/**
 * @Description: Mock 数据生成工具 - 用于测试分页加载功能
 * @Date: 2026-02-08
 *
 * 支持的 API Mock:
 * - weekHotAPI: 周热门资料
 * - fileListAPI: 资料列表
 * - listAPI: 产品列表
 * - searchAPI: 搜索(产品+资料)
 * - myListAPI: 消息列表
 */

// ============================================================================
// 工具函数
// ============================================================================

/**
 * 生成随机文件大小
 * @returns {string} 文件大小(如 "2.5MB")
 */
function generateRandomSize() {
  const sizeInMB = (Math.random() * 10 + 0.5).toFixed(1)
  return `${sizeInMB}MB`
}

/**
 * 生成随机学习人数
 * @returns {number} 学习人数(100-5000之间)
 */
function generateRandomReadCount() {
  return Math.floor(Math.random() * 4900) + 100
}

/**
 * 生成随机学习百分比
 * @returns {number} 学习百分比(0-100之间)
 */
function generateRandomReadPercent() {
  return Math.floor(Math.random() * 100)
}

/**
 * 生成随机收藏状态
 * @returns {string} '1' 或 '0'
 */
function generateRandomFavorite() {
  return Math.random() > 0.7 ? '1' : '0'
}

/**
 * 模拟网络延迟
 * @param {number} min 最小延迟(ms)
 * @param {number} max 最大延迟(ms)
 * @returns {Promise}
 */
function mockDelay(min = 100, max = 300) {
  const delay = Math.random() * (max - min) + min
  return new Promise(resolve => setTimeout(resolve, delay))
}

// ============================================================================
// 1. 周热门资料 Mock (weekHotAPI)
// ============================================================================

const WEEK_HOT_MATERIALS = [
  '财富管理基础知识指南',
  '保险产品销售技巧',
  '客户关系管理实战',
  '家庭资产配置方案',
  '税务筹划实用手册',
  '退休规划完整教程',
  '投资组合管理策略',
  '风险控制与合规要求',
  '高净值客户开发指南',
  '理财产品营销话术',
  '基金定投实战技巧',
  '保单整理服务流程',
  '传承规划案例分析',
  '健康险产品对比分析',
  '年金保险销售指南',
  '重疾险核保知识',
  '教育金规划方案',
  '房贷规划实务操作',
  '家族信托业务介绍',
  '私募股权投资指南'
]

const FILE_TYPES = [
  { extension: 'pdf', name: 'PDF文档' },
  { extension: 'doc', name: 'Word文档' },
  { extension: 'docx', name: 'Word文档' },
  { extension: 'xls', name: 'Excel表格' },
  { extension: 'xlsx', name: 'Excel表格' },
  { extension: 'ppt', name: 'PPT演示文稿' },
  { extension: 'pptx', name: 'PPT演示文稿' },
  { extension: 'txt', name: '文本文件' },
  { extension: 'jpg', name: '图片' },
  { extension: 'png', name: '图片' }
]

/**
 * 生成周热门资料数据
 */
function generateWeekHotItem(id) {
  const fileType = FILE_TYPES[Math.floor(Math.random() * FILE_TYPES.length)]
  const materialName = WEEK_HOT_MATERIALS[Math.floor(Math.random() * WEEK_HOT_MATERIALS.length)]

  return {
    meta_id: id,
    name: `${materialName} ${fileType.name.toUpperCase()}`,
    src: `https://placehold.co/100x100/e2e8f0/475569?text=${fileType.extension.toUpperCase()}`,
    size: generateRandomSize(),
    read_people_count: generateRandomReadCount(),
    read_people_percent: generateRandomReadPercent(),
    is_favorite: generateRandomFavorite(),
    extension: fileType.extension
  }
}

/**
 * Mock: weekHotAPI
 */
export async function mockWeekHotAPI(params) {
  await mockDelay()

  const { page = 0, limit = 20 } = params
  const totalPages = 5

  if (page >= totalPages) {
    return { code: 1, msg: 'success', data: { list: [] } }
  }

  const list = []
  const startIndex = page * limit

  for (let i = 0; i < limit; i++) {
    list.push(generateWeekHotItem(startIndex + i + 1))
  }

  console.log(`[Mock] weekHotAPI - 第${page}页,共${list.length}条`)

  return { code: 1, msg: 'success', data: { list } }
}

// ============================================================================
// 2. 资料列表 Mock (fileListAPI)
// ============================================================================

const MATERIAL_NAMES = [
  '2024年保险行业发展趋势报告',
  '高净值客户开发实战手册',
  '家庭保障需求分析模板',
  '养老规划产品对比表',
  '教育金储备方案',
  '重疾险条款解读',
  '百万医疗险销售指南',
  '年金险产品培训资料',
  '终身寿险销售技巧',
  '车险理赔流程说明',
  '企业财产险基础知识',
  '责任险产品介绍',
  '意外险保障方案',
  '健康险核保手册',
  '投保实务操作指南',
  '客户异议处理话术',
  '保单托管服务流程',
  '理赔案例分析',
  '保险法律法规汇编',
  '行业合规要求解读'
]

