/**
 * 投票工具(源自旧项目 utils/vote.js,按需命名导出)
 * 投票状态计算、UID 缓存、投票周期判断
 */
import { getCache, setCache } from './storage';

/** 投票 UID 缓存 key */
const UnihaloVoteUid = 'unihalo_vote_uid';

export type VoteType = 'single' | 'multiple' | 'pk';
export type VoteState = 'not-voted' | 'voting' | 'voted' | 'vote-ended';

/** 投票类型中文映射(与旧项目一致:key 为插件小写 type) */
export const VOTE_TYPES: Record<string, string> = {
	pk: '双选PK',
	multiple: '多选',
	single: '单选'
};

/** 投票状态常量(内部状态机) */
export const VOTE_STATES: { NOT_VOTED: VoteState; VOTING: VoteState; VOTED: VoteState; VOTE_ENDED: VoteState } = {
	NOT_VOTED: 'not-voted',
	VOTING: 'voting',
	VOTED: 'voted',
	VOTE_ENDED: 'vote-ended'
};

/** 投票展示状态(与旧项目 VOTE_STATES 一致:中文 + unocss 文字/背景色类) */
export const VOTE_STATE_LABELS: Record<string, { state: string; color: string; bgColor: string }> = {
	未开始: { state: '未开始', color: 'text-orange-400', bgColor: 'bg-orange-100' },
	进行中: { state: '进行中', color: 'text-green-400', bgColor: 'bg-green-100' },
	已结束: { state: '已结束', color: 'text-red-400', bgColor: 'bg-red-100' }
};

/**
 * 获取投票 UID(不存在则生成)
 */
export function getOrCreateVoteUid(): string {
	let uid = getCache<string>(UnihaloVoteUid);
	if (!uid) {
		uid = `${Date.now()}-${Math.random().toString(36).slice(2, 10)}`;
		setCache(UnihaloVoteUid, uid);
	}
	return uid;
}

/**
 * 计算投票展示状态(与旧项目 calcVoteState 一致)
 * 非 custom 期限(permanent 等)直接看 hasEnded;custom 按起止时间判断
 * @param vote 投票对象(含 spec.timeLimit/hasEnded/startDate/endDate)
 * @returns { state: '未开始' | '进行中' | '已结束', color: unocss 文字色类, bgColor: unocss 背景色类 }
 */
export function calcVoteState(vote: { spec?: { timeLimit?: string; hasEnded?: boolean; startDate?: string; endDate?: string; [key: string]: unknown } }): {
	state: string;
	color: string;
	bgColor: string;
} {
	if (vote.spec?.timeLimit !== 'custom') {
		return vote.spec?.hasEnded ? VOTE_STATE_LABELS['已结束'] : VOTE_STATE_LABELS['进行中'];
	}

	const nowTime = new Date().getTime();
	const startTime = vote.spec?.startDate ? new Date(vote.spec.startDate).getTime() : nowTime;
	const endTime = vote.spec?.endDate ? new Date(vote.spec.endDate).getTime() : nowTime;

	if (nowTime < startTime) {
		return VOTE_STATE_LABELS['未开始'];
	}
	if (nowTime < endTime) {
		return VOTE_STATE_LABELS['进行中'];
	}
	return vote.spec?.hasEnded ? VOTE_STATE_LABELS['已结束'] : VOTE_STATE_LABELS['进行中'];
}

/**
 * 计算选项票数占比(与旧项目一致:整数百分比)
 * @param vote 投票对象(含 stats.voteCount)
 * @param option 选项(含 count)
 */
export function calcVotePercent(vote: { stats?: { voteCount?: number } }, option: { count?: number }): number {
	const total = vote.stats?.voteCount || 0;
	const count = option.count || 0;
	if (total === 0) {
		return 0;
	}
	return Math.round((count / total) * 100);
}

/** 投票缓存 key 前缀 */
const VOTE_CACHE_KEY = 'unihalo_vote_';

interface IVoteCacheData {
	selected: string[];
	data: unknown;
}

/**
 * 投票缓存工具(源自旧项目 utils/vote.js 的 voteCacheUtil)
 */
export const voteCacheUtil = {
	/** 是否已缓存(已投票) */
	has(name: string): boolean {
		return !!getCache<IVoteCacheData>(VOTE_CACHE_KEY + name);
	},
	/** 获取缓存数据 */
	get(name: string): IVoteCacheData | null {
		return getCache<IVoteCacheData>(VOTE_CACHE_KEY + name) || null;
	},
	/** 写入缓存 */
	set(name: string, data: IVoteCacheData): void {
		setCache(VOTE_CACHE_KEY + name, data);
	}
};