/************************************************************************************
 *
 * D++, A Lightweight C++ library for Discord
 *
 * Copyright 2021 Craig Edwards and D++ contributors 
 * (https://github.com/brainboxdotcc/DPP/graphs/contributors)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ************************************************************************************/
#include <dpp/emoji.h>
#include <dpp/discordevents.h>
#include <dpp/nlohmann/json.hpp>
#include <dpp/exception.h>

namespace dpp {

using json = nlohmann::json;

emoji::emoji() : managed(), user_id(0), flags(0), image_data(nullptr)
{
}

emoji::emoji(const std::string n, const snowflake i, const uint8_t f) : managed(i), name(n), user_id(0), flags(f), image_data(nullptr)
{	
}

emoji::~emoji() {
    delete image_data;
}

emoji& emoji::fill_from_json(nlohmann::json* j) {
	id = snowflake_not_null(j, "id");
	name = string_not_null(j, "name");
	if (j->contains("user")) {
		json & user = (*j)["user"];
		user_id = snowflake_not_null(&user, "id");
	}
	if (bool_not_null(j, "require_colons"))
		flags |= e_require_colons;
	if (bool_not_null(j, "managed"))
		flags |= e_managed;
	if (bool_not_null(j, "animated"))
		flags |= e_animated;
	if (bool_not_null(j, "available"))
		flags |= e_available;
	return *this;
}

std::string emoji::build_json(bool with_id) const {
	json j;
	if (with_id) {
		j["id"] = std::to_string(id);
	}
	j["name"] = name;
	if (image_data) {
		j["image"] = *image_data;
	}
	return j.dump();
}

bool emoji::requires_colons() const {
	return flags & e_require_colons;
}

bool emoji::is_managed() const {
	return flags & e_managed;
}

bool emoji::is_animated() const {
	return flags & e_animated;
}

bool emoji::is_available() const {
	return flags & e_available;
}

emoji& emoji::load_image(const std::string &image_blob, const image_type type) {
	static const std::map<image_type, std::string> mimetypes = {
		{ i_gif, "image/gif" },
		{ i_jpg, "image/jpeg" },
		{ i_png, "image/png" }
	};
	if (image_blob.size() > MAX_EMOJI_SIZE) {
		throw dpp::length_exception("Emoji file exceeds discord limit of 256 kilobytes");
	}

	/* If there's already image data defined, free the old data, to prevent a memory leak */
	delete image_data;

	image_data = new std::string("data:" + mimetypes.find(type)->second + ";base64," + base64_encode((unsigned char const*)image_blob.data(), (unsigned int)image_blob.length()));

	return *this;
}

std::string emoji::format() const
{
	return id ? ((is_animated() ? "a:" : "") + name + ":" + std::to_string(id)) : name;
}

std::string emoji::get_mention() const {
	if (id) {
		if (is_animated()) {
			return "<" + format() + ">";
		} else {
			return "<:" + format() + ">";
		}
	} else {
		return ":" + format() + ":";
	}
}


};