using DbMigrate;
using System;
using System.ComponentModel;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DbMigrateTester.Forms.UserControls {
    public partial class DatabasePanel : DevExpress.XtraEditors.XtraUserControl {

        public string DbFilename {
            get { return txtDbFilename.Text; }
            set {
                txtDbFilename.Text = value;
                if (string.IsNullOrEmpty(value)) {
                    enableDbFilename();
                } else {
                    disableDbFilename();
                }
            }
        }

        public string Sql => rtfSql.Text;

        public SqlDatabase SqlDb { get; private set; }

        [Browsable(true)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
        public string FileLabel {
            get { return layoutControlItem1.Text; }
            set { layoutControlItem1.Text = value; }
        }

        public DatabasePanel() {
            InitializeComponent();
        }

        private async void DbFilename_ButtonClick(object sender, DevExpress.XtraEditors.Controls.ButtonPressedEventArgs e) {
            try {
                if (e.Button.Kind == DevExpress.XtraEditors.Controls.ButtonPredefines.Ellipsis) {
                    OpenFileDialog dlg = new OpenFileDialog() {
                        Filter = "Database Files (*.sql;*.sqlite;*.db)|*.sql;*.sqlite;*.db|SQL Files (*.sql)|*.sql|Sqlite Files (*.sqlite;*.db)|*.sqlite;*.db|Text Files (*.txt)|*.txt|All Files (*.*)|*.*",
                        CheckFileExists = true,
                        Multiselect = false,
                        Title = "Select Database File"
                    };
                    if (dlg.ShowDialog() == DialogResult.OK) {
                        await LoadDatabase(dlg.FileName);
                    }
                } else if (e.Button.Kind == DevExpress.XtraEditors.Controls.ButtonPredefines.Clear) {
                    txtDbFilename.Text = "";
                    rtfSql.Text = "";
                    treeList1.DataSource = null;
                    enableDbFilename();
                }
            } catch (Exception ex) {
                Console.WriteLine(ex.ToString());
            }
        }

        private void enableDbFilename(bool enabled = true) {
            txtDbFilename.ReadOnly = !enabled;
            txtDbFilename.Properties.Buttons[0].Visible = enabled;
            txtDbFilename.Properties.Buttons[1].Visible = !enabled;
        }

        private void disableDbFilename() {
            enableDbFilename(false);
        }

        public async Task LoadDatabase(string filename) {
            DbFilename = filename;
            disableDbFilename();

            SqlDatabase db = new SqlDatabase();
            if (Path.GetExtension(filename).ToLower() == ".sql" || Path.GetExtension(filename).ToLower() == ".txt") {
                // Load data from SQL file
                string sql = File.ReadAllText(filename);
                MatchCollection mc = Regex.Matches(sql, "^(CREATE TABLE( IF NOT EXISTS)? (\\w*).*\\);)", RegexOptions.Multiline | RegexOptions.Singleline);
                db.LoadSql(sql);
                rtfSql.Text = db.SqlScript;
            } else if (Path.GetExtension(filename).ToLower() == ".sqlite" || Path.GetExtension(filename).ToLower() == ".db") {
                // Load data from SQLite database file
                string sql = await db.BuildSql("Data Source=" + filename + "; Version=3;");
                rtfSql.Text = sql;
            } else {
                MessageBox.Show("Unsupported database file type: " + Path.GetExtension(filename), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }

            if (db.Tables != null && db.Tables.Count > 0) {
                treeList1.Columns.Clear();
                treeList1.Columns.Add(new DevExpress.XtraTreeList.Columns.TreeListColumn() { Caption = "Table Name", Visible = true, FieldName = "TableName" });
                treeList1.DataSource = db.Tables;
            }
            SqlDb = db;
        }
    }
}