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class OsWhatsappHelper {

	static array $templates;

	public static function get_buttons_component_possible_variable_holders( array $template ): array {
		$holders = [];
		foreach ( $template[&#039;components&#039;] as $component ) {
			if ( $component[&#039;type&#039;] == &#039;BUTTONS&#039; ) {
				$buttons = $component[&#039;buttons&#039;];
				foreach ( $buttons as $button ) {
					switch ( $button[&#039;type&#039;] ) {
						case &#039;URL&#039;:
							$holders[] = $button[&#039;text&#039;];
							$holders[] = $button[&#039;url&#039;];
							break;

						case &#039;PHONE_NUMBER&#039;:
							$holders[] = $button[&#039;text&#039;];
							$holders[] = $button[&#039;phone_number&#039;];
							break;
					}
				}
			}
		}

		return $holders;

	}

	public static function get_template_component_value_by_key( array $template, string $component_type, string $component_key ) {
		foreach ( $template[&#039;components&#039;] as $component ) {
			if ( $component[&#039;type&#039;] == $component_type ) {
				return $component[ $component_key ];
			}
		}

		return null;
	}

	/**
	 * @return array
	 */
	public static function get_template( string $template_id ): array {
		try {
			$templates = self::get_templates();
			foreach ( $templates as $template ) {
				if ( $template[&#039;id&#039;] == $template_id ) {
					return $template;
				}
			}
		} catch ( Exception $e ) {
			return [];
		}

		return [];
	}

	public static function get_template_preview( string $template_id, \LatePoint\Misc\ProcessAction $action ): string {
		$html              = &#039;&#039;;
		$selected_template = \OsWhatsappHelper::get_template( $template_id );
		$html              .= \OsFormHelper::hidden_field( &#039;process[actions][&#039; . $action-&gt;id . &#039;][settings][template_language]&#039;, $selected_template[&#039;language&#039;] );
		$html              .= \OsFormHelper::hidden_field( &#039;process[actions][&#039; . $action-&gt;id . &#039;][settings][template_parameter_format]&#039;, $selected_template[&#039;parameter_format&#039;] );
		$html              .= \OsFormHelper::hidden_field( &#039;process[actions][&#039; . $action-&gt;id . &#039;][settings][template_category]&#039;, $selected_template[&#039;category&#039;] );
		$html              .= \OsFormHelper::hidden_field( &#039;process[actions][&#039; . $action-&gt;id . &#039;][settings][template_name]&#039;, $selected_template[&#039;name&#039;] );

		$variables_by_type[&#039;header&#039;]  = \OsWhatsappHelper::extract_variables_from_template( \OsWhatsappHelper::get_template_component_value_by_key( $selected_template, &#039;HEADER&#039;, &#039;text&#039; ) );
		$variables_by_type[&#039;body&#039;]    = \OsWhatsappHelper::extract_variables_from_template( \OsWhatsappHelper::get_template_component_value_by_key( $selected_template, &#039;BODY&#039;, &#039;text&#039; ) );
		$variables_by_type[&#039;buttons&#039;] = \OsWhatsappHelper::extract_variables_from_button_holders( \OsWhatsappHelper::get_buttons_component_possible_variable_holders( $selected_template ) );

