/**************************************************************************/
/*  editor_native_shader_source_visualizer.cpp                            */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* 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.                 */
/**************************************************************************/

#include "editor_native_shader_source_visualizer.h"

#include "core/object/class_db.h"
#include "editor/editor_string_names.h"
#include "editor/settings/editor_settings.h"
#include "editor/themes/editor_scale.h"
#include "scene/gui/code_edit.h"
#include "scene/gui/tab_container.h"
#include "scene/resources/syntax_highlighter.h"
#include "servers/rendering/rendering_server.h"
#include "servers/rendering/shader_language.h"

void EditorNativeShaderSourceVisualizer::_load_theme_settings() {
	syntax_highlighter->set_number_color(EDITOR_GET("text_editor/theme/highlighting/number_color"));
	syntax_highlighter->set_symbol_color(EDITOR_GET("text_editor/theme/highlighting/symbol_color"));
	syntax_highlighter->set_function_color(EDITOR_GET("text_editor/theme/highlighting/function_color"));
	syntax_highlighter->set_member_variable_color(EDITOR_GET("text_editor/theme/highlighting/member_variable_color"));

	syntax_highlighter->clear_keyword_colors();

	List<String> keywords;
	ShaderLanguage::get_keyword_list(&keywords);
	const Color keyword_color = EDITOR_GET("text_editor/theme/highlighting/keyword_color");
	const Color control_flow_keyword_color = EDITOR_GET("text_editor/theme/highlighting/control_flow_keyword_color");

	for (const String &keyword : keywords) {
		if (ShaderLanguage::is_control_flow_keyword(keyword)) {
			syntax_highlighter->add_keyword_color(keyword, control_flow_keyword_color);
		} else {
			syntax_highlighter->add_keyword_color(keyword, keyword_color);
		}
	}

	// Colorize comments.
	const Color comment_color = EDITOR_GET("text_editor/theme/highlighting/comment_color");
	syntax_highlighter->clear_color_regions();
	syntax_highlighter->add_color_region("/*", "*/", comment_color, false);
	syntax_highlighter->add_color_region("//", "", comment_color, true);

	// Colorize preprocessor statements.
	const Color user_type_color = EDITOR_GET("text_editor/theme/highlighting/user_type_color");
	syntax_highlighter->add_color_region("#", "", user_type_color, true);

	syntax_highlighter->set_uint_suffix_enabled(true);
}

void EditorNativeShaderSourceVisualizer::_inspect_shader(RID p_shader) {
	if (versions) {
		memdelete(versions);
		versions = nullptr;
	}

	RenderingServerTypes::ShaderNativeSourceCode nsc = RS::get_singleton()->shader_get_native_source_code(p_shader);

	_load_theme_settings();

	versions = memnew(TabContainer);
	versions->set_theme_type_variation("TabContainerInner");
	versions->set_tab_alignment(TabBar::ALIGNMENT_CENTER);
	versions->set_v_size_flags(Control::SIZE_EXPAND_FILL);
	versions->set_h_size_flags(Control::SIZE_EXPAND_FILL);
	for (int i = 0; i < nsc.versions.size(); i++) {
		TabContainer *vtab = memnew(TabContainer);
		vtab->set_theme_type_variation("TabContainerInner");
		vtab->set_name("Version " + itos(i));
		vtab->set_tab_alignment(TabBar::ALIGNMENT_CENTER);
		vtab->set_v_size_flags(Control::SIZE_EXPAND_FILL);
		vtab->set_h_size_flags(Control::SIZE_EXPAND_FILL);
		versions->add_child(vtab);
		for (int j = 0; j < nsc.versions[i].stages.size(); j++) {
			CodeEdit *code_edit = memnew(CodeEdit);
			code_edit->set_editable(false);
			code_edit->set_syntax_highlighter(syntax_highlighter);
			code_edit->add_theme_font_override(SceneStringName(font), get_theme_font("source", EditorStringName(EditorFonts)));
			code_edit->add_theme_font_size_override(SceneStringName(font_size), get_theme_font_size("source_size", EditorStringName(EditorFonts)));
			code_edit->add_theme_constant_override("line_spacing", EDITOR_GET("text_editor/appearance/whitespace/line_spacing"));

