//
//  TournamentRankView.swift
//  PadelClub
//
//  Created by Razmig Sarkissian on 30/04/2024.
//

import SwiftUI
import LeStorage

struct TournamentRankView: View {
    @Environment(Tournament.self) var tournament: Tournament
    @EnvironmentObject var dataStore: DataStore
    
    @State private var rankings: [Int: [TeamRegistration]] = [:]
    
    var body: some View {
        List {
            
            Section {
                let matchs = tournament.runningMatches(tournament.allMatches())
                let rankingPublished = tournament.selectedSortedTeams().allSatisfy({ $0.finalRanking != nil })
                LabeledContent {
                    Text(matchs.count.formatted())
                } label: {
                    Text("Matchs en cours")
                }

                LabeledContent {
                    if rankingPublished {
                        Image(systemName: "checkmark")
                    } else {
                        Image(systemName: "xmark")
                    }
                } label: {
                    Text("Classement publié")
                }

                RowButtonView(rankingPublished ? "Re-publier le classement" : "Publier le classement", role: .destructive) {
                    rankings.keys.sorted().forEach { rank in
                        if let rankedTeams = rankings[rank] {
                            rankedTeams.forEach { team in
                                team.finalRanking = rank
                                team.pointsEarned = tournament.tournamentLevel.points(for: rank - 1, count: tournament.teamCount)
                            }
                        }
                    }
                    _save()
                }
            } footer: {
                FooterButtonView("masquer le classement", role: .destructive) {
                    tournament.unsortedTeams().forEach { team in
                        team.finalRanking = nil
                        team.pointsEarned = nil
                    }
                    _save()
                }
            }
            
            let keys = rankings.keys.sorted()
            ForEach(keys, id: \.self) { key in
                if let rankedTeams = rankings[key] {
                    ForEach(rankedTeams) { team in
                        HStack {
                            VStack(alignment: .trailing) {
                                VStack(alignment: .trailing, spacing: -8.0) {
                                    ZStack(alignment: .trailing) {
                                        Text(tournament.teamCount.formatted()).hidden()
                                        Text(key.formatted())
                                    }
                                    .monospacedDigit()
                                    .font(.largeTitle)
                                    .fontWeight(.bold)
                                    Text(key.ordinalFormattedSuffix()).font(.caption)
                                }
                                if let index = tournament.indexOf(team: team) {
                                    let rankingDifference = index - (key - 1)
                                    if rankingDifference > 0 {
                                        HStack(spacing: 0.0) {
                                            Text(rankingDifference.formatted(.number.sign(strategy: .always())))
                                                .monospacedDigit()
                                            Image(systemName: "arrowtriangle.up.fill")
                                                .imageScale(.small)
                                        }
                                        .foregroundColor(.green)
                                    } else if rankingDifference < 0 {
                                        HStack(spacing: 0.0) {
                                            Text(rankingDifference.formatted(.number.sign(strategy: .always())))
                                                .monospacedDigit()
                                            Image(systemName: "arrowtriangle.down.fill")
                                                .imageScale(.small)
                                        }
                                        .foregroundColor(.red)
                                    } else {
                                        Text("--")
                                    }
                                }
                            }
                            
                            
                            Divider()
                            
                            VStack(alignment: .leading) {
                                ForEach(team.players()) { player in
                                    VStack(alignment: .leading, spacing: -4.0) {
                                        Text(player.playerLabel()).bold()
                                        HStack(alignment: .firstTextBaseline, spacing: 0.0) {
                                            Text(player.rankLabel())
                                            if let rank = player.getRank() {
                                                Text(rank.ordinalFormattedSuffix())
                                                    .font(.caption)
                                            }
                                        }
                                    }
                                }
                            }
                            
                            Spacer()
                            VStack(alignment: .trailing) {
                                HStack(alignment: .lastTextBaseline, spacing: 0.0) {
                                    Text(tournament.tournamentLevel.points(for: key - 1, count: tournament.teamCount).formatted(.number.sign(strategy: .always())))
                                    Text("pts").font(.caption)
                                }
                            }
                        }
                    }
                }
            }
        }
        .onAppear {
            let finalRanks = tournament.finalRanking()
            finalRanks.keys.sorted().forEach { rank in
                if let rankedTeamIds = finalRanks[rank] {
                    rankings[rank] = rankedTeamIds.compactMap { Store.main.findById($0) }
                }
            }
        }
        .navigationTitle("Classement")
        .navigationBarTitleDisplayMode(.inline)
        .toolbarBackground(.visible, for: .navigationBar)
    }
    
    private func _save() {
        do {
            try dataStore.teamRegistrations.addOrUpdate(contentOfs: tournament.unsortedTeams())
        } catch {
            Logger.error(error)
        }
    }
}

#Preview {
    TournamentRankView()
}