//
//  FollowUpMatchView.swift
//  PadelClub
//
//  Created by razmig on 11/10/2024.
//

import SwiftUI

struct FollowUpMatchView: View {
    @EnvironmentObject var dataStore: DataStore
    @Environment(\.dismiss) private var dismiss
    let match: Match?
    let readyMatches: [Match]
    let matchesLeft: [Match]
    let isFree: Bool
    var autoDismiss: Bool = false
    
    @State private var sortingMode: SortingMode? = .index
    @State private var selectedCourt: Int?
    @State private var checkCanPlay: Bool = false
    @State private var seeAll: Bool = true
    @Binding var dismissWhenPresentFollowUpMatchIsDismissed: Bool
    
    var matches: [Match] {
        seeAll ? matchesLeft : readyMatches
    }
    
    enum SortingMode: Int, Identifiable, CaseIterable, Selectable, Equatable {
        func selectionLabel(index: Int) -> String {
            localizedSortingModeLabel()
        }
        
        func badgeValue() -> Int? {
            nil
        }
        
        func badgeImage() -> Badge? {
            nil
        }
        
        func badgeValueColor() -> Color? {
            nil
        }
        
        static func == (lhs: SortingMode, rhs: SortingMode) -> Bool {
            return lhs.id == rhs.id
        }

        var id: Int { self.rawValue }
        case winner
        case loser
        case index
        case restingTime
        case court
        
        func canHaveSeeAllOption() -> Bool {
            switch self {
            case .index, .restingTime:
                return true
            case .winner, .loser, .court:
                return false
            }
        }
        
        func localizedSortingModeLabel() -> String {
            switch self {
            case .index:
                return "Ordre prévu"
            case .court:
                return "Terrain"
            case .restingTime:
                return "Temps de repos"
            case .winner:
                return "Gagnant"
            case .loser:
                return "Perdant"
            }
        }
    }
    
    init(match: Match, dismissWhenPresentFollowUpMatchIsDismissed: Binding<Bool>) {
        _dismissWhenPresentFollowUpMatchIsDismissed = dismissWhenPresentFollowUpMatchIsDismissed
        self.match = match
        _selectedCourt = .init(wrappedValue: match.courtIndex)
        let currentTournament = match.currentTournament()
        let allMatches = currentTournament?.allMatches() ?? []
        self.matchesLeft = Tournament.matchesLeft(allMatches)
        let runningMatches = Tournament.runningMatches(allMatches)
        let readyMatches = Tournament.readyMatches(allMatches)
        self.readyMatches = Tournament.availableToStart(readyMatches, in: runningMatches, checkCanPlay: false)
        self.isFree = currentTournament?.isFree() ?? true
    }
    
    init(selectedCourt: Int?, allMatches: [Match], autoDismiss: Bool = true) {
        _dismissWhenPresentFollowUpMatchIsDismissed = .constant(false)
        _selectedCourt = .init(wrappedValue: selectedCourt)
        self.match = nil
        self.autoDismiss = autoDismiss
        self.matchesLeft = Tournament.matchesLeft(allMatches)
        let runningMatches = Tournament.runningMatches(allMatches)
        let readyMatches = Tournament.readyMatches(allMatches)
        self.readyMatches = Tournament.availableToStart(readyMatches, in: runningMatches, checkCanPlay: false)
        self.isFree = false
    }


    var winningTeam: TeamRegistration? {
        match?.winner()
    }
    
    var losingTeam: TeamRegistration? {
        match?.loser()
    }
    
    var sortingModeCases: [SortingMode] {
        var sortingModes = [SortingMode]()
        if winningTeam != nil {
            sortingModes.append(.winner)
        }
        if losingTeam != nil {
            sortingModes.append(.loser)
        }
        sortingModes.append(.index)
        sortingModes.append(.restingTime)
//        sortingModes.append(.court)
        return sortingModes
    }
    
    func contentUnavailableDescriptionLabel() -> String {
        switch sortingMode! {
        case .winner:
            if let winningTeam {
                return "Aucun match à suivre pour \(winningTeam.teamLabel())"
            } else {
                return "La paire gagnante n'a pas été décidé"
            }
        case .loser:
            if let losingTeam {
                return "Aucun match à suivre pour \(losingTeam.teamLabel())"
            } else {
                return "La paire perdante n'a pas été décidé"
            }
        case .index:
            return "Ce tournoi n'a aucun match prêt à démarrer"
        case .restingTime:
            return "Ce tournoi n'a aucun match prêt à démarrer"
        case .court:
            return "Ce tournoi n'a aucun match prêt à démarrer"
        }
    }

    var sortedMatches: [Match] {
        switch sortingMode! {
        case .index:
            return matches
        case .restingTime:
            return matches.sorted(by: \.restingTimeForSorting)
        case .court:
            return matchesLeft.filter({ $0.courtIndex == selectedCourt })
        case .winner:
            if let winningTeam, let followUpMatch = matchesLeft.first(where: { $0.containsTeamId(winningTeam.id) }) {
                return [followUpMatch]
            } else {
                return []
            }
        case .loser:
            if let losingTeam, let followUpMatch = matchesLeft.first(where: { $0.containsTeamId(losingTeam.id) }) {
                return [followUpMatch]
            } else {
                return []
            }
        }
    }
    
    var body: some View {
        NavigationStack {
            VStack(spacing: 0) {
                GenericDestinationPickerView(selectedDestination: $sortingMode, destinations: sortingModeCases, nilDestinationIsValid: false)
                
