<?php
namespace app\common\utils\approval\service\traits;

use support\Db;
use support\Log;

trait ApprovalNotificationTrait
{
    /** 发送通知 */
    private function sendNotification(array $userIds, object $instance, string $action, bool $isCC, array $extra = []): void
    {
        $map = [
            'pending' => '待审批',
            'approve' => '已通过',
            'reject'  => '已拒绝',
            'revoked' => '已撤回',
            'voided'  => '已作废',
        ];
        $prefix = $isCC ? '【抄送】' : '【审批】';
        $text   = $map[$action] ?? $action;

        // 业务标题/内容
        $approvalType = array_flip(\app\common\service\SysDictService::pluckKeyValueByCode('approval_type'));

        $flowTxt = $approvalType[$instance->flow_type] ?? (string)$instance->flow_type;
        $title   = $prefix.'审批通知';
        $content = "{$prefix}你有一条审批 {$text}：类型 {$flowTxt}，业务标识 {$instance->biz_id}";

        switch ($instance->flow_type) {
            case 'stock_orders':
                // 备货单
                $stockOrder = \app\common\model\StockOrders::find($instance->biz_id);
                if ($stockOrder) {
                    $title   = $prefix."备货单：{$stockOrder->order_no}";
                    $flowTxt = $approvalType[$instance->flow_type] ?? $instance->flow_type;
                    $content = "{$prefix}你有一条审批 {$text}：类型 {$flowTxt}，业务单号 {$stockOrder->order_no}";
                }
                break;
            case 'stock_orders_nullify':
                // 备货单作废
                $stockOrder = \app\common\model\StockOrders::find($instance->biz_id);
                if ($stockOrder) {
                    $title   = $prefix."备货单作废：{$stockOrder->order_no}";
                    $flowTxt = $approvalType[$instance->flow_type] ?? '备货单作废';
                    $content = "{$prefix}你有一条审批 {$text}：类型 {$flowTxt}，业务单号 {$stockOrder->order_no}";
                    // 把作废原因附带展示更清晰（也可依赖 $extra['note']）
                    $fd = json_decode($instance->form_data ?? '{}', true) ?: [];
                    if (!empty($fd['_nullify_reason'])) {
                        $content .= '；原因：'.(function_exists('mb_strimwidth') ? mb_strimwidth($fd['_nullify_reason'], 0, 120, '...', 'UTF-8') : $fd['_nullify_reason']);
                    }
                }
                break;
            case 'purchase_orders':
                // 采购单
                $purchaseOrder = \app\common\model\PurchaseOrders::find($instance->biz_id);
                if ($purchaseOrder) {
                    $title   = $prefix."采购单：{$purchaseOrder->order_no}";
                    $flowTxt = $approvalType[$instance->flow_type] ?? $instance->flow_type;
                    $content = "{$prefix}你有一条审批 {$text}：类型 {$flowTxt}，业务单号 {$purchaseOrder->order_no}";
                }
                break;
            case 'purchase_order':
                // 采购单
                break;
        }

        // 附加说明（提交说明/申诉/讨论摘要）
        $append = $extra['appeal'] ?? ($extra['note'] ?? null);
        if ($append) {
            if (function_exists('mb_strimwidth')) {
                $append = mb_strimwidth($append, 0, 120, '...', 'UTF-8');
            }
            $content .= "；说明：{$append}";
        }

        noticePush([
            'title'     => $title,
            'content'   => $content,
            'recipient' => $userIds,
            'email'     => 1,
        ]);
    }

    private function notifyInitiator(object $instance, string $result): void
    {
        $this->sendNotification([(int)$instance->initiator_id], $instance, $result, false);
    }

    /** WebSocket：把一组用户的“待办数量”推送给前端（旧版） */
    private function pushTodoChanged22(array $userIds): void
    {
        $userIds = array_values(array_unique(array_map('intval', $userIds)));
        if (empty($userIds)) return;

        // 统计这些用户当前的待办数量（以 approval_records.status = 'pending' 为准）
        $rows = Db::table('approval_records')
            ->whereIn('approver_id', $userIds)
            ->where('status', 'pending')
            ->groupBy('approver_id')
            ->select('approver_id', Db::raw('COUNT(*) as cnt'))
            ->get();

        // 默认都置 0，再填充真实值
        $payload = array_fill_keys($userIds, 0);
        foreach ($rows as $r) {
            $payload[(int)$r->approver_id] = (int)$r->cnt;
        }

        try {
            foreach ($payload as $uid => $cnt) {
                $data = [
                    'event'     => 'approval.todo.counts',
                    'user_id'   => $uid,
                    'num'       => $cnt,
                ];
                \Webman\RedisQueue\Redis::send('ws-msg', $data);
            }
        } catch (\Throwable $e) {
            Log::error('ws todo push error: '.$e->getMessage());
        }
    }

    /** WebSocket：把一组用户的“待办数量”推送给前端（统一口径） */
    private function pushTodoChanged(array $userIds): void
    {
        $userIds = array_values(array_unique(array_map('intval', $userIds)));
        if (empty($userIds)) return;

        // 只统计：实例进行中 + 当前轮次 + 当前步骤 的 pending
        $rows = Db::table('approval_records as ar')
            ->join('approval_instances as ai', 'ai.id', '=', 'ar.instance_id')
            ->whereIn('ar.approver_id', $userIds)
            ->where('ar.status', 'pending')
            ->where('ai.status', 'processing')
            ->whereRaw('ar.round = ai.round')
            ->whereRaw('ar.step_index = ai.current_step')
            ->groupBy('ar.approver_id')
            ->select('ar.approver_id', Db::raw('COUNT(*) as cnt'))
            ->get();

        // 默认置 0，再填充真实值
        $payload = array_fill_keys($userIds, 0);
        foreach ($rows as $r) {
            $payload[(int)$r->approver_id] = (int)$r->cnt;
        }

        try {
            foreach ($payload as $uid => $cnt) {
                (new \app\common\utils\WsEvents())->todoCounts($uid, $cnt);
            }
        } catch (\Throwable $e) {
            Log::error('ws todo push error: '.$e->getMessage());
        }
    }
}