocument angle;
        HtmlParser parser = new HtmlParser();

        string PlaceOfConsiderationSelector = "#chrono_list_content > div > div > div.b-chrono-cols.g-ec > div.r-col > h4 > span:nth-child(2) > span > a";
        string CurrentStep = "#b-case-header > div";
        string CauseSelector = "#b-container > div.b-noColumns-middle.g-fs-120 > dl > dt > span";
        string JudjeNameSelector = "#gr_case_judges > table > tbody > tr > td > div > ul > li";
        string JudjePlaceSelector = "#gr_case_judges > table > thead > tr > td > div > a";
        string DefendantsSelector = "#gr_case_partps > table > tbody > tr > td.defendants > div > ul > li:nth-child(1) > span";
        string ThirdPartiesSelector = "#gr_case_partps > table > tbody > tr > td.third > div > ul > li:nth-child(1) > span > a";
        string OtherPersonsSelector = "#gr_case_partps > table > tbody > tr > td.others > div > ul > li:nth-child(1) > span > a";
        string PlaintiffsSelector = "#gr_case_partps > table > tbody > tr > td.plaintiffs.first > div > ul > li:nth-child(1) > span";
        string hrefForJudjePlace;
        string hrefForPlace;

        public Form1()
        {
            InitializeComponent();
            InitializeChromium();

            browser.FrameLoadEnd += WebBrowserFrameLoadEnded;
        }

        private void WebBrowserFrameLoadEnded(object sender, FrameLoadEndEventArgs e)
        {
            Update();
        }

        public void InitializeChromium()
        {
            CefSettings settings = new CefSettings();
            Cef.Initialize(settings);
            browser = new ChromiumWebBrowser("https://kad.arbitr.ru/");
            //this.Controls.Add(browser);
            //browser.Dock = DockStyle.Fill;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            ClearTextInLabel();

            browser.Load($"https://kad.arbitr.ru/Card?number={textBox1.Text}");
        }

        private new async void Update()
        {
            ClearTextInLabel();

            string html = await browser.GetSourceAsync();

            if (!string.IsNullOrEmpty(html))
            {
                angle = parser.ParseDocument(html);
                if(angle.QuerySelector("#gr_case_partps > table > thead > tr > td.defendants > div") != null)
                {
                    if (angle.QuerySelector("#gr_case_partps > table > thead > tr > td.defendants > div").TextContent.Trim() == "Ответчики")
                    {
                        Debug.WriteLine(angle.QuerySelector("#gr_case_partps > table > thead > tr > td.defendants > div")?.TextContent);

                        if (GetElementsBySelector(PlaintiffsSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                PlaintiffsTop.Text = "Истцы:";

                                foreach (IElement element in GetElementsBySelector(PlaintiffsSelector))
                                {
                                    Plaintiffs.Text += element.TextContent.Trim() + "\n\n";
                                }
                            }));
                        }

                        if (GetElementsBySelector(DefendantsSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                StringBuilder stringBuilder = new StringBuilder();

                                foreach (IElement element in GetElementsBySelector(DefendantsSelector))
                                {
                                    Defendants.Text += element.TextContent.Trim() + "\n\n";
                                }

                                DefendantsTop.Text = "Ответчики:";
                            }));
                        }

                        if (GetElementsBySelector(ThirdPartiesSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                ThirdPartiestTop.Text = "Третьи лица:";

                                foreach (IElement element in GetElementsBySelector(ThirdPartiesSelector))
                                {
                                    ThirdParties.Text += element.TextContent.Trim();
                                }
                            }));
                        }

                        if (GetElementsBySelector(OtherPersonsSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                OtherPersonsTop.Text = "Иные лица:";

                                foreach (IElement element in GetElementsBySelector(OtherPersonsSelector))
                                {
                                    OtherPersons.Text += element.TextContent.Trim() + "\n\n";
                                }
                            }));
                        }

