//
//  SettingsView.swift
//  Feels
//
//  Created by Trey Tartt on 1/8/22.
//

import SwiftUI

struct SettingsView: View {
    @Environment(\.dismiss) var dismiss
    
    @State private var currentDate = Date() {
        didSet {
            if self.showReminder {
                LocalNotification.scheduleReminder(atTime: self.currentDate)
            }
        }
    }
    
    @State private var showReminder: Bool = false {
        didSet {
            if self.showReminder {
                LocalNotification.testIfEnabled(completion: { result in
                    switch result{
                    case .success(_):
                        LocalNotification.scheduleReminder(atTime: self.currentDate)
                    case .failure(_):
                        // show error
                        break
                    }
                })
            } else {
                LocalNotification.removeNotificaiton()
            }
        }
    }
    
    var body: some View { ZStack {
        Color(UIColor.secondarySystemBackground)
        
        VStack {
            closeButtonView
                .padding()
            notificationCell
            randomShitCell
            addTestDataCell
            clearDB
            whyBackgroundMode
            Spacer()
        }
        .padding()
    }
    }
    
    private var closeButtonView: some View {
        HStack{
            Spacer()
            Button(action: {
                dismiss()
            }, label: {
                Text("Exit")
                    .font(.body)
                    .foregroundColor(Color(UIColor.systemBlue))
            })
        }
    }
    
    private var notificationCell: some View {
        ZStack {
            Color(UIColor.systemBackground)
            VStack {
                Toggle("Would you like to be reminded?", isOn: $showReminder)
                    .padding()
                DatePicker("", selection: $currentDate, displayedComponents: .hourAndMinute)
                    .disabled(showReminder == false)
                    .padding()
            }
        }
        .fixedSize(horizontal: false, vertical: true)
        .clipShape(RoundedRectangle(cornerRadius: 25, style: .continuous))
    }
    
    private var randomShitCell: some View {
        ZStack {
            Color(UIColor.systemBackground)
            VStack {
                Text("random shit")
                    .padding()
            }
        }
        .fixedSize(horizontal: false, vertical: true)
        .clipShape(RoundedRectangle(cornerRadius: 25, style: .continuous))
    }
    
    private var addTestDataCell: some View {
        ZStack {
            Color(UIColor.systemBackground)
            Button(action: {
                PersistenceController.shared.populateTestData()
            }, label: {
                Text("Add test data")
            })
                .padding()
        }
        .fixedSize(horizontal: false, vertical: true)
        .clipShape(RoundedRectangle(cornerRadius: 25, style: .continuous))
    }
    
    private var clearDB: some View {
        ZStack {
            Color(UIColor.systemBackground)
            Button(action: {
                PersistenceController.shared.clearDB()
            }, label: {
                Text("Clear DB")
            })
                .padding()
        }
        .fixedSize(horizontal: false, vertical: true)
        .clipShape(RoundedRectangle(cornerRadius: 25, style: .continuous))
    }
    
    private var whyBackgroundMode: some View {
        ZStack {
            Color(UIColor.systemBackground)
            Text("we do bg mode b/c we can")
                .padding()
        }
        .fixedSize(horizontal: false, vertical: true)
        .clipShape(RoundedRectangle(cornerRadius: 25, style: .continuous))
    }
}

struct SettingsView_Previews: PreviewProvider {
    static var previews: some View {
        SettingsView()
        
        SettingsView()
            .preferredColorScheme(.dark)
    }
}