<?php

namespace App\Http\Controllers\Sales;

use App\Http\Controllers\Controller;
use App\Models\Sales\SalesManager;
use App\Models\Sales\SalesProspect;
use App\Models\Sales\SalesProspectProduct;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Storage;
use Illuminate\View\View;

/**
 * 가망고객 관리 컨트롤러
 */
class SalesProspectController extends Controller
{
    /**
     * 목록 페이지
     */
    public function index(Request $request): View|Response
    {
        if ($request->header('HX-Request')) {
            return response('', 200)->header('HX-Redirect', route('sales.prospects.index'));
        }

        $query = SalesProspect::with(['manager', 'salesManager', 'products']);

        // 검색
        if ($search = $request->get('search')) {
            $query->where(function ($q) use ($search) {
                $q->where('company_name', 'like', "%{$search}%")
                    ->orWhere('business_no', 'like', "%{$search}%")
                    ->orWhere('representative', 'like', "%{$search}%")
                    ->orWhere('contact_phone', 'like', "%{$search}%");
            });
        }

        // 상태 필터
        if ($status = $request->get('status')) {
            $query->where('status', $status);
        }

        // 담당자 필터
        if ($managerId = $request->get('manager_id')) {
            $query->where(function ($q) use ($managerId) {
                $q->where('manager_id', $managerId)
                    ->orWhere('sales_manager_id', $managerId);
            });
        }

        $prospects = $query->orderByDesc('created_at')->paginate(20);

        // 통계
        $stats = [
            'total' => SalesProspect::count(),
            'lead' => SalesProspect::where('status', 'lead')->count(),
            'prospect' => SalesProspect::where('status', 'prospect')->count(),
            'negotiation' => SalesProspect::where('status', 'negotiation')->count(),
            'contracted' => SalesProspect::where('status', 'contracted')->count(),
            'total_contract' => SalesProspectProduct::sum('contract_amount'),
            'total_commission' => SalesProspectProduct::sum('commission_amount'),
        ];

        $managers = SalesManager::active()->orderBy('name')->get();

        return view('sales.prospects.index', compact('prospects', 'stats', 'managers'));
    }

    /**
     * 등록 폼
     */
    public function create(): View
    {
        $managers = SalesManager::active()->orderBy('name')->get();

        return view('sales.prospects.create', compact('managers'));
    }

    /**
     * 등록 처리
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            'manager_id' => 'required|exists:sales_managers,id',
            'sales_manager_id' => 'nullable|exists:sales_managers,id',
            'company_name' => 'required|string|max:200',
            'representative' => 'nullable|string|max:100',
            'business_no' => 'nullable|string|max:20',
            'contact_phone' => 'nullable|string|max:20',
            'email' => 'nullable|email|max:100',
            'address' => 'nullable|string|max:500',
            'status' => 'required|in:lead,prospect,negotiation,contracted,lost',
            'business_card_image_data' => 'nullable|string',
            'id_card_image_data' => 'nullable|string',
            'bankbook_image_data' => 'nullable|string',
        ]);

        // 명함 이미지 저장 (Base64)
        if (!empty($validated['business_card_image_data'])) {
            $validated['business_card_image'] = $this->saveBase64Image($validated['business_card_image_data'], 'business-cards');
        }
        unset($validated['business_card_image_data']);

        // 신분증 이미지 저장 (Base64)
        if (!empty($validated['id_card_image_data'])) {
            $validated['id_card_image'] = $this->saveBase64Image($validated['id_card_image_data'], 'id-cards');
        }
        unset($validated['id_card_image_data']);

        // 통장사본 이미지 저장 (Base64)
        if (!empty($validated['bankbook_image_data'])) {
            $validated['bankbook_image'] = $this->saveBase64Image($validated['bankbook_image_data'], 'bankbooks');
        }
        unset($validated['bankbook_image_data']);

        $prospect = SalesProspect::create($validated);

        return redirect()->route('sales.prospects.show', $prospect->id)
            ->with('success', '가망고객이 등록되었습니다.');
    }

