#include <cstdio>
#include <string>

using namespace std;

#define NB_VAL_PER_LINE 256

#define FILE_BEGIN "#include <string>\n\
#include <unordered_map>\n\
\n\
namespace Resource {\n\
std::unordered_map<std::string, const char*> *resourceFilesData;\n"

#define FILE_MID "\nvoid initResourceData()\n\
{\n\
	resourceFilesData = new std::unordered_map<std::string, const char*>();\n"

#define FILE_END "\n\
}\n\
\n\
const char* get(const std::string &fileName)\n\
{\n\
	if(resourceFilesData->count(fileName) > 0)\n\
		return (*resourceFilesData)[fileName];\n\
	else\n\
		return NULL;\n\
}\n\
}\n"

unsigned int n = 0;

bool addFile(const string &inFile, FILE *out)
{
    FILE *in = fopen(inFile.c_str(), "r");
    if(in == NULL)
    {
        fprintf(stderr, "can't open \"%s\" for readingn", inFile.c_str());
        return false;
    }
    fprintf(out, "\nconst char data%d[] = {\n", n);
    char ptr[NB_VAL_PER_LINE];
    size_t nbRead;
    do
    {
        nbRead = fread(ptr, sizeof(char), NB_VAL_PER_LINE, in);
        for(unsigned int i=0; i<nbRead; ++i)
            fprintf(out, i ? ",0x%x" : "\t0x%x", ptr[i]);
        fprintf(out, "\n");
    }
    while(nbRead == NB_VAL_PER_LINE);
	fprintf(out, "};\n");
    ++n;
    fclose(in);
    return true;
}

int main(int argc, char *argv[])
{
    if(argc < 3)
    {
        printf("usage : %s RESOURCE_FILE.cpp [LIST_OF_FILES_TO_BAKE]\n", argv[0]);
        return EXIT_SUCCESS;
    }
    
    FILE *out = fopen(argv[1], "w");
    if(out == NULL)
    {
        fprintf(stderr, "can't open \"%s\" for writing\n", argv[1]);
        return EXIT_FAILURE;
    }
    
    fprintf(out, FILE_BEGIN);
    for(int i=2; i<argc; ++i)
    {
        if(!addFile(argv[i], out))
        {
            fclose(out);
            return EXIT_FAILURE;
        }
        else
            printf("successfully added \"%s\" to \"%s\".\n", argv[i], argv[1]);
    }
	fprintf(out, FILE_MID);
	for(int i=0; i<n; ++i)
		fprintf(out, "\t(*resourceFilesData)[\"%s\"] = data%d;\n", argv[2+i], i);
    fprintf(out, FILE_END);
    fclose(out);
    printf("successfully created resource file \"%s\".\n", argv[1]);
    return EXIT_SUCCESS;
}