//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Collections;

namespace Spludlow
{
	public class WebForms
	{
		public static string[] ReadForm(Page page, DataRow row)
		{
			return ReadForm(page, row, "");
		}

		public static string[] ReadForm(Page page, DataRow row, string namePrefix)
		{
			List<string> errors = new List<string>();

			string[] controlTypes = new string[]
			{
				"TextBox", "DropDownList", "Calendar", "CheckBox"
			};

			foreach (DataColumn column in row.Table.Columns)
			{
				if (column.ReadOnly == true)
					continue;

				foreach (string controlType in controlTypes)
				{
					string controlName = controlType + namePrefix + column.ColumnName;

					Control control = Spludlow.WebControls.Find(controlName, page);
					if (control != null)
					{
						string text = null;

						switch (controlType)
						{
							case "TextBox":
								TextBox textBox = (TextBox)control;
								textBox.Text = textBox.Text.Trim();
								text = textBox.Text;
								break;

							case "DropDownList":
								DropDownList dropDownList = (DropDownList)control;
								text = dropDownList.SelectedValue;
								break;

							case "Calendar":
								Calendar calender = (Calendar)control;
								if (calender.SelectedDate != DateTime.MinValue)
									text = calender.SelectedDate.ToString();
								break;

							case "CheckBox":
								CheckBox checkBox = (CheckBox)control;
								text = checkBox.Checked.ToString();
								break;

							default:
								throw new ApplicationException("WebUI, ReadForm; Control type not supported:\t" + controlName);
						}

						if (text != null)
						{
							try
							{
								switch (column.DataType.Name)
								{
									case "String":
										row[column] = text;
										break;

									case "Int32":
										if (text == "")
											text = "0";
										row[column] = Int32.Parse(text);
										break;

									case "DateTime":
										if (text != "")
											row[column] = DateTime.Parse(text);
										break;

									case "Decimal":
										if (text == "")
											text = "0";
										row[column] = Decimal.Parse(text);
										break;

									case "Boolean":
										row[column] = Boolean.Parse(text);
										break;

									default:
										throw new ApplicationException("Data type not supported");
								}
							}
							catch (Exception ee)
							{
								errors.Add(controlName.Substring(controlType.Length) + ": " + ee.Message);
							}
						}

						break;
					}
				}
			}

			return errors.ToArray();
		}

		public static void WriteForm(Page page, DataRow row)
		{
			WriteForm(page, row, "");
		}

		public static void WriteForm(Page page, DataRow row, string namePrefix)
		{
			string[] controlTypes = new string[]
			{
				"TextBox", "DropDownList", "Calendar", "CheckBox", "Literal",
			};

			foreach (DataColumn column in row.Table.Columns)
			{
				if (row.IsNull(column) == true)
					continue;

				foreach (string controlType in controlTypes)
				{
					string controlName = controlType + namePrefix + column.ColumnName;

					Control control = Spludlow.WebControls.Find(controlName, page);
					if (control != null)
					{
						string text = null;

						switch (column.DataType.Name)
						{
							case "String":
								text = (string)row[column];
								break;

							case "Int32":
								text = ((Int32)row[column]).ToString();
								break;

							case "DateTime":
								DateTime date = (DateTime)row[column];
								if (date != DateTime.MinValue)
									text = date.ToString();
								break;

							case "Decimal":
								text = ((Decimal)row[column]).ToString();
								break;

							case "Boolean":
								text = ((Boolean)row[column]).ToString();
								break;

							default:
								throw new ApplicationException("WebUI, WriteForm; Data type not supported");
						}

						if (text != null)
						{
							switch (controlType)
							{
								case "TextBox":
									TextBox textBox = (TextBox)control;
									textBox.Text = text;
									break;

								case "DropDownList":
									DropDownList dropDownList = (DropDownList)control;
									Spludlow.WebControls.SetDropDown(dropDownList, text);
									break;

								case "Calendar":
									Calendar calender = (Calendar)control;
									calender.SelectedDate = DateTime.Parse(text);
									break;

								case "CheckBox":
									CheckBox checkBox = (CheckBox)control;
									checkBox.Checked = Boolean.Parse(text);
									break;

								case "Literal":
									Literal literal = (Literal)control;
									literal.Text = text;
									break;

								default:
									throw new ApplicationException("WebUI, WriteForm; Control type not supported:\t" + controlName);
							}
						}

						break;
					}
				}
			}
		}

		public static int RequestQueryInt32(Page page, string key, bool required)
		{
			string text = RequestQueryString(page, key, required);

			int result = 0;

			if (text != null && Int32.TryParse(text, out result) == false)
				throw new ApplicationException("WebUI, QueryString unable to parse Int32:\t" + key + " : " + text);

			return result;
		}

		public static string RequestQueryString(Page page, string key, bool required)
		{
			string text = page.Request.QueryString[key];

			if (required == true && text == null)
				throw new ApplicationException("WebUI, QueryString not found:\t" + key);

			if (text == null)
				return null;

			return text;
		}

		public static int TrimTextBoxes(Page page)
		{
			int usedCount = 0;

			foreach (Control control in Spludlow.WebControls.Children(page, typeof(TextBox)))
			{
				TextBox textBox = (TextBox)control;
				textBox.Text = textBox.Text.Trim();
				if (textBox.Text.Length > 0)
					++usedCount;
			}

			return usedCount;
		}
	}
}