#include <stdexcept>

#include "SDLFontContext.h"


using namespace crepe;
using namespace std;

SDLFontContext::SDLFontContext(){
	if (!FcInit()) {
            throw runtime_error("Failed to initialize Fontconfig.");
    }
}

SDLFontContext::~SDLFontContext(){
		FcFini();
}

unique_ptr<Asset> SDLFontContext::get_font_asset(const string & font_family) {
	
    // Create a pattern to search for the font family
    FcPattern* pattern = FcNameParse(reinterpret_cast<const FcChar8*>(font_family.c_str()));
    if (!pattern) {
        throw runtime_error("Failed to create font pattern.");
    }

    // Default configuration
    FcConfig* config = FcConfigGetCurrent();
    if (!config) {
        FcPatternDestroy(pattern);
        throw runtime_error("Failed to get current Fontconfig configuration.");
    }

    // Match the font pattern
    FcResult result;
    FcPattern* matched_pattern = FcFontMatch(config, pattern, &result);
    FcPatternDestroy(pattern);

    if (!matched_pattern) {
		FcPatternDestroy(matched_pattern);
        throw runtime_error("No matching font found.");
    }

    // Extract the file path
    FcChar8* file_path = nullptr;
    if (FcPatternGetString(matched_pattern, FC_FILE, 0, &file_path) != FcResultMatch || !file_path) {
        FcPatternDestroy(matched_pattern);
        throw runtime_error("Failed to get font file path.");
    }

    // Convert the file path to a string
    string font_file_path(reinterpret_cast<const char*>(file_path));
    FcPatternDestroy(matched_pattern);
    return move(make_unique<Asset>(font_file_path));
}