//
//  CountdownView.swift
//  LeCountdown
//
//  Created by Laurent Morvillier on 25/01/2023.
//

import SwiftUI
import WidgetKit
import CoreData

struct SingleCountdownView: View {
    
    @Environment(\.widgetFamily) var family: WidgetFamily
    
    var countdown: Countdown
    
    var body: some View {
        VStack {
            Text(countdown.name ?? "")
            Text(countdown.duration.minuteSecond)
        }
        .font(self.font)
        .widgetURL(countdown.url)
    }
    
    private var font: Font {
        switch family {
        case .systemSmall, .systemMedium, .systemLarge, .systemExtraLarge:
            return .title2
        default:
            return .body
        }
    }
    
}

struct MultiCountdownView: View {
    
    @Environment(\.widgetFamily) var family: WidgetFamily
    
    var countdowns: [Countdown]
    
    var body: some View {
        
        if countdowns.isEmpty {
            VoidView()
        } else {
            HStack {
                ForEach(countdowns) { countdown in
                    
                    Link(destination: countdown.url) {
                        VStack {
                            Text(countdown.name ?? "")
                            Text(countdown.duration.minuteSecond)
                        }
                        .font(self.font)
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
                    }
                    
                }
            }.frame(maxWidth: .infinity)
        }
        
    }
    
    private var font: Font {
        switch family {
        case .systemSmall, .systemMedium, .systemLarge, .systemExtraLarge:
            return .title2
        default:
            return .body
        }
    }
    
}

struct CountdownView_Previews: PreviewProvider {
    static var previews: some View {
        
        SingleCountdownView(countdown: Countdown.fake(context: PersistenceController.preview.container.viewContext)).previewContext(WidgetPreviewContext(family: .accessoryRectangular))
        MultiCountdownView(countdowns: self.countdowns(context: PersistenceController.preview.container.viewContext)).previewContext(WidgetPreviewContext(family: .systemMedium))
    }
    
    static func countdowns(context: NSManagedObjectContext) -> [Countdown] {
        return (0..<4).map { _ in
            Countdown.fake(context: context)
        }
    }
    
}