<?php

namespace App\Http\Controllers;

use App\Http\Requests\DataCentreRequest;
use App\Models\Consultant;
use App\Models\DataCentre;
use App\Services\AssignmentService;
use Illuminate\Http\Request;

class DataCentreController extends Controller
{
    public function __construct(protected AssignmentService $assignmentService) {}

    public function index(Request $request)
    {
        $this->authorize('viewAny', DataCentre::class);

        $user = auth()->user();
        $query = DataCentre::query()->with('currentConsultant');

        // Perunding hanya lihat pusat data yang ditugaskan kepadanya.
        if ($user->isPerunding() && ! $user->can('pusat_data.urus')) {
            $query->where('current_consultant_id', $user->consultant?->id ?? 0);
        }

        if ($search = $request->string('cari')->toString()) {
            $query->where('nama_pusat_data', 'like', "%$search%")
                ->orWhere('tajuk_permohonan', 'like', "%$search%");
        }

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

        $dataCentres = $query->orderBy('nama_pusat_data')->paginate(15)->withQueryString();

        return view('data_centres.index', compact('dataCentres'));
    }

    public function create()
    {
        $this->authorize('create', DataCentre::class);

        return view('data_centres.create', ['dataCentre' => new DataCentre]);
    }

    public function store(DataCentreRequest $request)
    {
        $dataCentre = DataCentre::create($request->validated());

        return redirect()->route('data-centres.show', $dataCentre)
            ->with('success', 'Pusat data berjaya didaftarkan.');
    }

    public function show(DataCentre $dataCentre)
    {
        $this->authorize('view', $dataCentre);

        $dataCentre->load([
            'currentConsultant',
            'assignments.consultant',
            'assignments.assignedBy',
            'submissions.reportingCycle',
        ]);
        $consultants = Consultant::aktif()->orderBy('nama_perunding')->get();

        return view('data_centres.show', compact('dataCentre', 'consultants'));
    }

    public function edit(DataCentre $dataCentre)
    {
        $this->authorize('update', $dataCentre);

        return view('data_centres.edit', compact('dataCentre'));
    }

    public function update(DataCentreRequest $request, DataCentre $dataCentre)
    {
        $this->authorize('update', $dataCentre);

        $dataCentre->update($request->validated());

        return redirect()->route('data-centres.show', $dataCentre)
            ->with('success', 'Maklumat pusat data dikemas kini.');
    }

    public function destroy(DataCentre $dataCentre)
    {
        $this->authorize('delete', $dataCentre);

        $dataCentre->delete();

        return redirect()->route('data-centres.index')
            ->with('success', 'Pusat data telah dipadam.');
    }

    /** Tugaskan / tukar perunding aktif untuk pusat data. */
    public function assign(Request $request, DataCentre $dataCentre)
    {
        $this->authorize('assignConsultant', $dataCentre);

        $data = $request->validate([
            'consultant_id' => ['required', 'exists:consultants,id'],
            'start_date' => ['nullable', 'date'],
            'reason' => ['nullable', 'string', 'max:500'],
        ], [], ['consultant_id' => 'perunding', 'reason' => 'sebab']);

        $consultant = Consultant::findOrFail($data['consultant_id']);

        $this->assignmentService->assign(
            $dataCentre,
            $consultant,
            auth()->user(),
            $data['start_date'] ?? null,
            $data['reason'] ?? null
        );

        return redirect()->route('data-centres.show', $dataCentre)
            ->with('success', 'Perunding berjaya ditugaskan. Penugasan terdahulu (jika ada) telah ditamatkan.');
    }

    public function endAssignment(Request $request, DataCentre $dataCentre)
    {
        $this->authorize('assignConsultant', $dataCentre);

        $data = $request->validate(['reason' => ['nullable', 'string', 'max:500']]);

        $this->assignmentService->endActive($dataCentre, auth()->user(), $data['reason'] ?? null);

        return redirect()->route('data-centres.show', $dataCentre)
            ->with('success', 'Penugasan perunding aktif telah ditamatkan.');
    }
}