import path from "path";
import fs from "fs";
import request from "request";

/*const path = require('path');
const fs = require("fs");
const request = require('request');*/

const dirname = path.dirname(process.argv[1]);

function F() {
  var t = this;
  t.data = {};
  var pathfile = null;
  t.connect = function(pathin, structure = false, force = false, dir=dirname) {
    pathfile = jpath(dir, pathin);
    if (!fs.existsSync(pathfile)||!fs.lstatSync(pathfile).isFile()) {
      console.warn("Config does't exists. It will be created: "+pathfile);
    }else{
      t.data = t.fromTOML(fs.readFileSync(pathfile).toString());
    }
    if (typeof structure == "object") {
      var sgroups = Object.keys(structure);
      for (var i = 0; i < sgroups.length; i++) {
        var sgroup = structure[sgroups[i]];
        if (!t.data[sgroups[i]]) t.data[sgroups[i]] = {};
        var snames = Object.keys(sgroup);
        for (var j = 0; j < snames.length; j++) {
          if (!t.data[sgroups[i]][snames[j]]) {
            t.data[sgroups[i]][snames[j]] = sgroup[snames[j]].default || "";
          }
          switch (sgroup[snames[j]].type || "none") {
            case "number":
              t.data[sgroups[i]][snames[j]] = Number(t.data[sgroups[i]][snames[j]]);
              break;
            case "boolean":
              t.data[sgroups[i]][snames[j]] = Boolean(t.data[sgroups[i]][snames[j]]);
              break;
            case "string":
              t.data[sgroups[i]][snames[j]] = String(t.data[sgroups[i]][snames[j]]);
              break;
          }
        }
      }
      if (force) {
        var keys = Object.keys(t.data);
        for (var i = 0; i < keys.length; i++) {
          let group = keys[i];
          if(typeof structure[group] == "undefined"){
            delete t.data[group];
            continue;
          }
          var names = Object.keys(t.data[keys[i]]);
          for (var j = 0; j < names.length; j++) {
            if(typeof structure[keys[i]][names[j]] == "undefined")delete t.data[keys[i]][names[j]];
          }
        }
      }
    }
    t.save();
  };
  t.get = function(group, name, empty = null) {
    return (t.data[group]||{})[name]||empty;
  };
  t.set = function(group, name, value) {
    if(!t.data[group]) t.data[group] = {};
    t.data[group][name] = value;
  };
  t.save = function() {
    fs.writeFileSync(pathfile, t.toTOML(t.data));
  };
  t.fromTOML = function(toml) {
    var out = {};
    var group = "default"; //most resent group name
    var data = toml.split("\n");
    for (var i = 0; i < data.length; i++) {
      let now = data[i].trim();
      if (now.startsWith("[") && now.endsWith("]")) {
        group = now.slice(1, -1);
        out[group] = {};
      } else if (now.includes("=")) {
        let nows = now.split("=");
        let name = nows.splice(0, 1)[0].trim();
        let data = nows.join("=").trim();
        out[group][name] = createType(data);
      }
    }
    return out;
  };
  t.toTOML = function(json) {
    var out = "";
    var keys = Object.keys(json);
    for (var i = 0; i < keys.length; i++) {
      let group = keys[i];
      out += `\n[${group}]\n`;
      var names = Object.keys(json[keys[i]]);
      for (var j = 0; j < names.length; j++) {
        out += names[j] + "=" + json[keys[i]][names[j]] + "\n";
      }
    }
    return out;
  };
  t.readPath = function(pathin,dir=dirname){
    return new Promise((response,reject)=>{
      if(pathin.startsWith("http")){
        request(pathin, function(err, res, body) {
          if(res.statusCode==200&&body!="error"&&!err){
            response(body);
          }else{
            reject("Error occurred while fetching: "+pathin);
          }
        });
      }else{
        const pathf = jpath(dir, pathin);
        if(!fs.existsSync(pathf)||!fs.lstatSync(pathf).isFile()) {
          reject("Coud not find File: "+pathf);
        }else{
          try {
            var content = fs.readFileSync(pathfile).toString();
            response(content);
          } catch (e) {
            reject("Error occurred while reading: "+pathf);
          }
        }
      }
    });
  };
  t.readPathes = function (...pathes){
    return new Promise(async (res,rej)=>{
      var out = [];
      for (var i = 0; i < pathes.length; i++) {
        try {
          out[i] = await t.readPath(pathes[i]);
        } catch (e) {
          rej(e);
        }
      }
      res(out);
    });
  };

  function jpath(a, b) {
    if (b.startsWith("/")) {
      return b;
    }
    return path.join(a, b);
  }

  function createType(data) {
    if (data == "true") {
      return true;
    }
    if (data == "false") {
      return false;
    }
    if (data.toLowerCase() == "infinity") {
      return Infinity;
    }
    if (data.toLowerCase() == "-infinity") {
      return -Infinity;
    }
    if (!isNaN(data)) {
      return Number(data);
    }
    return data;
  }
}

export default F;