                        if (GetElementBySelector(CurrentStep) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                ReviewerText.Text = GetElementBySelector(CurrentStep).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(CurrentStep).GetAttribute("href");
                            }));
                        }
                        if (GetElementBySelector(PlaceOfConsiderationSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                Place.Text = GetElementBySelector(PlaceOfConsiderationSelector).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(PlaceOfConsiderationSelector).GetAttribute("href");
                            }));
                        }
                        if (GetElementBySelector(JudjeNameSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                JudjeName.Text = GetElementBySelector(JudjeNameSelector).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(JudjeNameSelector).GetAttribute("href");
                            }));
                        }
                        if (GetElementBySelector(CauseSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                Cause.Text = GetElementBySelector(CauseSelector).TextContent.Trim();
                            }));
                        }
                        if (GetElementBySelector(JudjePlaceSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                JudjePlace.Text = GetElementBySelector(JudjePlaceSelector).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(JudjePlaceSelector).GetAttribute("href");
                            }));
                        }
                    }
                    else
                    {
                        Debug.WriteLine(angle.QuerySelector("#gr_case_partps > table > thead > tr > td.defendants > div")?.TextContent);

                        if (GetElementsBySelector(PlaintiffsSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                foreach (IElement element in GetElementsBySelector(PlaintiffsSelector))
                                {
                                    Plaintiffs.Text += element.TextContent.Trim() + "\n\n";
                                }

                                PlaintiffsTop.Text = "Кредиторы (заявители):";
                            }));
                        }

                        if (GetElementsBySelector(DefendantsSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                StringBuilder stringBuilder = new StringBuilder();

                                foreach (IElement element in GetElementsBySelector(DefendantsSelector))
                                {
                                    Defendants.Text += element.TextContent.Trim() + "\n\n";
                                }

                                DefendantsTop.Text = "Должники:";
                            }));
                        }

                        if (GetElementsBySelector(ThirdPartiesSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                foreach (IElement element in GetElementsBySelector(ThirdPartiesSelector))
                                {
                                    ThirdParties.Text += element.TextContent.Trim();
                                }

                                ThirdPartiestTop.Text = "Третьи лица:";
                            }));
                        }

                        if (GetElementsBySelector(OtherPersonsSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                foreach (IElement element in GetElementsBySelector(OtherPersonsSelector))
                                {
                                    OtherPersons.Text += element.TextContent.Trim() + "\n\n";
                                }

                                OtherPersonsTop.Text = "Иные лица:";
                            }));
                        }

                        if (GetElementBySelector(CurrentStep) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                ReviewerText.Text = GetElementBySelector(CurrentStep).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(CurrentStep).GetAttribute("href");
                            }));
                        }
                        if (GetElementBySelector(PlaceOfConsiderationSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                Place.Text = GetElementBySelector(PlaceOfConsiderationSelector).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(PlaceOfConsiderationSelector).GetAttribute("href");
                            }));
                        }
                        if (GetElementBySelector(JudjeNameSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                JudjeName.Text = GetElementBySelector(JudjeNameSelector).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(JudjeNameSelector).GetAttribute("href");
                            }));
                        }
                        if (GetElementBySelector(CauseSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                Cause.Text = GetElementBySelector(CauseSelector).TextContent.Trim();
                            }));
                        }
                        if (GetElementBySelector(JudjePlaceSelector) != null)
                        {
                            Invoke((MethodInvoker)(() =>
                            {
                                JudjePlace.Text = GetElementBySelector(JudjePlaceSelector).TextContent.Trim();
                                hrefForPlace = GetElementBySelector(JudjePlaceSelector).GetAttribute("href");
                            }));
                        }
                    }

                }
            }
        }

        private void ClearTextInLabel()
        {
            Invoke((MethodInvoker)(() =>
            {
                ReviewerText.Text = string.Empty;
                OtherPersons.Text = string.Empty;
                ThirdParties.Text = string.Empty;
                Plaintiffs.Text = string.Empty;
                Defendants.Text = string.Empty;
                JudjePlace.Text = string.Empty;
                JudjeName.Text = string.Empty;
                Place.Text = string.Empty;
            }));
        }

        private List<IElement> GetElementsBySelector(string Selector)
        {
            IElement element = angle.QuerySelector(Selector);
            List<IElement> elements = new List<IElement>();

            int i = 1;

            while(element != null)
            {
                elements.Add(element);

                i++;

                Selector = Selector.Replace((i - 1).ToString(), i.ToString());

                element = angle.QuerySelector(Selector);

            }

            return elements;
        }

        private IElement GetElementBySelector(string Selector)
        {
            IElement element = angle.QuerySelector(Selector);

            if(element != null)
            {
                return element;
            }

            return null;
        }

        private void JudjePlace_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(hrefForJudjePlace))
            {
                Process.Start(hrefForJudjePlace);
            }
        }

        private void Place_Click(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(hrefForPlace))
            {
                Process.Start(hrefForPlace);
            }
        }
    }
}