/**
 * Soul创业实验 - 工具函数
 */

// 格式化时间
const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : `0${n}`
}

// 格式化日期
const formatDate = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  return `${year}-${formatNumber(month)}-${formatNumber(day)}`
}

// 格式化金额
const formatMoney = (amount, decimals = 2) => {
  return Number(amount).toFixed(decimals)
}

/** 「我的」等页统计数字展示：非法值→0；≥1 万可缩写为「x万」 */
const formatStatNum = (n) => {
  const x = Number(n)
  if (Number.isNaN(x) || !Number.isFinite(x)) return '0'
  const v = Math.floor(x)
  if (v >= 10000) {
    const w = v / 10000
    const s = w >= 10 ? String(Math.floor(w)) : String(Math.round(w * 10) / 10).replace(/\.0$/, '')
    return s + '万'
  }
  return String(v)
}

// 防抖函数
const debounce = (fn, delay = 300) => {
  let timer = null
  return function (...args) {
    if (timer) clearTimeout(timer)
    timer = setTimeout(() => {
      fn.apply(this, args)
    }, delay)
  }
}

// 节流函数
const throttle = (fn, delay = 300) => {
  let last = 0
  return function (...args) {
    const now = Date.now()
    if (now - last >= delay) {
      fn.apply(this, args)
      last = now
    }
  }
}

// 生成唯一ID
const generateId = () => {
  return 'id_' + Date.now().toString(36) + Math.random().toString(36).substr(2)
}

// 检查手机号格式
const isValidPhone = phone => {
  return /^1[3-9]\d{9}$/.test(phone)
}

// 检查微信号格式
const isValidWechat = wechat => {
  return wechat && wechat.length >= 6 && wechat.length <= 20
}

// 深拷贝
const deepClone = obj => {
  if (obj === null || typeof obj !== 'object') return obj
  if (obj instanceof Date) return new Date(obj)
  if (obj instanceof Array) return obj.map(item => deepClone(item))
  if (obj instanceof Object) {
    const copy = {}
    Object.keys(obj).forEach(key => {
      copy[key] = deepClone(obj[key])
    })
    return copy
  }
}

// 获取URL参数
const getQueryParams = url => {
  const params = {}
  const queryString = url.split('?')[1]
  if (queryString) {
    queryString.split('&').forEach(pair => {
      const [key, value] = pair.split('=')
      params[decodeURIComponent(key)] = decodeURIComponent(value || '')
    })
  }
  return params
}

// 存储操作
const storage = {
  get(key) {
    try {
      return wx.getStorageSync(key)
    } catch (e) {
      console.error('获取存储失败:', e)
      return null
    }
  },
  set(key, value) {
    try {
      wx.setStorageSync(key, value)
      return true
    } catch (e) {
      console.error('设置存储失败:', e)
      return false
    }
  },
  remove(key) {
    try {
      wx.removeStorageSync(key)
      return true
    } catch (e) {
      console.error('删除存储失败:', e)
      return false
    }
  },
  clear() {
    try {
      wx.clearStorageSync()
      return true
    } catch (e) {
      console.error('清除存储失败:', e)
      return false
    }
  }
}

// 显示Toast
const showToast = (title, icon = 'none', duration = 2000) => {
  wx.showToast({ title, icon, duration })
}

// 显示Loading
const showLoading = (title = '加载中...') => {
  wx.showLoading({ title, mask: true })
}

// 隐藏Loading
const hideLoading = () => {
  wx.hideLoading()
}

// 修复图片 URL 中 protocol 缺少冒号的问题（如 "https//..." → "https://..."）
const normalizeImageUrl = (url) => {
  if (!url || typeof url !== 'string') return ''
  let s = url.trim()
  if (!s) return ''
  s = s.replace(/^(https?)\/\//, '$1://')
  return s
}

// 显示确认框
const showConfirm = (title, content) => {
  return new Promise((resolve) => {
    wx.showModal({
      title,
      content,
      success: res => resolve(res.confirm)
    })
  })
}

