//
//  PreviewData.swift
//  Werkout_ios
//
//  Created by Trey Tartt on 6/14/23.
//

import Foundation

class PreviewData {
    private class func decodeFromBundle<T: Decodable>(_ fileName: String,
                                                      as type: T.Type) -> T? {
        guard let filepath = Bundle.main.path(forResource: fileName, ofType: "json"),
              let data = try? Data(NSData(contentsOfFile: filepath)) else {
            return nil
        }
        
        return try? JSONDecoder().decode(T.self, from: data)
    }
    
    class func workout() -> Workout {
        if let workout = decodeFromBundle("WorkoutDetail", as: Workout.self) {
            return workout
        }
        if let firstWorkout = allWorkouts().first {
            return firstWorkout
        }
        
        return Workout(id: -1, name: "Unavailable")
    }
    
    class func allWorkouts() -> [Workout] {
        decodeFromBundle("AllWorkouts", as: [Workout].self) ?? []
    }
    
    class func parseExercises() -> [Exercise] {
        decodeFromBundle("Exercises", as: [Exercise].self) ?? []
    }
    
    class func parseEquipment() -> [Equipment] {
        decodeFromBundle("Equipment", as: [Equipment].self) ?? []
    }
    
    class func parseMuscle() -> [Muscle] {
        decodeFromBundle("AllMuscles", as: [Muscle].self) ?? []
    }
    
    class func parseRegisterdUser() -> RegisteredUser {
        decodeFromBundle("RegisteredUser", as: RegisteredUser.self) ??
        RegisteredUser(id: -1,
                       firstName: nil,
                       lastName: nil,
                       image: nil,
                       nickName: nil,
                       token: nil,
                       email: nil,
                       hasNSFWToggle: nil)
    }
    
    class func parseCompletedWorkouts() -> [CompletedWorkout] {
        decodeFromBundle("CompletedWorkouts", as: [CompletedWorkout].self) ?? []
    }
}