using System;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web.Services;
using System.Web.UI.WebControls;
using System.Web;
using Newtonsoft.Json;
using System.Web.UI;
using SecuringWebApiUsingApiKey.Middleware;
using System.Configuration;
using Model;

namespace WebApp
{
    public partial class SelectTable : System.Web.UI.Page
    {
        private string ConnectionString = StringCipher.Decrypt(ConfigurationManager.ConnectionStrings["DocTesterconnectionstring"].ConnectionString, "i%!k!7pab%bNLdA5hE4pkR4XaB%E^jB3d9tHuQ4pbF&BZjF7SB#WBWit5#HrbJiLrLVm");


        private TableConfig CurrentTable =>
            TableConfigProvider.LoadConfig().Tables.FirstOrDefault(t => t.Key == ddlTables.SelectedValue);

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
                BindTables();
        }

        private void BindTables()
        {
            var config = TableConfigProvider.LoadConfig();
            ddlTables.DataSource = config.Tables;
            ddlTables.DataTextField = "DisplayName";
            ddlTables.DataValueField = "Key";
            ddlTables.DataBind();
            ddlTables.Items.Insert(0, "-- bitte wählen --");
        }

        protected void ddlTables_SelectedIndexChanged(object sender, EventArgs e)
        {
            gvData.PageIndex = 0;
            LoadTableData();
        }

        protected void gvData_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            gvData.PageIndex = e.NewPageIndex;
            LoadTableData();
        }

        private void LoadTableData()
        {
            if (ddlTables.SelectedIndex <= 0 || CurrentTable == null) return;
            var cfg = CurrentTable;

            using (var con = new SqlConnection(ConnectionString))
            using (var cmd = new SqlCommand(cfg.SqlList, con))
            {
                var dt = new DataTable();
                con.Open();
                dt.Load(cmd.ExecuteReader());
                gvData.DataSource = dt;
                gvData.DataBind();
            }
        }

        protected void gvData_RowCreated(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.Header)
                e.Row.Cells.Add(new TableHeaderCell { Text = "Details" });
        }

        protected void gvData_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType != DataControlRowType.DataRow) return;
            var cfg = CurrentTable;
            if (cfg == null) return;

            var id = DataBinder.Eval(e.Row.DataItem, cfg.IdField)?.ToString();
            if (string.IsNullOrEmpty(id)) return;

            string tableKeyJs = HttpUtility.JavaScriptStringEncode(cfg.Key);
            string idJs = HttpUtility.JavaScriptStringEncode(id);

            var cell = new TableCell();
            var lnk = new LinkButton
            {
                Text = "Öffnen",
                CssClass = "open"
            };
            lnk.OnClientClick = $"loadJson('{tableKeyJs}','{idJs}'); return false;";
            cell.Controls.Add(lnk);
            e.Row.Cells.Add(cell);
        }

        [WebMethod]
        //public static object GetJson(string table, string id)
        //{
        //    var config = TableConfigProvider.LoadConfig();
        //    var cfg = config.Tables.FirstOrDefault(t => t.Key == table);
        //    if (cfg == null) return new { error = "Tabelle nicht gefunden" };

        //    using (var con = new SqlConnection(StringCipher.Decrypt(ConfigurationManager.ConnectionStrings["DocTesterconnectionstring"].ConnectionString, "i%!k!7pab%bNLdA5hE4pkR4XaB%E^jB3d9tHuQ4pbF&BZjF7SB#WBWit5#HrbJiLrLVm")))
        //    using (var cmd = new SqlCommand(cfg.SqlById, con))
        //    {
        //        cmd.Parameters.AddWithValue("@id", id);
        //        con.Open();
        //        var json = cmd.ExecuteScalar()?.ToString();
        //        if (string.IsNullOrEmpty(json))
        //            return new { error = "Datensatz nicht gefunden" };
        //        return JsonConvert.DeserializeObject(json);
        //    }
        //}
        
        public static object GetJson(string table, string id)
        {
            var config = TableConfigProvider.LoadConfig();
            var cfg = config.Tables.FirstOrDefault(t => t.Key == table);
            if (cfg == null) return"Tabelle nicht gefunden" ;

            using (var con = new SqlConnection(StringCipher.Decrypt(ConfigurationManager.ConnectionStrings["DocTesterconnectionstring"].ConnectionString, "i%!k!7pab%bNLdA5hE4pkR4XaB%E^jB3d9tHuQ4pbF&BZjF7SB#WBWit5#HrbJiLrLVm")))
            using (var cmd = new SqlCommand(cfg.SqlById, con))
            {
                cmd.Parameters.AddWithValue("@id", id);
                con.Open();
                string json = cmd.ExecuteScalar()?.ToString();
                if (string.IsNullOrEmpty(json)) return "Datensatz nicht gefunden" ;

                try
                {
                    if (json.TrimStart().StartsWith("\""))
                    {
                        json = JsonConvert.DeserializeObject<string>(json);
                    }

                    Versandpaket vp = new Versandpaket();
                    vp = JsonConvert.DeserializeObject<Versandpaket>(json);
                    vp.finaldoc = "ABCD...";
                    foreach (Versanddokument vd in vp.Dokument)
                    {
                        vd.dokument = "ABC...";
                    }
                    //vp.Dokument.Clear();
                    json = JsonConvert.SerializeObject(vp, Formatting.Indented);
                  

                }
                catch (Exception ex) { }
                // JSON in Objekt parsen, damit PageMethods es korrekt als JS-Objekt liefert
                return  (json);
            }
        }
    }
}