<?php

if ( ! defined( 'ABSPATH' ) ) {
	die( 'You are not allowed to call this page directly.' );
}

class FrmProEntry {

	/**
	 * @since 4.0
	 * @param int $id
	 */
	public static function admin_edit_link( $id ) {
		$link = admin_url( 'admin.php?page=formidable-entries&frm_action=edit&id=' . absint( $id ) );
		return $link;
	}

	public static function validate( $params, $fields, $form, $title, $description ) {
		global $frm_vars;

		$frm_settings = FrmAppHelper::get_settings();

		$has_another_page = ( $_POST && isset( $_POST[ 'frm_page_order_' . $form->id ] ) );
		$switching_pages  = ( $has_another_page || FrmProFormsHelper::going_to_prev( $form->id ) );
		$entry_id         = FrmFormsController::just_created_entry( $form->id );
		$args             = compact( 'fields', 'form', 'title', 'description', 'entry_id' );

		if ( $switching_pages && ! FrmProFormsHelper::saving_draft() ) {

			$autosave = FrmAppHelper::get_post_param( 'frm_autosaving', '', 'absint' );
			if ( $autosave && $entry_id ) {
				// load next page of draft entry
				$args['function'] = 'show_form_after_first_save_draft_click';
				self::show_entry_for_edit( $args );
			} else {
				$title       = FrmProFormState::get_from_request( 'title', $title );
				$description = FrmProFormState::get_from_request( 'description', $description );

				// load next page for new entry
				$errors = '';
				$submit = isset( $form->options['submit_value'] ) ? $form->options['submit_value'] : $frm_settings->submit_value;
				$values = $fields ? FrmEntriesHelper::setup_new_vars( $fields, $form ) : array();

				require FrmAppHelper::plugin_path() . '/classes/views/frm-entries/new.php';
				add_filter( 'frm_continue_to_create', '__return_false' );
			}
		} elseif ( $entry_id && $form->editable && FrmProFormsHelper::check_single_entry_type( $form->options, 'user' ) && ! FrmProFormsHelper::saving_draft() ) {
			$show_form = isset( $form->options['show_form'] ) ? $form->options['show_form'] : true;

			if ( $show_form ) {
				$saved_message = isset( $form->options['success_msg'] ) ? $form->options['success_msg'] : $frm_settings->success_msg;
				$saved_message = apply_filters( 'frm_content', $saved_message, $form, $entry_id );
				$message       = wpautop( do_shortcode( $saved_message ) );
				$message       = '<div class="frm_message" id="message">' . $message . '</div>';

				$args['message']  = $message;
				$args['function'] = 'show_form_after_single_editable_entry_submission';

				self::show_entry_for_edit( $args );
			}
		} elseif ( FrmProFormsHelper::saving_draft() && $entry_id ) {
			$saved_message = '';
			FrmProFormsHelper::save_draft_msg( $saved_message, $form, $entry_id );
			$message = FrmFormsHelper::get_success_message(
				array(
					'message'  => $saved_message,
					'form'     => $form,
					'entry_id' => $entry_id,
					'class'    => 'frm_message',
				)
			);

			$args['message']  = $message;
			$args['function'] = 'show_form_after_first_save_draft_click';

			self::show_entry_for_edit( $args );
		}
	}

	/**
	 * @param array $args
	 * @return void
	 */
	private static function show_entry_for_edit( $args ) {
		$values = array(
			'fields'           => $args['fields'],
			'form'             => $args['form'],
			'show_title'       => $args['title'],
			'show_description' => $args['description'],
			'conf_message'     => isset( $args['message'] ) ? $args['message'] : '',
		);

		$function = $args['function'];
		FrmProEntriesController::$function( $args['entry_id'], $values );

		add_filter( 'frm_continue_to_create', '__return_false' );
	}

	/**
	 * This function is called from two hooks: frm_pre_create_entry and frm_pre_update_entry
	 * When frm_pre_update_entry is called from FrmEntry::before_update_entry the entry id is passed as $action
	 */
	public static function save_sub_entries( $values, $action = 'create' ) {
		$form_id = isset( $values['form_id'] ) ? (int) $values['form_id'] : 0;
		if ( ! $form_id || ! isset( $values['item_meta'] ) ) {
			return $values;
		}

