import {
	type DomainError,
	type DomainEvent,
	editPlayerCharacter,
	isDomainError,
	type PlayerCharacterId,
} from "@initiative/domain";
import type { PlayerCharacterStore } from "./ports.js";

interface EditFields {
	readonly name?: string;
	readonly ac?: number;
	readonly maxHp?: number;
	readonly color?: string | null;
	readonly icon?: string | null;
}

export function editPlayerCharacterUseCase(
	store: PlayerCharacterStore,
	id: PlayerCharacterId,
	fields: EditFields,
): DomainEvent[] | DomainError {
	const characters = store.getAll();
	const result = editPlayerCharacter(characters, id, fields);

	if (isDomainError(result)) {
		return result;
	}

	store.save([...result.characters]);
	return result.events;
}