<?php
/**
 * Tab — Availability (rules, slots, exceptions/blockings).
 *
 * @package VEFmultiBooking
 */

defined( 'ABSPATH' ) || exit;

$vefmb_resources_service = new VEFMB_Resources_Service();
$vefmb_avail_service     = new VEFMB_Availability_Service();
$vefmb_periods_service   = new VEFMB_Periods_Service();
$vefmb_notice            = '';
$vefmb_notice_type       = 'success';

if ( isset( $_SERVER['REQUEST_METHOD'] ) && 'POST' === $_SERVER['REQUEST_METHOD'] && isset( $_POST['vefmb_action'] )
	&& isset( $_POST['vefmb_availability_nonce'] )
	&& wp_verify_nonce( sanitize_key( wp_unslash( $_POST['vefmb_availability_nonce'] ) ), 'vefmb_manage_availability' )
	&& current_user_can( VEFMB_Capabilities::MANAGE_BOOKINGS )
) {
	$vefmb_post_action  = sanitize_key( wp_unslash( $_POST['vefmb_action'] ) );
	$vefmb_resource_id  = isset( $_POST['resource_id'] ) ? absint( $_POST['resource_id'] ) : 0;

	switch ( $vefmb_post_action ) {

		case 'save_rule':
			$vefmb_rule_id    = isset( $_POST['rule_id'] ) ? absint( $_POST['rule_id'] ) : 0;
			$vefmb_rule_input = array(
				'days_of_week' => isset( $_POST['days_of_week'] ) ? array_map( 'absint', (array) wp_unslash( $_POST['days_of_week'] ) ) : array(),
				'start_time'   => isset( $_POST['start_time'] ) ? sanitize_text_field( wp_unslash( $_POST['start_time'] ) ) : '',
				'end_time'     => isset( $_POST['end_time'] ) ? sanitize_text_field( wp_unslash( $_POST['end_time'] ) ) : '',
				'capacity'     => isset( $_POST['capacity'] ) ? absint( $_POST['capacity'] ) : 0,
				'valid_from'   => isset( $_POST['valid_from'] ) ? sanitize_text_field( wp_unslash( $_POST['valid_from'] ) ) : '',
				'valid_until'  => isset( $_POST['valid_until'] ) ? sanitize_text_field( wp_unslash( $_POST['valid_until'] ) ) : '',
				'frequency'    => isset( $_POST['frequency'] ) ? sanitize_key( wp_unslash( $_POST['frequency'] ) ) : 'weekly',
				'kind'         => isset( $_POST['kind'] ) ? sanitize_key( wp_unslash( $_POST['kind'] ) ) : '',
			);

			$vefmb_result = $vefmb_rule_id
				? $vefmb_avail_service->update_rule( $vefmb_rule_id, $vefmb_rule_input )
				: $vefmb_avail_service->create_rule( $vefmb_resource_id, $vefmb_rule_input );

			// Other start times typed on a new "day" rule: one more rule for each, same days, capacity and dates.
			$vefmb_more_starts = array();

			if ( ! $vefmb_rule_id && ! is_wp_error( $vefmb_result ) && 'night' !== ( $vefmb_avail_service->get_rule( (int) $vefmb_result )['kind'] ?? 'day' ) ) {
				$vefmb_typed_starts = isset( $_POST['more_start_times'] ) ? preg_split( '/[\s,;]+/', sanitize_text_field( wp_unslash( $_POST['more_start_times'] ) ), -1, PREG_SPLIT_NO_EMPTY ) : array();

				// "Every X minutes until …": the start times between the first one and the last one.
				$vefmb_every = isset( $_POST['repeat_every'] ) ? absint( $_POST['repeat_every'] ) : 0;
				$vefmb_last  = isset( $_POST['last_start'] ) ? sanitize_text_field( wp_unslash( $_POST['last_start'] ) ) : '';

