RankingsView.view

//
//  RankingsView.swift
//  ChessClub
//
//  Created by Oliver Drobnik on 22.04.22.
//

import SwiftUI

struct RankingsView: View
{
	@Environment(\.managedObjectContext) private var viewContext
	
//	@SectionedFetchRequest<Bool, Member>(
//		sectionIdentifier: \.rating,
//
//		sortDescriptors: []
//	)
//	private var members: SectionedFetchResults<Bool, Member>
	
	@FetchRequest(sortDescriptors: [NSSortDescriptor(keyPath: \Member.rating, ascending: false)], predicate: NSPredicate(format: "rating > 0"), animation: .default)
	var members: FetchedResults<Member>
	
	func membersWithBiggerRanking(than member: Member) -> [Member]
	{
		return members.filter { otherMember in
			guard otherMember.isRankedAsAdult == member.isRankedAsAdult else
			{
				return false
			}
			
			return otherMember.rating > member.rating
		}
	}
	
    var body: some View
	{
			List
			{
				Section("Adult")
				{
					
					ForEach(members) { member in
						
						let higherRanked = self.membersWithBiggerRanking(than: member)
						
						if member.isRankedAsAdult
						{
							HStack {
								ZStack(alignment: .trailing) {
									Text("\(higherRanked.count + 1)")
									Text("00").hidden()
								}.font(.caption.monospacedDigit())

								Text(member.displayName).lineLimit(1)
								Spacer()
								
								if let string = member.ratingString
								{
									Text(string)
										.font(.caption.monospacedDigit())
								}
							}

						}
					}
				}
				
				Section("Youth")
				{
					ForEach(members) { member in
						
						let higherRanked = self.membersWithBiggerRanking(than: member)
						
						if !member.isRankedAsAdult
						{
							HStack {
								ZStack(alignment: .trailing) {
									Text("\(higherRanked.count + 1)")
									Text("00").hidden()
								}.font(.caption.monospacedDigit())
								
								Text(member.displayName).lineLimit(1)
								Spacer()
								
								if let string = member.ratingString
								{
									Text(string)
										.font(.caption.monospacedDigit())
								}
							}
						}
					}

				}
			}
    }
}