/* 
 * Copyright (c) 2009 Craig Sutherland
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using FastForward.Monitor;

namespace FastForward.WinCore
{
    /// <summary>
    /// Manages multiple occurances of windows.
    /// </summary>
    public class WindowManager<TKey, TWindow>
        where TWindow : Form
    {
        #region Private fields
        private Dictionary<TKey, TWindow> windows = new Dictionary<TKey, TWindow>();
        private List<WindowConfig> configuredWindows = new List<WindowConfig>();
        #endregion

        #region Public properties
        #region ConfiguredWindows
        /// <summary>
        /// Gets the configured windows.
        /// </summary>
        public List<WindowConfig> ConfiguredWindows
        {
            get { return configuredWindows; }
        }
        #endregion
        #endregion

        #region Public methods
        #region Show()
        /// <summary>
        /// Shows a window.
        /// </summary>
        /// <param name="key">The key of the window to show.</param>
        public void Show(TKey key)
        {
            var window = windows[key];
            if (window.Visible)
            {
                window.BringToFront();
            }
            else
            {
                window.Show();
            }
        }

        /// <summary>
        /// Shows a window, initialising it if it does not exist.
        /// </summary>
        /// <param name="key">The key of the window to show.</param>
        /// <param name="initialise">The function to initialise the new window.</param>
        /// <param name="name">The name of the window.</param>
        public void Show(TKey key, Func<TKey, TWindow> initialise, string name)
        {
            if (!windows.ContainsKey(key))
            {
                Add(key, initialise(key), name);
            }
            Show(key);
        }
        #endregion

        #region ContainsKey()
        /// <summary>
        /// Checks if the key is already assigned.
        /// </summary>
        /// <param name="key">The key to check.</param>
        /// <returns>True if the key has been assigned, false otherwise.</returns>
        public bool ContainsKey(TKey key)
        {
            return windows.ContainsKey(key);
        }
        #endregion

        #region Add()
        /// <summary>
        /// Adds a new window.
        /// </summary>
        /// <param name="key">The key for the window.</param>
        /// <param name="window">The window to show.</param>
        /// <param name="text">The name of the window.</param>
        public void Add(TKey key, TWindow window, string name)
        {
            // Find the configuration
            var config = (from record in configuredWindows
                          where record.Name == name
                          select record).SingleOrDefault();
            if (config == null)
            {
                // Start a new configuration
                config = new WindowConfig
                {
                    Name = name
                };
                configuredWindows.Add(config);
            }
            else
            {
                // Load the configuration settings
                window.StartPosition = FormStartPosition.Manual;
                if (config.Left != int.MinValue) window.Left = config.Left;
                if (config.Top != int.MinValue) window.Top = config.Top;
                if (config.Width != int.MinValue) window.Width = config.Width;
                if (config.Height != int.MinValue) window.Height = config.Height;
                window.WindowState = config.State;
            }

            // Add the window and add the event handlers
            windows.Add(key, window);
            window.FormClosing += (o, e) =>
            {
                // Store the current settings
                if (window.WindowState == FormWindowState.Normal)
                {
                    config.Left = window.Left;
                    config.Top = window.Top;
                    config.Width = window.Width;
                    config.Height = window.Height;
                }
                config.State = window.WindowState;                
            };
            window.FormClosed += (o, e) =>
            {
                windows.Remove(key);
            };
        }
        #endregion
        #endregion
    }
}