<?php

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

use App\Http\Controllers\Controller;
use App\Services\HR\EmployeeService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

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',
            'password' => 'nullable|string|min:6',
            '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',
            'employee_code' => 'nullable|string|max:30',
            'hire_date' => 'nullable|date',
            'address' => 'nullable|string|max:200',
            'emergency_contact' => 'nullable|string|max:100',
        ];

        // 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',
            'employee_code' => 'nullable|string|max:30',
            'hire_date' => 'nullable|date',
            'address' => 'nullable|string|max:200',
            'emergency_contact' => 'nullable|string|max:100',
        ]);

        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);
        }
    }

    /**
     * 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);
    }
}