//
//  WorkoutSession.swift
//  WorkoutsPlus
//
//  Created by Felix Förtsch on 07.09.24.
//

import Foundation
import SwiftData

@Model
final class WorkoutSession: Nameable {
		var id = UUID()
		var name: String
		//		TODO: Think about if a refrence to the workout makes sense; a Workout could change.
		//		var workout: Workout
		var workoutSessionItems: [WorkoutSessionItem] = []
		
		init(start workout: Workout) {
				self.name = workout.name
				for workoutItem in workout.getWorkoutItems() {
						workoutSessionItems.append(WorkoutSessionItem(workoutSession: self, planned: workoutItem))
				}
		}
		
		var isPaused = false
		
		// My workout session started at:
		var startDate: Date = Date.now
		// My workout session was completed at:
		var stopDate: Date? = nil
		//		My workout session took me x seconds.
		var workoutDuration: TimeInterval = 0.0
		var pauseDuration: TimeInterval = 0.0
		
		// Exercise Progress
		var currentExercise = 0
		
		func isCompleted() -> Bool {
				stopDate != nil
		}
		
		// MARK: -- Workout Controls
//		func pause() {
//				isPaused = true
//		}
//
//		func resume() {
//				isPaused = false
//		}
		
		// Call stop() to terminate the workout.
		func stop() -> WorkoutLogItem {
				stopDate = Date.now
//				duration = stopDate!.timeIntervalSince(startDate)
				
				return WorkoutLogItem(log: self)
		}
		
		func prevExercise() {
				workoutSessionItems[currentExercise].startDate = Date.now
				if currentExercise > 0 {
						currentExercise -= 1
				}
		}
		
		func nextExercise() {
				workoutSessionItems[currentExercise].stopDate = Date.now
				if currentExercise < workoutSessionItems.count - 1 {
						currentExercise += 1
				}
		}
		
		// MARK: -- Workout Information
		func getFormattedDuration() -> String {
				let elapsedTime = Date.now.timeIntervalSince(startDate)
				let formatter = DateComponentsFormatter()
				formatter.allowedUnits = [.hour, .minute, .second]
				formatter.unitsStyle = .positional
				return formatter.string(from: elapsedTime) ?? "00:00:00"
		}
		
		func getTotalExerciseCount() -> Double {
				return Double(workoutSessionItems.count)
		}
		
		func getCurrentExerciseIndex() -> Double {
				return Double(currentExercise)
		}
		
		func getCurrentExerciseName() -> String {
				return workoutSessionItems[currentExercise].name
		}
}