/**
 * 本地存储管理工具
 */

/**
 * 存储人员数据
 */
function savePersons(persons) {
  try {
    wx.setStorageSync('persons', persons)
    return true
  } catch (e) {
    console.error('保存人员数据失败', e)
    return false
  }
}

/**
 * 获取人员数据
 */
function getPersons() {
  try {
    return wx.getStorageSync('persons') || []
  } catch (e) {
    console.error('获取人员数据失败', e)
    return []
  }
}

/**
 * 根据ID获取人员
 */
function getPersonById(id) {
  const persons = getPersons()
  return persons.find(p => p.id === id) || null
}

/**
 * 添加人员
 */
function addPerson(person) {
  const persons = getPersons()
  const newPerson = {
    id: generateId(),
    ...person,
    createTime: new Date().getTime(),
    updateTime: new Date().getTime()
  }
  persons.push(newPerson)
  return savePersons(persons) ? newPerson : null
}

/**
 * 更新人员
 */
function updatePerson(id, updates) {
  const persons = getPersons()
  const index = persons.findIndex(p => p.id === id)
  if (index !== -1) {
    persons[index] = {
      ...persons[index],
      ...updates,
      updateTime: new Date().getTime()
    }
    return savePersons(persons)
  }
  return false
}

/**
 * 删除人员
 */
function deletePerson(id) {
  const persons = getPersons()
  const filtered = persons.filter(p => p.id !== id)
  return savePersons(filtered)
}

/**
 * 存储纪念日数据
 */
function saveAnniversaries(anniversaries) {
  try {
    wx.setStorageSync('anniversaries', anniversaries)
    return true
  } catch (e) {
    console.error('保存纪念日数据失败', e)
    return false
  }
}

/**
 * 获取纪念日数据
 */
function getAnniversaries() {
  try {
    return wx.getStorageSync('anniversaries') || []
  } catch (e) {
    console.error('获取纪念日数据失败', e)
    return []
  }
}

/**
 * 根据人员ID获取纪念日
 */
function getAnniversariesByPersonId(personId) {
  const anniversaries = getAnniversaries()
  return anniversaries.filter(a => a.personId === personId)
}

/**
 * 添加纪念日
 */
function addAnniversary(anniversary) {
  const anniversaries = getAnniversaries()
  const newAnniversary = {
    id: generateId(),
    ...anniversary,
    createTime: new Date().getTime(),
    updateTime: new Date().getTime()
  }
  anniversaries.push(newAnniversary)
  return saveAnniversaries(anniversaries) ? newAnniversary : null
}

/**
 * 更新纪念日
 */
function updateAnniversary(id, updates) {
  const anniversaries = getAnniversaries()
  const index = anniversaries.findIndex(a => a.id === id)
  if (index !== -1) {
    anniversaries[index] = {
      ...anniversaries[index],
      ...updates,
      updateTime: new Date().getTime()
    }
    return saveAnniversaries(anniversaries)
  }
  return false
}

/**
 * 删除纪念日
 */
function deleteAnniversary(id) {
  const anniversaries = getAnniversaries()
  const filtered = anniversaries.filter(a => a.id !== id)
  return saveAnniversaries(filtered)
}

/**
 * 生成唯一ID
 */
function generateId() {
  return 'id_' + Date.now() + '_' + Math.random().toString(36).substr(2, 9)
}

/**
 * 导出数据
 */
function exportData() {
  return {
    persons: getPersons(),
    anniversaries: getAnniversaries(),
    exportTime: new Date().getTime()
  }
}

/**
 * 导入数据
 */
function importData(data) {
  try {
    if (data.persons && Array.isArray(data.persons)) {
      wx.setStorageSync('persons', data.persons)
    }
    if (data.anniversaries && Array.isArray(data.anniversaries)) {
      wx.setStorageSync('anniversaries', data.anniversaries)
    }
    return true
  } catch (e) {
    console.error('导入数据失败', e)
    return false
  }
}

/**
 * 清空所有数据
 */
function clearAllData() {
  try {
    wx.clearStorageSync()
    return true
  } catch (e) {
    console.error('清空数据失败', e)
    return false
  }
}

module.exports = {
  // 人员相关
  savePersons,
  getPersons,
  getPersonById,
  addPerson,
  updatePerson,
  deletePerson,
  
  // 纪念日相关
  saveAnniversaries,
  getAnniversaries,
  getAnniversariesByPersonId,
  addAnniversary,
  updateAnniversary,
  deleteAnniversary,
  
  // 工具函数
  exportData,
  importData,
  clearAllData
}