<?php

namespace App\Http\Controllers\Api\Admin\HR;

use App\Http\Controllers\Controller;
use App\Models\Boards\File;
use App\Services\HR\EmployeeService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Str;

class EmployeeController extends Controller
{
    public function __construct(
        private EmployeeService $employeeService
    ) {}

    /**
     * 사원 목록 조회 (HTMX → HTML / 일반 → JSON)
     */
    public function index(Request $request): JsonResponse|Response
    {
        $employees = $this->employeeService->getEmployees(
            $request->all(),
            $request->integer('per_page', 20)
        );

        if ($request->header('HX-Request')) {
            return response(view('hr.employees.partials.table', compact('employees')));
        }

        return response()->json([
            'success' => true,
            'data' => $employees->items(),
            'meta' => [
                'current_page' => $employees->currentPage(),
                'last_page' => $employees->lastPage(),
                'per_page' => $employees->perPage(),
                'total' => $employees->total(),
            ],
        ]);
    }

    /**
     * 기존 사용자 검색 (사원 미등록, 테넌트 소속)
     */
    public function searchUsers(Request $request): JsonResponse
    {
        $users = $this->employeeService->searchTenantUsers($request->get('q') ?? '');

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

    /**
     * 사원 통계
     */
    public function stats(): JsonResponse
    {
        $stats = $this->employeeService->getStats();

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

    /**
     * 사원 등록
     */
    public function store(Request $request): JsonResponse
    {
        $rules = [
            'existing_user_id' => 'nullable|integer|exists:users,id',
            'name' => 'required|string|max:50',
            'email' => 'nullable|email|max:100',
            'phone' => 'nullable|string|max:20',
            'department_id' => 'nullable|integer|exists:departments,id',
            'position_key' => 'nullable|string|max:50',
            'job_title_key' => 'nullable|string|max:50',
            'work_location_key' => 'nullable|string|max:50',
            'employment_type_key' => 'nullable|string|max:50',
            'employee_status' => 'nullable|string|in:active,leave,resigned',
            'manager_user_id' => 'nullable|integer|exists:users,id',
            'display_name' => 'nullable|string|max:50',
            'hire_date' => 'nullable|date',
            'resign_date' => 'nullable|date',
            'address' => 'nullable|string|max:200',
            'emergency_contact' => 'nullable|string|max:100',
            'resident_number' => 'nullable|string|max:14',
            'bank_account.bank_code' => 'nullable|string|max:20',
            'bank_account.bank_name' => 'nullable|string|max:50',
            'bank_account.account_holder' => 'nullable|string|max:50',
            'bank_account.account_number' => 'nullable|string|max:30',
            'dependents' => 'nullable|array',
            'dependents.*.name' => 'required_with:dependents|string|max:50',
            'dependents.*.nationality' => 'nullable|string|in:korean,foreigner',
            'dependents.*.resident_number' => 'nullable|string|max:14',
            'dependents.*.relationship' => 'nullable|string|max:20',
            'dependents.*.is_disabled' => 'nullable|boolean',
            'dependents.*.is_dependent' => 'nullable|boolean',
        ];

        // 신규 사용자일 때만 이메일 unique 검증
        if (! $request->filled('existing_user_id')) {
            $rules['email'] = 'nullable|email|max:100|unique:users,email';
        }

        $validated = $request->validate($rules);

        try {
            $employee = $this->employeeService->createEmployee($validated);

            return response()->json([
                'success' => true,
                'message' => '사원이 등록되었습니다.',
                'data' => $employee,
            ], 201);
        } catch (\Throwable $e) {
            report($e);

            return response()->json([
                'success' => false,
                'message' => '사원 등록 중 오류가 발생했습니다.',
                'error' => config('app.debug') ? $e->getMessage() : null,
            ], 500);
        }
    }

    /**
     * 사원 상세 조회
     */
    public function show(int $id): JsonResponse
    {
        $employee = $this->employeeService->getEmployeeById($id);

        if (! $employee) {
            return response()->json([
                'success' => false,
                'message' => '사원 정보를 찾을 수 없습니다.',
            ], 404);
        }

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

    /**
     * 사원 수정
     */
    public function update(Request $request, int $id): JsonResponse
    {
        $validated = $request->validate([
            'name' => 'sometimes|required|string|max:50',
            'email' => 'nullable|email|max:100',
            'phone' => 'nullable|string|max:20',
            'department_id' => 'nullable|integer|exists:departments,id',
            'position_key' => 'nullable|string|max:50',
            'job_title_key' => 'nullable|string|max:50',
            'work_location_key' => 'nullable|string|max:50',
            'employment_type_key' => 'nullable|string|max:50',
            'employee_status' => 'nullable|string|in:active,leave,resigned',
            'manager_user_id' => 'nullable|integer|exists:users,id',
            'display_name' => 'nullable|string|max:50',
            'hire_date' => 'nullable|date',
            'resign_date' => 'nullable|date',
            'address' => 'nullable|string|max:200',
            'emergency_contact' => 'nullable|string|max:100',
            'resident_number' => 'nullable|string|max:14',
            'bank_account.bank_code' => 'nullable|string|max:20',
            'bank_account.bank_name' => 'nullable|string|max:50',
            'bank_account.account_holder' => 'nullable|string|max:50',
            'bank_account.account_number' => 'nullable|string|max:30',
            'dependents' => 'nullable|array',
            'dependents.*.name' => 'required_with:dependents|string|max:50',
            'dependents.*.nationality' => 'nullable|string|in:korean,foreigner',
            'dependents.*.resident_number' => 'nullable|string|max:14',
            'dependents.*.relationship' => 'nullable|string|max:20',
            'dependents.*.is_disabled' => 'nullable|boolean',
            'dependents.*.is_dependent' => 'nullable|boolean',
        ]);