		// if $action is an entry id, set $values['id'] and change $action to 'update'
		if ( is_numeric( $action ) && ! isset( $values['id'] ) ) {
			$values['id'] = $action;
			$action       = 'update';
		}

		$form_fields    = FrmProFormsHelper::has_field( 'form', $form_id, false );
		$section_fields = FrmProFormsHelper::has_field( 'divider', $form_id, false );

		if ( ! $form_fields && ! $section_fields ) {
			// only continue if there could be sub entries
			return $values;
		}

		$form_fields = array_merge( $section_fields, $form_fields );

		$new_values = $values;
		unset( $new_values['item_meta'], $new_values['item_key'] );

		// Allow for multiple embedded forms.
		foreach ( $form_fields as $field ) {
			if ( ! isset( $values['item_meta'][ $field->id ] ) || ! isset( $field->field_options['form_select'] ) || ! isset( $values['item_meta'][ $field->id ]['form'] ) ) {
				// don't continue if we don't know which form to insert the sub entries into

				self::delete_all_sub_entries( $action, $values, $field->id );
				unset( $values['item_meta'][ $field->id ] );

				continue;
			}

			if ( 'divider' === $field->type && ! FrmField::is_repeating_field( $field ) ) {
				// only create sub entries for repeatable sections
				continue;
			}

			self::save_sub_entry( $field, $action, $new_values, $values );

			unset( $field );
		}

		return $values;
	}

	/**
	 * @since 4.04.04
	 *
	 * @param stdClass $field
	 * @param string   $action
	 * @param array    $new_values
	 * @param array    $values
	 * @return void
	 */
	public static function save_sub_entry( $field, $action, $new_values, &$values ) {
		$form_id      = isset( $values['form_id'] ) ? (int) $values['form_id'] : 0;
		$field_values = $values['item_meta'][ $field->id ];

		$sub_form_id = $field->field_options['form_select'];

		if ( $action !== 'create' ) {
			$old_ids = self::get_existing_sub_entries( $values['id'], $field->id );
		} else {
			$old_ids = array();
		}

		if ( is_array( $field_values ) ) {
			unset( $field_values['form'], $field_values['row_ids'] );
		}

		$sub_ids = array();

		foreach ( $field_values as $k => $v ) {
			$has_values = array_filter( $v, array( 'FrmProContent', 'is_not_empty' ) );
			if ( empty( $has_values ) ) {
				// Don't create empty entries.
				continue;
			}

			$entry_values                   = $new_values;
			$entry_values['form_id']        = $sub_form_id;
			$entry_values['item_meta']      = (array) $v;
			$entry_values['parent_item_id'] = isset( $values['id'] ) ? $values['id'] : 0;
			$entry_values['parent_form_id'] = $form_id;
			// include a nonce just to be sure the parent_form_id is legit
			$entry_values['parent_nonce'] = wp_create_nonce( 'parent' );

			// set values for later use (file upload and tags fields)
			$_POST['item_meta']['key_pointer']  = $k;
			$_POST['item_meta']['parent_field'] = $field->id;

			if ( ! is_numeric( $k ) && in_array( str_replace( 'i', '', $k ), $old_ids ) ) {
				// update existing sub entries
				$sub_id             = str_replace( 'i', '', $k );
				$entry_values['id'] = $sub_id;
				FrmEntry::update( $entry_values['id'], $entry_values );
			} else {
				// create new sub entries
				$sub_id = FrmEntry::create( $entry_values );
			}

			if ( $sub_id ) {
				$sub_ids[] = $sub_id;
			}

			unset( $k, $v, $entry_values, $sub_id );
		}

		$values['item_meta'][ $field->id ] = $sub_ids; // array of sub entry ids

		$old_ids = array_diff( $old_ids, $sub_ids );
		self::delete_sub_entries( $old_ids );
	}

