using Microsoft.AspNetCore.Mvc;

using System.Xml.Linq;

using System.Xml.XPath;

//<table class="common-table medium js-table js-streamable-table">

namespace WebApplication1.Controllers

{

    [ApiController]

    [Route("[controller]")]

    public class WeatherForecastController : ControllerBase

    {

        private static readonly string[] Summaries = new[]

        {

        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"

    };

        private readonly ILogger<WeatherForecastController> _logger;

        public WeatherForecastController(ILogger<WeatherForecastController> logger)

        {

            _logger = logger;

        }

        [HttpGet(Name = "GetWeatherForecast")]

        public async Task<string>  Get()

        {

            try

            {

                //HttpClient client = new HttpClient();

                //var uri = new Uri("" , 

                //var x = await client.GetStringAsync()"https://in.investing.com/equities/trending-stocks/technical");

                //https://in.investing.com/stock-screener/?sp=country::14|sector::a|industry::a|equityType::a<eq_market_cap:1

                //https://in.investing.com/stock-screener/?sp=country::14|sector::a|industry::a|equityType::a%3Ceq_market_cap;1

                //var url = "https://in.investing.com/equities/trending-stocks/technical";

                //var url = "https://in.investing.com/stock-screener/?" + Uri.EscapeDataString("sp=country::14|sector::a|industry::a|equityType::a<eq_market_cap:1");

                var url = "https://in.investing.com/equities/trending-stocks/technical";

                using var client = new HttpClient();

                var msg = new HttpRequestMessage(HttpMethod.Get, url);

                msg.Headers.Add("User-Agent", "Mozilla/5.0");

                var res = await client.SendAsync(msg);

                var content = await res.Content.ReadAsStringAsync();

                //XPathDocument xPath = new XPathDocument(content);

                //var nav = xPath.CreateNavigator();

                //var iter = nav.Select("/");

                //StreamReader textReader = new StreamReader(content);

                //XDocument doc = XDocument.Parse(content);

                //XElement xElement = XElement.Parse(content);

                int StartIndex = content.IndexOf("<table class=\"common-table medium js-table js-streamable-table\">");

                int EndIndex = content.IndexOf("</table>", StartIndex);

                string usefulContent = content.Substring(StartIndex, EndIndex+ 8  - StartIndex);

                //XDocument doc = XDocument.Parse(usefulContent);

                //XElement xElement = XElement.Parse(usefulContent);

                var lst = ParseString(usefulContent);

                Console.WriteLine(content);

            }

            catch ( Exception ex)

            {

            }

            return "test";

        }

        private  List<string> ParseString(string inpString)

        {

            string StartPattern = "<tr class=\"common-table-item u-clickable \"";

            string EndPattern = "</tr>";

            

            var lst = ExtractHtmlTags(inpString, StartPattern, EndPattern);

            var titleList = new List<String>();

            var hourList = new List<String>();

            var dayList = new List<String>();

            var weekList = new List<String>();

            var monthList = new List<String>();

            var companyList = new List<Company>();

            foreach (var item in lst)

            {

                Company company = new Company();

                company.Title = ExtractHtmlTags(ExtractHtmlTags(item, "<a", "</a>")[0], ">", "</", true)[0];

                company.Hourly = ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_hour", "</td>")[0], "<span class=\"text\">", "</span>", true)[0];

                company.Daily = ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_day", "</td>")[0], "<span class=\"text\">", "</span>", true)[0];

                company.Weekly = ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_week", "</td>")[0], "<span class=\"text\">", "</span>", true)[0];

                company.Monthly = ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_month", "</td>")[0], "<span class=\"text\">", "</span>", true)[0];

                companyList.Add(company);

                titleList.Add(ExtractHtmlTags(ExtractHtmlTags(item, "<a", "</a>")[0] , ">" , "</", true)[0]);

                hourList.Add(ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_hour", "</td>")[0] , "<span class=\"text\">" , "</span>", true)[0]);

                dayList.Add(ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_day", "</td>")[0], "<span class=\"text\">", "</span>", true)[0]);

                weekList.Add(ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_week", "</td>")[0], "<span class=\"text\">", "</span>", true)[0]);

                monthList.Add(ExtractHtmlTags(ExtractHtmlTags(item, "<td class=\"col-technical_month", "</td>")[0], "<span class=\"text\">", "</span>", true)[0]);

            }

            return lst;

        }

        private List<string> ExtractHtmlTags(string inpString , string StartPattern, string EndPattern, bool excludePatterns = false)

        {

            List<string> lst = new List<string>();

            int StartIndex = 0; int EndIndex = 0;

            StartIndex = inpString.IndexOf(StartPattern);

            EndIndex = inpString.IndexOf(EndPattern, StartIndex + 1);

            while (StartIndex > 0 && EndIndex > 0)

            {

                int substringStartIndex = StartIndex;

                int substringEndIndex = EndIndex - StartIndex + EndPattern.Length;

                if ( excludePatterns)

                {

                    substringStartIndex = StartIndex + StartPattern.Length;

                    substringEndIndex = EndIndex - substringStartIndex;

                }

                string trString = inpString.Substring(substringStartIndex, substringEndIndex);

                lst.Add(trString);

                if (EndIndex + EndPattern.Length + 1 >= inpString.Length) break;

                StartIndex = inpString.IndexOf(StartPattern, EndIndex);

                EndIndex = inpString.IndexOf(EndPattern, StartIndex + 1);

            }

            return lst;

        }

    }

    public class Company

    {

        public string? Title {  get; set; }

        public string? Hourly { get; set; }

        public string? Daily { get; set; }

        public string? Weekly { get; set; }

        public string? Monthly { get; set; }

    }

}