                List {
                    //
                    //                    Toggle(isOn: $checkCanPlay) {
                    //                        if isFree {
                    //                            Text("Vérifier le paiement ou la présence")
                    //                        } else {
                    //                            Text("Vérifier la présence")
                    //                        }
                    //                    }
                    //                } footer: {
                    //                    if isFree {
                    //                        Text("Masque les matchs où un ou plusieurs joueurs qui ne sont pas encore arrivé")
                    //                    } else {
                    //                        Text("Masque les matchs où un ou plusieurs joueurs n'ont pas encore réglé ou qui ne sont pas encore arrivé")
                    //                    }
                    
                    if sortedMatches.isEmpty == false {
                        ForEach(sortedMatches) { match in
                            let tournament = match.currentTournament()
                            Section {
                                MatchRowView(match: match, updatedField: selectedCourt)
                                    .matchViewStyle(.followUpStyle)
                            } header: {
                                if let tournament {
                                    HStack {
                                        Text(tournament.tournamentTitle(.short))
                                        Spacer()
                                        if let club = tournament.club() {
                                            Text("@" + club.clubTitle(.short))
                                        }
                                    }
                                }
                            } footer: {
                                HStack {
                                    if let tournament {
                                        Text(tournament.eventLabel())
                                    }
            #if DEBUG
                                    Spacer()
                                    if let roundObject = match.roundObject {
                                        Text(roundObject.index.formatted())
                                        Text(roundObject.theoryCumulativeMatchCount.formatted())
                                    }
                                    Text(match.computedOrder.formatted())
                                    FooterButtonView("copier l'id") {
                                        let pasteboard = UIPasteboard.general
                                        pasteboard.string = match.id
                                    }
            #endif
                                }
                            }
                        }
                    } else {
                        ContentUnavailableView("Aucun match à venir", systemImage: "xmark.circle", description: Text(contentUnavailableDescriptionLabel()))
                    }
                }
                .navigationTitle("À suivre sur")
                .toolbarBackground(.visible, for: .navigationBar)
                .navigationBarTitleDisplayMode(.inline)
                .toolbarBackground(.visible, for: .bottomBar)
                .toolbarTitleDisplayMode(.inline)
                .toolbar {
                    ToolbarItem(placement: .topBarLeading) {
                        Button("Retour", role: .cancel) {
                            if readyMatches.isEmpty && matchesLeft.isEmpty {
                                dismissWhenPresentFollowUpMatchIsDismissed = true
                            }
                            dismiss()
                        }
                    }
                    
                    ToolbarItem(placement: .status) {
                        Button {
                            seeAll.toggle()
                        } label: {
                            Text(seeAll ? "Masquer les matchs incomplets" : "Voir tous les matchs")
                                .underline()
                        }
                        .disabled(sortingMode?.canHaveSeeAllOption() == false)
                    }
                    
                    //                ToolbarItem(placement: .principal) {
                    //                    Picker(selection: $sortingMode) {
                    //                        ForEach(sortingModeCases) { sortingMode in
                    //                            Text(sortingMode.localizedSortingModeLabel()).tag(sortingMode)
                    //                        }
                    //                    } label: {
                    //                        Text("Méthode de tri")
                    //                    }
                    //                    .labelsHidden()
                    //                    .pickerStyle(.segmented)
                    //                }
                    
                    ToolbarItem(placement: .topBarTrailing) {
                        Picker(selection: $selectedCourt) {
                            Image(systemName: "sportscourt").tag(nil as Int?)
                            if let tournament = match?.currentTournament() {
                                ForEach(0..<tournament.courtCount, id: \.self) { courtIndex in
                                    Text(tournament.courtName(atIndex: courtIndex)).tag(courtIndex as Int?)
                                }
                            } else {
                                ForEach(0..<12, id: \.self) { courtIndex in
                                    Text(Court.courtIndexedTitle(atIndex: courtIndex)).tag(courtIndex as Int?)
                                }
                            }
                        } label: {
                            Text("Sur le terrain")
                        }
                        .labelsHidden()
                        .underline()
                    }
                }
            }
            .onChange(of: readyMatches) {
                dismissWhenPresentFollowUpMatchIsDismissed = true
                if autoDismiss {
                    dismiss()
                } else if readyMatches.isEmpty && matchesLeft.isEmpty {
                    dismiss()
                }
            }
        }
    }
}