class User {
  constructor(username, password, email) {
    this.username = username;
    this.password = password;
    this.email = email;
  }
}

class UserManager {
  constructor() {
    // this.users = []; same as row below
  }

  users = [new User("slavozar", "bahur", "[email protected]")];
  loggedUser = null;

  // register
  addUser(user) {
    const existingUsers = this.users.filter(
      (e) => e.username === user.username
    );

    if (existingUsers.length) {
      console.log("User already exists");
    } else {
      this.users.push(user);
      console.log("User added");
    }
  }

  login(user) {
    if (this.loggedUser) {
      console.log("User already logged");
    } else {
      const existingUsers = this.users.filter(
        (e) => e.username === user.username && e.password === user.password
      );

      if (existingUsers.length) {
        this.loggedUser = user;
        console.log("User logged in");
      } else {
        console.log("Wrong credentials");
      }
    }
  }

  logout() {
    this.loggedUser = null;
    console.log("Logged Out");
  }

  deleteUser(user) {
    this.users = this.users.filter((e) => e.username !== user.username);
  }
}

class Offer {
  constructor(price, title, photos, description, vehicle, creator) {
    this.price = price;
    this.title = title;
    this.photos = photos;
    this.description = description;
    this.vehicle = vehicle;
    this.creator = creator;
  }
}

class Vehicle {
  constructor(make, model) {
    this.make = make;
    this.model = model;
  }
}

class Car extends Vehicle {
  constructor(make, model, color, tyres) {
    super(make, model);
    this.color = color;
    this.tyres = tyres;
  }
}

class OfferManager {
  offers = [];

  addOffer(offer, userManager) {
    // ? operator before property access is called optional chaining
    // this expression will be undefined if userManager is null or undefined or if
    // userManager.loggedUser is null or undefined
    if (offer.creator.username === userManager?.loggedUser?.username) {
      this.offers.push(offer);
      console.log(`Offer with title "${offer.title}" added`);
    }
  }

  filterOffers(property, keyWord) {
    let results = 0;
    this.offers.forEach((e) => {
      if (e[property] === keyWord) {
        console.log(e);
        results++;
      } else if (
        e[property].toLowerCase().includes(keyWord.toLowerCase()) &&
        typeof e[property] === "string"
      ) {
        console.log(e);
        results++;
      } else if (property === "vehicle") {
        let vehicleValues = Object.values(e[property]);
        vehicleValues.forEach((el) => {
          if (el === keyWord) {
            console.log(e);
          } else if (
            typeof el === "string" &&
            el.toLowerCase().includes(keyWord.toLowerCase())
          ) {
            console.log(e);
          }
        });
        results++;
      }
    });
    if (!results) {
      console.log("Not found!");
    }
  }

  editOffer(offer, userManager, property, newValue) {
    if (
      offer.creator.username === userManager?.loggedUser?.username &&
      offer.hasOwnProperty(property) &&
      property !== "creator"
    ) {
      offer[property] = newValue;
      console.log("Offer has been edited");
    } else if (!userManager.loggedUser) {
      console.log("Log in for editioning of an offer");
    } else if (offer.creator.username !== userManager?.loggedUser?.username) {
      console.log("You are trying to edit offer of another user");
    } else {
      console.log("This property doesn't corespond this offer");
    }
  }

  deleteOffer(offer, userManager) {
    if (
      this.offers.length > 0 &&
      offer.creator.username === userManager?.loggedUser?.username
    ) {
      this.offers = this.offers.filter((e) => e.title !== offer.title);
      console.log("Offer was deleted");
    } else if (!userManager.loggedUser) {
      console.log("Log in for deletion of the offer");
    } else if (offer.creator.username !== userManager?.loggedUser?.username) {
      console.log("You are trying to delete offer of another user");
    }
  }
}

let userManager = new UserManager();
let offerManager = new OfferManager();

let joro = new User("gosho", "bahur1", "[email protected]");
let testUser = new User("TestName", "TestPass", "[email protected]");

let audi = new Car("Audi", "A3", 200, "Top!");
let renault = new Car("Renualt", "Austra", 150, "Top!");

let offer = new Offer(
  1000,
  "Realni km, nov vnos, baba q e karala.",
  ["photo1", "photo2"],
  "Mnogo e zapazena. Babata e hodila samo do magazina s neq. Napylno obslujena!",
  audi,
  joro
);

let offer2 = new Offer(
  2000,
  "4isto nova, malko polzvana, prodavam q za6oto samo sibira prah!",
  ["photo1", "photo2"],
  "Naistina ne e polzvana po4ti nikoga, kupena za x3 pari ot teku6ta tsena, ne e za izpuskane!",
  renault,
  testUser
);

console.log("Start activity on site:");

userManager.addUser(joro);
userManager.addUser(testUser);

userManager.login(joro);
offerManager.addOffer(offer, userManager);
userManager.logout();

userManager.login(testUser);
offerManager.addOffer(offer2, userManager);
offerManager.editOffer(offer2, userManager, "title", "New test title");
userManager.logout();

console.log("All offers after site activity:");
console.log(offerManager.offers);