#pragma once

#include <nlohmann/json.hpp>
#include <string>
#include <vector>
#include <thread>

class Pokedex;

/** @brief single pokemon card */
class PokemonCard {
private:
	/** @brief raw API card data */
	nlohmann::json raw_data;

	/** @brief load card data from json data (see named constructor) */
	virtual void raw_load_json(nlohmann::json raw_data);
	/** @brief load card data from cache (see named constructor) */
	virtual void raw_load_cache(const char* cache_path);

	/** @brief pokedex reference (for API access in ::fetch_market_value) */
	Pokedex* pokedex = nullptr;

	/** @brief add cache path before filename */
	virtual std::string prefix_cache_path(const char* filename);

	/** @brief thread that creates `complete` file when both images are downloaded */
	std::thread* image_download_thread = nullptr;

	/** @brief image API url */
	std::string url_card_normal = "";
	/** @brief image API url */
	std::string url_card_hires = "";

public:
	PokemonCard(Pokedex* pokedex = nullptr);
	virtual ~PokemonCard();

	/** @brief string stream output (for printing card) */
	friend std::ostream& operator << (std::ostream& output, const PokemonCard& card);

	std::string id = ""; /** @brief pokemon id (with set prefix) */
	std::string name = ""; /** @brief pokemon name */
	unsigned hp = 0; /** @brief pokemon max health points */
	double value = 0.f; /** @brief pokemon card current market value */
	std::vector<std::string> attacks = {}; /** @brief list of possible attacks */

	/** @brief get short card identifier: "Name (ID)" */
	virtual std::string short_identifier();

	/** @brief use API to fetch `this->hp` */
	virtual void fetch_market_value();

	/** @brief check if all files are downloaded */
	virtual void verify_files();
	/** @brief download images */
	virtual void download_files();

	struct from_json; // named constructors (defined below)
	struct from_cache;

	/** @brief set cache */
	virtual void set_pokedex(Pokedex* pokedex);

	/** @brief get (relative) path to card image */
	virtual std::string image_location();
	/** @brief get (relative) path to hires card image */
	virtual std::string image_location_hires();
};

struct PokemonCard::from_json : public PokemonCard {
	from_json(nlohmann::json json_data) : PokemonCard() {
		PokemonCard::raw_load_json(json_data);
	}
};

struct PokemonCard::from_cache : public PokemonCard {
	from_cache(Pokedex* pokedex, std::string cache_path) : PokemonCard(pokedex) {
		PokemonCard::raw_load_cache(cache_path.c_str());
	}
};