/*
* Copyright @ 2013 CurisTEC, S.A.S. All Rights Reserved.
*/
package net.curisit.securis.db;

import java.io.Serializable;
import java.util.Date;
import java.util.Objects;

import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.Id;
import jakarta.persistence.JoinColumn;
import jakarta.persistence.ManyToOne;
import jakarta.persistence.NamedQueries;
import jakarta.persistence.NamedQuery;
import jakarta.persistence.Table;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonBackReference;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.annotation.JsonProperty;

import net.curisit.securis.db.common.Metadata;

/**
* ApplicationMetadata
* <p>
* Single metadata entry (key/value/mandatory) attached to an {@link Application}.
* Uses a composite PK: (application_id, key).
* <p>
* Mapping details:
* - Table: application_metadata
* - PK: application_id + key (two @Id fields).
* - application: @ManyToOne with @JsonBackReference to avoid JSON cycles.
* - creation_timestamp exposed as "creation_timestamp".
*
* @author JRA
* Last reviewed by JRA on Oct 7, 2025.
*/
@JsonAutoDetect
@JsonInclude(Include.NON_NULL)
@Entity
@Table(name = "application_metadata")
@JsonIgnoreProperties(ignoreUnknown = true)
@NamedQueries({
    @NamedQuery(name = "list-application-metadata",
                query = "SELECT a FROM ApplicationMetadata a where a.application.id = :applicationId")
})
public class ApplicationMetadata implements Serializable, Metadata {

    private static final Logger LOG = LogManager.getLogger(ApplicationMetadata.class);

    private static final long serialVersionUID = 1L;

    /** Part of PK: owning application. */
    @Id
    @ManyToOne
    @JoinColumn(name = "application_id")
    @JsonBackReference
    private Application application;

    /** Part of PK: metadata key (quoted column name). */
    @Id
    @Column(name = "\"key\"")
    private String key;

    /** Arbitrary metadata value. */
    private String value;

    /** Whether this key is required for the parent application. */
    private boolean mandatory;

    /** Server-side creation timestamp. */
    @Column(name = "creation_timestamp")
    @JsonProperty("creation_timestamp")
    private Date creationTimestamp;

    // ---------------------------------------------------------------------
    // Getters & setters
    // ---------------------------------------------------------------------

    /**
    * getKey<p>
    * Get the metadata key (PK part).
    *
    * @return key
    */
    public String getKey() { return key; }

    /**
    * setKey<p>
    * Set the metadata key (PK part).
    *
    * @param key
    */
    public void setKey(String key) { this.key = key; }

    /**
    * getApplication<p>
    * Get the owning application.
    *
    * @return application
    */
    public Application getApplication() {
        LOG.info("Getting application from app metadata: {}", application);
        return application;
    }

    /**
    * setApplication<p>
    * Set the owning application (PK part).
    *
   * @param application
    */
    public void setApplication(Application application) { this.application = application; }

    /**
    * getCreationTimestamp<p>
    * Get the creation timestamp.
    *
    * @return creationTimestamp
    */
    public Date getCreationTimestamp() { return creationTimestamp; }

    /**
    * setCreationTimestamp<p>
    * Set the creation timestamp.
    *
    * @param creationTimestamp
    */
    public void setCreationTimestamp(Date creationTimestamp) { this.creationTimestamp = creationTimestamp; }

    /**
    * getValue<p>
    * Get the metadata value.
    *
    * @return value
    */
    public String getValue() { return value; }

    /**
    * setValue<p>
    * Set the metadata value.
    *
    * @param value
    */
    public void setValue(String value) { this.value = value; }

    /**
    * isMandatory<p>
    * Whether this entry is required.
    *
    * @return mandatory
    */
    public boolean isMandatory() { return mandatory; }

    /**
    * setMandatory<p>
    * Mark this entry as required or optional.
    *
    * @param mandatory
    */
    public void setMandatory(boolean mandatory) { this.mandatory = mandatory; }

    // ---------------------------------------------------------------------
    // Object methods
    // ---------------------------------------------------------------------

    /**
     * toString<p>
     * Get the string describing the current object
     * 
     * @return object string
     */
    @Override
    public String toString() { return String.format("AppMd (%s: %s)", this.key, value); }

    /**
     * equals<p>
     * Compare the current object with the given object
     * 
     * @param object
     * @return isEquals
     */
    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof ApplicationMetadata)) return false;
        ApplicationMetadata other = (ApplicationMetadata) obj;
        return Objects.equals(key, other.key) && Objects.equals(application, other.application);
    }

    /**
     * hashCode<p>
     * Get the object hashCode
     * 
     * @return hashCode
     */
    @Override
    public int hashCode() { return Objects.hash(key, application); }
}