import { columnsToSQL } from './column'

import { exprToSQL } from './expr'

import { arrayStructTypeToSQL, hasVal, toUpper } from './util'

function arrayExprListToSQL(expr) {

const {

array_path: arrayPath,

brackets,

expr_list: exprList,

parentheses,

} = expr

if (!exprList) return `[${columnsToSQL(arrayPath)}]`

const result = Array.isArray(exprList) ? exprList.map(col => `(${columnsToSQL(col)})`).filter(hasVal).join(', ') : exprToSQL(exprList)

if (brackets) return `[${result}]`

return parentheses ? `(${result})` : result

}

function arrayStructValueToSQL(expr) {

const {

expr_list: exprList,

type,

} = expr

switch (toUpper(type)) {

case 'STRUCT':

return `(${columnsToSQL(exprList)})`

case 'ARRAY':

return arrayExprListToSQL(expr)

default:

return ''

}

}

function arrayStructExprToSQL(expr) {

const { definition, keyword } = expr

const result = [toUpper(keyword)]

if (definition && typeof definition === 'object') {

result.length = 0

result.push(arrayStructTypeToSQL(definition))

}

result.push(arrayStructValueToSQL(expr))

return result.filter(hasVal).join('')

}

export {

arrayStructExprToSQL,

arrayStructValueToSQL,

}