/**
 * Extracts rows from a string of values in a SQL INSERT INTO statement, where each row is a comma-separated list of values enclosed in parentheses, possibly with the last row incomplete.
 * @param {string} input
 * @returns {{rows: string[][], unCompleted:string}}
 * @example extractRowsFromSQLValues("(1,'-)',0),(2,'Demographics_of_American_Samoa',0)") // { rows: [["1","'-)'","0"],["2","'Demographics_of_American_Samoa'","0"]], unCompleted: "" }
 */
export const extractRowsFromSQLValues = (input) => {
  const rows = []
  let index = 0
  let unCompleted = ""

  while (index < input.length) {
    if (input[index] === "(") {
      const row = []
      index++ // Skip the opening '('
      let value = ""
      let insideQuotes = false
      let rowComplete = false

      while (index < input.length && !rowComplete) {
        if (input[index] === "'") {
          // An escaped quote is preceded by an odd number of backslashes.
          let backslashCount = 0
          let backIndex = index - 1
          while (backIndex >= 0 && input[backIndex] === "\\") {
            backslashCount++
            backIndex--
          }
          if (backslashCount % 2 === 0) {
            insideQuotes = !insideQuotes
          }
        }

        if (input[index] === "," && !insideQuotes) {
          row.push(value)
          value = ""
        } else if (input[index] === ")" && !insideQuotes) {
          row.push(value)
          rows.push(row)
          rowComplete = true
        } else {
          value += input[index]
        }
        index++
      }

      if (!rowComplete) {
        // If row is not completed, save it to unCompleted
        unCompleted = "("
        if (row.length > 0) {
          unCompleted += row.join(",") + "," + value
        } else if (value.length > 0) {
          unCompleted += value
        }
        break
      }
    } else {
      index++
    }
  }

  return { rows, unCompleted }
}