using System;
using FastReport.Cloud.FastReport.Models.DataSource;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text;
using System.Windows.Forms;
using FastReport.Auth;
using FastReport.Cloud.FastReport;
using FastReport.Cloud.FastReport.ListViewCloud;
using FastReport.Data;
using FastReport.Data.JsonConnection;
using FastReport.Utils;
using XmlDocument = FastReport.Utils.XmlDocument;


namespace FastReport.Forms
{
    internal partial class CloudDataSourceForm : BaseDialogForm
    {
        internal string dataSourceId = null;
        internal DataConnectionBase dataConnection;
        private readonly MyRes localizator = new MyRes("Forms,CloudDataSourceForm");
        private readonly MyRes localizatorError = new MyRes("Forms,ListViewForm");

        private readonly string STATUS_CONNECTED;
        private readonly string STATUS_ERROR;
        private readonly string STATUS_UPDATING;
        private DataSourceVM dataSource;
        internal List<XmlItem> tableStructure;

        public CloudDataSourceForm()
        {
            STATUS_CONNECTED = localizator.Get("StatusConnected");
            STATUS_ERROR = localizator.Get("StatusError");
            STATUS_UPDATING = localizator.Get("StatusUpdating");
            InitializeComponent();
            Localize();
            UpdateDpiDependencies();
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            DSName.Width = DSConnectionType.Width = DSStatus.Width = listView1.Width / 3 - SystemInformation.VerticalScrollBarWidth;
        }

        private void FillListView()
        {
            DataSourcesVM dataSourcesCollection = DataSourceManager.GetAvailableDataSourcesCommand(
                new DataSourcesOptions()
                { SubscriptionId = ProviderManager.Subscription.Id, Skip = 0, Take = 50 });

            if (dataSourcesCollection.Count == 0)
            {
                this.NoConnectionsLabel.Visible = true;
                this.listView1.Visible = false;
            }
            else
            {
                this.NoConnectionsLabel.Visible = false;
                this.listView1.Visible = true;
                foreach (var dataSource in dataSourcesCollection.DataSources)
                {
                    var item = new ListViewItem();
                    item.Text = dataSource.Name;
                    item.Tag = dataSource.Id;
                    string status = "";
                    switch (dataSource.Status)
                    {
                        case DataSourceStatus.Connected:
                            status = STATUS_CONNECTED;
                            break;
                        case DataSourceStatus.Error:
                            status = STATUS_ERROR;
                            break;
                        case DataSourceStatus.Updating:
                            status = STATUS_UPDATING;
                            break;
                    }
                    item.SubItems.AddRange(new string[]
                    {
                        dataSource.ConnectionType.ToString(), status
                    });
                    listView1.Items.Add(item);
                }
            }
        }

        internal bool SetProvider()
        {
            try
            {
                ProviderManager.SetProvider(new FRCloudProvider(AuthService.Instance), FilesModeItem.FilesMode);
                return true;
            }
            catch (WebException)
            {
                MessageBox.Show(localizatorError.Get("ErrorMessageBox,ErrorInApiOrServer"), localizatorError.Get("ErrorMessageBox,Caption"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                this.Close();
                return false;
            }
        }

        private void FillSubscriptions()
        {
            foreach (var subscriptionVm in ProviderManager.Subscriptions)
            {
                subscriptionsCmbx.Items.Add(subscriptionVm.Name);
            }

            int i = 0;
            foreach (var provider in ProviderManager.Subscriptions)
            {
                if (provider == ProviderManager.Subscription)
                {
                    subscriptionsCmbx.SelectedIndex = i;
                    break;
                }
                i++;
            }
        }

        internal void OnLoad()
        {
            FillSubscriptions();
        }

        private void ListView1OnMouseClick(object sender, MouseEventArgs e)
        {
            if (listView1.SelectedItems.Count > 0)
            {
                var item = listView1.SelectedItems[0];
                dataSourceId = item.Tag.ToString();
                this.btnOk.Enabled = true;
            }
        }

        private void CloudDataSourceForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (DialogResult == DialogResult.OK)
            {
                dataSource = DataSourceManager.GetDataSourceCommand(dataSourceId);
                tableStructure = GetTablesStructure();

