using FastReport.Forms;
using FastReport.Utils;
using System.Windows.Forms;

namespace FastReport.Design.PageDesigners
{
    internal class PageDesignerBase : Panel, IDesignerPlugin
    {
        #region Properties

        public PageBase Page { get; set; }

        public Designer Designer { get; }

        public bool Locked { get; private set; }

        public bool IsInsertingObject { get; set; }

        public virtual Report Report => Page.Report;

        public string PluginName => Name;

        public virtual float Zoom
        {
            get { return 1; }
            set { }
        }


        private ControlStorageService storage;

        /// <summary>
        /// Gets storage service.
        /// </summary>
        public ControlStorageService Storage
        {
            get
            {
                if (storage == null)
                {
                    // pass Designer as a control to get dpi from it (case: Avalonia can't get dpi correctly after disposing the control)
                    storage = new ControlStorageService(Designer, "Designer," + Name);
                }
                return storage;
            }
        }

        #endregion

        #region Public Methods
        // this method is called when the page becomes active. You may, for example, modify the main menu
        // in this method.
        public virtual void PageActivated()
        {
        }

        // this method is called when the page becomes inactive. You should remove items added to the main menu
        // in this method.
        public virtual void PageDeactivated()
        {
        }

        public virtual void FillObjects(bool resetSelection)
        {
            Designer.Objects.Clear();
            Designer.Objects.Add(Page.Report);
            Designer.Objects.Add(Page);
            foreach (Base b in Page.AllObjects)
            {
                Designer.Objects.Add(b);
            }

            if (resetSelection)
            {
                Designer.SelectedObjects.Clear();
                Designer.SelectedObjects.Add(Page);
            }
        }

        public virtual bool CanCopy()
        {
            if (Designer.SelectedObjects.Count > 0)
            {
                // if at least one object can be copied, allow the operation
                foreach (Base c in Designer.SelectedObjects)
                {
                    if (c.HasFlag(Flags.CanCopy))
                        return true;
                }
            }
            return false;
        }

        public virtual void Copy()
        {
            Designer.Clipboard.Copy();
        }

        public virtual void Cut()
        {
            Designer.Clipboard.Cut();
        }

        public virtual bool CanPaste() => Designer.Clipboard.CanPaste;

        public virtual void Paste()
        {
            Designer.Clipboard.Paste();
        }

        public virtual bool CanUndo() => false;

        public virtual void Undo()
        {
        }

        public virtual bool CanRedo() => false;

        public virtual void Redo()
        {
        }

        public virtual void Paste(ObjectCollection list, InsertFrom source)
        {
        }

        public virtual void CancelPaste()
        {
        }

        public virtual void ResetModified()
        {
        }

        public virtual void SelectAll()
        {
        }

        public virtual void ZoomPageWidth()
        {
        }

        public virtual void ZoomWholePage()
        {
        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
            if (disposing)
                SaveState();
        }
        #endregion

        #region IDesignerPlugin

        public virtual void Localize()
        {
        }

        public virtual void SaveState()
        {
        }

        public virtual void RestoreState()
        {
        }

        public virtual void SelectionChanged()
        {
        }

        public virtual void UpdateContent()
        {
        }

        public virtual void Lock()
        {
            Locked = true;
        }

        public virtual void Unlock()
        {
            Locked = false;
            UpdateContent();
        }

        public virtual DesignerOptionsPage GetOptionsPage()
        {
            return null;
        }

        public virtual void UpdateUIStyle()
        {
        }

        public virtual void UpdateDpiDependencies()
        {
        }

        #endregion

        public PageDesignerBase(Designer designer) : base()
        {
            Designer = designer;
            IsInsertingObject = false;
        }
    }
}