<?php

class AGC_Carousel {
	private $buffer;
	private $cryptoId;
	private $currentIndex;
	public function __construct($cryptoId) {		
		$this->cryptoId = $cryptoId;

		$repo = new AGC_Carousel_Repo();
		$this->buffer = $repo->get_buffer($cryptoId);
		$this->currentIndex = $repo->get_index($cryptoId);
	}

	public function get_next_address() {
		AGC_Util::log(__FILE__, __LINE__, 'Getting next carousel address!');
		$nextAddress = $this->buffer[$this->currentIndex];

		while (!AGC_Cryptocurrencies::is_valid_wallet_address($this->cryptoId, $nextAddress)) {
			
			$this->increment_current_index();
				
			$nextAddress = $this->buffer[$this->currentIndex];
		}

		$this->increment_current_index();		
		$repo = new AGC_Carousel_Repo();
		$repo->set_index($this->cryptoId, $this->currentIndex);
		return $nextAddress;
	}

	private function increment_current_index() {
		AGC_Util::log(__FILE__, __LINE__, 'Incrementing current index: ' . $this->currentIndex);
		if ($this->currentIndex >= 0 && $this->currentIndex <= 3) {
			$this->currentIndex = $this->currentIndex + 1;
		}
		elseif ($this->currentIndex == 4) {
			$this->currentIndex = 0;
		}
		else {
			AGC_Util::log(__FILE__, __LINE__, 'Invalid current index! Something went wrong, please contact plugin support.');
		}
	}
}

?>