		$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-wrapper&quot;&gt;&#039;;
		$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-content-wrapper&quot;&gt;&#039;;
		$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-heading&quot;&gt;&#039; . __( &#039;Message Preview&#039;, &#039;latepoint&#039; ) . &#039;&lt;/div&gt;&#039;;;
		$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-messages&quot;&gt;&#039;;
		if ( $selected_template ) {
			$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-message&quot;&gt;&#039;;
			switch ( esc_html( \OsWhatsappHelper::get_template_component_value_by_key( $selected_template, &#039;HEADER&#039;, &#039;format&#039; ) ) ) {
				case &#039;TEXT&#039;:
					$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-message-header&quot;&gt;&#039; . \OsWhatsappHelper::colorize_variables( esc_html( \OsWhatsappHelper::get_template_component_value_by_key( $selected_template, &#039;HEADER&#039;, &#039;text&#039; ) ) ) . &#039;&lt;/div&gt;&#039;;
					break;
				case &#039;IMAGE&#039;:
					break;
				case &#039;VIDEO&#039;:
					break;
				case &#039;DOCUMENT&#039;:
					break;
				case &#039;LOCATION&#039;:
					break;
			}
			$html    .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-message-body&quot;&gt;&#039; . \OsWhatsappHelper::colorize_variables( esc_html( \OsWhatsappHelper::get_template_component_value_by_key( $selected_template, &#039;BODY&#039;, &#039;text&#039; ) ), count( $variables_by_type[&#039;header&#039;] ) ) . &#039;&lt;/div&gt;&#039;;
			$buttons = \OsWhatsappHelper::get_template_component_value_by_key( $selected_template, &#039;BUTTONS&#039;, &#039;buttons&#039; );
			if ( $buttons ) {
				$html        .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-message-buttons&quot;&gt;&#039;;
				$start_index = count( $variables_by_type[&#039;header&#039;] ) + count( $variables_by_type[&#039;body&#039;] );
				foreach ( $buttons as $button ) {
					$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-message-button latepoint-whatsapp-button-type-&#039; . esc_attr( $button[&#039;type&#039;] ) . &#039;&quot;&gt;&#039;;
					switch ( $button[&#039;type&#039;] ) {
						case &#039;PHONE_NUMBER&#039;:
							$html .= &#039;&lt;i class=&quot;latepoint-icon latepoint-icon-phone&quot;&gt;&lt;/i&gt;&#039; . esc_html( $button[&#039;text&#039;] ) . &#039;&lt;div class=&quot;latepoint-whatsapp-button-action-value&quot;&gt;&#039; . \OsWhatsappHelper::colorize_variables( $button[&#039;phone_number&#039;], $start_index ) . &#039;&lt;/div&gt;&#039;;
							break;
						case &#039;URL&#039;:
							$html .= &#039;&lt;i class=&quot;latepoint-icon latepoint-icon-external-link&quot;&gt;&lt;/i&gt;&#039; . esc_html( $button[&#039;text&#039;] ) . &#039;&lt;div class=&quot;latepoint-whatsapp-button-action-value&quot;&gt;&#039; . \OsWhatsappHelper::colorize_variables( $button[&#039;url&#039;], $start_index ) . &#039;&lt;/div&gt;&#039;;
							break;
					}
					$html .= &#039;&lt;/div&gt;&#039;;
				}
				$html .= &#039;&lt;/div&gt;&#039;;
			}
			$html .= &#039;&lt;/div&gt;&#039;;
		}
		$html .= &#039;&lt;/div&gt;&#039;;
		$html .= &#039;&lt;/div&gt;&#039;;
		if ( ! empty( $variables_by_type[&#039;header&#039;] ) || ! empty( $variables_by_type[&#039;body&#039;] ) || ! empty( $variables_by_type[&#039;buttons&#039;] ) ) {

			$html                 .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-variables-wrapper parameter-format-&#039;.esc_attr(strtolower($selected_template[&#039;parameter_format&#039;])).&#039;&quot;&gt;&#039;;
			$html                 .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-heading&quot;&gt;&#039;;
			$html                 .= &#039;&lt;div&gt;&#039; . __( &#039;Assign Variables&#039;, &#039;latepoint&#039; ) . &#039;&lt;/div&gt;&#039;;
			$html                 .= &#039;&lt;/div&gt;&#039;;
			$html                 .= &#039;&lt;div class=&quot;latepoint-whatsapp-template-preview-variables-inner&quot;&gt;&#039;;
			$smart_variables_link = &#039;&lt;a href=&quot;#&quot; class=&quot;open-template-variables-panel&quot;&gt;&#039; . esc_html__( &#039;Click here&#039;, &#039;latepoint&#039; ) . &#039;&lt;/a&gt;&#039;;
			$html                 .= &#039;&lt;div class=&quot;latepoint-whatsapp-note&quot;&gt;&#039; . sprintf( __( &#039;You have to assign values for each variable that is used in this template. %s to show smart variables that you can use.&#039; ), $smart_variables_link ) . &#039;&lt;/div&gt;&#039;;
			$color_index          = 0;
			foreach ( $variables_by_type as $variable_type =&gt; $variables ) {
				if ( ! empty( $variables ) ) {
					$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-variables-header&quot;&gt;&lt;div&gt;&#039; . $variable_type . &#039;&lt;/div&gt;&lt;div class=&quot;latepoint-whatsapp-header-line&quot;&gt;&lt;/div&gt;&lt;/div&gt;&#039;;
					foreach ( $variables as $variable ) {
						$html .= &#039;&lt;div class=&quot;latepoint-whatsapp-variable-value&quot;&gt;&lt;div style=&quot;background-color: &#039; . \OsUtilHelper::get_color_for_variable_by_index( $color_index ) . &#039;&quot;&gt;&#039; . $variable . &#039;&lt;/div&gt;&lt;div&gt;&#039; . \OsFormHelper::text_field( &#039;process[actions][&#039; . $action-&gt;id . &#039;][settings][variables][&#039; . $variable_type . &#039;][&#039; . $variable . &#039;]&#039;, false, $action-&gt;settings[&#039;variables&#039;][ $variable_type ][ $variable ] ?? &#039;&#039;, [
								&#039;theme&#039;       =&gt; &#039;simple&#039;,
								&#039;class&#039;       =&gt; &#039;size-small&#039;,
								&#039;placeholder&#039; =&gt; sprintf( __( &#039;Enter value for %s&#039;, &#039;latepoint&#039; ), $variable )
							] ) . &#039;&lt;/div&gt;&lt;/div&gt;&#039;;
						$color_index ++;
					}
				}
			}
			$html .= &#039;&lt;/div&gt;&#039;;
			$html .= &#039;&lt;/div&gt;&#039;;
		}
		$html .= &#039;&lt;/div&gt;&#039;;

