const mongoose = require('mongoose')

const UserSchema = new mongoose.Schema({
	username: {
	type: String,
	required: true
	},
	email: {
	type: String,
	unique: true,
	required: true
	},
	password: {
	type: String,
	required: true
	},
	date: {
	type: Date,
	default: Date.now
	}
})

module.exports = User = mongoose.model('user', UserSchema)

class DoublyLinkedList {
  constructor() {
    this.nodes = [];
  }

  get size() {
    return this.nodes.length;
  }

  get head() {
    return this.size ? this.nodes[0] : null;
  }

  get tail() {
    return this.size ? this.nodes[this.size - 1] : null;
  }

  insertAt(index, value) {
    const previousNode = this.nodes[index - 1] || null;
    const nextNode = this.nodes[index] || null;
    const node = { value, next: nextNode, previous: previousNode };

    if (previousNode) previousNode.next = node;
    if (nextNode) nextNode.previous = node;
    this.nodes.splice(index, 0, node);
  }

  insertFirst(value) {
    this.insertAt(0, value);
  }

  insertLast(value) {
    this.insertAt(this.size, value);
  }

  getAt(index) {
    return this.nodes[index];
  }

  removeAt(index) {
    const previousNode = this.nodes[index - 1] || null;
    const nextNode = this.nodes[index + 1] || null;

    if (previousNode) previousNode.next = nextNode;
    if (nextNode) nextNode.previous = previousNode;

    return this.nodes.splice(index, 1);
  }

  clear() {
    this.nodes = [];
  }

  reverse() {
    this.nodes = this.nodes.reduce((acc, { value }) => {
      const nextNode = acc[0] || null;
      const node = { value, next: nextNode, previous: null };
      if (nextNode) nextNode.previous = node;
      return [node, ...acc];
    }, []);
  }

  *[Symbol.iterator]() {
    yield* this.nodes;
  }
}

const list = new DoublyLinkedList();

list.insertFirst(1);
list.insertFirst(2);
list.insertFirst(3);
list.insertLast(4);
list.insertAt(3, 5);

list.size;                      // 5
list.head.value;                // 3
list.head.next.value;           // 2
list.tail.value;                // 4
list.tail.previous.value;       // 5
[...list.map(e => e.value)];    // [3, 2, 1, 5, 4]

list.removeAt(1);               // 2
list.getAt(1).value;            // 1
list.head.next.value;           // 1
[...list.map(e => e.value)];    // [3, 1, 5, 4]

list.reverse();
[...list.map(e => e.value)];    // [4, 5, 1, 3]

list.clear();
list.size;                      // 0

const levenshteinDistance = (s, t) => {
  if (!s.length) return t.length;
  if (!t.length) return s.length;
  const arr = [];
  for (let i = 0; i <= t.length; i++) {
    arr[i] = [i];
    for (let j = 1; j <= s.length; j++) {
      arr[i][j] =
        i === 0
          ? j
          : Math.min(
              arr[i - 1][j] + 1,
              arr[i][j - 1] + 1,
              arr[i - 1][j - 1] + (s[j - 1] === t[i - 1] ? 0 : 1)
            );
    }
  }
  return arr[t.length][s.length];
};

levenshteinDistance('duck', 'dark'); // 2

const insertionSort = arr =>
  arr.reduce((acc, x) => {
    if (!acc.length) return [x];
    acc.some((y, j) => {
      if (x <= y) {
        acc.splice(j, 0, x);
        return true;
      }
      if (x > y && j === acc.length - 1) {
        acc.splice(j + 1, 0, x);
        return true;
      }
      return false;
    });
    return acc;
  }, []);
  
insertionSort([6, 3, 4, 1]); // [1, 3, 4, 6]

results =
{
 "11345240":"Media Comment-80e47004-1719-493a-af69-a43b2652b41c",
 "11345282":"zoom_3_22_21.mp4",
 "11345303":"Recording-2.m4a",
 "11345348":"February 12%2C 2021.mp4",
 "11345826":"Lecture_Rousso_Chapter_06-2.pptx",
 "11345933":"Themes_InClassAssigment.pptx",
 "11346193":"Agenda – Week of March23.pptx",
 "11346318":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Bb - Score.pdf",
 "11346319":"MUJS 2370 SP2021 Updated Rhythm Changes Drills C - Score.pdf",
 "11346322":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Eb - Score.pdf",
 "11346323":"MUJS 2370 Updated Rhythm Changes Drills Bass - Score.pdf",
 "11346381":"Anthropology with colored highlighter analysis - Mar 22 2021 - 10-36 AM.pdf",
 "11346449":"Anthropology with colored highlighter analysis - Mar 22 2021 - 10-36 AM.pdf",
 "11346450":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Bb - Score.pdf",
 "11346451":"MUJS 2370 SP2021 Updated Rhythm Changes Drills C - Score.pdf",
 "11346453":"MUJS 2370 SP2021 Updated Rhythm Changes Drills Eb - Score.pdf",
 "11346454":"MUJS 2370 Updated Rhythm Changes Drills Bass - Score.pdf",
 "11346495":"Steinel chromatic ornamentation étude rhythm changes - Aug 23 2020 - 12-19 PM.pdf",
 "11346532":"Media Comment-136242b4-7f2c-4d5d-8aa4-091f07e797cf",
 "11346581":"2019 Trust Based Relationship Intervention Manual.pdf",
 "11346584":"TBRI ppt.pptx",
 "11346593":"Trauma informed care.ppt"
}

function NewTab(testing) {
  window.open(testing, "_blank");
}

for(test in results) {
  var testing = 'https://unt.instructure.com/files/' + test + '/download';
  NewTab(testing);
  //window.open = 'https://unt.instructure.com/files/' + test + '/download';
}

const getSearchTerm = delimiter => {
	let searchTerm = "";

	for (let i = 1; i < commands.length - 1; i++)
	searchTerm = searchTerm + commands[i] + delimiter;

	searchTerm += commands[commands.length - 1];

	return searchTerm;
	};