<?php
/**
 * Orders and revenue by stamp. Pure arithmetic, so it runs without WordPress.
 *
 * @package AgentStamp
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class AgentStamp_Report {

	/**
	 * Days the Orders tab can show.
	 *
	 * @return int[]
	 */
	public static function periods() {
		return array( 30, 90, 365 );
	}

	/**
	 * The period a request asked for, or the first one.
	 *
	 * @param mixed $raw
	 * @return int
	 */
	public static function pick( $raw ) {
		if ( is_string( $raw ) && preg_match( '/^[0-9]{1,3}$/', $raw ) ) {
			$raw = (int) $raw;
		}
		$periods = self::periods();
		return is_int( $raw ) && in_array( $raw, $periods, true ) ? $raw : $periods[0];
	}

	/**
	 * Groups orders by the label the order list shows.
	 *
	 * @param array<int,array{verdict:string,name:string,confidence:string,total:float}> $rows
	 * @return array{orders:int,revenue:float,lines:array<int,array{label:string,verdict:string,orders:int,revenue:float,share:float}>}
	 */
	public static function summarize( array $rows ) {
		$groups  = array();
		$orders  = 0;
		$revenue = 0.0;
		foreach ( $rows as $row ) {
			$verdict = isset( $row['verdict'] ) ? (string) $row['verdict'] : '';
			if ( '' === $verdict ) {
				continue;
			}
			$result = array(
				'verdict'    => $verdict,
				'name'       => isset( $row['name'] ) ? (string) $row['name'] : '',
				'confidence' => isset( $row['confidence'] ) ? (string) $row['confidence'] : '',
				'detail'     => '',
			);
			$label = AgentStamp_Classifier::label( $result );
			$total = isset( $row['total'] ) ? (float) $row['total'] : 0.0;
			if ( ! isset( $groups[ $label ] ) ) {
				$groups[ $label ] = array(
					'label'   => $label,
					'verdict' => $verdict,
					'orders'  => 0,
					'revenue' => 0.0,
					'share'   => 0.0,
				);
			}
			$groups[ $label ]['orders']++;
			$groups[ $label ]['revenue'] += $total;
			$orders++;
			$revenue += $total;
		}

		foreach ( $groups as $label => $group ) {
			$groups[ $label ]['share'] = $orders > 0 ? $group['orders'] / $orders : 0.0;
		}

		$lines = array_values( $groups );
		usort(
			$lines,
			static function ( $a, $b ) {
				if ( $a['revenue'] === $b['revenue'] ) {
					return $b['orders'] - $a['orders'];
				}
				return $a['revenue'] < $b['revenue'] ? 1 : -1;
			}
		);

		return array(
			'orders'  => $orders,
			'revenue' => $revenue,
			'lines'   => $lines,
		);
	}

	/**
	 * Orders that were not a person.
	 *
	 * @param array{lines:array<int,array{verdict:string,orders:int,revenue:float}>} $summary
	 * @return array{orders:int,revenue:float}
	 */
	public static function not_human( array $summary ) {
		$orders  = 0;
		$revenue = 0.0;
		foreach ( $summary['lines'] as $line ) {
			if ( 'human' === $line['verdict'] ) {
				continue;
			}
			$orders  += $line['orders'];
			$revenue += $line['revenue'];
		}
		return array(
			'orders'  => $orders,
			'revenue' => $revenue,
		);
	}
}