using System;
using System.Collections.Generic;
using System.Windows.Forms;
using FastReport.Export;
using FastReport.Utils;

namespace FastReport.Cloud.StorageClient.S3
{
    /// <summary>
    /// Represents form of SkyDrive storage client.
    /// </summary>
    public partial class S3ClientForm : CloudStorageClientForm
    {
        #region Fields

        private S3StorageClient client;
        private List<ExportBase> exports;
        private Report report;

        #endregion // Fields

        #region Properties

        public S3StorageClient Client
        {
            get { return client; }
        }

        #endregion // Properties

        #region Constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="S3ClientForm"/> class.
        /// </summary>
        /// <param name="report">The report template.</param>
        public S3ClientForm(string accessKeyId, string secretAccessKey, string region, string host, Report report) : base(report)
        {
            client = new S3StorageClient();
            client.InitSigner(accessKeyId, secretAccessKey, region);
            client.Host = host;

            this.report = report;
            InitializeComponent();
            Localize();
            Init();
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();
        }

        #endregion // Constructors

        #region Private Methods

        private void Init()
        {

            exports = new List<ExportBase>();
            List<ObjectInfo> list = new List<ObjectInfo>();
            RegisteredObjects.Exports.EnumItems(list);
            cbFileType.Items.Add(Res.Get("Preview,SaveNative"));
            exports.Add(null);
            foreach (ObjectInfo info in list)
            {
                if (info.Object != null)
                {
                    cbFileType.Items.Add(Res.TryGet(info.Text));
                    exports.Add(Activator.CreateInstance(info.Object) as ExportBase);
                }
            }
            cbFileType.SelectedIndex = 0;

            tbFileName.Text = report.GetReportName;
            XmlItem xi = Config.Root.FindItem("S3").FindItem("StorageSettings");
            tbServer.Text = xi.GetProp("Server");
            tbPort.Text = xi.GetProp("Port");
            tbUsername.Text = xi.GetProp("Username");
            tbPassword.Text = xi.GetProp("Password");
        }

        protected override void OnShown(EventArgs e)
        {
            try
            {
                cbBucket.Items.AddRange(client.GetListBuckets().ToArray());
                if (cbBucket.Items.Count == 0)
                {
                    MessageBox.Show(Res.Get("Cloud,S3,MissingBuckets"), Res.Get("Messages,Error"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                    Close();
                }
                cbBucket.SelectedIndex = 0;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, Res.Get("Messages,Error"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                Close();
            }
            base.OnShown(e);
        }

        private bool IsNumeric(string str)
        {
            if (!String.IsNullOrEmpty(str))
            {
                try
                {
                    Convert.ToInt32(str);
                }
                catch
                {
                    return false;
                }
            }
            return true;
        }

        private CloudProxySettings GetProxySettings()
        {
            CloudProxySettings proxySettings = null;
            if (!String.IsNullOrEmpty(tbServer.Text))
            {
                int port = 0;
                if (!IsNumeric(tbPort.Text))
                {
                    FRMessageBox.Error(Res.Get("Cloud,CloudStorage,PortError"));
                }
                else
                {
                    port = Convert.ToInt32(tbPort.Text);
                }
                proxySettings = new CloudProxySettings(ProxyType.Http, tbServer.Text, port, tbUsername.Text, tbPassword.Text);
            }
            return proxySettings;
        }

        private bool Done()
        {
            if (!String.IsNullOrEmpty(tbPort.Text))
            {
                if (!IsNumeric(tbPort.Text))
                {
                    FRMessageBox.Error(Res.Get("Cloud,CloudStorage,PortError"));
                    tbPort.Focus();
                    return false;
                }
            }

            XmlItem xi = Config.Root.FindItem("S3").FindItem("StorageSettings");

            xi.SetProp("Server", tbServer.Text);
            xi.SetProp("Port", tbPort.Text);
            xi.SetProp("Username", tbUsername.Text);
            xi.SetProp("Password", tbPassword.Text);

            return true;
        }

        #endregion // Private Methods

        #region Public Methods

        /// <inheritdoc/>
        public override void Localize()
        {
            base.Localize();

            MyRes res = new MyRes("Cloud,CloudStorage");

            pgFile.Text = res.Get("File");
            pgProxy.Text = res.Get("Proxy");
            labelFileType.Text = res.Get("FileType");
            buttonSettings.Text = res.Get("Settings");
            labelServer.Text = res.Get("Server");
            labelUsername.Text = res.Get("Username");
            labelPassword.Text = res.Get("Password");

            this.Text = Res.Get("Cloud,S3");
            lbBucket.Text = Res.Get("Cloud,S3,Bucket");
            lbFileName.Text = Res.Get("Cloud,S3,FileName");
        }

        #endregion // Public Methods

        #region Events Handlers

        private void cbFileType_SelectedIndexChanged(object sender, EventArgs e)
        {
            buttonSettings.Enabled = cbFileType.SelectedIndex != 0;
        }

        private void buttonSettings_Click(object sender, EventArgs e)
        {
            ExportBase export = exports[cbFileType.SelectedIndex];
            export.SetReport(report);
            export.ShowDialog();
        }

        private void S3ClientForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (DialogResult == DialogResult.OK)
            {
                if (!Done())
                {
                    e.Cancel = true;
                }
            }
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            if (cbFileType.SelectedIndex == 0)
                client.FileName = tbFileName.Text + ".fpx";
            else
                client.FileName = tbFileName.Text + exports[cbFileType.SelectedIndex].GetFileExtension();

            client.CurrentBucket = cbBucket.SelectedItem.ToString();
            Cursor = Cursors.WaitCursor;
            client.ProxySettings = GetProxySettings();
            try
            {
                client.SaveReport(report, exports[cbFileType.SelectedIndex]);
            }
            catch (CloudStorageException ex)
            {
                MessageBox.Show(ex.Message, Res.Get("Messages,Error"), MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            DialogResult = DialogResult.OK;
            Close();
        }

        #endregion // Events Handlers
    }
}