//
//  WorkoutItem.swift
//  WorkoutsPlus
//
//  Created by Felix Förtsch on 10.08.24.
//

// TODO: Think about what's happening when an exercise (template) is deleted or changed
//	If it is delete -> we just keep the WorkoutItem with the name :)
// The only relevant delete is delete Workout -> Delete Workoutitems
//		{ didSet { self.name = exercise?.name ?? "self.name" } }

//		TODO: Wondering if a SortDescriptor in the Model is useful?
//		https://old.reddit.com/r/SwiftUI/comments/1fnvkud/extracting_the_creation_of_swiftdata_query_into/
//		static var sorted: SortDescriptor<WorkoutItem> {
//				SortDescriptor(\.position, order: .forward)
//		}

//		struct ExerciseValue: ValueType {
//				var value: String = ""
//				var unit: ExerciseUnit
//		}

// TODO: Deload items -> Think about how to model deload/sick/rest/holiday week
//enum PerformanceMetric: String, CaseIterable, CustomStringConvertible {
//		case speed = "m/s"
//		case pace = "s/m"
//
//		var description: String { rawValue }
//}

import Foundation
import SwiftData

@Model
final class WorkoutItem: Nameable, Positionable {
		var id = UUID()
		var name: String
		var workout: Workout?
		// TODO: Make WorkoutItem a protocol so the type can be distinguished by the class type
		var workoutItemType: WorkoutItemType // Differentiates between exercise/rest/set
		var position: Int = 0
		var set: [WorkoutItem] = []
		
		var exercise: Exercise  	   //	Do Push-up 	| Run Marathon
		var plannedReps: Int								// 8 times 				| 1 time
		var plannedValue: Double				// With 10 				| 42,187
		var metric: ExerciseMetric? // kg (weight) | km (distance)
		
		enum WorkoutItemType: Codable {
				case exercise
				case rest
				case set
		}
		
		init(_ exercise: Exercise) {
				self.exercise = exercise
				self.workoutItemType = .exercise
				
				// Push-up
				self.name = exercise.name
				// 8x
				self.plannedReps = 1
				// 0
				self.plannedValue = 0
				// kg
				self.metric = exercise.metric
		}
		
		//		init(set: [WorkoutItem] = []) {
		//				self.workoutItemType = .set
		//				self.name = "Set"
		//				self.plannedReps = 3
		//				self.plannedValue = 0
		//				set.forEach(addChild)
		//		}
		//		init(rest: Double) {
		//				self.workoutItemType = .rest
		//				self.name = "Rest"
		//				self.plannedReps = 1
		//				self.plannedValue = rest
		//				self.metric = .time
		//		}
		func addChild(_ child: WorkoutItem) {
				if self.workoutItemType == .set {
						self.set.append(child)
				}
		}
}

extension WorkoutItem {
		static let sampleDataRecommendedRoutine: [WorkoutItem] = {
				var exercises = [WorkoutItem]()
				for exercise in Exercise.sampleDataRecommendedRoutine {
						exercises.append(WorkoutItem(exercise))
				}
				return exercises
		}()
		
		static let sampleDataRings: [WorkoutItem] = {
				var exercises = [WorkoutItem]()
				for exercise in Exercise.sampleDataRings {
						exercises.append(WorkoutItem(exercise))
				}
				return exercises
		}()
}