				$vefmb_pause_from = isset( $_POST['pause_from'] ) ? sanitize_text_field( wp_unslash( $_POST['pause_from'] ) ) : '';
				$vefmb_pause_to   = isset( $_POST['pause_to'] ) ? sanitize_text_field( wp_unslash( $_POST['pause_to'] ) ) : '';
				$vefmb_has_pause  = preg_match( '/^([01]\d|2[0-3]):[0-5]\d$/', $vefmb_pause_from ) && preg_match( '/^([01]\d|2[0-3]):[0-5]\d$/', $vefmb_pause_to ) && $vefmb_pause_to > $vefmb_pause_from;

				if ( $vefmb_every >= 5 && preg_match( '/^([01]?\d|2[0-3]):[0-5]\d$/', $vefmb_last ) && preg_match( '/^([01]?\d|2[0-3]):[0-5]\d$/', $vefmb_rule_input['start_time'] ) ) {
					list( $vefmb_h, $vefmb_m ) = array_map( 'intval', explode( ':', $vefmb_rule_input['start_time'] ) );
					list( $vefmb_lh, $vefmb_lm ) = array_map( 'intval', explode( ':', $vefmb_last ) );
					$vefmb_end_min = $vefmb_lh * 60 + $vefmb_lm;

					for ( $vefmb_min = $vefmb_h * 60 + $vefmb_m + $vefmb_every, $vefmb_count = 0; $vefmb_min <= $vefmb_end_min && $vefmb_count < 60; $vefmb_min += $vefmb_every, ++$vefmb_count ) {
						$vefmb_candidate = sprintf( '%02d:%02d', intdiv( $vefmb_min, 60 ), $vefmb_min % 60 );

						// A departure that falls in the break is not created.
						if ( $vefmb_has_pause && $vefmb_candidate >= $vefmb_pause_from && $vefmb_candidate < $vefmb_pause_to ) {
							continue;
						}

						$vefmb_typed_starts[] = $vefmb_candidate;
					}
				}

				foreach ( $vefmb_typed_starts as $vefmb_more_start ) {
					if ( preg_match( '/^([01]?\d|2[0-3]):[0-5]\d$/', $vefmb_more_start ) ) {
						$vefmb_more_starts[ str_pad( $vefmb_more_start, 5, '0', STR_PAD_LEFT ) ] = true;
					}
				}

				unset( $vefmb_more_starts[ $vefmb_rule_input['start_time'] ] );

				foreach ( array_keys( $vefmb_more_starts ) as $vefmb_more_start ) {
					$vefmb_more_result = $vefmb_avail_service->create_rule( $vefmb_resource_id, array_merge( $vefmb_rule_input, array( 'start_time' => $vefmb_more_start, 'end_time' => '' ) ) );

					if ( is_wp_error( $vefmb_more_result ) ) {
						$vefmb_result = $vefmb_more_result;
						break;
					}
				}
			}

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} elseif ( $vefmb_rule_id ) {
				$vefmb_notice = __( 'Rule updated. Slots already generated are unchanged — generate slots again to apply the new values.', 'vefmultibooking' );
			} elseif ( $vefmb_more_starts ) {
				/* translators: %d: number of rules created */
				$vefmb_notice = sprintf( _n( '%d rule created.', '%d rules created.', count( $vefmb_more_starts ) + 1, 'vefmultibooking' ), count( $vefmb_more_starts ) + 1 );
			} else {
				$vefmb_notice = __( 'Rule created.', 'vefmultibooking' );
			}

			if ( ! is_wp_error( $vefmb_result ) ) {
				$vefmb_notice .= VEFMB_Admin_UI::mode_note( $vefmb_avail_service->align_resource_mode( $vefmb_resource_id, '' !== $vefmb_rule_input['kind'] ? $vefmb_rule_input['kind'] : ( $vefmb_rule_id ? ( $vefmb_avail_service->get_rule( $vefmb_rule_id )['kind'] ?? 'day' ) : 'day' ) ) );
			}
			break;

		case 'duplicate_rule':
			$vefmb_result = $vefmb_avail_service->duplicate_rule( isset( $_POST['rule_id'] ) ? absint( $_POST['rule_id'] ) : 0 );

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice      = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				$vefmb_notice = __( 'Rule duplicated. The copy is inactive until you activate it.', 'vefmultibooking' );
			}
			break;

		case 'update_slot_capacity':
			$vefmb_result = $vefmb_avail_service->update_slot(
				isset( $_POST['slot_id'] ) ? absint( $_POST['slot_id'] ) : 0,
				array( 'capacity_total' => isset( $_POST['capacity_total'] ) ? absint( $_POST['capacity_total'] ) : 0 )
			);

