#include "main.h"
#include <sys/stat.h>

extern "C" {

inline bool path_exists (const std::string& name) {
    struct stat buffer;
    return (stat (name.c_str(), &buffer) == 0);
}

CLAPI void* initAug(augSettings settings, int flags) {

    if(!path_exists(std::string(settings.root))) {
        std::cout << "error: root path is invalid." << settings.root << std::endl;
        return nullptr;
    }

    return aug_init(settings.root, settings.loadPath, flags);
}

CLAPI void closeAug(void* aug) {
    aug_close((augeas*)aug);
}

// Wrapper of aug_preview
CLAPI void printPreview(augeas* aug, const char* matchPath, const char* filePath) {

    if(aug == nullptr) {
        std::cout << "error: augeas is not initialized." << std::endl;
        return;
    }
    
    int r;
    char *s;
    char *etc_hosts_fn = nullptr;
    FILE *hosts_fp = nullptr;
    char *hosts_txt = nullptr;

    
    r = aug_load_file(aug,filePath);

    if(r != 0) {
        std::cout << "Error loading file." << std::endl;
        return;
    }

    r = aug_preview(aug,matchPath,&s);

    if(r != 0) {
        std::cout << "Failure previewing." << std::endl;
        return;
    }

    std::cout << s << std::endl;

    free(hosts_txt);
    free(s);
}


// Print tree of the matchPath
CLAPI void printAugTree(
        augeas *aug,
        const char* matchPath,
        const char* filePath
) {

    if(aug == nullptr) {
        std::cout << "error: augeas is not initialized." << std::endl;
        return;
    }
    
    int r;
    
    FILE *out = tmpfile();

    r = aug_load_file(aug, filePath);
 
    if(r != 0) {
        std::cout << "error: can't load file." << std::endl;
        return;
    }

    r = aug_print(aug, out,matchPath);

    if(r != 0) {
        std::cout << "error: aug_print failure." << std::endl;
        return;
    }

    std::map <std::string, std::string> stdBindList;
    std::map <std::string ,std::string>::iterator pos;

    char line[256];
    rewind(out);
    while (fgets(line, 256, out) != nullptr) {
        // remove end of line
        line[strlen(line) - 1] = '\0';
        std::string str_matchPath = matchPath;
        std::string s = line;
        // skip comments
        if (s.find("#comment") != std::string::npos)
            continue;
        s = s.substr(str_matchPath.length() - 1);
        // split by '=' sign
        size_t eqpos = s.find(" = ");
        if (eqpos == std::string::npos)
            continue;
        // extract key and value
        std::string key = s.substr(0, eqpos);
        std::string value = s.substr(eqpos + 3);
        // remove '"' sign from around value
        value.erase(value.begin());
        value.erase(value.end() - 1);
        stdBindList.insert(std::pair<std::string,std::string>(key,value)); // 2

    }

    fclose(out);

    for (pos = stdBindList.begin();pos!=stdBindList.end();pos++)
    {
        std::cout << "Key: " << pos->first << ";" << " Value: " << pos->second << std::endl;
    }

}

}