//
//  PortraitView.swift
//  Bunch O' Dice
//
//  Created by Rory Hinnen on 22/6/18.
//

import SwiftUI

struct MainView: View {

    enum MenuView: Int {
        case history, add, settings

        func icon() -> Image {
            switch self {
            case .history: return Image(systemName: "folder")
            case .settings: return Image(systemName: "square.and.pencil")
            case .add: return Image(systemName: "folder.badge.plus")
            }
        }
    }

    @EnvironmentObject var current: Roll
    @ObservedObject var sheet = SettingsSheet()

    private let controlSize = 30.0

    var body: some View {
        VStack {
            StatePickerView()
            VStack(spacing: 8) {
                RollSummaryView()
                switch current.state {
                case .wound: WoundCalculatorView()
                case .armour: ArmourCalculatorView()
                default: HitCalculatorView()
                }
                InfoAreaView()
                Spacer()
            }
        }
        .toolbar {
            ToolbarItemGroup(placement: .bottomBar) {
                HStack {
                    Button(action: { sheet.state = .history }) {
                        MenuView.history.icon()
                    }
                    Button(action: { current.history.insert(Event(total: current.result, pool: current.dice, state: current.state), at: 0) }) {
                        MenuView.add.icon()
                    }
                    Button(action: { sheet.state = .settings }) {
                        MenuView.settings.icon()
                    }
                }
                .font(.system(size: controlSize))
                .foregroundColor(.primary)
            }
        }
        .sheet(isPresented: $sheet.isShowing) {
            switch sheet.state {
            case .settings: SettingsView(isShowing: $sheet.isShowing)
            case .history: HistoryView(isShowing: $sheet.isShowing)
            default: EmptyView()
            }
        }
    }
}

#Preview("Hit") {
    MainView().environmentObject(Roll())
}

#Preview("Wound") {
    MainView().environmentObject({
        let r = Roll()
        r.state = .wound
        return r
    }())
}

#Preview("Armour") {
    MainView().environmentObject({
        let r = Roll()
        r.state = .armour
        return r
    }())
}