// 表白墙数据管理：对接后端接口
// 点赞去重用 localStorage 记录已点过的表白 id（演示用，防止同设备重复点赞）
import { api } from '../api/index.js'

const LIKED_KEY = 'xpx_liked_confessions'

// 拉取表白列表（仅后端已审核通过的）
export async function fetchConfessions() {
  const res = await api.getConfessions({ pageSize: 50 })
  return (res && res.list) || []
}

// 表白详情（含评论）
export async function fetchConfession(id) {
  return await api.getConfession(id)
}

// 发布表白（后端置为待审核）
export async function publishConfession(payload) {
  return await api.publishConfession(payload)
}

// 点赞（成功后本地记录，避免重复点）
export async function likeConfession(id) {
  const res = await api.likeConfession(id)
  addLiked(id)
  return res && res.likes
}

// 发表评论
export async function commentConfession(id, payload) {
  return await api.commentConfession(id, payload)
}

// —— 本地点赞记录 ——
export function getLikedSet() {
  try {
    return new Set(JSON.parse(localStorage.getItem(LIKED_KEY) || '[]'))
  } catch (e) {
    return new Set()
  }
}
export function hasLiked(id) {
  return getLikedSet().has(id)
}
function addLiked(id) {
  try {
    const s = getLikedSet()
    s.add(id)
    localStorage.setItem(LIKED_KEY, JSON.stringify([...s]))
  } catch (e) {
    /* ignore */
  }
}

// 相对时间格式化：刚刚 / x分钟前 / x小时前 / 昨天 / MM-DD
export function formatTime(iso) {
  const t = new Date(iso).getTime()
  if (!t) return ''
  const diff = Date.now() - t
  const min = 60 * 1000
  const hr = 60 * min
  const day = 24 * hr
  if (diff < min) return '刚刚'
  if (diff < hr) return `${Math.floor(diff / min)}分钟前`
  if (diff < day) return `${Math.floor(diff / hr)}小时前`
  if (diff < 2 * day) return '昨天'
  const d = new Date(t)
  const p = (n) => String(n).padStart(2, '0')
  return `${p(d.getMonth() + 1)}-${p(d.getDate())}`
}

// 卡片配色主题（供墙页与详情页共用）
export const THEMES = [
  { bg: 'linear-gradient(135deg, #fff1f4, #ffe1ea)', accent: '#ff5c8a' },
  { bg: 'linear-gradient(135deg, #fff7e8, #ffe9c9)', accent: '#ff9f2e' },
  { bg: 'linear-gradient(135deg, #eefaf1, #d8f3e0)', accent: '#22c55e' },
  { bg: 'linear-gradient(135deg, #eef4ff, #dbe7ff)', accent: '#1677ff' },
  { bg: 'linear-gradient(135deg, #eafaff, #cdeffb)', accent: '#0fc6c2' }
]
export function themeAt(i) {
  return THEMES[Number(i) || 0] || THEMES[0]
}