## Third Assignment: Movie Explorer 🎬 + Rational Calculator 🧮
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Welcome to Your Third Assignment in the Advanced Programming Course!

This assignment consists of two separate parts. You must complete both parts.

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## Part 1: Rational Class (Rational Numbers)
In this part, you will implement a Rational class that supports basic mathematical operations.

A `RationalTest` class is provided.
+You can run it to verify that your implementation works correctly.
+Use it to test your logic before submitting.

Tasks:
Define fields for numerator and denominator

Implement addition, subtraction, multiplication, and division as instance methods

Implement addition, subtraction, multiplication, and division as static methods

Note: Detailed TODO comments are provided inside Rational.java.
Do NOT modify the constructor, simplify logic, or completed methods.
Only complete the TODO methods.

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## Part 2: Movie Explorer 🎬 (Using API)
In this part, you will develop a Java application that fetches movie data from an API and allows users to browse and search movies.

### Files Provided
- `Movie.java`
- `Genre.java`
- `MovieService.java`
- `Main.java`

The `Genre` class is already implemented as a sample.
You must design and implement the `Movie` class yourself (fields, constructors, getters, setters, toString if needed).

We have already implemented two methods that call the API and return the raw JSON response as a `String`:

- `getGenresList()` → calls the API and returns the list of genres in JSON format.
- `getMoviesByGenreList(Long genreId, Long page)` → calls the API and returns the list of movies for a specific genre and page in JSON format.

Do NOT modify:
  API URLs
  `getGenresList()`
  `getMoviesByGenreList()`

Only complete the TODO methods.

### Your Tasks

1. Complete the `Movie` class (fields, constructor, getters, and setters).

2. Write a method that receives the JSON string returned by `getMoviesByGenreList()` and converts it into a `List<Movie>`.

3. Write another method that displays the list of movies (for the selected genre) in a clean and readable format.

4. Implement a console menu in `Main` that allows the user to:
    - View the list of genres
    - Select a genre
    - View movies for the selected genre (with pagination)
After completing `MovieService`, you must also complete the `Main` class
so the menu works correctly.
### Note

To understand what fields should exist in the `Genre` and `Movie` classes, it is recommended that you first call the two API methods once and inspect the raw JSON response. This will help you determine the exact structure of the data and define the appropriate class fields.
We implemented JSON parsing using **Gson** in the project.
However, the **Jackson dependency is also included**.
If you prefer, you are allowed to use Jackson instead of Gson.

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## Objectives ✏️
By completing this assignment, you will:

Reinforce OOP concepts: class design, constructors, encapsulation, collections

Practice instance methods vs. static methods

Work with JSON parsing and REST APIs

Design a simple console-based menu

Improve Git workflow and project management

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## Prerequisites ✅
Git

Java (version 23 or 25)

Maven as a package manager

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## Tasks Summary 📝
Fork the repository and clone it locally

Create and switch to a development branch

Complete Part 1 (Rational.java) following the TODO comments

Complete Part 2 (Movie.java, Genre.java, MovieService.java, Main.java) following the TODO comments

Ensure the code compiles and runs correctly

Commit and push regularly

Submit a pull request from development to main

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## Evaluation Criteria ⚖️
Functionality: Code compiles and runs without errors; all features work correctly

Code Quality: Clean, readable, well-structured code with proper naming

Understanding: You must be able to explain your implementation

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## Bonus Tasks ✒️
1. Fetch and display movie information using movie ID

Implement movie search by ID. User enters an ID, program displays complete movie details.

### ⚠️ First: Add Missing Fields to Movie Class
The API returns more data than your current class supports. Add these fields:
- `actors`, `awards`, `director`, `imdb_id`, `imdb_votes`, `metascore`, `plot`, `rated`, `released`, `runtime`, `type`, `writer`

### Implementation Steps:

1. **Complete `getMovieById(movieId)`**
   - Build request to: `https://api.meshcomp.ir/api/v1/movies/{movieId}`
   - If status 200 → return JSON body, else → return null

2. **Complete `displayMovieDetails(movieId)`**
   - Call `getMovieById()` → check for null
   - Use Gson to parse JSON to Movie object (after adding fields above)
   - Print formatted output (see example below)

### Example Output:
```
           =======================================================================
                               THE SHAWSHANK REDEMPTION (1994)
           =======================================================================
           Rating: 9.3/10  |  Votes: 1,738,596
           Director: Frank Darabont
           Cast: Tim Robbins, Morgan Freeman, Bob Gunton, William Sadler
           Genre: Crime, Drama
           Runtime: 142 min  |  Rated: R
           Country: USA  |  Released: 14 Oct 1994
           Plot: Two imprisoned men bond over a number of years, finding
           solace and eventual redemption through acts of common decency.
           Awards: Nominated for 7 Oscars. Another 19 wins & 30 nominations.
           =======================================================================
           
```
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## References 📚

API (Replace placeholders with numbers):
  - genres: https://api.meshcomp.ir/api/v1/genres
  - movies: https://api.meshcomp.ir/api/v1/movies
  - movies (specifying the page): https://api.meshcomp.ir/api/v1/movies?page={pageId}
  - movies by genres: https://api.meshcomp.ir/api/v1/genres/{genreId}/movies?page={pageId}
  - details of a specific movie: https://api.meshcomp.ir/api/v1/movies/{movieId}

Video Tutorials (watch before starting the assignment):
  [link](https://drive.meshcomp.ir/d/a29a5f6ea6484834bcf0/)

Gson Tutorial:
[`Gson` Reading and Parsing Data from a JSONObject](https://drive.meshcomp.ir/f/e8dea01f31b24cbca152/)
  

Jackson Tutorial:
[`Jackson` Parsing Json in Java Tutorial - Part 1 Jackson and Simple Objects](https://drive.meshcomp.ir/f/005d8f8fc19a44f4927b/)

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## Submission ⌛
Deadline: May 1st (11 Ordibehesht)