// Copyright (c) 2006, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
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// Aegisub Project http://www.aegisub.org/

/// @file base_grid.h
/// @see base_grid.cpp
/// @ingroup main_ui
///

#pragma once

#include <libaegisub/signal.h>

#include <map>
#include <memory>
#include <vector>
#include <wx/window.h>

#include "selection_controller.h"

namespace agi {
	struct Context;
	class OptionValue;
}
class AssDialogue;

class BaseGrid final : public wxWindow, public SubtitleSelectionController {
	int lineHeight = 1;     ///< Height of a line in pixels in the current font
	bool holding = false;   ///< Is a drag selection in process?
	wxFont font;            ///< Current grid font
	wxScrollBar *scrollBar; ///< The grid's scrollbar
	bool byFrame = false;   ///< Should times be displayed as frame numbers
	wxBrush rowColors[7];   ///< Cached brushes used for row backgrounds

	/// Row from which the selection shrinks/grows from when selecting via the
	/// keyboard, shift-clicking or dragging
	int extendRow = -1;

	Selection selection; ///< Currently selected lines
	AssDialogue *active_line = nullptr; ///< The currently active line or 0 if none
	std::vector<AssDialogue*> index_line_map;  ///< Row number -> dialogue line
	std::map<AssDialogue*,int> line_index_map; ///< Dialogue line -> row number

	/// Selection batch nesting depth; changes are commited only when this
	/// hits zero
	int batch_level = 0;
	/// Has the active line been changed in the current batch?
	bool batch_active_line_changed = false;
	/// Has the selection been changed in the current batch?
	bool batch_selection_changed = false;

	/// Connection for video seek event. Stored explicitly so that it can be
	/// blocked if the relevant option is disabled
	agi::signal::Connection seek_listener;

	/// Cached grid body context menu
	std::unique_ptr<wxMenu> context_menu;

	void OnContextMenu(wxContextMenuEvent &evt);
	void OnHighlightVisibleChange(agi::OptionValue const& opt);
	void OnKeyDown(wxKeyEvent &event);
	void OnCharHook(wxKeyEvent &event);
	void OnMouseEvent(wxMouseEvent &event);
	void OnPaint(wxPaintEvent &event);
	void OnScroll(wxScrollEvent &event);
	void OnShowColMenu(wxCommandEvent &event);
	void OnSize(wxSizeEvent &event);
	void OnSubtitlesCommit(int type);
	void OnSubtitlesOpen();
	void OnSubtitlesSave();

	void DrawImage(wxDC &dc, bool paint_columns[]);
	void GetRowStrings(int row, AssDialogue *line, bool *paint_columns, wxString *strings, bool replace, wxString const& rep_char) const;

	void ScrollTo(int y);

	int colWidth[13];      ///< Width in pixels of each column

	int time_cols_x; ///< Left edge of the times columns
	int time_cols_w; ///< Width of the two times columns
	int text_col_x; ///< Left edge of the text column
	int text_col_w; ///< Width of the text column

	bool showCol[10]; ///< Column visibility mask

	int yPos = 0;

	void AdjustScrollbar();
	void SetColumnWidths();

	bool IsDisplayed(const AssDialogue *line) const;

	// Re-implement functions from BaseSelectionController to add batching
	void AnnounceActiveLineChanged(AssDialogue *new_line);
	void AnnounceSelectedSetChanged();

protected:
	agi::Context *context; ///< Current project context

public:
	// SelectionController implementation
	void SetActiveLine(AssDialogue *new_line) override;
	AssDialogue * GetActiveLine() const override { return active_line; }
	void SetSelectedSet(Selection new_selection) override;
	void GetSelectedSet(Selection &res) const override { res = selection; }
	Selection const& GetSelectedSet() const override { return selection; }
	void SetSelectionAndActive(Selection new_selection, AssDialogue *new_line) override;;
	void NextLine() override;
	void PrevLine() override;

	void BeginBatch();
	void EndBatch();
	void SetByFrame(bool state);

	void SelectRow(int row, bool addToSelected = false, bool select=true);

	void ClearMaps();
	/// @brief Update the row <-> AssDialogue mappings
	void UpdateMaps();
	void UpdateStyle();

	int GetRows() const { return index_line_map.size(); }
	void MakeRowVisible(int row);

	/// @brief Get dialogue by index
	/// @param n Index to look up
	/// @return Subtitle dialogue line for index, or 0 if invalid index
	AssDialogue *GetDialogue(int n) const;

	/// @brief Get index by dialogue line
	/// @param diag Dialogue line to look up
	/// @return Subtitle index for object, or -1 if unknown subtitle
	int GetDialogueIndex(AssDialogue *diag) const;

	BaseGrid(wxWindow* parent, agi::Context *context, const wxSize& size = wxDefaultSize, long style = wxWANTS_CHARS, const wxString& name = wxPanelNameStr);
	~BaseGrid();

	DECLARE_EVENT_TABLE()
};