<?php

namespace Nest\Database\Migrations\Diff;

/**
 * Table foreign key configurator.
 */
class TableForeignKey
{
	/**
	 * Foreign key columns.
	 * @var string[]
	 */
	public array $columns = [];

	/**
	 * Referenced table.
	 * @var string
	 */
	public string $referencedTable;

	/**
	 * Referenced columns.
	 * @var string[]
	 */
	public array $referencedColumns;

	/**
	 * Action on delete.
	 * @var string
	 */
	public string $onDelete;
	/**
	 * Action on update.
	 * @var string
	 */
	public string $onUpdate;

	/**
	 * Create a new table foreign key.
	 * @param Table $table Table of the foreign key.
	 */
	public function __construct(public readonly Table $table)
	{
	}

	/**
	 * Add foreign key columns.
	 * @param string ...$columns Foreign key columns.
	 * @return $this
	 */
	public function columns(string ...$columns): static
	{
		array_push($this->columns, ...$columns);
		return $this;
	}

	/**
	 * Set referenced table and columns..
	 * @param string $referencedTable Referenced table name.
	 * @param string[] $referencedColumns Referenced columns in table.
	 * @return $this
	 */
	public function references(string $referencedTable, string ...$referencedColumns): static
	{
		$this->referencedTable = $referencedTable;
		$this->referencedColumns = $referencedColumns;

		return $this;
	}

	/**
	 * Set action on delete.
	 * @param string $referentialAction Raw action.
	 * @return $this
	 */
	public function onDelete(string $referentialAction): static
	{
		$this->onDelete = $referentialAction;
		return $this;
	}

	/**
	 * Set action on update.
	 * @param string $referentialAction Raw action.
	 * @return $this
	 */
	public function onUpdate(string $referentialAction): static
	{
		$this->onUpdate = $referentialAction;
		return $this;
	}

	/**
	 * Create the defined foreign key.
	 * @return void
	 */
	public function create(): void
	{
		$this->table->getDatabase()->getQueriesAdapter()->createForeignKey($this);
	}
}