<?php

namespace App\Services\Automation;

class AutomationFingerprint
{
    public function make(string $triggerType, array $triggerConfig, array $conditions): string
    {
        $cfg = [
            'event' => (string) ($triggerConfig['event'] ?? ''),
            'delay_hours' => (int) ($triggerConfig['delay_hours'] ?? 0),
            'every_days' => (int) ($triggerConfig['every_days'] ?? 1),
            'step_toman' => (float) ($triggerConfig['step_toman'] ?? 0),
            'direction' => (string) ($triggerConfig['direction'] ?? ''),
            'product_id' => (int) ($triggerConfig['product_id'] ?? 0),
            'price_window' => (string) ($triggerConfig['price_window'] ?? 'calendar_day'),
        ];

        $norm = [];
        foreach ($conditions as $row) {
            if (! is_array($row) || empty($row['field'])) {
                continue;
            }
            $norm[] = [
                'field' => (string) $row['field'],
                'op' => (string) ($row['op'] ?? ''),
                'value' => $row['value'] ?? null,
            ];
        }
        usort($norm, fn ($a, $b) => strcmp($a['field'].$a['op'], $b['field'].$b['op']));

        $payload = [
            't' => $triggerType,
            'cfg' => $cfg,
            'c' => $norm,
        ];

        return hash('sha256', json_encode($payload, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES));
    }
}