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice      = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				$vefmb_notice = __( 'Slot capacity updated.', 'vefmultibooking' );
			}
			break;

		case 'save_period':
			$vefmb_period_id    = isset( $_POST['period_id'] ) ? absint( $_POST['period_id'] ) : 0;
			$vefmb_period_input = array(
				'name'          => isset( $_POST['period_name'] ) ? sanitize_text_field( wp_unslash( $_POST['period_name'] ) ) : '',
				'start_date'    => isset( $_POST['period_start'] ) ? sanitize_text_field( wp_unslash( $_POST['period_start'] ) ) : '',
				'end_date'      => isset( $_POST['period_end'] ) ? sanitize_text_field( wp_unslash( $_POST['period_end'] ) ) : '',
				'repeat_yearly' => ! empty( $_POST['period_repeat_yearly'] ),
			);

			$vefmb_result = $vefmb_period_id
				? $vefmb_periods_service->update_period( $vefmb_period_id, $vefmb_period_input )
				: $vefmb_periods_service->create_period( $vefmb_resource_id, $vefmb_period_input );

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice      = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				$vefmb_notice = $vefmb_period_id ? __( 'Period updated. Slots already generated are unchanged.', 'vefmultibooking' ) : __( 'Period created.', 'vefmultibooking' );
			}
			break;

		case 'duplicate_period':
			$vefmb_result = $vefmb_periods_service->duplicate_period( isset( $_POST['period_id'] ) ? absint( $_POST['period_id'] ) : 0 );

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice      = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				$vefmb_notice = __( 'Period duplicated. The copy is inactive until you activate it.', 'vefmultibooking' );
			}
			break;

		case 'toggle_period_status':
			$vefmb_periods_service->set_status(
				isset( $_POST['period_id'] ) ? absint( $_POST['period_id'] ) : 0,
				isset( $_POST['new_status'] ) ? sanitize_key( wp_unslash( $_POST['new_status'] ) ) : ''
			);
			$vefmb_notice = __( 'Period status updated.', 'vefmultibooking' );
			break;

		case 'delete_period':
			$vefmb_periods_service->delete_period( isset( $_POST['period_id'] ) ? absint( $_POST['period_id'] ) : 0 );
			$vefmb_notice = __( 'Period deleted.', 'vefmultibooking' );
			break;

		case 'toggle_rule_status':
			$vefmb_avail_service->set_rule_status(
				isset( $_POST['rule_id'] ) ? absint( $_POST['rule_id'] ) : 0,
				isset( $_POST['new_status'] ) ? sanitize_key( wp_unslash( $_POST['new_status'] ) ) : ''
			);
			$vefmb_notice = __( 'Rule status updated.', 'vefmultibooking' );
			break;

		case 'delete_rule':
			$vefmb_avail_service->delete_rule( isset( $_POST['rule_id'] ) ? absint( $_POST['rule_id'] ) : 0 );
			$vefmb_notice = __( 'Rule deleted. Slots already generated remain in place.', 'vefmultibooking' );
			break;

		case 'save_slots_ahead':
			VEFMB_Settings::update( array( 'slots_ahead_months' => max( 1, min( 36, isset( $_POST['slots_ahead_months'] ) ? absint( $_POST['slots_ahead_months'] ) : 12 ) ) ) );
			$vefmb_created = $vefmb_avail_service->generate_all_ahead();
			/* translators: %d: number of slots created */
			$vefmb_notice  = sprintf( _n( 'Saved. %d slot created.', 'Saved. %d slots created.', $vefmb_created, 'vefmultibooking' ), $vefmb_created );
			break;

		case 'generate_slots':
			$vefmb_rule_id = isset( $_POST['rule_id'] ) ? absint( $_POST['rule_id'] ) : 0;
			$vefmb_until   = isset( $_POST['until_date'] ) ? sanitize_text_field( wp_unslash( $_POST['until_date'] ) ) : '';
			$vefmb_result  = $vefmb_avail_service->generate_slots_from_rule( $vefmb_rule_id, $vefmb_until );

