/*************************************************************************/
/*  javascript_tools_editor_plugin.cpp                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/* 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:                                             */
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/* 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,       */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/

#if defined(TOOLS_ENABLED) && defined(JAVASCRIPT_ENABLED)
#include "javascript_tools_editor_plugin.h"

#include "core/engine.h"
#include "core/os/dir_access.h"
#include "core/os/file_access.h"
#include "core/project_settings.h"
#include "editor/editor_node.h"

#include <emscripten/emscripten.h>

static void _javascript_editor_init_callback() {
	EditorNode::get_singleton()->add_editor_plugin(memnew(JavaScriptToolsEditorPlugin(EditorNode::get_singleton())));
}

void JavaScriptToolsEditorPlugin::initialize() {
	EditorNode::add_init_callback(_javascript_editor_init_callback);
}

JavaScriptToolsEditorPlugin::JavaScriptToolsEditorPlugin(EditorNode *p_editor) {
	Variant v;
	add_tool_menu_item("Download Project Source", this, "_download_zip", v);
}

void JavaScriptToolsEditorPlugin::_download_zip(Variant p_v) {
	if (!Engine::get_singleton() || !Engine::get_singleton()->is_editor_hint()) {
		WARN_PRINT("Project download is only available in Editor mode");
		return;
	}
	String resource_path = ProjectSettings::get_singleton()->get_resource_path();

	FileAccess *src_f;
	zlib_filefunc_def io = zipio_create_io_from_file(&src_f);
	zipFile zip = zipOpen2("/tmp/project.zip", APPEND_STATUS_CREATE, NULL, &io);
	String base_path = resource_path.substr(0, resource_path.rfind("/")) + "/";
	_zip_recursive(resource_path, base_path, zip);
	zipClose(zip, NULL);
	EM_ASM({
		const path = "/tmp/project.zip";
		const size = FS.stat(path)["size"];
		const buf = new Uint8Array(size);
		const fd = FS.open(path, "r");
		FS.read(fd, buf, 0, size);
		FS.close(fd);
		FS.unlink(path);
		const blob = new Blob([buf], { type: "application/zip" });
		const url = window.URL.createObjectURL(blob);
		const a = document.createElement("a");
		a.href = url;
		a.download = "project.zip";
		a.style.display = "none";
		document.body.appendChild(a);
		a.click();
		a.remove();
		window.URL.revokeObjectURL(url);
	});
}

void JavaScriptToolsEditorPlugin::_bind_methods() {
	ClassDB::bind_method("_download_zip", &JavaScriptToolsEditorPlugin::_download_zip);
}

void JavaScriptToolsEditorPlugin::_zip_file(String p_path, String p_base_path, zipFile p_zip) {
	FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
	if (!f) {
		WARN_PRINT("Unable to open file for zipping: " + p_path);
		return;
	}
	Vector<uint8_t> data;
	int len = f->get_len();
	data.resize(len);
	f->get_buffer(data.ptrw(), len);
	f->close();
	memdelete(f);

	String path = p_path.replace_first(p_base_path, "");
	zipOpenNewFileInZip(p_zip,
			path.utf8().get_data(),
			NULL,
			NULL,
			0,
			NULL,
			0,
			NULL,
			Z_DEFLATED,
			Z_DEFAULT_COMPRESSION);
	zipWriteInFileInZip(p_zip, data.ptr(), data.size());
	zipCloseFileInZip(p_zip);
}

void JavaScriptToolsEditorPlugin::_zip_recursive(String p_path, String p_base_path, zipFile p_zip) {
	DirAccess *dir = DirAccess::open(p_path);
	if (!dir) {
		WARN_PRINT("Unable to open dir for zipping: " + p_path);
		return;
	}
	dir->list_dir_begin();
	String cur = dir->get_next();
	while (!cur.empty()) {
		String cs = p_path.plus_file(cur);
		if (cur == "." || cur == ".." || cur == ".import") {
			// Skip
		} else if (dir->current_is_dir()) {
			String path = cs.replace_first(p_base_path, "") + "/";
			zipOpenNewFileInZip(p_zip,
					path.utf8().get_data(),
					NULL,
					NULL,
					0,
					NULL,
					0,
					NULL,
					Z_DEFLATED,
					Z_DEFAULT_COMPRESSION);
			zipCloseFileInZip(p_zip);
			_zip_recursive(cs, p_base_path, p_zip);
		} else {
			_zip_file(cs, p_base_path, p_zip);
		}
		cur = dir->get_next();
	}
}
#endif