			// Appearance: Caret
			code_edit->set_caret_type((TextEdit::CaretType)EDITOR_GET("text_editor/appearance/caret/type").operator int());
			code_edit->set_caret_blink_enabled(EDITOR_GET("text_editor/appearance/caret/caret_blink"));
			code_edit->set_caret_blink_interval(EDITOR_GET("text_editor/appearance/caret/caret_blink_interval"));
			code_edit->set_highlight_current_line(EDITOR_GET("text_editor/appearance/caret/highlight_current_line"));
			code_edit->set_highlight_all_occurrences(EDITOR_GET("text_editor/appearance/caret/highlight_all_occurrences"));

			// Appearance: Gutters
			code_edit->set_draw_line_numbers(EDITOR_GET("text_editor/appearance/gutters/show_line_numbers"));
			code_edit->set_line_numbers_zero_padded(EDITOR_GET("text_editor/appearance/gutters/line_numbers_zero_padded"));

			// Appearance: Minimap
			code_edit->set_draw_minimap(EDITOR_GET("text_editor/appearance/minimap/show_minimap"));
			code_edit->set_minimap_width((int)EDITOR_GET("text_editor/appearance/minimap/minimap_width") * EDSCALE);

			// Appearance: Lines
			code_edit->set_line_folding_enabled(EDITOR_GET("text_editor/appearance/lines/code_folding"));
			code_edit->set_draw_fold_gutter(EDITOR_GET("text_editor/appearance/lines/code_folding"));
			code_edit->set_line_wrapping_mode((TextEdit::LineWrappingMode)EDITOR_GET("text_editor/appearance/lines/word_wrap").operator int());
			code_edit->set_autowrap_mode((TextServer::AutowrapMode)EDITOR_GET("text_editor/appearance/lines/autowrap_mode").operator int());

			// Appearance: Whitespace
			code_edit->set_draw_tabs(EDITOR_GET("text_editor/appearance/whitespace/draw_tabs"));
			code_edit->set_draw_spaces(EDITOR_GET("text_editor/appearance/whitespace/draw_spaces"));
			code_edit->add_theme_constant_override("line_spacing", EDITOR_GET("text_editor/appearance/whitespace/line_spacing"));

			// Behavior: Navigation
			code_edit->set_scroll_past_end_of_file_enabled(EDITOR_GET("text_editor/behavior/navigation/scroll_past_end_of_file"));
			code_edit->set_smooth_scroll_enabled(EDITOR_GET("text_editor/behavior/navigation/smooth_scrolling"));
			code_edit->set_v_scroll_speed(EDITOR_GET("text_editor/behavior/navigation/v_scroll_speed"));
			code_edit->set_drag_and_drop_selection_enabled(EDITOR_GET("text_editor/behavior/navigation/drag_and_drop_selection"));

			// Behavior: Indent
			code_edit->set_indent_size(EDITOR_GET("text_editor/behavior/indent/size"));
			code_edit->set_auto_indent_enabled(EDITOR_GET("text_editor/behavior/indent/auto_indent"));
			code_edit->set_indent_wrapped_lines(EDITOR_GET("text_editor/behavior/indent/indent_wrapped_lines"));

			code_edit->set_name(nsc.versions[i].stages[j].name);
			code_edit->set_text(nsc.versions[i].stages[j].code);
			code_edit->set_v_size_flags(Control::SIZE_EXPAND_FILL);
			code_edit->set_h_size_flags(Control::SIZE_EXPAND_FILL);
			vtab->add_child(code_edit);
		}
	}
	add_child(versions);
	popup_centered_ratio();
}

void EditorNativeShaderSourceVisualizer::_bind_methods() {
	ClassDB::bind_method("_inspect_shader", &EditorNativeShaderSourceVisualizer::_inspect_shader);
}

EditorNativeShaderSourceVisualizer::EditorNativeShaderSourceVisualizer() {
	syntax_highlighter.instantiate();

	add_to_group("_native_shader_source_visualizer");
	set_title(TTR("Native Shader Source Inspector"));
}