		return $html;
	}

	public static function get_templates_list( bool $force_reload = false ): array {
		try {
			$templates      = self::get_templates( $force_reload );
			$templates_list = [];
			foreach ( $templates as $template ) {
				$name             = $template[&#039;name&#039;] . &#039;-&#039; . $template[&#039;language&#039;] . &#039; [&#039; . $template[&#039;status&#039;] . &#039;]&#039;;
				$templates_list[] = [ &#039;value&#039; =&gt; $template[&#039;id&#039;], &#039;label&#039; =&gt; $name ];
			}

			return $templates_list;
		} catch ( Exception $e ) {
			return [ &#039;error&#039; =&gt; $e-&gt;getMessage() ];
		}
	}

	/**
	 * @return array
	 * @throws Exception
	 */
	public static function get_templates( bool $force_reload = false ): array {
		if ( isset( self::$templates ) &amp;&amp; ! $force_reload ) {
			return self::$templates;
		}
		try {
			return apply_filters( &#039;latepoint_get_whatsapp_templates&#039;, [] );
		} catch ( Exception $e ) {
			return [];
		}
	}


	/**
	 * @param $to
	 * @param $content
	 *
	 * @return array [
	 * &#039;status&#039; =&gt; string,
	 * &#039;message&#039; =&gt; string,
	 * &#039;to&#039; =&gt; string,
	 * &#039;content&#039; =&gt; string,
	 * &#039;processor_code&#039; =&gt; string,
	 * &#039;processor_name&#039; =&gt; string,
	 * &#039;processed_datetime&#039; =&gt; string,
	 * &#039;extra_data&#039; =&gt; array
	 * ]
	 */
	public static function send_whatsapp( string $to, array $data, array $activity_data = [] ): array {
		$result = [
			&#039;status&#039;             =&gt; LATEPOINT_STATUS_ERROR,
			&#039;message&#039;            =&gt; __( &#039;No WhatsApp processor is selected.&#039;, &#039;latepoint&#039; ),
			&#039;to&#039;                 =&gt; $to,
			&#039;data&#039;               =&gt; $data,
			&#039;processor_code&#039;     =&gt; &#039;&#039;,
			&#039;processor_name&#039;     =&gt; &#039;&#039;,
			&#039;processed_datetime&#039; =&gt; &#039;&#039;,
			&#039;extra_data&#039;         =&gt; [
				&#039;activity_data&#039; =&gt; $activity_data
			],
			&#039;errors&#039;             =&gt; []
		];

		if ( OsSettingsHelper::is_whatsapp_allowed() &amp;&amp; OsNotificationsHelper::is_notification_type_enabled( &#039;whatsapp&#039; ) ) {
			/**
			 * Result of sending an WhatsApp message to a recipient&#039;s phone number
			 *
			 * @param {array} $result The array of data describing the send operation
			 * @param {string} $to The recipient&#039;s phone number
			 * @param {array} $data The data array holding template message information and variables
			 * @param {array} $activity_data The data array with information about process activity
			 *
			 * @since 5.1.3
			 * @hook latepoint_notifications_send_whatsapp
			 * @returns {array} The array of descriptive data, possibly transformed by hooked WhatsApp processor(s)
			 */
			$result = apply_filters( &#039;latepoint_notifications_send_whatsapp&#039;, $result, $to, $data, $activity_data );
		} else {
			$result[&#039;message&#039;]  = __( &#039;WhatsApp notifications are disabled&#039;, &#039;latepoint&#039; );
			$result[&#039;errors&#039;][] = __( &#039;WhatsApp notifications are disabled&#039;, &#039;latepoint&#039; );
		}

