<?php

namespace App\Reports;

use App\Models\Activity;
use App\Reports\Contracts\Report;
use Illuminate\Database\Eloquent\Builder;

class DecisionsCountReport extends BaseEloquentReport implements Report
{
    public function slug(): string
    {
        return 'decisions-counts';
    }

    public function name(): string
    {
        return 'Odločitve – štetje';
    }

    public function description(): ?string
    {
        return 'Število aktivnosti po odločitvah v izbranem obdobju.';
    }

    public function inputs(): array
    {
        return [
            ['key' => 'from', 'type' => 'date', 'label' => 'Od', 'nullable' => true],
            ['key' => 'to', 'type' => 'date', 'label' => 'Do', 'nullable' => true],
        ];
    }

    public function columns(): array
    {
        return [
            ['key' => 'decision_name', 'label' => 'Odločitev'],
            ['key' => 'activities_count', 'label' => 'Št. aktivnosti'],
        ];
    }

    public function query(array $filters): Builder
    {
        return Activity::query()
            ->leftJoin('decisions', 'activities.decision_id', '=', 'decisions.id')
            ->when(!empty($filters['from']), fn ($q) => $q->whereDate('activities.created_at', '>=', $filters['from']))
            ->when(!empty($filters['to']), fn ($q) => $q->whereDate('activities.created_at', '<=', $filters['to']))
            ->groupBy('decisions.name')
            ->selectRaw("COALESCE(decisions.name, '—') as decision_name, COUNT(*) as activities_count");
    }
}