export type SplitOperatorType = 'symbol' | 'regex';

function leftUnwrap(
    row: string,
    left: string = '',
    multiLevel: boolean
): string {
    if (left === '') return row; // Prevent infinite loop if left is an empty string
    while (row.startsWith(left)) {
        row = row.slice(left.length);
        if (!multiLevel) {
            break;
        }
    }
    return row;
}

function rightUnwrap(
    row: string,
    right: string = '',
    multiLevel: boolean
): string {
    if (right === '') return row; // Prevent infinite loop if right is an empty string
    while (row.endsWith(right)) {
        row = row.slice(0, row.length - right.length);
        if (!multiLevel) {
            break;
        }
    }
    return row;
}

export function unwrapList(
    splitOperatorType: SplitOperatorType,
    input: string,
    splitSeparator: string,
    joinSeparator: string,
    deleteEmptyItems: boolean,
    multiLevel: boolean,
    trimItems: boolean,
    left: string = '',
    right: string = ''
): string {
    let array: string[];
    let unwrappedArray: string[] = [];
    switch (splitOperatorType) {
        case 'symbol':
            array = input.split(splitSeparator);
            break;
        case 'regex':
            array = input.split(new RegExp(splitSeparator));
            break;
    }
    if (deleteEmptyItems) {
        array = array.filter(Boolean);
    }

    // for each element of array unwrap left side then right side and push the result to a final array
    for (let row of array) {
        row = leftUnwrap(row, left, multiLevel);
        row = rightUnwrap(row, right, multiLevel);
        unwrappedArray.push(row);
    }
    // trim items if needed
    if (trimItems) {
        unwrappedArray = unwrappedArray.map(item => item.trim());
    }
    return unwrappedArray.join(joinSeparator);
}