/**
 * 从头像 URL 提取路径部分（不含域名），用于保存到后端
 * 例如：https://xxx.com/uploads/avatars/1.jpg → /uploads/avatars/1.jpg
 * @param {string} url - 完整 URL 或路径
 * @returns {string}
 */
const toAvatarPath = url => {
  if (!url || typeof url !== 'string') return url || ''
  const idx = url.indexOf('/uploads/')
  if (idx >= 0) return url.substring(idx)
  if (url.startsWith('/')) return url
  return url
}

/**
 * chooseAvatar 返回的 avatarUrl 常为 http(s)://tmp/... ，渲染层可用的临时路径，但 wx.uploadFile 需本地文件路径。
 * 约定：网络地址先 wx.downloadFile 得到 tempFilePath；已是 wxfile:// 则直接上传。
 *
 * @param {string} avatarUrl
 * @returns {Promise<string>}
 */
function resolveChooseAvatarFilePath(avatarUrl) {
  return new Promise((resolve, reject) => {
    if (!avatarUrl || typeof avatarUrl !== 'string') {
      reject(new Error('无效的头像路径'))
      return
    }
    const trimmed = avatarUrl.trim()
    if (!trimmed) {
      reject(new Error('无效的头像路径'))
      return
    }
    if (trimmed.startsWith('wxfile://')) {
      resolve(trimmed)
      return
    }
    if (/^https?:\/\//i.test(trimmed)) {
      wx.downloadFile({
        url: trimmed,
        success: res => {
          if (res.statusCode === 200 && res.tempFilePath) resolve(res.tempFilePath)
          else {
            wx.getImageInfo({
              src: trimmed,
              success: img => {
                if (img.path) resolve(img.path)
                else reject(new Error('图片获取失败'))
              },
              fail: () => reject(new Error('图片获取失败')),
            })
          }
        },
        fail: () => {
          wx.getImageInfo({
            src: trimmed,
            success: img => {
              if (img.path) resolve(img.path)
              else reject(new Error('图片获取失败'))
            },
            fail: () => reject(new Error('图片获取失败')),
          })
        },
      })
      return
    }
    resolve(trimmed)
  })
}

/**
 * 相册/相机选头像用本地路径（供 wx.uploadFile），避开开发者工具里 chooseAvatar → http://tmp 渲染失败。
 * 优先 chooseMedia，低版本兜底 chooseImage。
 * @returns {Promise<string>}
 */
function pickLocalAvatarImagePath() {
  return new Promise((resolve, reject) => {
    const fail = err => {
      const em = (err && (err.errMsg || err.message)) || ''
      const s = String(em)
      if (s.includes('cancel') || s.includes('取消')) reject(Object.assign(err || {}, { cancelled: true }))
      else reject(err || new Error('选择图片失败'))
    }
    if (typeof wx.chooseMedia === 'function') {
      wx.chooseMedia({
        count: 1,
        mediaType: ['image'],
        sourceType: ['album', 'camera'],
        sizeType: ['compressed'],
        success: res => {
          const files = res.tempFiles || []
          const p = files[0] && files[0].tempFilePath
          if (p) resolve(p)
          else reject(new Error('未选择图片'))
        },
        fail,
      })
      return
    }
    if (typeof wx.chooseImage === 'function') {
      wx.chooseImage({
        count: 1,
        sizeType: ['compressed'],
        sourceType: ['album', 'camera'],
        success: res => {
          const arr = res.tempFilePaths || []
          if (arr[0]) resolve(arr[0])
          else reject(new Error('未选择图片'))
        },
        fail,
      })
      return
    }
    reject(new Error('当前环境不支持选择图片'))
  })
}

module.exports = {
  formatTime,
  formatDate,
  formatMoney,
  formatStatNum,
  formatNumber,
  debounce,
  throttle,
  generateId,
  isValidPhone,
  isValidWechat,
  deepClone,
  getQueryParams,
  normalizeImageUrl,
  storage,
  showToast,
  showLoading,
  hideLoading,
  showConfirm,
  toAvatarPath,
  resolveChooseAvatarFilePath,
  pickLocalAvatarImagePath,
}