/**
 * 生成资料列表项
 */
function generateMaterialItem(id) {
  const fileType = FILE_TYPES[Math.floor(Math.random() * FILE_TYPES.length)]
  const materialName = MATERIAL_NAMES[Math.floor(Math.random() * MATERIAL_NAMES.length)]

  return {
    id: id,
    meta_id: id,
    name: materialName,
    title: materialName,
    fileName: `${materialName}.${fileType.extension}`,
    desc: '这是一份详细的培训资料，包含丰富的案例和实战技巧...',
    size: generateRandomSize(),
    extension: fileType.extension,
    collected: generateRandomFavorite() === '1',
    src: `https://placehold.co/100x100/e2e8f0/475569?text=${fileType.extension.toUpperCase()}`,
    downloadUrl: `https://placehold.co/100x100/e2e8f0/475569?text=${fileType.extension.toUpperCase()}`,
    post_date: new Date().toISOString(),
    value: `https://placehold.co/100x100/e2e8f0/475569?text=${fileType.extension.toUpperCase()}`
  }
}

/**
 * Mock: fileListAPI
 */
export async function mockFileListAPI(params) {
  await mockDelay()

  const { page = 0, limit = 20, cid, keyword, child_id } = params
  const totalPages = 8

  if (page >= totalPages) {
    return { code: 1, msg: 'success', data: { list: [], total: totalPages * limit } }
  }

  const list = []
  const startIndex = page * limit

  for (let i = 0; i < limit; i++) {
    const item = generateMaterialItem(startIndex + i + 1)

    // 如果有关键词搜索，过滤数据
    if (keyword && !item.name.includes(keyword)) {
      continue
    }

    list.push(item)
  }

  console.log(`[Mock] fileListAPI - 第${page}页,共${list.length}条`)

  return {
    code: 1,
    msg: 'success',
    data: {
      list,
      total: totalPages * limit,
      max_level: 2,
      cate: {
        id: parseInt(cid) || 1,
        category_name: '培训资料',
        category_parent: 0,
        category_description: null
      }
    }
  }
}

// ============================================================================
// 3. 产品列表 Mock (listAPI)
// ============================================================================

const PRODUCT_NAMES = [
  '百万年金保险计划',
  '终身寿险至尊版',
  '重疾险保障计划',
  '百万医疗险',
  '意外伤害保险',
  '教育金保险计划',
  '养老理财保险',
  '高端医疗险',
  '定期寿险',
  '终身寿险',
  '企业年金保险',
  '团体意外险',
  '家庭财产保险',
  '责任保险系列',
  '旅游保险',
  '留学保险',
  '健康保险计划',
  '车辆保险',
  '财产一切险',
  '工程保险'
]

const PRODUCT_TAGS = [
  { id: 1, name: '热销', bg_color: '#FEE2E2', text_color: '#DC2626' },
  { id: 2, name: '新品', bg_color: '#DBEAFE', text_color: '#2563EB' },
  { id: 3, name: '推荐', bg_color: '#D1FAE5', text_color: '#059669' },
  { id: 4, name: '限时', bg_color: '#FEF3C7', text_color: '#D97706' }
]

const PRODUCT_CATEGORIES = [
  { id: 1, name: '人寿保险' },
  { id: 2, name: '健康保险' },
  { id: 3, name: '意外保险' },
  { id: 4, name: '财产保险' }
]

/**
 * 生成产品列表项
 */
function generateProductItem(id) {
  const productName = PRODUCT_NAMES[Math.floor(Math.random() * PRODUCT_NAMES.length)]
  const recommend = Math.random() > 0.7 ? 'hot' : ''

  // 随机选择1-2个标签
  const tags = []
  const tagCount = Math.floor(Math.random() * 2) + 1
  const availableTags = [...PRODUCT_TAGS].sort(() => Math.random() - 0.5)

  for (let i = 0; i < tagCount; i++) {
    tags.push(availableTags[i])
  }

  return {
    id: id,
    product_name: productName,
    name: productName,
    cover_image: `https://placehold.co/400x300/4caf50/ffffff?text=${encodeURIComponent(productName.substring(0, 6))}`,
    recommend: recommend,
    tags: tags,
    description: '这是一款优质的保险产品，为您的家庭提供全面保障...',
    premium: Math.floor(Math.random() * 10000 + 1000),
    category_id: Math.floor(Math.random() * 4) + 1
  }
}

