using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;
using FastReport.Utils;
using FastReport.Data;

namespace FastReport.Forms
{
    internal partial class BaseReportWizardForm : BaseWizardForm
    {
        private Report report;

        public Report Report
        {
            get { return report; }
        }

        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public DataSourceBase DataSource
        {
            get { return tvDataSources.SelectedNode == null ? null : tvDataSources.SelectedNode.Tag as DataSourceBase; }
        }

        [Browsable(false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public List<Column> SelectedColumns
        {
            get
            {
                List<Column> selectedColumns = new List<Column>();
                foreach (ListViewItem item in lvSelectedColumns.Items)
                {
                    selectedColumns.Add(item.Tag as Column);
                }
                return selectedColumns;
            }
        }

        public override int VisiblePanelIndex
        {
            get { return base.VisiblePanelIndex; }
            set
            {
                base.VisiblePanelIndex = value;
                if (value == 1)
                    UpdateColumnControls();
            }
        }

        #region "Select Datasource" page
        private void UpdateDatasources()
        {
            foreach (Base c in report.Dictionary.AllObjects)
            {
                if (c is DataSourceBase)
                    (c as DataSourceBase).Enabled = true;
            }
            tvDataSources.CreateNodes(report.Dictionary);

            if (tvDataSources.Nodes.Count > 0)
                tvDataSources.SelectedNode = tvDataSources.Nodes[0];
        }

        private void btnOpenDataDictionary_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                dialog.Filter = Res.Get("FileFilters,Dictionary");
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    report.Dictionary.Load(dialog.FileName);
                    tvDataSources.CreateNodes(report.Dictionary);
                }
            }
        }

        private void btnCreateNewDatasource_Click(object sender, EventArgs e)
        {
            using (DataWizardForm form = new DataWizardForm(report))
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    tvDataSources.CreateNodes(report.Dictionary);
                    DataConnectionBase connection = form.Connection;
                    string tableName = "";
                    foreach (DataSourceBase table in connection.Tables)
                    {
                        if (table.Enabled)
                        {
                            tableName = table.Alias;
                            break;
                        }
                    }
                    if (tableName != "")
                        tvDataSources.SelectedItem = tableName;
                }
            }
        }

        private void tvDataSources_AfterSelect(object sender, TreeViewEventArgs e)
        {
            UpdateColumns();
            btnNext.Enabled = DataSource != null;
        }
        #endregion

        #region "Select Columns" page
        private void UpdateColumns()
        {
            lvAvailableColumns.Items.Clear();
            lvSelectedColumns.Items.Clear();

            if (DataSource != null)
            {
                foreach (Column column in DataSource.Columns)
                {
                    ListViewItem item = lvAvailableColumns.Items.Add(column.Alias, column.GetImageIndex());
                    item.Tag = column;
                }
            }

            if (lvAvailableColumns.Items.Count > 0)
                lvAvailableColumns.Items[0].Selected = true;
            UpdateColumnControls();
        }

        private void UpdateColumnControls()
        {
            btnAddColumn.Enabled = lvAvailableColumns.SelectedItems.Count > 0;
            btnRemoveColumn.Enabled = lvSelectedColumns.SelectedItems.Count > 0;
            btnAddAllColumns.Enabled = lvAvailableColumns.Items.Count > 0;
            btnRemoveAllColumns.Enabled = lvSelectedColumns.Items.Count > 0;
            btnNext.Enabled = lvSelectedColumns.Items.Count > 0;

            bool reorderEnabled = lvSelectedColumns.SelectedItems.Count == 1;
            btnColumnUp.Enabled = reorderEnabled;
            btnColumnDown.Enabled = reorderEnabled;
            if (reorderEnabled)
            {
                if (lvSelectedColumns.SelectedIndices[0] == 0)
                    btnColumnUp.Enabled = false;
                if (lvSelectedColumns.SelectedIndices[0] == lvSelectedColumns.Items.Count - 1)
                    btnColumnDown.Enabled = false;
            }
        }

        private void lvAvailableColumns_SelectedIndexChanged(object sender, EventArgs e)
        {
            UpdateColumnControls();
        }

        private void lvSelectedColumns_SelectedIndexChanged(object sender, EventArgs e)
        {
            UpdateColumnControls();
        }

