<?php

namespace App\Temporal\ExternalApiSync;

use App\Models\Product;
use App\Temporal\Shared\FaultSimulator;
use Illuminate\Support\Str;
use Temporal\Activity;

class ExternalApiSyncActivity implements ExternalApiSyncActivityInterface
{
    private const PAGE_SIZE = 10;
    private const TOTAL_SIMULATED_RECORDS = 50;

    public function refreshToken(array $simulationConfig = []): string
    {
        FaultSimulator::maybeApply($simulationConfig, 'refreshToken');

        // Simulate OAuth token refresh
        usleep(200000);

        return 'tok_' . Str::random(32);
    }

    public function fetchPage(string $cursor, string $token, array $simulationConfig = []): array
    {
        FaultSimulator::maybeApply($simulationConfig, 'fetchPage');

        Activity::heartbeat(['cursor' => $cursor, 'token_prefix' => substr($token, 0, 8)]);

        // Simulate API latency
        usleep(150000);

        $offset = (int) $cursor;
        $records = [];

        for ($i = $offset; $i < min($offset + self::PAGE_SIZE, self::TOTAL_SIMULATED_RECORDS); $i++) {
            $records[] = [
                'external_id' => 'EXT-' . str_pad((string) ($i + 1), 5, '0', STR_PAD_LEFT),
                'name' => 'Synced Product ' . ($i + 1),
                'description' => 'Product synced from external API',
                'price' => round(mt_rand(500, 50000) / 100, 2),
                'stock' => mt_rand(10, 500),
                'category' => ['Electronics', 'Clothing', 'Home & Garden', 'Sports'][array_rand(['Electronics', 'Clothing', 'Home & Garden', 'Sports'])],
            ];
        }

        $nextOffset = $offset + self::PAGE_SIZE;
        $hasMore = $nextOffset < self::TOTAL_SIMULATED_RECORDS;

        return [
            'records' => $records,
            'nextCursor' => (string) $nextOffset,
            'hasMore' => $hasMore,
            'attempt' => Activity::getInfo()->attempt,
        ];
    }

    public function transformAndStore(array $records, array $simulationConfig = []): array
    {
        FaultSimulator::maybeApply($simulationConfig, 'transformAndStore');

        $stored = 0;
        $skipped = 0;

        foreach ($records as $record) {
            $sku = 'SYNC-' . $record['external_id'];

            try {
                Product::updateOrCreate(
                    ['sku' => $sku],
                    [
                        'name' => $record['name'],
                        'description' => $record['description'],
                        'price' => $record['price'],
                        'stock_quantity' => $record['stock'],
                        'category' => $record['category'],
                        'status' => 'active',
                        'imported_at' => now(),
                    ]
                );
                $stored++;
            } catch (\Throwable) {
                $skipped++;
            }
        }

        return [
            'stored' => $stored,
            'skipped' => $skipped,
            'attempt' => Activity::getInfo()->attempt,
        ];
    }
}