<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;

class NotifyUtilityFeeStatus extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'finance:notify-utility-fees';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = '檢查公共事業費狀態並寄送 Email 通知管理員';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $this->info("正在掃描公共事業費狀態...");

        // 1. 更新逾期狀態 (pending -> overdue)
        \App\Modules\Finance\Models\UtilityFee::where('payment_status', \App\Modules\Finance\Models\UtilityFee::STATUS_PENDING)
            ->whereNotNull('due_date')
            ->where('due_date', '<', now()->startOfDay())
            ->update(['payment_status' => \App\Modules\Finance\Models\UtilityFee::STATUS_OVERDUE]);

        // 2. 獲取可能需要處理的單據 (pending 或 overdue)
        $feesToCheck = \App\Modules\Finance\Models\UtilityFee::whereIn('payment_status', [
                \App\Modules\Finance\Models\UtilityFee::STATUS_PENDING,
                \App\Modules\Finance\Models\UtilityFee::STATUS_OVERDUE
            ])
            ->whereNotNull('due_date')
            ->orderBy('due_date', 'asc')
            ->get();

        if ($feesToCheck->isEmpty()) {
            $this->info("目前沒有未繳納的公共事業費。");
            return 0;
        }

        // 3. 根據業務規則過濾出今天「真正」需要發信的單據
        $today = now()->startOfDay();
        $unpaidFees = $feesToCheck->filter(function ($fee) use ($today) {
            $dueDate = \Illuminate\Support\Carbon::parse($fee->due_date)->startOfDay();
            $diffInDays = $today->diffInDays($dueDate, false);

            // 如果已經逾期 (overdue)，每天都要發信
            if ($fee->payment_status === \App\Modules\Finance\Models\UtilityFee::STATUS_OVERDUE) {
                return true;
            }

            // 如果是待繳納 (pending)，僅在特定天數發信
            // 規則：到期前 7 天、3 天、當天 (0 天)
            return in_array($diffInDays, [7, 3, 0]);
        });

        if ($unpaidFees->isEmpty()) {
            $this->info("今日無符合發信條件的公共事業費提醒。");
            return 0;
        }

        // 4. 讀取系統設定
        $senderEmail = \App\Modules\Core\Models\SystemSetting::getVal('notification.utility_fee_sender_email');
        $senderPassword = \App\Modules\Core\Models\SystemSetting::getVal('notification.utility_fee_sender_password');
        $recipientEmailsStr = \App\Modules\Core\Models\SystemSetting::getVal('notification.utility_fee_recipient_emails');

        if (empty($senderEmail) || empty($senderPassword) || empty($recipientEmailsStr)) {
            $this->warn("系統設定中缺乏完整的 Email 通知參數，跳過寄送通知。請至「系統設定」->「通知設定」完善資料。");
            return 0;
        }

        // 4. 動態覆寫應用程式名稱與 SMTP Config
        $tenantName = tenant('name') ?? config('app.name');
        config([
            'app.name' => $tenantName,
            'mail.mailers.smtp.username' => $senderEmail,
            'mail.mailers.smtp.password' => $senderPassword,
            'mail.from.address' => $senderEmail,
            'mail.from.name' => $tenantName . ' (系統通知)'
        ]);

        // 清理原先可能的 Mailer 實例，確保使用新的 Config
        \Illuminate\Support\Facades\Mail::purge();

        // 5. 解析收件者並寄送 Email
        $recipients = array_map('trim', explode(',', $recipientEmailsStr));
        $validRecipients = array_filter($recipients, fn($e) => filter_var($e, FILTER_VALIDATE_EMAIL));
        
        if (empty($validRecipients)) {
            $this->warn("無效的收件者 Email 格式，跳過寄送通知。");
            return 0;
        }

        try {
            \Illuminate\Support\Facades\Mail::to($validRecipients)->send(new \App\Mail\PaymentReminderMail($unpaidFees));
            $this->info("通知郵件已成功寄送至: " . implode(', ', $validRecipients));
        } catch (\Exception $e) {
            $this->error("Email 寄送失敗: " . $e->getMessage());
        }

        return 0;
    }
}