<?php

declare(strict_types=1);

namespace KTXT\ProviderImap\Tests\Support;

use KTXM\ProviderImap\Providers\CollectionResource;
use KTXM\ProviderImap\Stores\MailboxStore;

/**
 * In-memory MailboxStore: documents, state, change sequence and a single lock.
 */
final class FakeMailboxStore extends MailboxStore
{
    /** @var array<string, array> */
    public array $documents = [];
    public ?string $lockOwner = null;
    /** Fixed time for listedAt; null = now */
    public ?int $clock = null;

    public function upsert(string $tenantId, string $serviceId, CollectionResource $collection): void
    {
        $name = (string) $collection->identifier();
        $this->documents[$name] = [
            ...($this->documents[$name] ?? self::STATE_DEFAULTS),
            ...$collection->toCacheMeta(),
            'listedAt' => $this->clock ?? time(),
        ];
    }

    public function fetch(string $serviceId, string $name): ?array
    {
        return $this->documents[$name] ?? null;
    }

    public function list(string $serviceId): array
    {
        return $this->documents;
    }

    public function updateState(string $serviceId, string $name, array $state): void
    {
        $this->documents[$name] = array_replace($this->documents[$name], array_intersect_key($state, self::STATE_DEFAULTS));
    }

    public function acquireLock(string $serviceId, string $name, string $owner, int $ttl): bool
    {
        if ($this->lockOwner !== null && $this->lockOwner !== $owner) {
            return false;
        }
        $this->lockOwner = $owner;
        return true;
    }

    public function releaseLock(string $serviceId, string $name, string $owner): void
    {
        if ($this->lockOwner === $owner) {
            $this->lockOwner = null;
        }
    }

    public function reserveSequence(string $serviceId, string $name, int $count = 1): int
    {
        $this->documents[$name]['changeSeq'] += $count;
        return $this->documents[$name]['changeSeq'] - $count + 1;
    }

    public function state(string $serviceId, string $name): array
    {
        return array_replace(self::STATE_DEFAULTS, array_intersect_key($this->documents[$name] ?? [], self::STATE_DEFAULTS));
    }

    public function listedAt(string $serviceId): ?int
    {
        $times = array_filter(array_column($this->documents, 'listedAt'));
        return $times === [] ? null : max($times);
    }

    public function delete(string $serviceId, string $name): void
    {
        unset($this->documents[$name]);
    }
}