/**
 * Mock: listAPI (产品列表)
 */
export async function mockProductListAPI(params) {
  await mockDelay()

  const { page = 0, limit = 10, cid, keyword } = params
  const totalPages = 10

  if (page >= totalPages) {
    return { code: 1, msg: 'success', data: { list: [], categories: [], total: 0 } }
  }

  const list = []
  const startIndex = page * limit

  for (let i = 0; i < limit; i++) {
    const item = generateProductItem(startIndex + i + 1)

    // 如果有分类过滤
    if (cid && item.category_id !== parseInt(cid)) {
      continue
    }

    // 如果有关键词搜索
    if (keyword && !item.product_name.includes(keyword)) {
      continue
    }

    list.push(item)
  }

  console.log(`[Mock] listAPI - 第${page}页,共${list.length}条`)

  return {
    code: 1,
    msg: 'success',
    data: {
      list,
      categories: PRODUCT_CATEGORIES,
      total: totalPages * limit
    }
  }
}

// ============================================================================
// 4. 搜索 Mock (searchAPI)
// ============================================================================

/**
 * Mock: searchAPI (支持产品和资料搜索)
 */
export async function mockSearchAPI(params) {
  await mockDelay()

  const { page = 0, limit = 20, keyword, type } = params

  if (!keyword) {
    // 🔧 优化：如果没有关键词，返回更多推荐数据用于测试
    // 生成20个产品和20个资料作为默认搜索结果
    const defaultProducts = []
    const defaultFiles = []

    for (let i = 0; i < 20; i++) {
      const productItem = generateProductItem(i + 1)
      defaultProducts.push({
        ...productItem,
        id: i + 1,
        cover_image: productItem.cover_image
      })

      const materialItem = generateMaterialItem(i + 1)
      defaultFiles.push({
        ...materialItem,
        id: i + 1,
        fileName: materialItem.fileName,
        fileSize: materialItem.size,
        learners: `${materialItem.read_people_count}人学习`,
        readPeoplePercent: materialItem.read_people_percent,
        collected: materialItem.collected,
        extension: materialItem.extension,
        downloadUrl: materialItem.downloadUrl,
        title: materialItem.title,
        src: materialItem.src
      })
    }

    console.log(`[Mock] searchAPI - 无关键词，返回默认数据:产品${defaultProducts.length}条,资料${defaultFiles.length}条`)
    return {
      code: 1,
      msg: 'success',
      data: {
        products: { list: defaultProducts, total: defaultProducts.length * 5 },
        files: { list: defaultFiles, total: defaultFiles.length * 5 }
      }
    }
  }

  const totalPages = 5

  if (page >= totalPages) {
    return {
      code: 1,
      msg: 'success',
      data: {
        products: { list: [], total: 0 },
        files: { list: [], total: 0 }
      }
    }
  }

  const products = []
  const files = []
  const startIndex = page * limit

  // 🔧 优化：每次循环都生成数据和尝试匹配，增加命中率
  for (let i = 0; i < limit / 2; i++) {
    // 产品
    const productItem = generateProductItem(startIndex + i + 1)
    const productName = productItem.product_name.toLowerCase()
    const searchKeyword = keyword.toLowerCase()

    // 🔧 优化：更宽松的搜索条件
    // 1. 完全匹配
    // 2. 拆分关键词，包含任意一个字符即可
    // 3. 关键词长度 >= 2 时，只要产品名称包含任意连续2个字符
    const keywords = searchKeyword.split('').filter(k => k.trim())
    const hasAnyChar = keywords.length > 0 && keywords.some(k => productName.includes(k))
    const hasBigram = searchKeyword.length >= 2 && keywords.slice(0, -1).some((k, idx) => productName.includes(k + keywords[idx + 1]))

    if (productName.includes(searchKeyword) || hasAnyChar || hasBigram) {
      products.push({
        ...productItem,
        id: startIndex + i + 1,
        cover_image: productItem.cover_image
      })
    }

    // 资料
    const materialItem = generateMaterialItem(startIndex + i + 100)
    const materialName = materialItem.name.toLowerCase()

    const hasAnyCharMaterial = keywords.length > 0 && keywords.some(k => materialName.includes(k))
    const hasBigramMaterial = searchKeyword.length >= 2 && keywords.slice(0, -1).some((k, idx) => materialName.includes(k + keywords[idx + 1]))

    if (materialName.includes(searchKeyword) || hasAnyCharMaterial || hasBigramMaterial) {
      files.push({
        ...materialItem,
        id: startIndex + i + 100,
        fileName: materialItem.fileName,
        fileSize: materialItem.size,
        learners: `${materialItem.read_people_count}人学习`,
        readPeoplePercent: materialItem.read_people_percent,
        collected: materialItem.collected,
        extension: materialItem.extension,
        downloadUrl: materialItem.downloadUrl,
        title: materialItem.title,
        src: materialItem.src
      })
    }
  }

