<?php

namespace App\Services\Attendance;

use App\Models\Attendance;
use App\Models\Election;
use App\Models\ElectionSetting;
use App\Models\PusatMengundi;
use App\Models\StaffAssignment;
use App\Models\User;
use App\Services\Ppm\PpmScopeService;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;

class AttendanceRecordingService
{
    public function __construct(
        private readonly PpmScopeService $ppmScopeService,
    ) {}

    public function ensureActive(PusatMengundi $pusatMengundi): void
    {
        $election = $pusatMengundi->election;
        $settings = $election instanceof Election ? $election->settings : null;

        if (! $settings instanceof ElectionSetting || ! $settings->is_attendance_active) {
            throw ValidationException::withMessages([
                'attendance' => 'Modul kehadiran belum diaktifkan untuk pilihanraya ini.',
            ]);
        }
    }

    public function ensurePpmCanRecord(User $actor, PusatMengundi $pusatMengundi): void
    {
        if (! $this->ppmScopeService->assignedPusatIds($actor)->contains((int) $pusatMengundi->id)) {
            throw ValidationException::withMessages([
                'pusat_mengundi_id' => 'PPM hanya boleh merekod kehadiran untuk Pusat Mengundi sendiri.',
            ]);
        }
    }

    /**
     * @param  array<int, array{status: string, check_in_time?: string|null, note?: string|null}>  $records
     */
    public function recordBulk(PusatMengundi $pusatMengundi, User $actor, array $records): void
    {
        $this->ensureActive($pusatMengundi);
        $this->ensurePpmCanRecord($actor, $pusatMengundi);

        DB::transaction(function () use ($pusatMengundi, $actor, $records): void {
            $assignments = StaffAssignment::query()
                ->with(['position'])
                ->where('pusat_mengundi_id', $pusatMengundi->id)
                ->where('status', 'active')
                ->whereIn('id', array_keys($records))
                ->get()
                ->keyBy('id');

            foreach ($records as $assignmentId => $record) {
                /** @var StaffAssignment|null $assignment */
                $assignment = $assignments->get((int) $assignmentId);

                if (! $assignment instanceof StaffAssignment) {
                    continue;
                }

                $status = $record['status'];
                $checkInTime = $status === 'present'
                    ? ($record['check_in_time'] ?? now())
                    : null;

                $attendance = Attendance::query()->updateOrCreate(
                    [
                        'election_id' => $assignment->election_id,
                        'staff_assignment_id' => $assignment->id,
                    ],
                    [
                        'pusat_mengundi_id' => $assignment->pusat_mengundi_id,
                        'saluran_mengundi_id' => $assignment->saluran_mengundi_id,
                        'position_id' => $assignment->position_id,
                        'status' => $status,
                        'check_in_time' => $checkInTime,
                        'recorded_by_user_id' => $actor->id,
                        'note' => $record['note'] ?? null,
                    ],
                );

                activity('attendance')
                    ->performedOn($attendance)
                    ->causedBy($actor)
                    ->withProperties([
                        'staff_assignment_id' => $assignment->id,
                        'status' => $status,
                        'check_in_time' => $checkInTime,
                    ])
                    ->log('attendance_updated_by_ppm');
            }
        });
    }
}