<?php

declare(strict_types=1);

namespace KTXM\ProviderImap\Client;

final class FetchTarget
{
    private function __construct(
        private readonly SequenceSet $sequenceSet,
        private readonly IdentifierMode $identifierMode,
    ) {}

    public static function all(IdentifierMode $identifierMode = IdentifierMode::Sequence): self
    {
        return new self(SequenceSet::all(), $identifierMode);
    }

    public static function sequence(int|string|SequenceSet $target): self
    {
        return new self(self::coerceSequenceSet($target), IdentifierMode::Sequence);
    }

    public static function uid(int|string|SequenceSet $target): self
    {
        return new self(self::coerceSequenceSet($target), IdentifierMode::Uid);
    }

    public function sequenceSet(): SequenceSet
    {
        return $this->sequenceSet;
    }

    public function identifierMode(): IdentifierMode
    {
        return $this->identifierMode;
    }

    public function toCommand(): string
    {
        return $this->identifierMode->toCommand();
    }

    private static function coerceSequenceSet(int|string|SequenceSet $target): SequenceSet
    {
        return match (true) {
            $target instanceof SequenceSet => $target,
            is_int($target) => SequenceSet::single($target),
            default => SequenceSet::parse($target),
        };
    }
}