package ru.foror.articles.tapestry.blog.domain;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.Lob;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

import org.apache.tapestry5.beaneditor.NonVisual;
import org.apache.tapestry5.beaneditor.Validate;
import org.hibernate.search.annotations.DocumentId;
import org.hibernate.search.annotations.Field;
import org.hibernate.search.annotations.Index;
import org.hibernate.search.annotations.Indexed;
import org.hibernate.search.annotations.Store;
import org.hibernate.validator.Length;
import org.hibernate.validator.NotEmpty;
import org.hibernate.validator.NotNull;

import ru.foror.articles.common.domain.Category;
import ru.foror.articles.common.domain.ISearchResult;
import ru.foror.articles.common.domain.IWithTags;
import ru.foror.articles.common.utils.Html;

/**
 * Статья в блоге.
 * 
 * @author Alexey Pomogaev foror@mail.ru
 */
@Indexed(index="article")
@Entity
@Table(name="article")
@SequenceGenerator(name="default_seq", sequenceName="default_seq", allocationSize=1)
public class Article implements Serializable, ISearchResult, IWithTags {

	private static final long serialVersionUID = 6774264953970869480L;

	@DocumentId
	@Id
	@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="default_seq")
	@NonVisual
	private Long id;
	
	@NotEmpty
	@Length(max=100)
	@Validate("required,maxlength=100")
	private String title;
	
	@NotEmpty
	@Validate("required")
	@Lob
	private String body;
	
	@NotNull
	@ManyToOne
	@JoinColumn(name = "author_id")
	private Account author;
	
	@NotNull
	private Date created;
	
	@NotNull
	@ManyToOne
	@JoinColumn(name = "category_id")
	private Category category;
	
	@ManyToMany
	@JoinTable(
    		name="articles_tags",
    		joinColumns={@JoinColumn(name="article_id")},
    		inverseJoinColumns={@JoinColumn(name="tag_id")})
	private List<Tag> tags;
	
	@OneToMany(mappedBy="article", cascade=CascadeType.REMOVE)
	private List<Comment> comments;
	
	public Article() {
		created = new Date(System.currentTimeMillis());
	}

	public Article(String title, String body, Account author, Category category) {
		this();
		this.title = title;
		this.body = body;
		this.author = author;
		this.category = category;
	}
	
	@Field(index=Index.TOKENIZED, store=Store.YES)
	public String getTitle() {
		return title;
	}
	
	@NonVisual
	@Field(index=Index.NO, store=Store.YES)
	public String getObjectOwner() {
		return author.getNickname();
	}
	
	@NonVisual
	@Field(index=Index.TOKENIZED, store=Store.YES)
	public String getPlainText() {
		return Html.getText(body, true, false, false);
	}
	
	@NonVisual
	@Field(index=Index.NO, store=Store.YES)
	public Date getDate() {
		return created;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getBody() {
		return body;
	}

	public void setBody(String body) {
		this.body = body;
	}

	public Account getAuthor() {
		return author;
	}

	public void setAuthor(Account author) {
		this.author = author;
	}

	public Date getCreated() {
		return created;
	}

	public void setCreated(Date created) {
		this.created = created;
	}

	public Category getCategory() {
		return category;
	}

	public void setCategory(Category category) {
		this.category = category;
	}

	public Long getId() {
		return id;
	}
	
	@SuppressWarnings("unchecked")
	public List<? extends ru.foror.articles.common.domain.Tag> getTags() {
		return (List) tags;
	}

	public void initTags(int size) {
		tags = new ArrayList<Tag>(size);
	}
	
	public List<Comment> getComments() {
		return comments;
	}
	
	public void addComment(Comment comment) {
		if (comments == null) {
			comments = new ArrayList<Comment>(1);
		}
		
		if (comments.contains(comment)) {
			return;
		} else {
			comments.add(comment);
			comment.setArticle(this);
		}
	}

	@Override
	public int hashCode() {
		final int PRIME = 31;
		int result = 1;
		result = PRIME * result + ((created == null) ? 0 : created.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		final Article other = (Article) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}
}