<?php

namespace App\Support;

/** Framework-independent rules, mirrored in melbet_sport-api. */
class ActivityEligibility
{
    public static function normalizePlatform(?string $platform): ?string
    {
        return match (strtoupper(trim($platform ?? ''))) {
            'PC' => 'PC',
            'H5', 'WECHAT', '微信' => 'H5',
            'APP', 'IOS', 'ANDROID' => 'APP',
            default => null,
        };
    }

    public static function isPublishedOn(array $activity, ?string $platform): bool
    {
        if ((int)($activity['type'] ?? 0) === 2) {
            return true;
        }
        $platforms = self::platforms($activity['publish_platforms'] ?? []);
        return !$platforms || in_array(self::normalizePlatform($platform), $platforms, true);
    }

    public static function evaluate(array $activity, ?array $member): array
    {
        if ((int)($activity['type'] ?? 0) === 2) {
            return self::result();
        }
        if (!$member) {
            return self::result('请先登录');
        }
        if (!empty($activity['register_time_limited'])) {
            $registered = strtotime($member['registered_at'] ?? '');
            $start = strtotime($activity['register_start_time'] ?? '');
            $end = strtotime($activity['register_end_time'] ?? '');
            if (!$registered || !$start || !$end || $registered < $start || $registered > $end) {
                return self::result('不符合会员注册时间条件');
            }
        }
        $platforms = self::platforms($activity['register_platforms'] ?? []);
        if ($platforms && !in_array(self::normalizePlatform($member['register_platform'] ?? null), $platforms, true)) {
            return self::result('不符合会员注册平台条件');
        }
        if (!empty($activity['deposit_limited'])) {
            $min = $activity['deposit_min'] ?? null;
            $max = $activity['deposit_max'] ?? null;
            $total = $member['deposit_total'] ?? null;
            if (!is_numeric($min) || !is_numeric($max) || !is_numeric($total)
                || bccomp((string)$total, (string)$min, 2) < 0
                || bccomp((string)$total, (string)$max, 2) > 0) {
                return self::result('不符合会员生涯存款条件');
            }
        }
        return self::result();
    }

    private static function platforms($value): array
    {
        return is_array($value) ? $value : (json_decode($value ?? '[]', true) ?: []);
    }

    private static function result(string $reason = ''): array
    {
        return ['is_eligible' => $reason === '', 'ineligible_reason' => $reason];
    }
}