<?php
// app/Services/Base/BaseMetricService.php

namespace App\Services\Base;

use App\Contracts\MetricCalculatorInterface;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Log;

abstract class BaseMetricService
{
    protected array $cache = [];
    protected array $config = [];

    abstract protected function getMetricId(): int;
    abstract protected function calculate(array $departmentIds, string $startDate, string $endDate): array;

    public function getCached(array $departmentIds, string $startDate, string $endDate): array
    {
        $cacheKey = $this->getCacheKey($departmentIds, $startDate, $endDate);

        if (isset($this->cache[$cacheKey])) {
            return $this->cache[$cacheKey];
        }

        try {
            $result = $this->calculate($departmentIds, $startDate, $endDate);
            $this->cache[$cacheKey] = $result;
            return $result;
        } catch (\Exception $e) {
            Log::error("Error in " . static::class . ": " . $e->getMessage());
            return array_fill_keys($departmentIds, 0);
        }
    }

    protected function getCacheKey(array $departmentIds, string $startDate, string $endDate): string
    {
        return static::class . '_' . md5(implode(',', $departmentIds) . $startDate . $endDate);
    }

    public function clearCache(): void
    {
        $this->cache = [];
    }
}