<?php

/**
 * 文件功能：聊天室在线用户展示数据服务
 * 负责统一拼装聊天室在线名单、Presence 频道与 Redis 在线状态使用的用户载荷。
 */

namespace App\Services;

use App\Models\Sysparam;
use App\Models\User;
use App\Support\ChatDailyStatusCatalog;

/**
 * 类功能：统一生成聊天室在线用户与身份展示相关载荷。
 */
class ChatUserPresenceService
{
    /**
     * 构建聊天室在线用户载荷。
     *
     * @return array<string, mixed>
     */
    public function build(User $user): array
    {
        $superLevel = (int) Sysparam::getValue('superlevel', '100');
        $user->loadMissing(['activePosition.position.department', 'vipLevel']);
        $position = $user->activePosition?->position;
        $payload = [
            'id' => $user->id,
            'user_id' => $user->id,
            'username' => $user->username,
            'level' => $user->user_level,
            'user_level' => $user->user_level,
            'sex' => $user->sex,
            'headface' => $user->headface,
            'headface_url' => $user->headfaceUrl,
            'headfaceUrl' => $user->headfaceUrl,
            'vip_icon' => $user->vipIcon(),
            'vip_name' => $user->vipName(),
            'vip_color' => $user->isVip() ? ($user->vipLevel?->color ?? '') : '',
            'is_admin' => $user->user_level >= $superLevel,
            'position_icon' => $position?->icon ?? '',
            'position_name' => $position?->name ?? '',
            'department_name' => $position?->department?->name ?? '',
        ];

        $activeStatus = $this->currentDailyStatus($user);
        if ($activeStatus !== null) {
            $payload['daily_status_key'] = $activeStatus['key'];
            $payload['daily_status_label'] = $activeStatus['label'];
            $payload['daily_status_icon'] = $activeStatus['icon'];
            $payload['daily_status_group'] = $activeStatus['group'];
            $payload['daily_status_expires_at'] = $activeStatus['expires_at'];
        }

        $signIdentity = $user->currentSignInIdentity();
        if ($signIdentity !== null) {
            $payload['sign_identity_key'] = $signIdentity->badge_code;
            $payload['sign_identity_label'] = $signIdentity->badge_name;
            $payload['sign_identity_icon'] = $signIdentity->badge_icon ?? '✅';
            $payload['sign_identity_color'] = $signIdentity->badge_color ?? '#0f766e';
            $payload['sign_identity_expires_at'] = $signIdentity->expires_at?->toIso8601String();
            $payload['sign_identity_streak_days'] = (int) data_get($signIdentity->metadata, 'streak_days', 0);
        }

        return $payload;
    }

    /**
     * 构建用户部门、职务与会员展示信息。
     *
     * @return array{
     *     department_name: string,
     *     position_icon: string,
     *     position_name: string,
     *     vip_icon: string,
     *     vip_name: string,
     *     vip_label: string,
     *     inline: string
     * }
     */
    public function buildIdentitySummary(User $user): array
    {
        $user->loadMissing(['activePosition.position.department', 'vipLevel']);

        $position = $user->activePosition?->position;
        $departmentName = $position?->department?->name ?? '无部门';
        $positionIcon = $position?->icon ?? '';
        $positionName = $position?->name ?? '无职务';
        $vipIcon = $user->vipIcon();
        $vipName = $user->vipName() ?: '普通会员';
        $vipLabel = trim($vipIcon.' '.$vipName);
        $positionLabel = trim($positionIcon.' '.$positionName);

        return [
            'department_name' => $departmentName,
            'position_icon' => $positionIcon,
            'position_name' => $positionName,
            'vip_icon' => $vipIcon,
            'vip_name' => $vipName,
            'vip_label' => $vipLabel,
            'inline' => "部门 {$departmentName} · 职务 {$positionLabel} · 会员 {$vipLabel}",
        ];
    }

    /**
     * 读取用户当前仍然有效的当日状态。
     *
     * @return array{key: string, label: string, icon: string, group: string, expires_at: string}|null
     */
    public function currentDailyStatus(User $user): ?array
    {
        return ChatDailyStatusCatalog::resolveActiveStatus(
            $user->daily_status_key,
            $user->daily_status_expires_at,
        );
    }
}