	/**
	 * Delete the sub entries that have been removed
	 *
	 * @since 2.03.05
	 *
	 * @param string $action
	 * @param array $values
	 * @param int|string $field_id
	 */
	private static function delete_all_sub_entries( $action, $values, $field_id ) {
		if ( $action !== 'create' && isset( $values['id'] ) ) {
			$old_ids = self::get_existing_sub_entries( $values['id'], $field_id );
			self::delete_sub_entries( $old_ids );
		}
	}

	/**
	 * Get the existing sub entries
	 *
	 * @since 2.03.05
	 *
	 * @param int|string $entry_id
	 * @param int|string $section_id
	 * @return array $old_ids
	 */
	private static function get_existing_sub_entries( $entry_id, $section_id ) {
		$old_ids = FrmEntryMeta::get_entry_meta_by_field( $entry_id, $section_id );
		if ( $old_ids ) {
			$old_ids = array_filter( (array) $old_ids, 'is_numeric' );
		} else {
			$old_ids = array();
		}

		return $old_ids;
	}


	/**
	 * Delete entries that were removed from section
	 *
	 * @since 2.03.05
	 *
	 * @param array $child_entry_ids
	 */
	private static function delete_sub_entries( $child_entry_ids ) {
		if ( ! empty( $child_entry_ids ) ) {

			foreach ( $child_entry_ids as $old_id ) {
				FrmEntry::destroy( $old_id );
			}
		}
	}

	/**
	 * After an entry is duplicated, also duplicate the sub entries
	 *
	 * @since 2.0
	 */
	public static function duplicate_sub_entries( $entry_id, $form_id, $args ) {
		$form_fields    = FrmProFormsHelper::has_field( 'form', $form_id, false );
		$section_fields = FrmProFormsHelper::has_repeat_field( $form_id, false );
		$form_fields    = array_merge( $section_fields, $form_fields );
		if ( empty( $form_fields ) ) {
			// there are no fields for child entries
			return;
		}

		$entry = FrmEntry::getOne( $entry_id, true );

		$sub_ids = array();
		foreach ( $form_fields as $field ) {
			if ( ! isset( $entry->metas[ $field->id ] ) ) {
				continue;
			}

			$field_ids = array();
			$ids       = $entry->metas[ $field->id ];
			FrmProAppHelper::unserialize_or_decode( $ids );
			if ( ! empty( $ids ) ) {
				// duplicate all entries for this field
				foreach ( (array) $ids as $sub_id ) {
					$field_ids[] = FrmEntry::duplicate( $sub_id );
					unset( $sub_id );
				}

				FrmEntryMeta::update_entry_meta( $entry_id, $field->id, null, $field_ids );
				$sub_ids = array_merge( $field_ids, $sub_ids );
			}

			unset( $field, $field_ids );
		}

		if ( ! empty( $sub_ids ) ) {
			// update the parent id for new entries
			global $wpdb;
			$where = array( 'id' => $sub_ids );
			FrmDb::get_where_clause_and_values( $where );
			array_unshift( $where['values'], $entry_id );

			// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
			$wpdb->query( $wpdb->prepare( 'UPDATE ' . $wpdb->prefix . 'frm_items SET parent_item_id = %d ' . $where['where'], $where['values'] ) );
		}
	}

	/**
	 * After the sub entry and parent entry are created, we can update the parent id field
	 *
	 * @since 2.0
	 *
	 * @param int|string $entry_id
	 * @param int|string $form_id
	 * @return void
	 */
	public static function update_parent_id( $entry_id, $form_id ) {
		$form_fields    = FrmProFormsHelper::has_field( 'form', $form_id, false );
		$section_fields = FrmProFormsHelper::has_repeat_field( $form_id, false );

		if ( ! $form_fields && ! $section_fields ) {
			return;
		}

		$form_fields = array_merge( $section_fields, $form_fields );
		$entry       = FrmEntry::getOne( $entry_id, true );

		if ( ! $entry || $entry->form_id != $form_id ) {
			return;
		}

		$sub_ids = array();
		foreach ( $form_fields as $field ) {
			if ( ! isset( $entry->metas[ $field->id ] ) ) {
				continue;
			}

