croppedText += `\n\n**Important disclaimer**, this text is incomplete! ${croppedTokens} or ${
 (croppedTokens / totalTokens).toFixed(2) * 100
}% of tokens have been removed from this location in the text due to lack limited model context of ${maxLength}\n\n`

const splits = text.split(/[,,。??!!;;\n]/).map((s) => s.trim())
const splitsLength = splits.map((s) => (tiktoken ? encode(s).length : s.length))
const cropTargetLength = maxLength - startLength - endLength
let firstHalfTokens = 0
let secondHalfTokens = 0
const halfTargetTokens = Math.floor(cropTargetLength / 2)
let middleIndex = -1
let endStartIndex = splits.length
let totalTokens = splitsLength.reduce((sum, length) => sum + length + 1, 0)
let croppedTokens = 0
let croppedText = ''
let currentLength = 0
// First pass: find the middle
for (let i = 0; i < splits.length; i++) {
 if (firstHalfTokens < halfTargetTokens) {
 firstHalfTokens += splitsLength[i] + 1
 } else {
 middleIndex = i
 break
 }
}
// Second pass: find the start of the end section
for (let i = splits.length - 1; i >= middleIndex; i--) {
 secondHalfTokens += splitsLength[i] + 1
 if (secondHalfTokens >= halfTargetTokens) {
 endStartIndex = i
 break
 }
}
// Calculate cropped tokens
croppedTokens = totalTokens - firstHalfTokens - secondHalfTokens
// Construct the cropped text
croppedText = splits.slice(0, middleIndex).join('\n')
if (croppedTokens > 0) {
 croppedText += `\n\n**Important disclaimer**, this text is incomplete! ${croppedTokens} or ${
 (croppedTokens / totalTokens).toFixed(2) * 100
 }% of tokens have been removed from this location in the text due to lack limited model context of ${maxLength}\n\n`
}
croppedText += splits.slice(endStartIndex).join('\n')