<?php

namespace App\Http\Controllers;

use App\Models\Submission;
use App\Models\SubmissionAnswer;
use App\Services\SubmissionWorkflowService;
use Illuminate\Http\Request;
use Illuminate\Validation\Rule;

class SubmissionReviewController extends Controller
{
    public function __construct(protected SubmissionWorkflowService $workflow) {}

    /** Tukar status serahan. Status 'selesai' & 'pembetulan_perunding' ada syarat tambahan. */
    public function updateStatus(Request $request, Submission $submission)
    {
        $this->authorize('review', $submission);

        $data = $request->validate([
            'status' => ['required', Rule::in(array_keys(Submission::STATUSES))],
            'notes' => ['nullable', 'string', 'max:1000'],
            // Wajib jika status = selesai: tarikh hardcopy dihantar ke Bahagian Kawalan Perancangan.
            'hardcopy_sent_date' => ['nullable', 'required_if:status,selesai', 'date'],
        ], [], ['hardcopy_sent_date' => 'tarikh hardcopy dihantar ke Bahagian Kawalan Perancangan']);

        // Status 'pembetulan_perunding' mesti melalui panel permohonan pembetulan.
        if ($data['status'] === 'pembetulan_perunding' && ! $submission->correctionRequests()->where('status', 'terbuka')->exists()) {
            return back()->with('error', 'Sila tambah sekurang-kurangnya satu permohonan pembetulan (no muka surat, lokasi & penerangan) sebelum menetapkan status Pembetulan Perunding.');
        }

        $extra = [];
        if ($data['status'] === 'selesai') {
            $extra['hardcopy_sent_date'] = $data['hardcopy_sent_date'];
        }

        $this->workflow->changeStatus($submission, $data['status'], auth()->user(), $data['notes'] ?? null, $extra);

        return back()->with('success', 'Status serahan dikemas kini.');
    }

    public function assignOfficer(Request $request, Submission $submission)
    {
        $this->authorize('review', $submission);

        $data = $request->validate(['assigned_officer_id' => ['nullable', 'exists:users,id']]);
        $submission->update(['assigned_officer_id' => $data['assigned_officer_id'] ?? null]);

        activity('serahan')->performedOn($submission)->causedBy(auth()->user())
            ->log('Pegawai bertanggungjawab dikemas kini');

        return back()->with('success', 'Pegawai bertanggungjawab dikemas kini.');
    }

    public function lock(Request $request, Submission $submission)
    {
        $this->authorize('lock', $submission);

        $data = $request->validate(['lock_reason' => ['nullable', 'string', 'max:500']]);
        $this->workflow->lock($submission, auth()->user(), $data['lock_reason'] ?? null);

        return back()->with('success', 'Serahan telah dikunci. Perunding tidak boleh mengubah sehingga dibuka semula.');
    }

    public function unlock(Request $request, Submission $submission)
    {
        $this->authorize('lock', $submission);

        $data = $request->validate([
            'lock_reason' => ['required', 'string', 'max:500'],
        ], [], ['lock_reason' => 'sebab buka kunci']);

        $this->workflow->unlock($submission, auth()->user(), $data['lock_reason']);

        return back()->with('success', 'Serahan dibuka semula untuk pembetulan oleh perunding.');
    }

    public function markHardcopy(Request $request, Submission $submission)
    {
        $this->authorize('markHardcopy', $submission);

        $data = $request->validate([
            'hardcopy_received' => ['required', 'boolean'],
            'hardcopy_received_date' => ['nullable', 'required_if:hardcopy_received,1', 'date'],
        ], [], ['hardcopy_received_date' => 'tarikh terima salinan keras']);

        $submission->update([
            'hardcopy_received' => $request->boolean('hardcopy_received'),
            'hardcopy_received_date' => $request->boolean('hardcopy_received') ? $data['hardcopy_received_date'] : null,
        ]);

        activity('serahan')->performedOn($submission)->causedBy(auth()->user())
            ->log('Status penerimaan salinan keras dikemas kini');

        return back()->with('success', 'Status salinan keras dikemas kini.');
    }

    public function reviewNote(Request $request, Submission $submission)
    {
        $this->authorize('review', $submission);

        $data = $request->validate(['review_notes' => ['nullable', 'string', 'max:2000']]);
        $submission->update(['review_notes' => $data['review_notes'] ?? null]);

        return back()->with('success', 'Nota semakan disimpan.');
    }

    /** Pegawai mengesahkan / catat nota bagi satu jawapan item. */
    public function reviewAnswer(Request $request, SubmissionAnswer $answer)
    {
        $this->authorize('review', $answer->submission);

        $data = $request->validate([
            'validation_status' => ['required', 'in:belum_semak,sah,tidak_sah'],
            'officer_note' => ['nullable', 'string', 'max:1000'],
        ]);

        $answer->update($data);

        return back()->with('success', 'Semakan item dikemas kini.');
    }
}