/**
 * 国家地址配置
 * 定义各国地址字段规则和邮编格式
 */

// 货币代码到国家代码的映射
export const currencyToCountry = {
  'USD': 'US',
  'SGD': 'SG',
  'MYR': 'MY',
  'PHP': 'PH',
  'THB': 'TH',
  'VND': 'VN',
  'CNY': 'CN',
  'GBP': 'GB',
  'EUR': 'DE'
}

// 国家配置
export const countryConfigs = {
  SG: {
    code: 'SG',
    name: '新加坡',
    nameEn: 'Singapore',
    phoneCode: '+65',
    postcodeLength: 6,
    postcodePattern: /^\d{6}$/,
    requiredFields: ['shippingName', 'shippingPhone', 'shippingCountry', 'shippingCity', 
                     'shippingAddressLine1', 'shippingBlockNumber', 'shippingUnitNumber', 'shippingPostcode'],
    specialFields: ['shippingBlockNumber', 'shippingUnitNumber'],
    fieldLabels: {
      shippingBlockNumber: '组屋号 (Block Number)',
      shippingUnitNumber: '单元号 (Unit Number)',
      shippingAddressLine1: '详细地址1 (Address Line 1)',
      shippingAddressLine2: '详细地址2 (Address Line 2)',
      shippingCity: '城市 (City)',
      shippingPostcode: '邮编 (Postcode)'
    },
    addressFormat: 'Blk 123 Jurong West St 41 #12-345, Singapore 640123'
  },
  MY: {
    code: 'MY',
    name: '马来西亚',
    nameEn: 'Malaysia',
    phoneCode: '+60',
    postcodeLength: 5,
    postcodePattern: /^\d{5}$/,
    requiredFields: ['shippingName', 'shippingPhone', 'shippingCountry', 'shippingCity', 
                     'shippingStateMalaysia', 'shippingAddressLine1', 'shippingPostcode'],
    specialFields: ['shippingStateMalaysia'],
    fieldLabels: {
      shippingStateMalaysia: '州属 (State)',
      shippingAddressLine1: '详细地址1 (Address Line 1)',
      shippingAddressLine2: '详细地址2 (Address Line 2)',
      shippingCity: '城市 (City)',
      shippingPostcode: '邮编 (Postcode)'
    },
    addressFormat: '123 Jalan Abdullah, 05-01 Menara A, Kuala Lumpur, Selangor 50300'
  },
  PH: {
    code: 'PH',
    name: '菲律宾',
    nameEn: 'Philippines',
    phoneCode: '+63',
    postcodeLength: 4,
    postcodePattern: /^\d{4}$/,
    requiredFields: ['shippingName', 'shippingPhone', 'shippingCountry', 'shippingCity', 
                     'shippingState', 'shippingBarangay', 'shippingAddressLine1', 'shippingPostcode'],
    specialFields: ['shippingBarangay'],
    fieldLabels: {
      shippingBarangay: 'Barangay（社区编号）',
      shippingState: '省 (Province)',
      shippingCity: '市 (City)',
      shippingAddressLine1: '详细地址1 (Address Line 1)',
      shippingAddressLine2: '详细地址2 (Address Line 2)',
      shippingPostcode: '邮编 (Postcode)'
    },
    addressFormat: '123 Main St, Barangay 12, Manila, Metro Manila 1000'
  },
  TH: {
    code: 'TH',
    name: '泰国',
    nameEn: 'Thailand',
    phoneCode: '+66',
    postcodeLength: 5,
    postcodePattern: /^\d{5}$/,
    requiredFields: ['shippingName', 'shippingPhone', 'shippingCountry', 'shippingCity', 
                     'shippingState', 'shippingAddressLine1', 'shippingPostcode', 'shippingAddressThai'],
    specialFields: ['shippingAddressThai', 'shippingAdministrativeArea'],
    fieldLabels: {
      shippingAddressThai: '泰文地址 (Thai Address)',
      shippingAddressLine1: '英文地址 (English Address)',
      shippingAddressLine2: '详细地址2 (Address Line 2)',
      shippingState: '府 (Changwat)',
      shippingCity: '县 (Amphoe)',
      shippingAdministrativeArea: '区 (Tambon)',
      shippingPostcode: '邮编 (Postcode)'
    },
    addressFormat: '123 Soi Sukhumvit 101, Khlong Toei, Bangkok 10110'
  },
  VN: {
    code: 'VN',
    name: '越南',
    nameEn: 'Vietnam',
    phoneCode: '+84',
    postcodeLength: 5,
    postcodePattern: /^\d{5}$/,
    requiredFields: ['shippingName', 'shippingPhone', 'shippingCountry', 'shippingProvince', 
                     'shippingDistrict', 'shippingWard', 'shippingAddressLine1', 'shippingPostcode'],
    specialFields: ['shippingProvince', 'shippingDistrict', 'shippingWard'],
    fieldLabels: {
      shippingProvince: '省 (Tỉnh)',
      shippingDistrict: '市/郡 (Thành phố/Huyện)',
      shippingWard: '区/坊 (Quận/Phường)',
      shippingAddressLine1: '详细地址1 (Địa chỉ chi tiết 1)',
      shippingAddressLine2: '详细地址2 (Địa chỉ chi tiết 2)',
      shippingPostcode: '邮编 (Postcode)'
    },
    addressFormat: '123 Đường Nguyễn Huệ, Phường Bến Nghé, Quận 1, Thành phố Hồ Chí Minh 70000'
  }
}

/**
 * 根据国家代码获取配置
 */
export function getCountryConfig(countryCode) {
  return countryConfigs[countryCode] || null
}

/**
 * 根据货币代码推断国家
 */
export function getCountryByCurrency(currency) {
  return currencyToCountry[currency] || null
}

/**
 * 验证邮编格式
 */
export function validatePostcode(countryCode, postcode) {
  if (!postcode || !postcode.trim()) {
    return false
  }
  const config = getCountryConfig(countryCode)
  if (!config) {
    return true // 未知国家不验证
  }
  return config.postcodePattern.test(postcode.trim())
}

/**
 * 获取必填字段
 */
export function getRequiredFields(countryCode) {
  const config = getCountryConfig(countryCode)
  return config ? config.requiredFields : []
}

/**
 * 获取特殊字段
 */
export function getSpecialFields(countryCode) {
  const config = getCountryConfig(countryCode)
  return config ? config.specialFields : []
}