<?php

declare(strict_types=1);

namespace BattleForge\Domain;

use InvalidArgumentException;

final readonly class ObjectiveControl
{
    /** @param array<string, int> $roundsByTeam */
    public function __construct(public array $roundsByTeam)
    {
        foreach ($roundsByTeam as $teamId => $count) {
            if ($teamId === '') {
                throw new InvalidArgumentException('Objective control team id cannot be empty.');
            }
            if ($count < 0) {
                throw new InvalidArgumentException('Objective control count cannot be negative.');
            }
        }
    }

    public static function empty(): self
    {
        return new self([]);
    }

    public function recordRound(string $controllerTeamId): self
    {
        if ($controllerTeamId === '') {
            throw new InvalidArgumentException('Controller team id cannot be empty.');
        }

        $next = $this->roundsByTeam;
        $next[$controllerTeamId] = ($next[$controllerTeamId] ?? 0) + 1;

        return new self($next);
    }

    /** @return array{teamId: string, rounds: int} */
    public function forTeam(string $teamId): array
    {
        return ['teamId' => $teamId, 'rounds' => $this->roundsByTeam[$teamId] ?? 0];
    }
}