<?php

namespace Alexr\Settings\Traits;


trait MatchesScheduleRule
{
	/**
	 * Check if a schedule-based rule (Payment, Offer, etc.) matches the given date/time.
	 *
	 * Shared matching logic over: active flag, party size range (min_guests /
	 * max_guests), weekdays, date_range, include_days, exclude_days and time slots.
	 *
	 * @param array $rule
	 * @param string $date Y-m-d
	 * @param int $time seconds from midnight
	 * @param int|null $party party size to check against min_guests / max_guests.
	 *                        When null the size check is skipped (used by callers
	 *                        that don't have party context yet).
	 *
	 * @return bool
	 */
	public function matchesScheduleRule($rule, $date, $time, $party = null)
	{
		// Check rule is active
		if (!isset($rule['active'])) return false;
		if (!$rule['active']) return false;

		// Check party size range (0 = no limit). Skipped when caller has no party.
		if ($party !== null) {
			$min_guests = isset($rule['min_guests']) ? intval($rule['min_guests']) : 0;
			$max_guests = isset($rule['max_guests']) ? intval($rule['max_guests']) : 0;
			if ($min_guests > 0 && intval($party) < $min_guests) return false;
			if ($max_guests > 0 && intval($party) > $max_guests) return false;
		}

		// To get the week day
		$day = evavel_date_createFromFormat('Y-m-d', $date);
		$dayOfWeek = $day->dayOfWeek; // 1-mon , 7-sun

		// Check weekdays
		if (!isset($rule['weekdays'])) return false;
		$rule_weekdays = $rule['weekdays'];
		$weekdays = ['sun','mon','tue','wed','thu','fri','sat', 'sun'];
		if ($rule_weekdays[ $weekdays[$dayOfWeek] ] === false) return false;

		// Check date ranges. Only apply if not empty
		if (!isset($rule['date_range'])) return false;
		$rule_dates = $rule['date_range'];
		$found_match = false;
		foreach($rule_dates as $range) {
			if(preg_match("#(.+) to (.+)#", $range, $matches)) {
				if ($matches[1] <= $date && $matches[2] >= $date) {
					$found_match = true;
				}
			}
		}
		if (!empty($rule_dates) && !$found_match) return false;

		// Check include specific dates. If not empty date should be in the list
		if (!isset($rule['include_days'])) return false;
		$include_days = $rule['include_days'];
		if (!empty($include_days)){
			if (!in_array($date, $include_days)){
				return false;
			}
		}

		// Check exclude dates. If not empty check it is not included here
		if (!isset($rule['exclude_days'])) return false;
		$exclude_days = $rule['exclude_days'];
		if (!empty($exclude_days)){
			if (in_array($date, $exclude_days)){
				return false;
			}
		}

		// Check time slot is accepted
		if (!isset($rule['slots'])) return false;
		$slots = $rule['slots'];
		foreach ($slots as $slot) {
			if ($slot['time'] == $time){
				// block=true means the slot is blocked for this rule
				return !$slot['block'];
			}
		}

		return true;
	}
}