/**************************************************************************/
/*  csharp_script_resource_format.cpp                                     */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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/* a copy of this software and associated documentation files (the        */
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/* distribute, sublicense, and/or sell copies of the Software, and to     */
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/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
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#include "csharp_script_resource_format.h"

#include "mono_gd/gd_mono_cache.h"

#include "core/io/file_access.h"

#ifdef TOOLS_ENABLED
static bool _create_project_solution_if_needed() {
	CRASH_COND(CSharpLanguage::get_singleton()->get_godotsharp_editor() == nullptr);
	return CSharpLanguage::get_singleton()->get_godotsharp_editor()->call("CreateProjectSolutionIfNeeded");
}
#endif

Ref<Resource> ResourceFormatLoaderCSharpScript::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
	if (r_error) {
		*r_error = ERR_FILE_CANT_OPEN;
	}

	// TODO ignore anything inside bin/ and obj/ in tools builds?

	String real_path = p_path;
	if (p_path.begins_with("csharp://")) {
		// This is a virtual path used by generic types, extract the real path.
		real_path = "res://" + p_path.trim_prefix("csharp://");
		real_path = real_path.substr(0, real_path.rfind_char(':'));
	}

	Ref<CSharpScript> scr;

	if (GDMonoCache::godot_api_cache_updated) {
		GDMonoCache::managed_callbacks.ScriptManagerBridge_GetOrCreateScriptBridgeForPath(&p_path, &scr);
		ERR_FAIL_COND_V_MSG(scr.is_null(), Ref<Resource>(), "Could not create C# script '" + real_path + "'.");
	} else {
		scr.instantiate();
	}

#ifdef DEBUG_ENABLED
	Error err = scr->load_source_code(real_path);
	ERR_FAIL_COND_V_MSG(err != OK, Ref<Resource>(), "Cannot load C# script file '" + real_path + "'.");
#endif // DEBUG_ENABLED

	// Only one instance of a C# script is allowed to exist.
	ERR_FAIL_COND_V_MSG(!scr->get_path().is_empty() && scr->get_path() != p_original_path, Ref<Resource>(),
			"The C# script path is different from the path it was registered in the C# dictionary.");

	Ref<Resource> existing = ResourceCache::get_ref(p_path);
	switch (p_cache_mode) {
		case ResourceFormatLoader::CACHE_MODE_IGNORE:
		case ResourceFormatLoader::CACHE_MODE_IGNORE_DEEP:
			break;
		case ResourceFormatLoader::CACHE_MODE_REUSE:
			if (existing.is_null()) {
				scr->set_path(p_original_path);
			} else {
				scr = existing;
			}
			break;
		case ResourceFormatLoader::CACHE_MODE_REPLACE:
		case ResourceFormatLoader::CACHE_MODE_REPLACE_DEEP:
			scr->set_path(p_original_path, true);
			break;
	}

	scr->reload();

	if (r_error) {
		*r_error = OK;
	}

	return scr;
}

void ResourceFormatLoaderCSharpScript::get_recognized_extensions(List<String> *p_extensions) const {
	p_extensions->push_back("cs");
}

bool ResourceFormatLoaderCSharpScript::handles_type(const String &p_type) const {
	return p_type == "Script" || p_type == CSharpLanguage::get_singleton()->get_type();
}

String ResourceFormatLoaderCSharpScript::get_resource_type(const String &p_path) const {
	return p_path.has_extension("cs") ? CSharpLanguage::get_singleton()->get_type() : "";
}

Error ResourceFormatSaverCSharpScript::save(const Ref<Resource> &p_resource, const String &p_path, uint32_t p_flags) {
	Ref<CSharpScript> sqscr = p_resource;
	ERR_FAIL_COND_V(sqscr.is_null(), ERR_INVALID_PARAMETER);

	String source = sqscr->get_source_code();

#ifdef TOOLS_ENABLED
	if (!FileAccess::exists(p_path)) {
		// The file does not yet exist, let's assume the user just created this script. In such
		// cases we need to check whether the solution and csproj were already created or not.
		if (!_create_project_solution_if_needed()) {
			ERR_PRINT("C# project could not be created; cannot add file: '" + p_path + "'.");
		}
	}
#endif

	{
		Error err;
		Ref<FileAccess> file = FileAccess::open(p_path, FileAccess::WRITE, &err);
		ERR_FAIL_COND_V_MSG(err != OK, err, "Cannot save C# script file '" + p_path + "'.");

		file->store_string(source);

		if (file->get_error() != OK && file->get_error() != ERR_FILE_EOF) {
			return ERR_CANT_CREATE;
		}
	}

#ifdef TOOLS_ENABLED
	if (ScriptServer::is_reload_scripts_on_save_enabled()) {
		CSharpLanguage::get_singleton()->reload_tool_script(p_resource, false);
	}
#endif

	return OK;
}

void ResourceFormatSaverCSharpScript::get_recognized_extensions(const Ref<Resource> &p_resource, List<String> *p_extensions) const {
	if (Object::cast_to<CSharpScript>(p_resource.ptr())) {
		p_extensions->push_back("cs");
	}
}

bool ResourceFormatSaverCSharpScript::recognize(const Ref<Resource> &p_resource) const {
	return Object::cast_to<CSharpScript>(p_resource.ptr()) != nullptr;
}