<?php
/**
 * Plugin settings read by more than one module.
 *
 * @package Fitzaro
 */

namespace Fitzaro;

use Fitzaro\Job\Cleanup;
use Fitzaro\Limits\Limits;
use Fitzaro\Provider\OpenAi\OpenAiKey;
use Fitzaro\Provider\OpenAi\OpenAiProvider;
use Fitzaro\Provider\Registry;

defined( 'ABSPATH' ) || exit;

/**
 * The settings screen comes with the React admin; until then the values have safe defaults.
 */
final class Settings {

	public const OPTION_PROVIDER = 'fitzaro_provider';
	public const OPTION_LIMITS   = 'fitzaro_limits';
	public const OPTION_MODEL    = 'fitzaro_openai_model';
	public const OPTION_ENABLED  = 'fitzaro_enabled';
	public const OPTION_TYPES    = 'fitzaro_types';

	/**
	 * ID of the provider new try-ons use, or null when none is configured and available.
	 * "Automatic" (the default) means OpenAI once a key is set, otherwise the mock on local and
	 * development sites.
	 */
	public static function provider_id(): ?string {
		$id = (string) get_option( self::OPTION_PROVIDER, '' );

		if ( '' === $id ) {
			if ( '' !== OpenAiKey::get() ) {
				$id = OpenAiProvider::ID;
			} elseif ( Registry::mock_allowed( wp_get_environment_type(), defined( 'FITZARO_ENABLE_MOCK' ) && (bool) constant( 'FITZARO_ENABLE_MOCK' ) ) ) {
				$id = 'mock';
			}
		}

		/**
		 * Filters the provider new try-ons are sent to.
		 *
		 * @since 1.0.0
		 *
		 * @param string $id Provider ID, empty for none.
		 */
		return self::available( apply_filters( 'fitzaro/active_provider', $id ) );
	}

	/**
	 * The ID when it names a registered provider. Checked at runtime: a filter can return anything.
	 *
	 * @param mixed $id Filter result.
	 */
	public static function available( $id ): ?string {
		return is_string( $id ) && '' !== $id && null !== Registry::get( $id ) ? $id : null;
	}

	/**
	 * Try-on limits and the monthly budget, with defaults (see Limits::DEFAULTS).
	 *
	 * @return array{per_visitor: int, per_ip: int, per_site: int, uploads_per_ip: int, monthly_budget_micros: int, estimate_micros: int}
	 */
	public static function limits(): array {
		/**
		 * Filters the try-on limits. Keys: per_visitor, per_ip, per_site, uploads_per_ip (counts per
		 * 24 hours), monthly_budget and estimate (USD). 0 means no limit.
		 *
		 * @since 1.0.0
		 *
		 * @param array<string, mixed> $limits Saved settings over the defaults.
		 */
		return Limits::normalize( apply_filters( 'fitzaro/limits', array_merge( Limits::DEFAULTS, (array) get_option( self::OPTION_LIMITS, array() ) ) ) );
	}

	/**
	 * Seconds to keep photos, results and request rows (see Cleanup::DEFAULTS).
	 *
	 * @return array{uploads: int, results: int, rows: int}
	 */
	public static function retention(): array {
		/**
		 * Filters how long data is kept, in seconds. Keys: uploads, results, rows. Values below the
		 * safe minimums are raised to them.
		 *
		 * @since 1.0.0
		 *
		 * @param array<string, int> $retention Retention in seconds.
		 */
		return Cleanup::retention( apply_filters( 'fitzaro/retention', Cleanup::DEFAULTS ) );
	}

	/**
	 * OpenAI model for new try-ons.
	 */
	public static function openai_model(): string {
		$model = get_option( self::OPTION_MODEL, OpenAiProvider::DEFAULT_MODEL );

		return is_string( $model ) && in_array( $model, OpenAiProvider::MODELS, true ) ? $model : OpenAiProvider::DEFAULT_MODEL;
	}

	/**
	 * Whether the storefront offers try-on at all (the owner's master switch).
	 */
	public static function enabled(): bool {
		return 'no' !== get_option( self::OPTION_ENABLED, 'yes' );
	}

	/**
	 * Product types the owner offers try-on for. All of them by default.
	 *
	 * @return string[]
	 */
	public static function enabled_types(): array {
		$all   = array( Prompt\ProductType::TOP, Prompt\ProductType::DRESS, Prompt\ProductType::EYEWEAR );
		$saved = get_option( self::OPTION_TYPES, $all );

		return array_values( array_intersect( $all, is_array( $saved ) ? $saved : $all ) );
	}
}