        public virtual void ColumnsChanged()
        {
            UpdateColumnControls();
        }

        private void btnAddColumn_Click(object sender, EventArgs e)
        {
            int index = 0;
            while (lvAvailableColumns.SelectedItems.Count > 0)
            {
                ListViewItem item = lvAvailableColumns.SelectedItems[0];
                index = item.Index;
                lvAvailableColumns.Items.Remove(item);
                lvSelectedColumns.Items.Add(item);
                item.Selected = false;
            }
            if (index >= lvAvailableColumns.Items.Count)
                index = lvAvailableColumns.Items.Count - 1;
            if (index < 0)
                index = 0;
            if (index < lvAvailableColumns.Items.Count)
                lvAvailableColumns.Items[index].Selected = true;
            ColumnsChanged();
        }

        private void btnAddAllColumns_Click(object sender, EventArgs e)
        {
            while (lvAvailableColumns.Items.Count > 0)
            {
                ListViewItem item = lvAvailableColumns.Items[0];
                lvAvailableColumns.Items.Remove(item);
                lvSelectedColumns.Items.Add(item);
            }
            ColumnsChanged();
        }

        private void btnRemoveColumn_Click(object sender, EventArgs e)
        {
            int index = 0;
            while (lvSelectedColumns.SelectedItems.Count > 0)
            {
                ListViewItem item = lvSelectedColumns.SelectedItems[0];
                index = item.Index;
                lvSelectedColumns.Items.Remove(item);
                lvAvailableColumns.Items.Add(item);
                item.Selected = false;
            }
            if (index >= lvSelectedColumns.Items.Count)
                index = lvSelectedColumns.Items.Count - 1;
            if (index < 0)
                index = 0;
            if (index < lvSelectedColumns.Items.Count)
                lvSelectedColumns.Items[index].Selected = true;
            ColumnsChanged();
        }

        private void btnRemoveAllColumns_Click(object sender, EventArgs e)
        {
            while (lvSelectedColumns.Items.Count > 0)
            {
                ListViewItem item = lvSelectedColumns.Items[0];
                lvSelectedColumns.Items.Remove(item);
                lvAvailableColumns.Items.Add(item);
            }
            ColumnsChanged();
        }

        private void btnColumnUp_Click(object sender, EventArgs e)
        {
            ListViewItem item = lvSelectedColumns.SelectedItems[0];
            int index = item.Index;
            lvSelectedColumns.Items.Remove(item);
            lvSelectedColumns.Items.Insert(index - 1, item);
            item.Selected = true;
            ColumnsChanged();
        }

        private void btnColumnDown_Click(object sender, EventArgs e)
        {
            ListViewItem item = lvSelectedColumns.SelectedItems[0];
            int index = item.Index;
            lvSelectedColumns.Items.Remove(item);
            lvSelectedColumns.Items.Insert(index + 1, item);
            item.Selected = true;
            ColumnsChanged();
        }
        #endregion

        public virtual void InitWizard(Report report)
        {
            this.report = report;
            VisiblePanelIndex = 0;
            btnCreateNewDatasource.Enabled = !Config.DesignerSettings.Restrictions.DontCreateData;
            btnOpenDataDictionary.Enabled = !Config.DesignerSettings.Restrictions.DontCreateData;
            UpdateDatasources();
        }

        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Forms,BaseReportWizard");

            panDataSource.Text = res.Get("SelectDataSourcePage");
            lblSelectDataSource.Text = res.Get("SelectDataSource");
            btnOpenDataDictionary.Text = res.Get("OpenDataDictionary");
            btnCreateNewDatasource.Text = res.Get("CreateNewDatasource");
            panColumns.Text = res.Get("SelectColumnsPage");
            lblSelectColumns.Text = res.Get("SelectColumns");
            lblAvailableColumns.Text = res.Get("AvailableColumns");
            lblSelectedColumns.Text = res.Get("SelectedColumns");
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            tvDataSources.ImageList = GetImages();
            lvAvailableColumns.SmallImageList = GetImages();
            lvSelectedColumns.SmallImageList = GetImages();
            btnColumnUp.Image = GetImage(208);
            btnColumnDown.Image = GetImage(209);
        }

        public BaseReportWizardForm()
        {
            InitializeComponent();
        }
    }
}