			$ids = $entry->metas[ $field->id ];
			FrmProAppHelper::unserialize_or_decode( $ids );
			if ( ! empty( $ids ) ) {
				$sub_ids = array_merge( $ids, $sub_ids );
			}

			unset( $field );
		}

		if ( ! empty( $sub_ids ) ) {
			$where = array( 'id' => $sub_ids );
			FrmDb::get_where_clause_and_values( $where );
			array_unshift( $where['values'], $entry_id );

			global $wpdb;
			// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
			$wpdb->query( $wpdb->prepare( 'UPDATE ' . $wpdb->prefix . 'frm_items SET parent_item_id = %d' . $where['where'], $where['values'] ) );
		}
	}

	/**
	 * @param bool $meta
	 * @return array
	 */
	public static function get_sub_entries( $entry_id, $meta = false ) {
		$entries = FrmEntry::getAll( array( 'parent_item_id' => $entry_id ), '', '', $meta, false );
		return $entries;
	}

	/**
	 * Modify values just before creating entry or saving form
	 *
	 * @since 2.0
	 *
	 * @param array|false $values - posted values
	 * @param string $location If Other vals are not cleared by JavaScript when selection is changed, value should be cleared in this function. Other vals are not cleared with JavaScript on the back-end.
	 * @return array $values
	 */
	public static function mod_other_vals( $values = false, $location = 'front' ) {
		$set_post = false;
		if ( ! $values ) {
			$values   = $_POST;
			$set_post = true;
		}

		// Modify posted confirmation values as well
		self::mod_conf_vals( $values, $location, $set_post );

		if ( ! isset( $values['item_meta']['other'] ) ) {
			return $values;
		}

		$other_array = (array) $values['item_meta']['other'];
		foreach ( $other_array as $f_id => $o_val ) {
			// For checkboxes and multi-select dropdowns
			if ( is_array( $o_val ) ) {
				if ( $location === 'back' ) {
					// Check if "other" item was selected. If not, remove other text string from saved array
					foreach ( $o_val as $opt_key => $saved_val ) {
						if ( $saved_val && ! empty( $values['item_meta'][ $f_id ][ $opt_key ] ) ) {
							$values['item_meta'][ $f_id ][ $opt_key ] = $saved_val;
						}
						unset( $opt_key, $saved_val );
					}
				} elseif ( isset( $values['item_meta'][ $f_id ] ) ) {
					$values['item_meta'][ $f_id ] = array_merge( (array) $values['item_meta'][ $f_id ], $o_val );
				}

			//For radio buttons and regular dropdowns
			} elseif ( $o_val ) {
				if ( $location === 'back' && ! empty( $values['item_meta'][ $f_id ] ) ) {
					$field = FrmField::getOne( $f_id );

					if ( $field ) {
						// Get array key for Other option
						$other_key = array_filter( array_keys( $field->options ), 'is_string' );
						$other_key = reset( $other_key );

						// Check if the Other option is selected. If so, set the value in text field.
						if ( $values['item_meta'][ $f_id ] == $field->options[ $other_key ] ) {
							$values['item_meta'][ $f_id ] = $o_val;
						}
					}
				} else {
					$values['item_meta'][ $f_id ] = $o_val;
				}
			}
			unset( $f_id, $o_val );
		}
		unset( $values['item_meta']['other'] );

		// Modify post values directly, if needed
		if ( $set_post ) {
			$_POST['item_meta'] = $values['item_meta'];
		}

		return $values;
	}

	/**
	 * Modify posted values for Confirmation fields just before creating or updating entry
	 *
	 * @since 2.0
	 *
	 * @param array  $values - posted values
	 * @param string $location
	 * @param bool   $set_post
	 * @return void
	 */
	public static function mod_conf_vals( &$values, $location, $set_post = false ) {
		// Check if we are saving or creating an entry
		if ( $location !== 'front' || ! isset( $values['item_meta'] ) ) {
			return;
		}