                switch (dataSource.ConnectionType)
                {
                    case DataSourceConnectionType.MSSQL:
#if AVALONIA
                        dataConnection = GetInstance("FastReport.Data.MsSqlDataConnection");
#else
                        dataConnection = new MsSqlDataConnection();
#endif
                        break;
                    case DataSourceConnectionType.CSV:
                        dataConnection = new CsvDataConnection();
                        break;
                    case DataSourceConnectionType.XML:
                        dataConnection = new XmlDataConnection();
                        break;
                    case DataSourceConnectionType.JSON:
                        dataConnection = new JsonDataSourceConnection();
                        break;
                    case DataSourceConnectionType.FirebirdDB:
                        dataConnection = GetInstance("FastReport.Data.FirebirdDataConnection");
                        break;
                    case DataSourceConnectionType.MongoDB:
                        dataConnection = GetInstance("FastReport.Data.MongoDBDataConnection");
                        break;
                    case DataSourceConnectionType.MySQL:
                        dataConnection = GetInstance("FastReport.Data.MySqlDataConnection");
                        break;
                    case DataSourceConnectionType.OracleDB:
                        dataConnection = GetInstance("FastReport.Data.OracleDataConnection");
                        break;
                    case DataSourceConnectionType.Postgres:
                        dataConnection = GetInstance("FastReport.Data.PostgresDataConnection");
                        break;
                }

                if (dataConnection == null)
                {
                    MessageBox.Show(localizator.Get("PluginNotAdded"), localizator.Get("StatusError"));
                    return;
                }

                dataConnection.ConnectionString = dataSource.ConnectionString;
                dataConnection.Name = dataSource.Name;
                dataConnection.CloudId = dataSourceId;
            }
        }

        private List<XmlItem> GetTablesStructure()
        {
            if (dataSource.DataStructure == null)
                return null;

            // TODO: xml ReadHeader
            MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + dataSource.DataStructure));

            XmlDocument document = new XmlDocument();
            document.Load(ms);
            var items = document.Root.Items;

            return items;
        }

        private static DataConnectionBase GetInstance(string strFullyQualifiedName)
        {
            Type type = Type.GetType(strFullyQualifiedName);
            if (type != null)
                return (DataConnectionBase)Activator.CreateInstance(type);
            var assemblies = AppDomain.CurrentDomain.GetAssemblies();
            foreach (var asm in assemblies)
            {
                type = asm.GetType(strFullyQualifiedName);
                if (type != null)
                    return (DataConnectionBase)Activator.CreateInstance(type);
            }
            return null;
        }

        public override void Localize()
        {
            base.Localize();
            this.NoConnectionsLabel.Text = localizator.Get("NotFoundSources");
            this.SelectSourcesLabel.Text = localizator.Get("SelectSources");
            this.Text = localizator.Get("Caption");
            this.DSConnectionType.Text = localizator.Get("TypeConnection");
            this.DSStatus.Text = localizator.Get("StatusConnection");
            this.DSName.Text = localizator.Get("NameConnection");
        }

        private void SubscriptionsCmbxOnSelectedValueChanged(object sender, EventArgs e)
        {
            var backupSubscription = ProviderManager.Subscription;
            var cmbx = sender as ComboBox;
            foreach (var subscriptionVm in ProviderManager.Subscriptions)
            {
                if (subscriptionVm.Name == cmbx.Text)
                {
                    ProviderManager.Subscription = subscriptionVm;
                    break;
                }
            }
            this.listView1.Items.Clear();
            dataSourceId = null;
            this.btnOk.Enabled = false;
            try
            {
                FillListView();
            }
            catch (WebException ex)
            {
                if ((ex.Response as HttpWebResponse).StatusCode == HttpStatusCode.PaymentRequired)
                {

                    MessageBox.Show(Res.Get("Forms,ListViewForm,ErrorMessageBox,ErrorInSubscriptions402"), Res.Get("Designer,ListViewForm,ErrorMessageBox,CaptionSubscriptions402"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                    ProviderManager.Subscription = backupSubscription;
                    subscriptionsCmbx.Text = backupSubscription.Name;
                    FillListView();
                }
            }

        }
    }
}