    /**
     * 상세 페이지
     */
    public function show(int $id): View
    {
        $prospect = SalesProspect::with([
            'manager',
            'salesManager',
            'products',
            'scenarios',
            'consultations.manager'
        ])->findOrFail($id);

        $managers = SalesManager::active()
            ->whereIn('role', ['sales_admin', 'manager'])
            ->orderBy('name')
            ->get();

        return view('sales.prospects.show', compact('prospect', 'managers'));
    }

    /**
     * 수정 폼
     */
    public function edit(int $id): View
    {
        $prospect = SalesProspect::findOrFail($id);
        $managers = SalesManager::active()->orderBy('name')->get();

        return view('sales.prospects.edit', compact('prospect', 'managers'));
    }

    /**
     * 수정 처리
     */
    public function update(Request $request, int $id)
    {
        $prospect = SalesProspect::findOrFail($id);

        $validated = $request->validate([
            'sales_manager_id' => 'nullable|exists:sales_managers,id',
            'company_name' => 'required|string|max:200',
            'representative' => 'nullable|string|max:100',
            'business_no' => 'nullable|string|max:20',
            'contact_phone' => 'nullable|string|max:20',
            'email' => 'nullable|email|max:100',
            'address' => 'nullable|string|max:500',
            'status' => 'required|in:lead,prospect,negotiation,contracted,lost',
            'business_card' => 'nullable|image|max:5120',
            'id_card' => 'nullable|image|max:5120',
            'bankbook' => 'nullable|image|max:5120',
        ]);

        // 명함 이미지 업로드 처리
        if ($request->hasFile('business_card')) {
            if ($prospect->business_card_image) {
                Storage::disk('public')->delete($prospect->business_card_image);
            }
            $validated['business_card_image'] = $request->file('business_card')
                ->store('business-cards', 'public');
        }
        unset($validated['business_card']);

        // 신분증 이미지 업로드 처리
        if ($request->hasFile('id_card')) {
            if ($prospect->id_card_image) {
                Storage::disk('public')->delete($prospect->id_card_image);
            }
            $validated['id_card_image'] = $request->file('id_card')
                ->store('id-cards', 'public');
        }
        unset($validated['id_card']);

        // 통장사본 이미지 업로드 처리
        if ($request->hasFile('bankbook')) {
            if ($prospect->bankbook_image) {
                Storage::disk('public')->delete($prospect->bankbook_image);
            }
            $validated['bankbook_image'] = $request->file('bankbook')
                ->store('bankbooks', 'public');
        }
        unset($validated['bankbook']);

        $prospect->update($validated);

        return redirect()->route('sales.prospects.show', $prospect->id)
            ->with('success', '가망고객 정보가 수정되었습니다.');
    }

    /**
     * 삭제 처리
     */
    public function destroy(int $id)
    {
        $prospect = SalesProspect::findOrFail($id);

        // 첨부 이미지 삭제
        $imageFields = ['business_card_image', 'id_card_image', 'bankbook_image'];
        foreach ($imageFields as $field) {
            if ($prospect->$field) {
                Storage::disk('public')->delete($prospect->$field);
            }
        }

        $prospect->delete();

        return redirect()->route('sales.prospects.index')
            ->with('success', '가망고객이 삭제되었습니다.');
    }

    /**
     * Base64 이미지 저장
     */
    private function saveBase64Image(string $base64Data, string $folder): ?string
    {
        // data:image/jpeg;base64,... 형식에서 데이터 추출
        if (preg_match('/^data:image\/(\w+);base64,/', $base64Data, $matches)) {
            $extension = $matches[1];
            $base64Data = preg_replace('/^data:image\/\w+;base64,/', '', $base64Data);
        } else {
            $extension = 'jpg';
        }

        $imageData = base64_decode($base64Data);
        if ($imageData === false) {
            return null;
        }

        $filename = $folder . '/' . date('Ymd') . '_' . uniqid() . '.' . $extension;
        Storage::disk('public')->put($filename, $imageData);

        return $filename;
    }
}