//
// ContentView.swift
// Workouts
//
// Created by rzen on 7/15/25 at 7:09 PM.
//
// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
//

import SwiftUI
import SwiftData

struct ContentView: View {
    @Environment(\.modelContext) private var modelContext
    
    @State var activeWorkouts: [Workout] = []
    
    var body: some View {
        NavigationStack {
            if activeWorkouts.isEmpty {
                NoActiveWorkoutView()
            } else {
                ActiveWorkoutListView(workouts: activeWorkouts)
            }
        }
        .onAppear {
            loadActiveWorkouts()
        }
    }
    
    func loadActiveWorkouts () {
        let completedStatus = WorkoutStatus.completed.rawValue
        do {
            self.activeWorkouts = try modelContext.fetch(FetchDescriptor<Workout>(
                predicate: #Predicate<Workout> { workout in
                    workout.status != completedStatus
                },
                sortBy: [
                    SortDescriptor(\Workout.start, order: .reverse)
                ]
            ))
        } catch {
            print("ERROR: failed to load active workouts \(error)")
        }
    }
}

struct NoActiveWorkoutView: View {
    var body: some View {
        VStack(spacing: 16) {
            Image(systemName: "dumbbell.fill")
                .font(.system(size: 40))
                .foregroundStyle(.gray)
            
            Text("No Active Workout")
                .font(.headline)
            
            Text("Start a workout in the main app")
                .font(.caption)
                .foregroundStyle(.gray)
                .multilineTextAlignment(.center)
        }
        .padding()
    }
}

#Preview {
    ContentView()
        .modelContainer(AppContainer.preview)
}