#include <algorithm> 
#include <cctype>
#include <fstream>
#include <iostream>
#include <memory>
#include <stdexcept>
#include <sstream>
#include <string>
#include <sys/stat.h>
#include <unistd.h>
#include <vector>

using namespace std;

class DATA {
    public:
        string loc = "";
        string script = "";
        string name = "";
        bool disabled = false;
};

static inline void trim(string &s) {
    s.erase(s.begin(), find_if(s.begin(), s.end(), [](unsigned char ch) {
        return !isspace(ch);
    }));
    s.erase(find_if(s.rbegin(), s.rend(), [](unsigned char ch) {
        return !isspace(ch);
    }).base(), s.end());
}

string exec(const char* cmd) {
    array<char, 128> buffer;
    string result;
    unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
    if (!pipe) {
        throw runtime_error("popen() failed!");
    }
    while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
        result += buffer.data();
    }
    trim(result);
    return result;
}


const int DATALEN = 2;
void splitData(string str, DATA &data) {

    stringstream ssin(str);

    while (ssin.good()) {
        if (data.loc.length() == 0) {
            ssin >> data.loc;
            continue;
        }

        if (data.script.length() > 0)
            data.loc += " " + data.script;

        ssin >> data.script;
    }

    if (data.loc[0] == '~')
        data.loc = getenv("HOME") + data.loc.substr(1);

    string cmd = "cd \"" + data.loc + "\" && cut -d \"=\" -f 2 <<< $(npm run env | grep npm_package_name)";
    data.name = exec(cmd.c_str());

}

void loadfile(vector<DATA> &scripts) {
    ifstream infile("scripts");
    string line;
    int linenum = 0;
    while (getline(infile, line)) {
        linenum++;
        istringstream iss(line);
        string str = iss.str();

        if (str.length() == 0)
            continue;

        DATA data;
    
        if (str[0] == '#') {
            data.disabled = true;
            str = str.substr(1);
        }

        splitData(str, data);

        if (data.loc.length() == 0 || data.script.length() == 0 || data.name.length() == 0) {
            cout << "WARNING: skipping line " << linenum << endl;
            continue;
        }

        scripts.push_back(data);

    }

}

int main() {

    vector<DATA> scripts;

    loadfile(scripts);

    for (int i = 0; i < scripts.size(); i++) {
        DATA data = scripts.at(i);
    }

    struct stat sb;
    time_t mtime = 0;

    while (true) {
        stat("scripts", &sb);
        if (sb.st_mtime > mtime) {
            mtime = sb.st_mtime;
            cout << "modified" << endl;
        }
        sleep(1);
    }

    return 0;

}