<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;
use App\Models\Admin;
use Spatie\Permission\Models\Permission;
use Illuminate\Support\Facades\DB;

class AdminStaffController extends Controller
{
    public function index()
    {
        $staff = Admin::where('type', 'staff')->orderBy('id', 'DESC')->get();
        return view('admin.staff.index', compact('staff'));
    }

    public function create()
    {
        $permissions = Permission::where('guard_name', 'admin')->get()->groupBy(function ($p) {
            return explode('.', $p->name)[0];
        });

        return view('admin.staff.create', compact('permissions'));
    }

    public function store(Request $request)
    {
        $request->validate([
            // Personal Info
            'name'            => 'required|string|max:255',
            'email'           => 'required|email|unique:admins,email',
            'phone'           => 'required|string|max:20',
            'emergency_phone' => 'nullable|string|max:20',
            'address'         => 'nullable|string|max:255',

            // Professional info
            'role'            => 'nullable|string|max:100',
            'department'      => 'nullable|string|max:100',
            'designation'     => 'nullable|string|max:100',
            'joining_date'    => 'nullable|date',
            'status'          => 'required|string|in:active,inactive',
            'additional_info' => 'nullable|string',

            // System access
            'username'        => 'nullable|string|unique:admins,username',
            'password'        => 'required|string|min:6',

            // Permissions
            'permissions'     => 'nullable|array',
        ]);

        DB::beginTransaction();

        try {
            $admin = Admin::create([
                'name'            => $request->name,
                'email'           => $request->email,
                'phone'           => $request->phone,
                'emergency_phone' => $request->emergency_phone,
                'address'         => $request->address,

                'role'            => $request->role,
                'department'      => $request->department,
                'designation'     => $request->designation,
                'joining_date'    => $request->joining_date,
                'status'          => $request->status,
                'additional_info' => $request->additional_info,

                'username'        => $request->username,
                'password'        => Hash::make($request->password),
                'type'            => 'staff',
            ]);

            // Generate EMPLOYEE ID using admin ID (safe)
            $employeeId = 'EMP' . str_pad($admin->id, 4, '0', STR_PAD_LEFT);
            $admin->update(['employee_id' => $employeeId]);

            // Assign permissions (if any)
            if ($request->permissions) {
                $admin->givePermissionTo($request->permissions);
            }

            DB::commit();

            return redirect()->route('admin.staff.index')
                ->with('success', 'Staff created successfully.');

        } catch (\Exception $e) {
            DB::rollBack();
            return back()->withErrors(['error' => $e->getMessage()]);
        }
    }

    public function edit($id)
    {
        $staff = Admin::where('type', 'staff')->findOrFail($id);

        $permissions = Permission::where('guard_name', 'admin')->get()->groupBy(function ($p) {
            return explode('.', $p->name)[0];
        });

        $staffPermissions = $staff->permissions->pluck('name')->toArray();

        return view('admin.staff.edit', compact('staff', 'permissions', 'staffPermissions'));
    }

    public function update(Request $request, $id)
    {
        $staff = Admin::where('type', 'staff')->findOrFail($id);

        $request->validate([
            'name'            => 'required|string|max:255',
            'email'           => 'required|email|unique:admins,email,' . $staff->id,
            'phone'           => 'required|string|max:20',
            'emergency_phone' => 'nullable|string|max:20',
            'address'         => 'nullable|string|max:255',

            'role'            => 'nullable|string|max:100',
            'department'      => 'nullable|string|max:100',
            'designation'     => 'nullable|string|max:100',
            'joining_date'    => 'nullable|date',
            'status'          => 'required|string|in:active,inactive',
            'additional_info' => 'nullable|string',

            'username'        => 'nullable|string|unique:admins,username,' . $staff->id,
            'password'        => 'nullable|string|min:6',

            'permissions'     => 'nullable|array',
        ]);

        DB::beginTransaction();

        try {
            $staff->update([
                'name'            => $request->name,
                'email'           => $request->email,
                'phone'           => $request->phone,
                'emergency_phone' => $request->emergency_phone,
                'address'         => $request->address,

                'role'            => $request->role,
                'department'      => $request->department,
                'designation'     => $request->designation,
                'joining_date'    => $request->joining_date,
                'status'          => $request->status,
                'additional_info' => $request->additional_info,

                'username'        => $request->username,
            ]);

            if ($request->password) {
                $staff->update(['password' => Hash::make($request->password)]);
            }

            $staff->syncPermissions($request->permissions ?? []);

            DB::commit();

            return redirect()->route('admin.staff.index')
                ->with('success', 'Staff updated successfully.');

        } catch (\Exception $e) {
            DB::rollBack();
            return back()->withErrors(['error' => $e->getMessage()]);
        }
    }

    public function destroy($id)
    {
        $staff = Admin::where('type', 'staff')->findOrFail($id);
        $staff->delete();

        return redirect()->route('admin.staff.index')
            ->with('success', 'Staff removed successfully.');
    }
}