        try {
            $employee = $this->employeeService->updateEmployee($id, $validated);

            if (! $employee) {
                return response()->json([
                    'success' => false,
                    'message' => '사원 정보를 찾을 수 없습니다.',
                ], 404);
            }

            return response()->json([
                'success' => true,
                'message' => '사원 정보가 수정되었습니다.',
                'data' => $employee,
            ]);
        } catch (\Throwable $e) {
            report($e);

            return response()->json([
                'success' => false,
                'message' => '사원 수정 중 오류가 발생했습니다.',
                'error' => config('app.debug') ? $e->getMessage() : null,
            ], 500);
        }
    }

    /**
     * 사원 삭제 (퇴직 처리)
     */
    public function destroy(Request $request, int $id): JsonResponse|Response
    {
        try {
            $result = $this->employeeService->deleteEmployee($id);

            if (! $result) {
                if ($request->header('HX-Request')) {
                    return response()->json([
                        'success' => false,
                        'message' => '사원 정보를 찾을 수 없습니다.',
                    ], 404);
                }

                return response()->json([
                    'success' => false,
                    'message' => '사원 정보를 찾을 수 없습니다.',
                ], 404);
            }

            if ($request->header('HX-Request')) {
                $employees = $this->employeeService->getEmployees($request->all(), $request->integer('per_page', 20));

                return response(view('hr.employees.partials.table', compact('employees')));
            }

            return response()->json([
                'success' => true,
                'message' => '퇴직 처리되었습니다.',
            ]);
        } catch (\Throwable $e) {
            report($e);

            return response()->json([
                'success' => false,
                'message' => '퇴직 처리 중 오류가 발생했습니다.',
                'error' => config('app.debug') ? $e->getMessage() : null,
            ], 500);
        }
    }

    /**
     * 사원 첨부파일 업로드
     */
    public function uploadFile(Request $request, int $id): JsonResponse
    {
        $employee = $this->employeeService->getEmployeeById($id);
        if (! $employee) {
            return response()->json(['success' => false, 'message' => '사원 정보를 찾을 수 없습니다.'], 404);
        }

        $request->validate([
            'files' => 'required|array|max:10',
            'files.*' => 'file|max:20480',
        ]);

        $tenantId = session('selected_tenant_id');
        $uploaded = [];

        foreach ($request->file('files') as $file) {
            $storedName = Str::random(40).'.'.$file->getClientOriginalExtension();
            $path = "tenants/{$tenantId}/employees/{$employee->id}";
            $file->storeAs($path, $storedName, 'tenant');

            $fileRecord = File::create([
                'tenant_id' => $tenantId,
                'document_id' => $employee->id,
                'document_type' => 'employee_profile',
                'original_name' => $file->getClientOriginalName(),
                'stored_name' => $storedName,
                'file_path' => $path.'/'.$storedName,
                'mime_type' => $file->getMimeType(),
                'file_size' => $file->getSize(),
                'file_type' => strtolower($file->getClientOriginalExtension()),
                'uploaded_by' => auth()->id(),
                'created_by' => auth()->id(),
            ]);

            $uploaded[] = $fileRecord;
        }

        return response()->json([
            'success' => true,
            'message' => count($uploaded).'개 파일이 업로드되었습니다.',
            'data' => $uploaded,
        ], 201);
    }

    /**
     * 사원 첨부파일 삭제
     */
    public function deleteFile(int $id, int $fileId): JsonResponse
    {
        $tenantId = session('selected_tenant_id');

        $file = File::where('id', $fileId)
            ->where('document_id', $id)
            ->where('document_type', 'employee_profile')
            ->where('tenant_id', $tenantId)
            ->first();

        if (! $file) {
            return response()->json(['success' => false, 'message' => '파일을 찾을 수 없습니다.'], 404);
        }

        Storage::disk('tenant')->delete($file->file_path);
        $file->delete();

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

    /**
     * 사원 첨부파일 다운로드
     */
    public function downloadFile(int $id, int $fileId)
    {
        $tenantId = session('selected_tenant_id');

        $file = File::where('id', $fileId)
            ->where('document_id', $id)
            ->where('document_type', 'employee_profile')
            ->where('tenant_id', $tenantId)
            ->first();

        if (! $file) {
            abort(404, '파일을 찾을 수 없습니다.');
        }

        $disk = Storage::disk('tenant');
        if (! $disk->exists($file->file_path)) {
            abort(404, '파일이 서버에 존재하지 않습니다.');
        }

        return $disk->download($file->file_path, $file->original_name);
    }

    /**
     * 직급/직책 추가
     */
    public function storePosition(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'type' => 'required|string|in:rank,title',
            'name' => 'required|string|max:50',
        ]);

        $position = $this->employeeService->createPosition($validated['type'], $validated['name']);

        return response()->json([
            'success' => true,
            'message' => ($validated['type'] === 'rank' ? '직급' : '직책').'이 추가되었습니다.',
            'data' => [
                'id' => $position->id,
                'key' => $position->key,
                'name' => $position->name,
            ],
        ], 201);
    }
}