		// Check for posted confirmation field values and delete them
		foreach ( $values['item_meta'] as $key => $val ) {
			if ( strpos( $key, 'conf_' ) !== false ) {
				unset( $values['item_meta'][ $key ] );
			}
		}

		// Modify post values directly, if needed
		if ( $set_post ) {
			$_POST['item_meta'] = $values['item_meta'];
		}
	}

	/**
	 * @param array $query
	 * @param array $args
	 * @return void
	 */
	private static function prepare_entries_query( &$query, &$args ) {
		if ( in_array( 'rand', $args['order_by_array'], true ) ) {
			//If random is set, set the order to random
			$query['order'] = ' ORDER BY RAND()';
			return;
		}

		//Remove other ordering fields if created_at or updated_at is selected for first ordering field
		if ( reset( $args['order_by_array'] ) === 'created_at' || reset( $args['order_by_array'] ) === 'updated_at' ) {
			foreach ( $args['order_by_array'] as $o_key => $order_by_field ) {
				if ( is_numeric( $order_by_field ) ) {
					unset( $args['order_by_array'][ $o_key ] );
					unset( $args['order_array'][ $o_key ] );
				}
			}
			$numeric_order_array = array();
		} else {
		//Get number of fields in $args['order_by_array'] - this will not include created_at, updated_at, or random
			$numeric_order_array = array_filter( $args['order_by_array'], 'is_numeric' );
		}

		if ( ! count( $numeric_order_array ) ) {
			//If ordering by creation date and/or update date without any fields
			$query['order'] = ' ORDER BY';

			foreach ( $args['order_by_array'] as $o_key => $order_by ) {
				FrmDb::esc_order_by( $args['order_array'][ $o_key ] );
				$query['order'] .= ' it.' . sanitize_title( $order_by ) . ' ' . $args['order_array'][ $o_key ] . ', ';
				unset( $order_by );
			}
			return;
		}

		//If ordering by at least one field (not just created_at, updated_at, or entry ID)
		$order_fields = array();
		foreach ( $args['order_by_array'] as $o_key => $order_by_field ) {
			if ( is_numeric( $order_by_field ) ) {
				$order_fields[ $o_key ] = FrmField::getOne( $order_by_field );
			} else {
				$order_fields[ $o_key ] = $order_by_field;
			}
		}

		//Get all post IDs for this form
		$linked_posts = array();
		foreach ( $args['posts'] as $post_meta ) {
			$linked_posts[ $post_meta->post_id ] = $post_meta->id;
		}

		$first_order    = true;
		$query['order'] = 'ORDER BY ';
		foreach ( $order_fields as $o_key => $o_field ) {
			self::prepare_ordered_entries_query( $query, $args, $o_key, $o_field, $first_order );
			$first_order = false;
			unset( $o_field );
		}
	}

	/**
	 * @param array  $query
	 * @param array  $args
	 * @param string $o_key
	 * @param object $o_field
	 * @param bool   $first_order
	 * @return void
	 */
	private static function prepare_ordered_entries_query( &$query, &$args, $o_key, $o_field, $first_order ) {
		global $wpdb;

		$order = $args['order_array'][ $o_key ];
		FrmDb::esc_order_by( $order );

		$o_key = sanitize_title( $o_key );

		// If field is some type of post field.
		if ( ! empty( $o_field->field_options['post_field'] ) ) {
			// If field is custom field.
			if ( $o_field->field_options['post_field'] === 'post_custom' ) {
				// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
				$query['select'] .= $wpdb->prepare( ' LEFT JOIN ' . $wpdb->postmeta . ' pm' . $o_key . ' ON pm' . $o_key . '.post_id=it.post_id AND pm' . $o_key . '.meta_key = %s ', $o_field->field_options['custom_field'] );
				$query['order']  .= 'CASE when pm' . $o_key . '.meta_value IS NULL THEN 1 ELSE 0 END, pm' . $o_key . '.meta_value ';
				$query['order']  .= FrmProAppHelper::maybe_query_as_number( $o_field->type );
				$query['order']  .= $order . ', ';
			} elseif ( $o_field->field_options['post_field'] !== 'post_category' ) {
				// If field is a non-category post field.
				$query['select'] .= $first_order ? ' INNER ' : ' LEFT ';
				$query['select'] .= 'JOIN ' . sanitize_title( $wpdb->posts ) . ' p' . $o_key . ' ON p' . $o_key . '.ID=it.post_id ';

