/*************************************************************************/
/*  code_editor.h                                                        */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md).   */
/*                                                                       */
/* 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.                */
/*************************************************************************/

#ifndef CODE_EDITOR_H
#define CODE_EDITOR_H

#include "editor/editor_plugin.h"
#include "scene/gui/check_box.h"
#include "scene/gui/check_button.h"
#include "scene/gui/dialogs.h"
#include "scene/gui/line_edit.h"
#include "scene/gui/text_edit.h"
#include "scene/gui/tool_button.h"
#include "scene/main/timer.h"

class GotoLineDialog : public ConfirmationDialog {

    GDCLASS(GotoLineDialog,ConfirmationDialog)

    Label *line_label;
    LineEdit *line;

    TextEdit *text_editor;

    void ok_pressed() override;

public:
    void popup_find_line(TextEdit *p_edit);
    int get_line() const;

    void set_text_editor(TextEdit *p_text_editor);
    GotoLineDialog();
};

class FindReplaceBar : public HBoxContainer {

    GDCLASS(FindReplaceBar,HBoxContainer)

    LineEdit *search_text;
    Label *matches_label;
    ToolButton *find_prev;
    ToolButton *find_next;
    CheckBox *case_sensitive;
    CheckBox *whole_words;
    TextureButton *hide_button;

    LineEdit *replace_text;
    Button *replace;
    Button *replace_all;
    CheckBox *selection_only;

    VBoxContainer *vbc_lineedit;
    HBoxContainer *hbc_button_replace;
    HBoxContainer *hbc_option_replace;

    TextEdit *text_edit;

    int result_line;
    int result_col;
    int results_count;

    bool replace_all_mode;
    bool preserve_cursor;

    void _get_search_from(int &r_line, int &r_col);
    void _update_results_count();
    void _update_matches_label();

    void _show_search(bool p_focus_replace = false, bool p_show_only = false);
    void _hide_bar();

    void _editor_text_changed();
    void _search_options_changed(bool p_pressed);
    void _search_text_changed(StringView p_text);
    void _search_text_entered(StringView p_text);
    void _replace_text_entered(StringView p_text);
    void _update_size();

protected:
    void _notification(int p_what);
    void _unhandled_input(const Ref<InputEvent> &p_event);

    bool _search(uint32_t p_flags, int p_from_line, int p_from_col);

    void _replace();
    void _replace_all();

    static void _bind_methods();

public:
    UIString get_search_text() const;
    UIString get_replace_text() const;

    bool is_case_sensitive() const;
    bool is_whole_words() const;
    bool is_selection_only() const;
    void set_error(StringView p_label);

    void set_text_edit(TextEdit *p_text_edit);

    void popup_search(bool p_show_only = false);
    void popup_replace();

    bool search_current();
    bool search_prev();
    bool search_next();

    FindReplaceBar();
};

using CodeTextEditorCodeCompleteFunc = void (*)(void *, const String &, Vector<ScriptCodeCompletionOption> *, bool &);

class CodeTextEditor : public VBoxContainer {

    GDCLASS(CodeTextEditor,VBoxContainer)

    TextEdit *text_editor;
    FindReplaceBar *find_replace_bar;
    HBoxContainer *status_bar;

    ToolButton *toggle_scripts_button;
    ToolButton *warning_button;
    Label *warning_count_label;

    Label *line_and_col_txt;

    Label *info;
    Timer *idle;
    Timer *code_complete_timer;

    Timer *font_resize_timer;
    int font_resize_val;
    real_t font_size;

    Label *error;
    int error_line;
    int error_column;

    void _on_settings_change();

    void _update_font();
    void _complete_request();
    Ref<Texture> _get_completion_icon(const ScriptCodeCompletionOption &p_option);
    void _font_resize_timeout();
    bool _add_font_size(int p_delta);

    void _input(const Ref<InputEvent> &event);
    void _text_editor_gui_input(const Ref<InputEvent> &p_event);
    void _zoom_in();
    void _zoom_out();
    void _zoom_changed();
    void _reset_zoom();

    CodeTextEditorCodeCompleteFunc code_complete_func;
    void *code_complete_ud;

    void _warning_label_gui_input(const Ref<InputEvent> &p_event);
    void _warning_button_pressed();
    void _set_show_warnings_panel(bool p_show);
    void _error_pressed(const Ref<InputEvent> &p_event);

    void _delete_line(int p_line);
    void _toggle_scripts_pressed();

protected:
    virtual void _load_theme_settings() {}
    virtual void _validate_script() {}
    virtual void _code_complete_script(const String &p_code, Vector<ScriptCodeCompletionOption> *r_options) {}

    void _text_changed_idle_timeout();
    void _code_complete_timer_timeout();
    void _text_changed();
    void _line_col_changed();
    void _notification(int);
    static void _bind_methods();

    bool is_warnings_panel_opened;

public:
    void trim_trailing_whitespace();
    void insert_final_newline();

    void convert_indent_to_spaces();
    void convert_indent_to_tabs();

    enum CaseStyle {
        UPPER,
        LOWER,
        CAPITALIZE,
    };
    void convert_case(CaseStyle p_case);

    void move_lines_up();
    void move_lines_down();
    void delete_lines();
    void clone_lines_down();

    /// Toggle inline comment on currently selected lines, or on current line if nothing is selected,
    /// by adding or removing comment delimiter
    void toggle_inline_comment(StringView delimiter);

    void goto_line(int p_line);
    void goto_line_selection(int p_line, int p_begin, int p_end);
    void goto_line_centered(int p_line);
    void set_executing_line(int p_line);
    void clear_executing_line();

    Variant get_edit_state();
    void set_edit_state(const Variant &p_state);

    void set_warning_nb(int p_warning_nb);

    void update_editor_settings();
    void set_error(const StringName &p_error);
    void set_error_pos(int p_line, int p_column);
    void update_line_and_column() { _line_col_changed(); }
    TextEdit *get_text_edit() { return text_editor; }
    FindReplaceBar *get_find_replace_bar() { return find_replace_bar; }
    virtual void apply_code() {}
    void goto_error();

    void toggle_bookmark();
    void goto_next_bookmark();
    void goto_prev_bookmark();
    void remove_all_bookmarks();

    void set_code_complete_func(CodeTextEditorCodeCompleteFunc p_code_complete_func, void *p_ud);

    void validate_script();

    void show_toggle_scripts_button();
    void update_toggle_scripts_button();

    CodeTextEditor();
};

#endif // CODE_EDITOR_H