  // 🔧 优化：如果没有匹配到任何数据，返回一些推荐数据
  if (products.length === 0 && files.length === 0) {
    console.log(`[Mock] searchAPI - 无匹配结果，返回推荐数据`)
    // 生成 5 个推荐产品
    for (let i = 0; i < 5; i++) {
      const productItem = generateProductItem(startIndex + i + 1)
      products.push({
        ...productItem,
        id: startIndex + i + 1,
        cover_image: productItem.cover_image
      })

      const materialItem = generateMaterialItem(startIndex + i + 100)
      files.push({
        ...materialItem,
        id: startIndex + i + 100,
        fileName: materialItem.fileName,
        fileSize: materialItem.size,
        learners: `${materialItem.read_people_count}人学习`,
        readPeoplePercent: materialItem.read_people_percent,
        collected: materialItem.collected,
        extension: materialItem.extension,
        downloadUrl: materialItem.downloadUrl,
        title: materialItem.title,
        src: materialItem.src
      })
    }
  }

  console.log(`[Mock] searchAPI - 第${page}页,关键词"${keyword}",产品${products.length}条,资料${files.length}条`)

  return {
    code: 1,
    msg: 'success',
    data: {
      products: { list: products, total: products.length * totalPages },
      files: { list: files, total: files.length * totalPages }
    }
  }
}

// ============================================================================
// 5. 消息列表 Mock (myListAPI)
// ============================================================================

const MESSAGE_TITLES = [
  '关于2024年新产品上线通知',
  '系统升级维护公告',
  '您的保单已生效提醒',
  '理赔进度更新通知',
  '续费提醒',
  '活动邀请：财富管理讲座',
  '客户服务满意度调查',
  '最新培训资料已上线',
  '合规要求更新通知',
  '节日问候与祝福',
  '产品停售通知',
  '核保政策调整',
  '理赔流程优化说明',
  '客户权益保障计划',
  '数字化服务升级公告'
]

/**
 * 生成消息列表项
 */
function generateMessageItem(id) {
  const title = MESSAGE_TITLES[Math.floor(Math.random() * MESSAGE_TITLES.length)]
  const now = new Date()
  const createDate = new Date(now.getTime() - Math.random() * 30 * 24 * 60 * 60 * 1000)

  return {
    id: id,
    title: title,
    intro: `这是一条关于"${title}"的重要通知，请及时查看详情...`,
    content: `这是一条关于"${title}"的重要通知，请及时查看详情。如需了解更多信息，请联系客服。`,
    create_time: formatDate(createDate),
    is_read: Math.random() > 0.5 ? 1 : 0,
    type: Math.random() > 0.5 ? 'notice' : 'system'
  }
}

/**
 * 格式化日期
 */
function formatDate(date) {
  const year = date.getFullYear()
  const month = String(date.getMonth() + 1).padStart(2, '0')
  const day = String(date.getDate()).padStart(2, '0')
  return `${year}-${month}-${day}`
}

/**
 * Mock: myListAPI (消息列表)
 */
export async function mockMessageListAPI(params) {
  await mockDelay()

  const { page = 1, limit = 10 } = params
  const totalPages = 8

  if (page > totalPages) {
    return { code: 1, msg: 'success', data: { list: [] } }
  }

  const list = []
  const startIndex = (page - 1) * limit

  for (let i = 0; i < limit; i++) {
    list.push(generateMessageItem(startIndex + i + 1))
  }

  console.log(`[Mock] myListAPI - 第${page}页,共${list.length}条`)

  return {
    code: 1,
    msg: 'success',
    data: { list }
  }
}

// ============================================================================
// 导出统一 Mock API 调用器
// ============================================================================

/**
 * Mock API 调用器
 * @param {string} apiName - API 名称
 * @param {Object} params - 请求参数
 * @returns {Promise}
 */
export async function mockAPI(apiName, params) {
  switch (apiName) {
    case 'weekHotAPI':
      return await mockWeekHotAPI(params)
    case 'fileListAPI':
      return await mockFileListAPI(params)
    case 'listAPI':
      return await mockProductListAPI(params)
    case 'searchAPI':
      return await mockSearchAPI(params)
    case 'myListAPI':
      return await mockMessageListAPI(params)
    default:
      console.warn(`[Mock] 未知的 API: ${apiName}`)
      return { code: 0, msg: 'Unknown API', data: null }
  }
}