				$query['order'] .= 'CASE p' . $o_key . '.' . sanitize_title( $o_field->field_options['post_field'] ) . " WHEN '' THEN 1 ELSE 0 END, p$o_key." . sanitize_title( $o_field->field_options['post_field'] ) . ' ' . $order . ', ';
			}
		} elseif ( is_numeric( $args['order_by_array'][ $o_key ] ) ) {
			// If ordering by a normal, non-post field.
			// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
			$query['select'] .= $wpdb->prepare( ' LEFT JOIN ' . $wpdb->prefix . 'frm_item_metas em' . $o_key . ' ON em' . $o_key . '.item_id=it.id AND em' . $o_key . '.field_id=%d ', $o_field->id );
			$query['order']  .= 'CASE when em' . $o_key . '.meta_value IS NULL THEN 1 ELSE 0 END, em' . $o_key . '.meta_value ';
			$query['order']  .= FrmProAppHelper::maybe_query_as_number( $o_field->type );
			$query['order']  .= $order . ', ';

			//Meta value is only necessary for time field reordering and only if time field is first ordering field
			//Check if time field (for time field ordering)
			if ( $first_order && $o_field->type === 'time' ) {
				$args['time_field'] = $o_field;
			}
		} else {
			$query['order'] .= 'it.' . sanitize_title( $o_field ) . ' ' . $order . ', ';
		}
	}

	/**
	 * @since 3.0
	 *
	 * @param int $entry_id
	 * @return bool
	 */
	public static function is_draft( $entry_id ) {
		$entry = FrmEntry::getOne( $entry_id );
		return ( $entry && self::is_draft_status( $entry->is_draft ) );
	}

	/**
	 * Confirm if passed value is a valid entry draft status.
	 *
	 * @since 6.8
	 *
	 * @param int|string $status Entry status.
	 *
	 * @return bool
	 */
	public static function is_draft_status( $status ) {
		$draft_status = defined( 'FrmEntriesHelper::DRAFT_ENTRY_STATUS' ) ? FrmEntriesHelper::DRAFT_ENTRY_STATUS : 1;

		return $draft_status === (int) $status;
	}

	/**
	 * Get ordered and filtered entries for Views.
	 *
	 * @deprecated 6.6
	 *
	 * @param array $where
	 * @param array $args
	 * @return array
	 */
	public static function get_view_results( $where, $args ) {
		_deprecated_function( __METHOD__, '6.6', 'FrmViewsDisplay::get_view_results' );

		global $wpdb;

		$defaults = array(
			'order_by_array' => array(),
			'order_array'    => array(),
			'limit'          => '',
			'posts'          => array(),
			'display'        => false,
		);

		$args               = wp_parse_args( $args, $defaults );
		$args['time_field'] = false;

		$query = array(
			'select' => 'SELECT it.id FROM ' . $wpdb->prefix . 'frm_items it',
			'where'  => $where,
			'order'  => 'ORDER BY it.created_at ASC',
		);

		//If order is set
		if ( ! empty( $args['order_by_array'] ) ) {
			self::prepare_entries_query( $query, $args );
		}
		$query = apply_filters( 'frm_view_order', $query, $args );

		if ( ! empty( $query['where'] ) ) {
			$query['where'] = FrmDb::prepend_and_or_where( 'WHERE ', $query['where'] );
		}

		$query['order'] = rtrim( $query['order'], ', ' );

		$query = implode( ' ', $query ) . $args['limit'];
		// phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
		$entry_ids = $wpdb->get_col( $query );

		return $entry_ids;
	}
}