<?php

namespace Modules\Webstatement\Mail;

use Modules\Webstatement\Models\Account;
use Modules\Webstatement\Models\PrintStatementLog;
use Modules\Webstatement\Services\PHPMailerService;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\View;

/**
 * Service untuk mengirim email statement menggunakan PHPMailer
 * dengan dukungan autentikasi NTLM/GSSAPI
 */
class StatementEmail
{
    protected $statement;
    protected $filePath;
    protected $isZip;
    protected $phpMailerService;

    /**
     * Create a new message instance.
     * Membuat instance email baru untuk pengiriman statement
     *
     * @param PrintStatementLog $statement
     * @param string $filePath
     * @param bool $isZip
     */
    public function __construct(PrintStatementLog $statement, $filePath, $isZip = false)
    {
        $this->statement = $statement;
        $this->filePath = $filePath;
        $this->isZip = $isZip;
        $this->phpMailerService = new PHPMailerService();
    }

    /**
     * Kirim email statement
     *
     * @param string $emailAddress
     * @return bool
     */
    public function send(string $emailAddress): bool
    {
        try {
            // Generate subject
            $subject = $this->generateSubject();

            // Generate email body
            $body = $this->generateEmailBody();

            // Generate attachment name
            $attachmentName = $this->generateAttachmentName();

            // Determine MIME type
            $mimeType = $this->isZip ? 'application/zip' : 'application/pdf';

            // Send email using PHPMailer
            $result = $this->phpMailerService->sendEmail(
                $emailAddress,
                $subject,
                $body,
                $this->filePath,
                $attachmentName,
                $mimeType
            );

            Log::info('Statement email sent via PHPMailer', [
                'to' => $emailAddress,
                'subject' => $subject,
                'attachment' => $attachmentName,
                'account_number' => $this->statement->account_number,
                'period' => $this->statement->period_from,
                'success' => $result
            ]);

            return $result;

        } catch (\Exception $e) {
            Log::error('Failed to send statement email via PHPMailer', [
                'to' => $emailAddress,
                'account_number' => $this->statement->account_number,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return false;
        }
    }

    /**
     * Generate email subject
     *
     * @return string
     */
    protected function generateSubject(): string
    {
        $subject = 'Statement Rekening Bank Artha Graha Internasional';

        if ($this->statement->is_period_range) {
            $subject .= " - {$this->statement->period_from} to {$this->statement->period_to}";
        } else {
            $subject .= " - " . \Carbon\Carbon::createFromFormat('Ym', $this->statement->period_from)->locale('id')->isoFormat('MMMM Y');
        }

        // Add batch info for batch requests
        if ($this->statement->request_type && $this->statement->request_type !== 'single_account') {
            $subject .= " [{$this->statement->request_type}]";
        }

        if ($this->statement->batch_id) {
            $subject .= " [Batch: {$this->statement->batch_id}]";
        }

        return $subject;
    }

    /**
     * Generate email body HTML
     *
     * @return string
     */
    protected function generateEmailBody(): string
    {
        try {
            // Get account data
            $account = Account::where('account_number', $this->statement->account_number)->first();

            // Prepare data for view
            $data = [
                'statement' => $this->statement,
                'accountNumber' => $this->statement->account_number,
                'periodFrom' => $this->statement->period_from,
                'periodTo' => $this->statement->period_to,
                'isRange' => $this->statement->is_period_range,
                'requestType' => $this->statement->request_type,
                'batchId' => $this->statement->batch_id,
                'accounts' => $account
            ];

            // Render view to HTML
            return View::make('webstatement::statements.email', $data)->render();

        } catch (\Exception $e) {
            Log::error('Failed to generate email body', [
                'account_number' => $this->statement->account_number,
                'error' => $e->getMessage()
            ]);

            // Fallback to simple HTML
            return $this->generateFallbackEmailBody();
        }
    }

    /**
     * Generate fallback email body
     *
     * @return string
     */
    protected function generateFallbackEmailBody(): string
    {
        $periodText = $this->statement->is_period_range
            ? "periode {$this->statement->period_from} sampai {$this->statement->period_to}"
            : "periode " . \Carbon\Carbon::createFromFormat('Ym', $this->statement->period_from)->locale('id')->isoFormat('MMMM Y');

        return "
        <html>
        <body>
            <h2>Statement Rekening Bank Artha Graha Internasional</h2>
            <p>Yth. Nasabah,</p>
            <p>Terlampir adalah statement rekening Anda untuk {$periodText}.</p>
            <p>Nomor Rekening: {$this->statement->account_number}</p>
            <p>Terima kasih atas kepercayaan Anda.</p>
            <br>
            <p>Salam,<br>Bank Artha Graha Internasional</p>
        </body>
        </html>
        ";
    }

    /**
     * Generate attachment filename
     *
     * @return string
     */
    protected function generateAttachmentName(): string
    {
        if ($this->isZip) {
            return "{$this->statement->account_number}_{$this->statement->period_from}_to_{$this->statement->period_to}.zip";
        } else {
            return "{$this->statement->account_number}_{$this->statement->period_from}.pdf";
        }
    }
}