/*
    Copyright (C) 2014-2019 de4dot@gmail.com

    This file is part of dnSpy

    dnSpy is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    dnSpy is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with dnSpy.  If not, see <http://www.gnu.org/licenses/>.
*/

using System;
using System.Collections.Generic;
using dnSpy.Contracts.Command;
using dnSpy.Contracts.Controls;
using dnSpy.Contracts.Text.Operations;

namespace dnSpy.Contracts.Text.Editor {
	/// <summary>
	/// A REPL (Read, Eval, Print, Loop) editor
	/// </summary>
	interface IReplEditor : ICommandTargetCollectionProvider, IUIObjectProvider2, IDisposable {
		/// <summary>
		/// true if <see cref="ClearScreen"/> can be called
		/// </summary>
		bool CanClearScreen { get; }

		/// <summary>
		/// Clears the screen
		/// </summary>
		void ClearScreen();

		/// <summary>
		/// true if <see cref="SaveText(string, string, string)"/> can be called
		/// </summary>
		bool CanSaveText { get; }

		/// <summary>
		/// Saves the text
		/// </summary>
		/// <param name="filenameNoExtension">Suggested filename without the file extension</param>
		/// <param name="fileExtension">File extension</param>
		/// <param name="filesFilter">File filter passed to <c>SaveFileDialog</c></param>
		void SaveText(string filenameNoExtension, string fileExtension, string filesFilter);

		/// <summary>
		/// true if <see cref="SaveCode(string, string, string)"/> can be called
		/// </summary>
		bool CanSaveCode { get; }

		/// <summary>
		/// Saves the code
		/// </summary>
		/// <param name="filenameNoExtension">Suggested filename without the file extension</param>
		/// <param name="fileExtension">File extension</param>
		/// <param name="filesFilter">File filter passed to <c>SaveFileDialog</c></param>
		void SaveCode(string filenameNoExtension, string fileExtension, string filesFilter);

		/// <summary>
		/// true if <see cref="CopyCode"/> can be called
		/// </summary>
		bool CanCopyCode { get; }

		/// <summary>
		/// Copies the selected code
		/// </summary>
		void CopyCode();

		/// <summary>
		/// true if <see cref="SelectPreviousCommand"/> can be called
		/// </summary>
		bool CanSelectPreviousCommand { get; }

		/// <summary>
		/// Selects the previous command
		/// </summary>
		void SelectPreviousCommand();

		/// <summary>
		/// true if <see cref="SelectNextCommand"/> can be called
		/// </summary>
		bool CanSelectNextCommand { get; }

		/// <summary>
		/// Selects the next command
		/// </summary>
		void SelectNextCommand();

		/// <summary>
		/// Gets all selected code
		/// </summary>
		/// <returns></returns>
		string GetCode();

		/// <summary>
		/// Adds script output. This method can be called from any thread
		/// </summary>
		/// <param name="text">Text</param>
		/// <param name="color">Color</param>
		/// <param name="startOnNewLine">true to print the text on a new line</param>
		void OutputPrint(string? text, object color, bool startOnNewLine = false);

		/// <summary>
		/// Adds script output. This method can be called from any thread
		/// </summary>
		/// <param name="text">Text</param>
		/// <param name="color">Color</param>
		/// <param name="startOnNewLine">true to print the text on a new line</param>
		void OutputPrint(string? text, TextColor color, bool startOnNewLine = false);

		/// <summary>
		/// Adds script output and a new line. This method can be called from any thread
		/// </summary>
		/// <param name="text">Text</param>
		/// <param name="color">Color</param>
		/// <param name="startOnNewLine">true to print the text on a new line</param>
		void OutputPrintLine(string? text, object color, bool startOnNewLine = false);

		/// <summary>
		/// Adds script output and a new line. This method can be called from any thread
		/// </summary>
		/// <param name="text">Text</param>
		/// <param name="color">Color</param>
		/// <param name="startOnNewLine">true to print the text on a new line</param>
		void OutputPrintLine(string? text, TextColor color, bool startOnNewLine = false);

		/// <summary>
		/// Adds script output. This method can be called from any thread
		/// </summary>
		/// <param name="text">Text</param>
		void OutputPrint(IEnumerable<ColorAndText> text);

		/// <summary>
		/// Gets notified by this instance
		/// </summary>
		IReplCommandHandler CommandHandler { get; set; }

		/// <summary>
		/// Called by <see cref="CommandHandler"/> after the command has finished executing
		/// </summary>
		void OnCommandExecuted();

		/// <summary>
		/// Resets the state to original executing state, but doesn't reset history or clears the screen
		/// </summary>
		void Reset();

		/// <summary>
		/// Gets the REPL editor operations
		/// </summary>
		IReplEditorOperations ReplEditorOperations { get; }

		/// <summary>
		/// Gets the text view
		/// </summary>
		IDsWpfTextView TextView { get; }

		/// <summary>
		/// Gets the text view host
		/// </summary>
		IDsWpfTextViewHost TextViewHost { get; }
	}
}