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				/* translators: %d: number of slots created */
				/* translators: %d: number of slots */
				$vefmb_notice = sprintf( _n( '%d slot generated.', '%d slots generated.', $vefmb_result, 'vefmultibooking' ), $vefmb_result );
			}
			break;

		case 'save_slot':
			$vefmb_result = $vefmb_avail_service->create_slot(
				$vefmb_resource_id,
				array(
					'slot_date'      => isset( $_POST['slot_date'] ) ? sanitize_text_field( wp_unslash( $_POST['slot_date'] ) ) : '',
					'start_time'     => isset( $_POST['start_time'] ) ? sanitize_text_field( wp_unslash( $_POST['start_time'] ) ) : '',
					'end_time'       => isset( $_POST['end_time'] ) ? sanitize_text_field( wp_unslash( $_POST['end_time'] ) ) : '',
					'capacity_total' => isset( $_POST['capacity_total'] ) ? absint( $_POST['capacity_total'] ) : 0,
					'kind'           => isset( $_POST['kind'] ) ? sanitize_key( wp_unslash( $_POST['kind'] ) ) : '',
				)
			);

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				$vefmb_notice  = __( 'Slot created.', 'vefmultibooking' );
				$vefmb_notice .= VEFMB_Admin_UI::mode_note( $vefmb_avail_service->align_resource_mode( $vefmb_resource_id, isset( $_POST['kind'] ) && 'night' === sanitize_key( wp_unslash( $_POST['kind'] ) ) ? 'night' : 'day' ) );
			}
			break;

		case 'confirm_activity':
			$vefmb_participants_service = new VEFMB_Participants_Service();
			$vefmb_confirm_slot_id      = isset( $_POST['slot_id'] ) ? absint( $_POST['slot_id'] ) : 0;

			if ( $vefmb_participants_service->confirm_slot( $vefmb_confirm_slot_id ) ) {
				$vefmb_notice = __( 'Activity confirmed. The customers who had not paid yet received a payment link.', 'vefmultibooking' );
			} else {
				$vefmb_notice      = __( 'This activity could not be confirmed.', 'vefmultibooking' );
				$vefmb_notice_type = 'error';
			}
			break;

		case 'cancel_activity':
			$vefmb_cancelled_count = ( new VEFMB_Participants_Service() )->cancel_slot( isset( $_POST['slot_id'] ) ? absint( $_POST['slot_id'] ) : 0 );
			/* translators: %d: number of bookings cancelled */
			$vefmb_notice = sprintf( _n( 'Activity cancelled. %d booking was cancelled and its customer told by email.', 'Activity cancelled. %d bookings were cancelled and their customers told by email.', $vefmb_cancelled_count, 'vefmultibooking' ), $vefmb_cancelled_count );
			break;

		case 'toggle_slot_status':
			$vefmb_avail_service->set_slot_status(
				isset( $_POST['slot_id'] ) ? absint( $_POST['slot_id'] ) : 0,
				isset( $_POST['new_status'] ) ? sanitize_key( wp_unslash( $_POST['new_status'] ) ) : ''
			);
			$vefmb_notice = __( 'Slot status updated.', 'vefmultibooking' );
			break;

		case 'delete_slot':
			$vefmb_avail_service->delete_slot( isset( $_POST['slot_id'] ) ? absint( $_POST['slot_id'] ) : 0 );
			$vefmb_notice = __( 'Slot deleted.', 'vefmultibooking' );
			break;

		case 'block_period':
			$vefmb_result = $vefmb_avail_service->block_period(
				$vefmb_resource_id,
				isset( $_POST['block_from'] ) ? sanitize_text_field( wp_unslash( $_POST['block_from'] ) ) : '',
				isset( $_POST['block_to'] ) ? sanitize_text_field( wp_unslash( $_POST['block_to'] ) ) : '',
				isset( $_POST['block_reason'] ) ? sanitize_text_field( wp_unslash( $_POST['block_reason'] ) ) : '',
				! empty( $_POST['unit_id'] ) ? absint( $_POST['unit_id'] ) : null,
				isset( $_POST['block_time_from'] ) ? sanitize_text_field( wp_unslash( $_POST['block_time_from'] ) ) : '',
				isset( $_POST['block_time_to'] ) ? sanitize_text_field( wp_unslash( $_POST['block_time_to'] ) ) : ''
			);

			if ( is_wp_error( $vefmb_result ) ) {
				$vefmb_notice = $vefmb_result->get_error_message();
				$vefmb_notice_type = 'error';
			} else {
				/* translators: %d: number of days blocked */
				/* translators: %d: number of days */
				$vefmb_notice = sprintf( _n( '%d day blocked.', '%d days blocked.', $vefmb_result, 'vefmultibooking' ), $vefmb_result );
			}
			break;

		case 'bulk_slots':
			$vefmb_bulk_action = isset( $_POST['bulk_action'] ) ? sanitize_key( wp_unslash( $_POST['bulk_action'] ) ) : '';
			$vefmb_bulk_ids    = isset( $_POST['slot_ids'] ) ? array_map( 'absint', (array) wp_unslash( $_POST['slot_ids'] ) ) : array();

			if ( ! in_array( $vefmb_bulk_action, array( 'close', 'open', 'delete', 'capacity' ), true ) || empty( $vefmb_bulk_ids ) ) {
				$vefmb_notice      = __( 'Tick the slots to change, then choose an action.', 'vefmultibooking' );
				$vefmb_notice_type = 'error';
				break;
			}

