import { EmptyResponse, FieldType } from './enums.js'

import type { Checkboxes, FormattedField } from './types.js'

/**

* Checks if a response is empty (it is either empty or contains one of the

* "empty" strings used in issue form responses).

*

* @param value Value to Check

*/

export function isEmptyResponse(value: string): boolean {

return (

value.toLowerCase() === EmptyResponse.NONE.toLowerCase() ||

value.toLowerCase() === EmptyResponse.NO_RESPONSE.toLowerCase() ||

value === ''

)

}

/**

* Formats an input name to a slugified string.

*

* @param name Name to Format

*/

export function formatKey(name: string): string {

return name

.trim()

.toLowerCase()

.replace(/[^a-z0-9]/g, '_')

.replace(/^_+|_+$/g, '')

.replace(/_+/g, '_')

}

/**

* Formats an input value to an appropriate type

*/

export function formatValue(

input: string,

field?: FormattedField

): Checkboxes | string[] | string | undefined {

// Regex to check if a checkbox is checked.

const checkedExp: RegExp = /^-\s\[x\]\s/im

// Remove any whitespace, carriage returns, and leading/trailing newlines.

const value = input

.trim()

.replace(/\r/g, '')

.replace(/^[\n]+|[\n]+$/g, '')

if (field === undefined) return value

// Parse input field types.

switch (field.type) {

case FieldType.INPUT:

case FieldType.TEXTAREA:

// Return empty string if no response was provided. Otherwise, return the

// formatted response.

return isEmptyResponse(value) ? undefined : value

case FieldType.DROPDOWN:

// Return empty list if no response was provided. Otherwise, split by

// commas and return the list.

return isEmptyResponse(value) ? [] : value.split(/, */)

case FieldType.CHECKBOXES: {

// Return empty object if no response was provided. Otherwise, verify

// which checkboxes are checked and return the object.

const checkboxes: Checkboxes = {

selected: [],

unselected: []

}

// Return empty object if no response was provided

if (isEmptyResponse(value)) return checkboxes

// Split response by newlines.

for (let line of value.split('\n')) {

line = line.trim()

// Add checked items to selected.

if (checkedExp.test(line))

checkboxes.selected.push(line.replace(/-\s\[x\]\s/i, ''))

// Add unchecked items to unselected.

else checkboxes.unselected.push(line.replace(/-\s\[\s\]\s/i, ''))

}

return checkboxes

}

default:

throw new Error(`Unknown field type: ${field.type}`)

}

}