//
//  DateFormatterExtension.swift
//  Nextcloud Cookbook iOS Client
//
//  Created by Vincent Meilinger on 14.09.23.
//

import Foundation

extension Formatter {
    static let positional: DateComponentsFormatter = {
        let formatter = DateComponentsFormatter()
        formatter.unitsStyle = .positional
        return formatter
    }()
    
    static func formatDate(duration: String) -> String {
        var duration = duration
        if duration.hasPrefix("PT") { duration.removeFirst(2) }
        var hour: Int = 0, minute: Int = 0
        if let index = duration.firstIndex(of: "H") {
            hour = Int(duration[..<index]) ?? 0
            duration.removeSubrange(...index)
        }
        if let index = duration.firstIndex(of: "M") {
            minute = Int(duration[..<index]) ?? 0
            duration.removeSubrange(...index)
        }
        
        if hour == 0 && minute != 0 {
            return "\(minute)min"
        }
        if hour != 0 && minute == 0 {
            return "\(hour)h"
        }
        if hour != 0 && minute != 0 {
            return "\(hour)h \(minute)"
        }
        return "--"
    }

    static func stringToComponents(duration: String) -> (Int, Int) {
        var duration = duration
        if duration.hasPrefix("PT") { duration.removeFirst(2) }
        var hour: Int = 0, minute: Int = 0
        if let index = duration.firstIndex(of: "H") {
            hour = Int(duration[..<index]) ?? 0
            duration.removeSubrange(...index)
        }
        if let index = duration.firstIndex(of: "M") {
            minute = Int(duration[..<index]) ?? 0
            duration.removeSubrange(...index)
        }
        
        return (hour, minute)
    }
}