//
//  AddMoodHeaderView.swift
//  Feels
//
//  Created by Trey Tartt on 1/5/22.
//

import Foundation

import SwiftUI
import CoreData

struct AddMoodHeaderView: View {
    @Environment(\.managedObjectContext) private var viewContext
    
    var body: some View {
        ZStack {
            Color(UIColor.secondarySystemBackground)
            
            VStack {
                Text("How are you feeling today?")
                    .font(.title)
                    .foregroundColor(Color(UIColor.label))
                    .padding()
                HStack{
                    ForEach(Mood.allValues) { mood in
                        VStack {
                            Button(action: {
                                addItem(withMoodValue: mood.rawValue)
                            }, label: {
                                mood.icon
                                    .font(.system(size: 50))
                            })
                            
                            //Text(mood.strValue)
                        }.frame(minWidth: 0, maxWidth: .infinity)
                    }
                }
                .padding([.leading, .trailing, .bottom])
            }
        }
        .clipShape(RoundedRectangle(cornerRadius: 25, style: .continuous))
        .frame(minHeight: 85, maxHeight: 140)
        .frame(minWidth: 0, maxWidth: .infinity)
        .padding()
    }
    
    private func addItem(withMoodValue moodValue: Int) {
        withAnimation {
            let newItem = MoodEntry(context: viewContext)
            newItem.timestamp = Date()
            newItem.moodValue = Int16(moodValue)
            newItem.date = Date()
            
            do {
                try viewContext.save()
            } catch {
                // Replace this implementation with code to handle the error appropriately.
                // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
                let nsError = error as NSError
                fatalError("Unresolved error \(nsError), \(nsError.userInfo)")
            }
        }
    }
}

struct AddMoodHeaderView_Previews: PreviewProvider {
    static var previews: some View {
        Group {
            AddMoodHeaderView().environment(\.managedObjectContext, PersistenceController.shared.container.viewContext)
            
            AddMoodHeaderView().preferredColorScheme(.dark).environment(\.managedObjectContext, PersistenceController.shared.container.viewContext)
            
            AddMoodHeaderView().environment(\.managedObjectContext, PersistenceController.shared.container.viewContext)
            
            AddMoodHeaderView().preferredColorScheme(.dark).environment(\.managedObjectContext, PersistenceController.shared.container.viewContext)
        }
    }
}