import type { PlayerCharacter } from "./player-character-types.js";
import {
	playerCharacterId,
	VALID_PLAYER_COLORS,
	VALID_PLAYER_ICONS,
} from "./player-character-types.js";

function isValidOptionalMember(
	value: unknown,
	valid: ReadonlySet<string>,
): boolean {
	return value === undefined || (typeof value === "string" && valid.has(value));
}

export function rehydratePlayerCharacter(raw: unknown): PlayerCharacter | null {
	if (typeof raw !== "object" || raw === null || Array.isArray(raw))
		return null;
	const entry = raw as Record<string, unknown>;

	if (typeof entry.id !== "string" || entry.id.length === 0) return null;
	if (typeof entry.name !== "string" || entry.name.trim().length === 0)
		return null;
	if (
		typeof entry.ac !== "number" ||
		!Number.isInteger(entry.ac) ||
		entry.ac < 0
	)
		return null;
	if (
		typeof entry.maxHp !== "number" ||
		!Number.isInteger(entry.maxHp) ||
		entry.maxHp < 1
	)
		return null;
	if (!isValidOptionalMember(entry.color, VALID_PLAYER_COLORS)) return null;
	if (!isValidOptionalMember(entry.icon, VALID_PLAYER_ICONS)) return null;
	if (
		entry.level !== undefined &&
		(typeof entry.level !== "number" ||
			!Number.isInteger(entry.level) ||
			entry.level < 1 ||
			entry.level > 20)
	)
		return null;

	return {
		id: playerCharacterId(entry.id),
		name: entry.name,
		ac: entry.ac,
		maxHp: entry.maxHp,
		color: entry.color as PlayerCharacter["color"],
		icon: entry.icon as PlayerCharacter["icon"],
		level: entry.level,
	};
}