			$vefmb_bulk = $vefmb_avail_service->bulk_slots( $vefmb_resource_id, $vefmb_bulk_ids, $vefmb_bulk_action, isset( $_POST['bulk_capacity'] ) ? absint( $_POST['bulk_capacity'] ) : 0 );
			/* translators: %d: number of slots changed */
			$vefmb_notice = sprintf( _n( '%d slot changed.', '%d slots changed.', $vefmb_bulk['done'], 'vefmultibooking' ), $vefmb_bulk['done'] );

			if ( $vefmb_bulk['skipped'] > 0 ) {
				/* translators: %d: number of slots left unchanged */
				$vefmb_notice     .= ' ' . sprintf( _n( '%d slot was left as it was (it has bookings, or the change is not possible).', '%d slots were left as they were (they have bookings, or the change is not possible).', $vefmb_bulk['skipped'], 'vefmultibooking' ), $vefmb_bulk['skipped'] );
				$vefmb_notice_type = 'warning';
			}
			break;

		case 'remove_schedules':
			$vefmb_removed = $vefmb_avail_service->remove_rules( $vefmb_resource_id, isset( $_POST['rule_ids'] ) ? array_map( 'absint', explode( ',', sanitize_text_field( wp_unslash( $_POST['rule_ids'] ) ) ) ) : array() );
			/* translators: %d: number of opening times removed */
			$vefmb_notice = sprintf( _n( '%d opening time removed.', '%d opening times removed.', $vefmb_removed, 'vefmultibooking' ), $vefmb_removed );
			break;

		case 'remove_closures':
			$vefmb_removed = 0;

			foreach ( isset( $_POST['exception_ids'] ) ? array_map( 'absint', explode( ',', sanitize_text_field( wp_unslash( $_POST['exception_ids'] ) ) ) ) : array() as $vefmb_exc_id ) {
				$vefmb_exc = ( new VEFMB_Availability_Exceptions_Repository() )->get( $vefmb_exc_id );

				if ( $vefmb_exc && (int) $vefmb_exc['resource_id'] === $vefmb_resource_id && $vefmb_avail_service->delete_exception( $vefmb_exc_id ) ) {
					++$vefmb_removed;
				}
			}

			/* translators: %d: number of days reopened */
			$vefmb_notice = sprintf( _n( 'Closure removed (%d day).', 'Closure removed (%d days).', $vefmb_removed, 'vefmultibooking' ), $vefmb_removed );
			break;

		case 'delete_exception':
			$vefmb_avail_service->delete_exception( isset( $_POST['exception_id'] ) ? absint( $_POST['exception_id'] ) : 0 );
			$vefmb_notice = __( 'Exception deleted.', 'vefmultibooking' );
			break;
	}
}

// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only, only selects the view being displayed.
$vefmb_view = isset( $_GET['view'] ) ? sanitize_key( wp_unslash( $_GET['view'] ) ) : 'picker';
// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- read-only.
$vefmb_resource_id_get = isset( $_GET['resource_id'] ) ? absint( $_GET['resource_id'] ) : 0;
?>
<div class="vefmb-panel" id="vefmb-panel-availability">

	<?php if ( '' !== $vefmb_notice ) : ?>
		<div class="notice notice-<?php echo esc_attr( $vefmb_notice_type ); ?> is-dismissible" id="vefmb-availability-notice">
			<p><?php echo esc_html( $vefmb_notice ); ?></p>
		</div>
	<?php endif; ?>

	<?php
	if ( 'manage' === $vefmb_view && $vefmb_resource_id_get ) {
		require VEFMB_PLUGIN_DIR . 'includes/admin/views/partials/availability-manage.php';
	} else {
		require VEFMB_PLUGIN_DIR . 'includes/admin/views/partials/availability-picker.php';
	}
	?>
</div>