// 模块数据驱动列表的「查询条件」工具：构建查询 SQL 片段、解析查询输入/默认值。
// 供 fms-module-list / fms-module-edit 等按模块元数据渲染的组件共用；
// 展示格式化（parseOptions / formatDateValue）见 fieldUtils.js。

export const identifierRe = /^[A-Za-z_][A-Za-z0-9_]*$/

export function escapeSqlText(value) {
  return String(value).replaceAll("'", "''")
}

export function requireModuleId(value) {
  const id = String(value ?? '')
  if (!/^\d+$/.test(id)) throw new Error('模块 ID 格式不正确')
  return id
}

export function isEmptyValue(value) {
  return value === undefined || value === null || value === ''
}

export function isRangeQuery(item) {
  return (
    item.config.b_operator === 'between' ||
    item.config.b_component === 'number-range' ||
    item.field.b_type === 'datetime'
  )
}

export function isNumericField(item) {
  return item.field.b_type === 'number' || item.field.b_type === 'money'
}

export function isDateQuery(item) {
  return (
    item.config.b_component === 'date-picker' ||
    item.field.b_type === 'date' ||
    item.field.b_type === 'datetime'
  )
}

export function emptyQueryValue(item) {
  if (item.field.b_type === 'checkbox') return ''
  if (isRangeQuery(item) || item.config.b_operator === 'in') return []
  return undefined
}

export function defaultQueryValue(item) {
  const value = item.config.b_default_value
  if (value === null || value === undefined || value === '') return emptyQueryValue(item)
  if (isRangeQuery(item) || item.config.b_operator === 'in') {
    try {
      const parsed = JSON.parse(value)
      if (Array.isArray(parsed)) return parsed
    } catch {
      // 非 JSON 默认值继续按逗号分隔处理。
    }
    return String(value)
      .split(',')
      .map((part) => part.trim())
      .filter(Boolean)
  }
  if (isNumericField(item)) {
    const number = Number(value)
    return Number.isFinite(number) ? number : undefined
  }
  return value
}

export function sqlLiteral(value, field, endOfRange = false) {
  if (isEmptyValue(value)) return null

  if (field.b_type === 'number' || field.b_type === 'money') {
    const number = Number(value)
    return Number.isFinite(number) ? String(number) : null
  }

  if (field.b_type === 'checkbox') {
    return value === true || Number(value) === 1 ? '1' : '0'
  }

  let normalized = String(value)
  const isDate = field.b_type === 'date' || field.b_type === 'datetime'
  if (isDate && value && typeof value.format === 'function') {
    normalized = value.format('YYYY-MM-DD')
  } else if (isDate) {
    normalized = String(value).slice(0, 10)
  }

  if (field.b_type === 'datetime') {
    normalized += endOfRange ? ' 23:59:59' : ' 00:00:00'
  }

  return `N'${escapeSqlText(normalized)}'`
}

export function buildQueryCondition(item, value) {
  const fieldName = item.field.b_field
  if (!identifierRe.test(fieldName)) return ''

  const field = `[${fieldName}]`
  if (isRangeQuery(item)) {
    const values = Array.isArray(value) ? value : []
    const start = sqlLiteral(values[0], item.field)
    const end = sqlLiteral(values[1], item.field, true)
    if (start && end) return `${field} BETWEEN ${start} AND ${end}`
    if (start) return `${field} >= ${start}`
    if (end) return `${field} <= ${end}`
    return ''
  }

  if (item.config.b_operator === 'in') {
    let values = value
    if (!Array.isArray(values)) {
      values = String(value ?? '')
        .split(',')
        .map((part) => part.trim())
        .filter(Boolean)
    }
    const literals = []
    for (const entry of values) {
      const literal = sqlLiteral(entry, item.field)
      if (literal) literals.push(literal)
    }
    return literals.length ? `${field} IN (${literals.join(', ')})` : ''
  }

  const literal = sqlLiteral(value, item.field)
  if (!literal) return ''
  if (item.config.b_operator === 'like') {
    return `${field} LIKE N'%${escapeSqlText(String(value))}%'`
  }
  return `${field} = ${literal}`
}