package org.oxerr.viagogo.model.request;
   
   import java.beans.Transient;
   import java.io.Serializable;
   import java.time.Instant;
   import java.util.Arrays;
   import java.util.stream.Collectors;
   
   import org.apache.commons.lang3.builder.EqualsBuilder;
  import org.apache.commons.lang3.builder.HashCodeBuilder;
  import org.oxerr.viagogo.model.Link;
  
  public abstract class PagedRequest implements Serializable {
  
  	public interface Sort {
  
  		String getCode();
  
  	}
  
  	private static final long serialVersionUID = 2023112401L;
  
  	/**
  	 * Specifies which page of data to retrieve.
  	 */
  	private Integer page;
  
  	/**
  	 * Set custom page sizes on response.
  	 */
  	private Integer pageSize;
  
  	/**
  	 * Filters the response to only return items that have been updated since
  	 * the given timestamp.
  	 */
  	private Instant updatedSince;
  
  	/**
  	 * Determines the ordering of items.
  	 * A comma-separated string.
  	 */
  	private String sort;
  
  	protected PagedRequest() {
  	}
  
  	protected PagedRequest(Link link) {
  		this.setPage(link.getFirstAsInteger("page"));
  		this.setPageSize(link.getFirstAsInteger("page_size"));
  		this.setUpdatedSince(link.getFirstAsInstant("updated_since"));
  		this.setSort(link.getFirstAsString("sort"));
  	}
  
  	public Integer getPage() {
  		return page;
  	}
  
  	public void setPage(Integer page) {
  		this.page = page;
  	}
  
  	public Integer getPageSize() {
  		return pageSize;
  	}
  
  	public void setPageSize(Integer pageSize) {
  		this.pageSize = pageSize;
  	}
  
  	public Instant getUpdatedSince() {
  		return updatedSince;
  	}
  
  	public void setUpdatedSince(Instant updatedSince) {
  		this.updatedSince = updatedSince;
  	}
  
  	public String getSort() {
  		return sort;
  	}
  
  	public void setSort(String sort) {
  		this.sort = sort;
  	}
  
  	@Transient
  	public void setSort(Sort... sorts) {
  		this.setSort(Arrays.stream(sorts).map(Sort::getCode).collect(Collectors.joining(",")));
  	}
  
  	@Override
  	public int hashCode() {
  		return HashCodeBuilder.reflectionHashCode(this);
  	}
  
  	@Override
  	public boolean equals(Object obj) {
  		if (this == obj) {
 			return true;
 		}
 		if (!(obj instanceof PagedRequest)) {
 			return false;
 		}
 		PagedRequest rhs = (PagedRequest) obj;
 		return EqualsBuilder.reflectionEquals(this, rhs);
 	}
 
 }