//
//  KMNTools.swift
//  PDF Reader Pro
//
//  Created by 丁林圭 on 2024/10/24.
//

import Cocoa

class KMNTools: NSObject {

    @objc class func parseIndexSet(indexSet: IndexSet) -> String {
        return self.parseIndexs(indexs: indexSet.sorted())
    }
    
    @objc class func parseIndexs(indexs: [Int]) -> String {
        if (indexs.isEmpty) {
            return ""
        }
        if (indexs.count == 1) {
            return "\(indexs.first!+1)"
        }
        
        var sortArray: [Int] = []
        for i in indexs {
            sortArray.append(i)
        }
        /// 排序 (升序)
        sortArray.sort(){$0 < $1}
        
        var a: Int = 0
        var b: Int = 0
        var result: String?
        for i in sortArray {
            if (result == nil) {
                a = i
                b = i
                result = ""
                continue
            }
            if (i == b+1) {
                b = i
                if (i == sortArray.last) {
                    result?.append(String(format: "%d-%d", a+1,b+1))
                }
            } else {
                if (a == b) {
                    result?.append(String(format: "%d,", a+1))
                } else {
                    result?.append(String(format: "%d-%d,", a+1,b+1))
                }
                a = i
                b = i
                if (i == sortArray.last) {
                    result?.append(String(format: "%d", a+1))
                }
            }
        }
        return result ?? ""
    }
}