#ifndef SDL_HELPERS_H_
#define SDL_HELPERS_H_

#include <SDL2/SDL_ttf.h>

#include <iostream>
#include <string>

#include "json.hpp"

extern std::string default_font_name;

enum HorizontalAlign
{
	HALIGN_LEFT,
	HALIGN_CENTER,
	HALIGN_RIGHT
};

NLOHMANN_JSON_SERIALIZE_ENUM(HorizontalAlign,
{
	{HALIGN_LEFT, "left"},
	{HALIGN_CENTER, "center"},
	{HALIGN_RIGHT, "right"},
})

enum VerticalAlign
{
	VALIGN_TOP,
	VALIGN_CENTER,
	VALIGN_BOTTOM
};

NLOHMANN_JSON_SERIALIZE_ENUM(VerticalAlign,
{
	{VALIGN_TOP, "top"},
	{VALIGN_CENTER, "center"},
	{VALIGN_BOTTOM, "bottom"},
})

enum TextFit
{
	FIT_NONE,
	FIT_SHRINK,
	FIT_AUTO
};

NLOHMANN_JSON_SERIALIZE_ENUM(TextFit,
{
	{FIT_NONE, "none"},
	{FIT_SHRINK, "shrink"},
	{FIT_AUTO, "auto"},
})

enum ImageResize
{
	RESIZE_NONE,
	RESIZE_FIT,
	RESIZE_STRETCH
};

NLOHMANN_JSON_SERIALIZE_ENUM(ImageResize,
{
	{RESIZE_NONE, "none"},
	{RESIZE_FIT, "fit"},
	{RESIZE_STRETCH, "stretch"},
})

// Call this before everything
// Prints its messages
bool init_sdl();

// Call this at the end only if init has passed
void clean_sdl();

// A simple way to get a font pointer to use
// Can return NULL
TTF_Font* get_font(int size, const std::string& filename = default_font_name);

// Returns a rect to use during bliting of 2 surfaces
// base - surface on which the other is applied to
// applied - the surface which will be applied to the other
// hint - rect to hint visible area from applied - can be NULL
SDL_Rect surface_align(const SDL_Surface* base, const SDL_Surface* applied,
	HorizontalAlign halign, VerticalAlign valign, const SDL_Rect* hint = nullptr);

// Reads the file and tries to parse a JSON file with comments
// cfg - output json struct
// filename - filepath to open and read
// log - output errors to this ostream, silent if NULL
bool read_config_json(nlohmann::json& cfg, const std::string& filename, std::ostream* log = &std::cout);

// JSON Extractors - They do not override already set values if key is not present

void json_extract(const nlohmann::json& j, const std::string& key, std::string& out);
void json_extract(const nlohmann::json& j, const std::string& key, int& out);
void json_extract(const nlohmann::json& j, const std::string& key, bool& out);
void json_extract(const nlohmann::json& j, const std::string& key, HorizontalAlign& out);
void json_extract(const nlohmann::json& j, const std::string& key, VerticalAlign& out);
void json_extract(const nlohmann::json& j, const std::string& key, TextFit& out);
void json_extract(const nlohmann::json& j, const std::string& key, SDL_Color& out);
void json_extract(const nlohmann::json& j, const std::string& key, Uint8& out);
void json_extract(const nlohmann::json& j, const std::string& key, ImageResize& out);

#endif // SDL_HELPERS_H_