import SwiftUI
import SwiftData

// This view can only be viewed, if there exists a WorkoutSession that can be considered active (a person working out).
struct ActiveWorkoutSession: View {
		@Environment(\.modelContext) private var modelContext
		
		@Default(\.isWorkingOut) var isWorkingOut
		@State var isTimerRunning: Bool = true
		
		@Query(sort: \WorkoutSession.name) var workoutSessions: [WorkoutSession]
		@Binding var activeWorkoutSession: WorkoutSession?
		
		var body: some View {
				VStack {
						List {
								Section(header: Text("Workout")) {
										Text(activeWorkoutSession!.name)
								}
								Section(header: Text("Exercises")) {
										ForEach(activeWorkoutSession!.workoutSessionItems) { workoutItem in
												ActiveWorkoutSessionListItem(workoutItem: workoutItem)
										}
								}
						}
				}
				.navigationTitle("Session")
				.toolbar {
								Button(action: {
										isWorkingOut = false
										activeWorkoutSession?.stop()
								}) {
										HStack {
												Image(systemName: "stop.fill")
												Text("Stop")
										}
								}
								.bold()
								.fontDesign(.rounded)
								.tint(.red)
				}
		}
		
		private func getActiveWorkoutItems(activeWorkout: Workout?) -> [WorkoutItem] {
				guard let activeWorkout else { return [] }
				return activeWorkout.getWorkoutItems()
		}
		
		//		TODO: Put this somewhere general
		private func getItem<Item: Nameable>(from array: [Item], by id: String) -> Item? {
				let filteredItems = array.filter { $0.id == UUID(uuidString: id) }
				return filteredItems.count == 1 ? filteredItems.first : nil
		}
}

#Preview {
		@Previewable @State var activeWorkoutSession: WorkoutSession?
		@Previewable @State var workout = Workout.sampleData.first!
		
		NavigationStack {
				ActiveWorkoutSession(activeWorkoutSession: $activeWorkoutSession)
		}
		.onAppear {
				Defaults.shared.isWorkingOut = false
		}
		.modelContainer(SampleData.shared.modelContainer)
}

//#Preview("Empty modelContainer") {
//		@Previewable @State var activeWorkoutSession: WorkoutSession?
//
//		NavigationStack {
//				ActiveWorkoutSession(activeWorkoutSession: $activeWorkoutSession)
//		}
//		.onAppear {
//				Defaults.shared.isWorkingOut = false
//		}
//}