		self::log_whatsapp( $result );

		return $result;
	}

	/**
	 * @param $enabled_only
	 *
	 * @return array [
	 *   &#039;code&#039; =&gt; [
	 *      &#039;code&#039; =&gt; string,
	 *      &#039;label&#039; =&gt; string,
	 *      &#039;image_url&#039; =&gt; string
	 *   ]
	 * ]
	 */
	public static function get_whatsapp_processors( $enabled_only = false ) {
		$whatsapp_processors = [];

		/**
		 * Get the list of WhatsApp processors registered in the LatePoint ecosystem
		 *
		 * @param {array} $whatsapp_processors The list of WhatsApp processors being filtered
		 * @param {bool} $enabled_only True when filtering only enabled WhatsApp processors, false otherwise
		 * @returns {array} The filtered list of WhatsApp processors
		 *
		 * @since 5.1.3
		 * @hook latepoint_whatsapp_processors
		 *
		 */
		return apply_filters( &#039;latepoint_whatsapp_processors&#039;, $whatsapp_processors, $enabled_only );
	}

	public static function is_whatsapp_processor_enabled( string $whatsapp_processor_code ): bool {
		return ( OsNotificationsHelper::get_selected_processor_code_by_type( &#039;whatsapp&#039; ) == $whatsapp_processor_code );
	}

	/**
	 * @param array $result
	 *
	 * @return OsActivityModel
	 */
	public static function log_whatsapp( array $result ) {
		if ( empty( $result[&#039;processed_datetime&#039;] ) ) {
			$result[&#039;processed_datetime&#039;] = OsTimeHelper::now_datetime_in_db_format();
		}
		$data = [
			&#039;code&#039;        =&gt; &#039;whatsapp_sent&#039;,
			&#039;description&#039; =&gt; wp_json_encode( $result )
		];
		if ( ! empty( $result[&#039;extra_data&#039;][&#039;activity_data&#039;] ) ) {
			$data = array_merge( $data, $result[&#039;extra_data&#039;][&#039;activity_data&#039;] );
		}
		$activity = OsActivitiesHelper::create_activity( $data );

		return $activity;
	}

	public static function colorize_variables( string $text, int $starting_index = 0 ): string {
		$colors = OsUtilHelper::get_colors_for_variables();

		// Create a map to store color assignments for each variable number
		$variableColors = [];

		return preg_replace_callback( &#039;/\{\{([a-zA-Z0-9_]+)\}\}/&#039;, function ( $match ) use ( $colors, &amp;$variableColors, $starting_index ) {
			$varNumber = $match[1];

			// If this variable hasn&#039;t been assigned a color yet, assign the next color
			if ( ! isset( $variableColors[ $varNumber ] ) ) {
				$variableColors[ $varNumber ] = $colors[ ( count( $variableColors ) % count( $colors ) ) + $starting_index ];
			}

			return sprintf( &#039;&lt;span class=&quot;latepoint-whatsapp-template-variable&quot; style=&quot;background-color: %s&quot; data-variable=&quot;{{%s}}&quot;&gt;{{%s}}&lt;/span&gt;&#039;,
				$variableColors[ $varNumber ],
				$varNumber,
				$varNumber
			);
		}, $text );
	}

	public static function extract_variables_from_template( ?string $text ): array {
		$variables = [];
		if ( empty( $text ) ) {
			return $variables;
		}

		// Match anything between {{ and }}
		preg_match_all( &#039;/\{\{([^}]+)\}\}/&#039;, $text, $matches );

		if ( ! empty( $matches[0] ) ) {
			// Convert to and from array to get unique values while preserving original order
			$variables = array_values( array_unique( $matches[0] ) );
		}

		return $variables;
	}

	public static function extract_variables_from_button_holders( array $holders ): array {
		$joined_holders = implode( &#039;, &#039;, $holders );

		return self::extract_variables_from_template( $joined_holders );
	}

	public static function get_business_id() {
		/**
		 * Get business ID of a whatsapp account
		 *
		 * @param {string} $business_id WhatsApp Business ID
		 * @returns {string} The filtered business ID
		 *
		 * @since 5.1.3
		 * @hook latepoint_whatsapp_business_id
		 *
		 */
		return apply_filters( &#039;latepoint_whatsapp_business_id&#039;, &#039;&#039; );
	}
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