<?php

namespace App\Http\Controllers\System;

use App\Http\Controllers\Controller;
use App\Models\Tenants\MailLog;
use App\Models\Tenants\Tenant;
use App\Models\Tenants\TenantMailConfig;
use App\Services\Mail\SmtpConnectionTester;
use App\Services\Mail\TenantMailService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\View\View;

class TenantMailConfigController extends Controller
{
    /**
     * 전체 테넌트 메일 설정 현황
     */
    public function index(Request $request): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('system.tenant-mail.index'));
        }

        $tenants = Tenant::orderBy('company_name')
            ->get()
            ->map(function ($tenant) {
                $config = TenantMailConfig::withoutGlobalScopes()
                    ->where('tenant_id', $tenant->id)
                    ->first();

                $todayCount = MailLog::withoutGlobalScopes()
                    ->where('tenant_id', $tenant->id)
                    ->whereDate('created_at', today())
                    ->whereIn('status', ['queued', 'sent'])
                    ->count();

                return (object) [
                    'tenant' => $tenant,
                    'config' => $config,
                    'today_count' => $todayCount,
                ];
            });

        return view('system.tenant-mail.index', compact('tenants'));
    }

    /**
     * 테넌트 메일 설정 편집 폼
     */
    public function edit(Request $request, int $tenantId): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('system.tenant-mail.edit', $tenantId));
        }

        $tenant = Tenant::findOrFail($tenantId);

        $config = TenantMailConfig::withoutGlobalScopes()
            ->where('tenant_id', $tenantId)
            ->first();

        $presets = config('mail-presets', []);

        $mailService = app(TenantMailService::class);
        $todayCount = $mailService->getTodayCount($tenantId);
        $monthCount = $mailService->getMonthCount($tenantId);

        return view('system.tenant-mail.edit', compact(
            'tenant',
            'config',
            'presets',
            'todayCount',
            'monthCount'
        ));
    }

    /**
     * 메일 설정 저장
     */
    public function update(Request $request, int $tenantId): JsonResponse
    {
        $tenant = Tenant::findOrFail($tenantId);

        $validated = $request->validate([
            'provider' => 'required|string|in:platform,smtp',
            'from_name' => 'required|string|max:255',
            'from_address' => 'required|email|max:255',
            'reply_to' => 'nullable|email|max:255',
            'daily_limit' => 'required|integer|min:1|max:99999',
            'is_active' => 'boolean',
            // SMTP 설정
            'preset' => 'nullable|string',
            'smtp_host' => 'required_if:provider,smtp|nullable|string|max:255',
            'smtp_port' => 'required_if:provider,smtp|nullable|integer|min:1|max:65535',
            'smtp_encryption' => 'required_if:provider,smtp|nullable|string|in:tls,ssl',
            'smtp_username' => 'required_if:provider,smtp|nullable|string|max:255',
            'smtp_password' => 'nullable|string|max:255',
            // 브랜딩
            'branding_company_name' => 'nullable|string|max:255',
            'branding_primary_color' => 'nullable|string|max:7',
            'branding_company_address' => 'nullable|string|max:500',
            'branding_company_phone' => 'nullable|string|max:50',
            'branding_footer_text' => 'nullable|string|max:500',
        ]);

        $config = TenantMailConfig::withoutGlobalScopes()
            ->where('tenant_id', $tenantId)
            ->first();

        $data = [
            'tenant_id' => $tenantId,
            'provider' => $validated['provider'],
            'from_name' => $validated['from_name'],
            'from_address' => $validated['from_address'],
            'reply_to' => $validated['reply_to'] ?? null,
            'daily_limit' => $validated['daily_limit'],
            'is_active' => $validated['is_active'] ?? true,
        ];

        // Options 구성
        $options = $config?->options ?? [];

        // SMTP 설정
        if ($validated['provider'] === 'smtp') {
            $options['preset'] = $validated['preset'] ?? 'custom';
            $options['smtp'] = [
                'host' => $validated['smtp_host'],
                'port' => $validated['smtp_port'],
                'encryption' => $validated['smtp_encryption'],
                'username' => $validated['smtp_username'],
            ];

            // 비밀번호: 새로 입력된 경우에만 업데이트
            if (! empty($validated['smtp_password'])) {
                $options['smtp']['password'] = encrypt($validated['smtp_password']);
            } elseif (isset($config?->options['smtp']['password'])) {
                $options['smtp']['password'] = $config->options['smtp']['password'];
            }
        } else {
            // platform 모드에서는 SMTP 설정 제거
            unset($options['smtp'], $options['preset']);
        }

        // 브랜딩
        $options['branding'] = array_filter([
            'company_name' => $validated['branding_company_name'] ?? null,
            'primary_color' => $validated['branding_primary_color'] ?? '#1a56db',
            'company_address' => $validated['branding_company_address'] ?? null,
            'company_phone' => $validated['branding_company_phone'] ?? null,
            'footer_text' => $validated['branding_footer_text'] ?? 'SAM 시스템에서 발송된 메일입니다.',
        ]);

        $data['options'] = $options;
        $data['updated_by'] = auth()->id();

        if ($config) {
            $config->update($data);
        } else {
            $data['created_by'] = auth()->id();
            $config = TenantMailConfig::create($data);
        }

        return response()->json([
            'ok' => true,
            'message' => '메일 설정이 저장되었습니다.',
            'data' => $config->fresh(),
        ]);
    }

    /**
     * SMTP 연결 테스트
     */
    public function test(Request $request, int $tenantId): JsonResponse
    {
        $validated = $request->validate([
            'host' => 'required|string',
            'port' => 'required|integer',
            'encryption' => 'required|string|in:tls,ssl',
            'username' => 'required|string',
            'password' => 'required|string',
            'preset' => 'nullable|string',
            'send_test_mail' => 'boolean',
        ]);

        $tester = new SmtpConnectionTester;
        $result = $tester->testViaLaravel(
            host: $validated['host'],
            port: $validated['port'],
            encryption: $validated['encryption'],
            username: $validated['username'],
            password: $validated['password'],
            testRecipient: ($validated['send_test_mail'] ?? false) ? $validated['username'] : null
        );

        // 테스트 결과를 config에 기록
        $config = TenantMailConfig::withoutGlobalScopes()
            ->where('tenant_id', $tenantId)
            ->first();

        if ($config) {
            $config->setOption('connection_test', [
                'last_tested_at' => now()->toIso8601String(),
                'last_result' => $result['success'] ? 'success' : 'failed',
                'response_time_ms' => $result['response_time_ms'],
                'server_banner' => $result['server_banner'] ?? null,
                'tested_by' => auth()->user()?->email,
            ]);
            $config->save();
        }

        if ($result['success']) {
            return response()->json([
                'ok' => true,
                'message' => $result['message'],
                'data' => [
                    'response_time_ms' => $result['response_time_ms'],
                    'server_banner' => $result['server_banner'],
                    'test_mail_sent' => $result['test_mail_sent'] ?? false,
                ],
            ]);
        }

        return response()->json([
            'ok' => false,
            'message' => $result['message'],
            'data' => [
                'error_code' => $result['error_code'],
                'troubleshoot' => SmtpConnectionTester::getTroubleshoot(
                    $result['error_code'] ?? 'UNKNOWN',
                    $validated['preset'] ?? null
                ),
                'response_time_ms' => $result['response_time_ms'],
            ],
        ]);
    }

    /**
     * SMTP 프리셋 목록
     */
    public function presets(): JsonResponse
    {
        return response()->json([
            'ok' => true,
            'data' => config('mail-presets', []),
        ]);
    }
}