<?php

namespace App\Http\Controllers\ESign;

use App\Http\Controllers\Controller;
use App\Models\ESign\EsignHandwritingVerification;
use App\Models\ESign\EsignVerificationTemplate;
use App\Services\ESign\HandwritingVerificationService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\View\View;
use Symfony\Component\HttpFoundation\Response;

class EsignVerificationController extends Controller
{
    private HandwritingVerificationService $service;

    public function __construct(HandwritingVerificationService $service)
    {
        $this->service = $service;
    }

    // ─── 화면 라우트 ───

    public function dashboard(Request $request): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('esign-verification.dashboard'));
        }

        return view('esign.verification.dashboard');
    }

    public function templates(Request $request): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('esign-verification.templates'));
        }

        return view('esign.verification.templates');
    }

    public function demo(Request $request): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('esign-verification.demo'));
        }

        return view('esign.verification.demo');
    }

    // ─── API: 확인 템플릿 CRUD ───

    public function indexTemplates(Request $request): JsonResponse
    {
        $tenantId = Auth::user()->tenant_id;

        $templates = EsignVerificationTemplate::where('tenant_id', $tenantId)
            ->where('is_active', true)
            ->orderBy('created_at', 'desc')
            ->get();

        return response()->json(['success' => true, 'data' => $templates]);
    }

    public function storeTemplate(Request $request): JsonResponse
    {
        $request->validate([
            'name' => 'required|string|max:100',
            'category' => 'nullable|string|max:50',
            'steps' => 'required|array|min:1',
            'steps.*.order' => 'required|integer|min:1',
            'steps.*.text' => 'required|string|max:200',
            'steps.*.threshold' => 'required|numeric|min:50|max:100',
            'pass_threshold' => 'nullable|numeric|min:50|max:100',
            'max_attempts' => 'nullable|integer|min:1|max:20',
        ]);

        $tenantId = Auth::user()->tenant_id;

        $template = EsignVerificationTemplate::create([
            'tenant_id' => $tenantId,
            'name' => $request->input('name'),
            'category' => $request->input('category'),
            'steps' => $request->input('steps'),
            'pass_threshold' => $request->input('pass_threshold', 80.00),
            'max_attempts' => $request->input('max_attempts', 5),
            'is_active' => true,
            'created_by' => Auth::id(),
        ]);

        return response()->json(['success' => true, 'data' => $template], 201);
    }

    public function showTemplate(int $id): JsonResponse
    {
        $tenantId = Auth::user()->tenant_id;

        $template = EsignVerificationTemplate::where('tenant_id', $tenantId)
            ->findOrFail($id);

        return response()->json(['success' => true, 'data' => $template]);
    }

    public function updateTemplate(Request $request, int $id): JsonResponse
    {
        $request->validate([
            'name' => 'required|string|max:100',
            'category' => 'nullable|string|max:50',
            'steps' => 'required|array|min:1',
            'steps.*.order' => 'required|integer|min:1',
            'steps.*.text' => 'required|string|max:200',
            'steps.*.threshold' => 'required|numeric|min:50|max:100',
            'pass_threshold' => 'nullable|numeric|min:50|max:100',
            'max_attempts' => 'nullable|integer|min:1|max:20',
        ]);

        $tenantId = Auth::user()->tenant_id;

        $template = EsignVerificationTemplate::where('tenant_id', $tenantId)
            ->findOrFail($id);

        $template->update([
            'name' => $request->input('name'),
            'category' => $request->input('category'),
            'steps' => $request->input('steps'),
            'pass_threshold' => $request->input('pass_threshold', 80.00),
            'max_attempts' => $request->input('max_attempts', 5),
        ]);

        return response()->json(['success' => true, 'data' => $template]);
    }

    public function destroyTemplate(int $id): JsonResponse
    {
        $tenantId = Auth::user()->tenant_id;

        $template = EsignVerificationTemplate::where('tenant_id', $tenantId)
            ->findOrFail($id);

        $template->update(['is_active' => false]);

        return response()->json(['success' => true, 'message' => '템플릿이 비활성화되었습니다.']);
    }

    // ─── API: 데모 (인식 테스트) ───

    public function demoRecognize(Request $request): JsonResponse
    {
        $request->validate([
            'image' => 'required|string',
            'expected_text' => 'required|string|max:200',
        ]);

        $result = $this->service->demo(
            $request->input('image'),
            $request->input('expected_text'),
        );

        return response()->json(['success' => true, 'data' => $result]);
    }

    // ─── API: 검증 이력 ───

    public function verificationHistory(Request $request): JsonResponse
    {
        $tenantId = Auth::user()->tenant_id;

        $query = EsignHandwritingVerification::where('tenant_id', $tenantId)
            ->orderBy('created_at', 'desc');

        if ($request->filled('contract_id')) {
            $query->where('contract_id', $request->input('contract_id'));
        }

        $data = $query->limit(100)->get();

        return response()->json(['success' => true, 'data' => $data]);
    }

    // ─── API: 통계 ───

    public function stats(): JsonResponse
    {
        $tenantId = Auth::user()->tenant_id;

        $total = EsignHandwritingVerification::where('tenant_id', $tenantId)->count();
        $passed = EsignHandwritingVerification::where('tenant_id', $tenantId)->where('is_passed', true)->count();
        $failed = $total - $passed;
        $avgScore = EsignHandwritingVerification::where('tenant_id', $tenantId)
            ->whereNotNull('similarity_score')
            ->avg('similarity_score') ?? 0;
        $avgAttempts = EsignHandwritingVerification::where('tenant_id', $tenantId)
            ->where('is_passed', true)
            ->avg('attempt_number') ?? 0;

        $templateCount = EsignVerificationTemplate::where('tenant_id', $tenantId)
            ->where('is_active', true)
            ->count();

        return response()->json([
            'success' => true,
            'data' => [
                'total_verifications' => $total,
                'passed' => $passed,
                'failed' => $failed,
                'pass_rate' => $total > 0 ? round(($passed / $total) * 100, 1) : 0,
                'avg_score' => round($avgScore, 1),
                'avg_attempts' => round($avgAttempts, 1),
                'template_count' => $templateCount,
            ],
        ]);
    }
}