/*************************************************************************/
/*  find_in_files.h                                                      */
/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#ifndef FIND_IN_FILES_H
#define FIND_IN_FILES_H

#include "core/templates/hash_map.h"
#include "scene/gui/dialogs.h"

// Performs the actual search
class FindInFiles : public Node {
	GDCLASS(FindInFiles, Node);

public:
	static const char *SIGNAL_RESULT_FOUND;
	static const char *SIGNAL_FINISHED;

	void set_search_text(String p_pattern);
	void set_whole_words(bool p_whole_word);
	void set_match_case(bool p_match_case);
	void set_folder(String folder);
	void set_filter(const Set<String> &exts);

	String get_search_text() const { return _pattern; }

	bool is_whole_words() const { return _whole_words; }
	bool is_match_case() const { return _match_case; }

	void start();
	void stop();

	bool is_searching() const { return _searching; }
	float get_progress() const;

protected:
	void _notification(int p_what);

	static void _bind_methods();

private:
	void _process();
	void _iterate();
	void _scan_dir(String path, PackedStringArray &out_folders);
	void _scan_file(String fpath);

	// Config
	String _pattern;
	Set<String> _extension_filter;
	String _root_dir;
	bool _whole_words = true;
	bool _match_case = true;

	// State
	bool _searching = false;
	String _current_dir;
	Vector<PackedStringArray> _folders_stack;
	Vector<String> _files_to_scan;
	int _initial_files_count = 0;
};

class LineEdit;
class CheckBox;
class FileDialog;
class HBoxContainer;

// Prompts search parameters
class FindInFilesDialog : public AcceptDialog {
	GDCLASS(FindInFilesDialog, AcceptDialog);

public:
	enum FindInFilesMode {
		SEARCH_MODE,
		REPLACE_MODE
	};

	static const char *SIGNAL_FIND_REQUESTED;
	static const char *SIGNAL_REPLACE_REQUESTED;

	FindInFilesDialog();

	void set_search_text(String text);
	void set_replace_text(String text);

	void set_find_in_files_mode(FindInFilesMode p_mode);

	String get_search_text() const;
	String get_replace_text() const;
	bool is_match_case() const;
	bool is_whole_words() const;
	String get_folder() const;
	Set<String> get_filter() const;

protected:
	void _notification(int p_what);

	void _visibility_changed();
	void custom_action(const String &p_action) override;
	static void _bind_methods();

private:
	void _on_folder_button_pressed();
	void _on_folder_selected(String path);
	void _on_search_text_modified(String text);
	void _on_search_text_submitted(String text);
	void _on_replace_text_submitted(String text);

	FindInFilesMode _mode;
	LineEdit *_search_text_line_edit = nullptr;

	Label *_replace_label = nullptr;
	LineEdit *_replace_text_line_edit = nullptr;

	LineEdit *_folder_line_edit = nullptr;
	CheckBox *_match_case_checkbox = nullptr;
	CheckBox *_whole_words_checkbox = nullptr;
	Button *_find_button = nullptr;
	Button *_replace_button = nullptr;
	FileDialog *_folder_dialog = nullptr;
	HBoxContainer *_filters_container = nullptr;
	HashMap<String, bool> _filters_preferences;
};

class Button;
class Tree;
class TreeItem;
class ProgressBar;

// Display search results
class FindInFilesPanel : public Control {
	GDCLASS(FindInFilesPanel, Control);

public:
	static const char *SIGNAL_RESULT_SELECTED;
	static const char *SIGNAL_FILES_MODIFIED;

	FindInFilesPanel();

	FindInFiles *get_finder() const { return _finder; }

	void set_with_replace(bool with_replace);
	void set_replace_text(String text);

	void start_search();
	void stop_search();

protected:
	static void _bind_methods();

	void _notification(int p_what);

private:
	void _on_result_found(String fpath, int line_number, int begin, int end, String text);
	void _on_finished();
	void _on_refresh_button_clicked();
	void _on_cancel_button_clicked();
	void _on_result_selected();
	void _on_item_edited();
	void _on_replace_text_changed(String text);
	void _on_replace_all_clicked();

	struct Result {
		int line_number = 0;
		int begin = 0;
		int end = 0;
		int begin_trimmed = 0;
	};

	void apply_replaces_in_file(String fpath, const Vector<Result> &locations, String new_text);
	void update_replace_buttons();
	String get_replace_text();

	void draw_result_text(Object *item_obj, Rect2 rect);

	void set_progress_visible(bool visible);
	void clear();

	FindInFiles *_finder = nullptr;
	Label *_search_text_label = nullptr;
	Tree *_results_display = nullptr;
	Label *_status_label = nullptr;
	Button *_refresh_button = nullptr;
	Button *_cancel_button = nullptr;
	ProgressBar *_progress_bar = nullptr;
	Map<String, TreeItem *> _file_items;
	Map<TreeItem *, Result> _result_items;
	bool _with_replace = false;

	HBoxContainer *_replace_container = nullptr;
	LineEdit *_replace_line_edit = nullptr;
	Button *_replace_all_button = nullptr;
};

#endif // FIND_IN_FILES_H