//
// SplitExercisesListView.swift
// Workouts
//
// Created by rzen on 7/18/25 at 8:38 AM.
//
// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
//

import SwiftUI

struct SplitExercisesListView: View {
    @Environment(\.modelContext) private var modelContext
    @Environment(\.dismiss) private var dismiss

    var model: Split
    
    @State private var showingAddSheet: Bool = false
    @State private var itemToEdit: SplitExerciseAssignment? = nil
    @State private var itemToDelete: SplitExerciseAssignment? = nil

    var body: some View {
        NavigationStack {
            Form {
                List {
                    if let assignments = model.exercises, !assignments.isEmpty {
                        let sortedAssignments = assignments.sorted(by: { $0.order == $1.order ? $0.exerciseName < $1.exerciseName : $0.order < $1.order })
                        
                        ForEach(sortedAssignments) { item in
                            ListItem(
                                title: item.exerciseName,
                                subtitle: "\(item.sets) × \(item.reps) × \(item.weight) lbs  \(item.order)"
                            )
                            .swipeActions {
                                Button {
                                    itemToDelete = item
                                } label: {
                                    Label("Delete", systemImage: "circle")
                                }
                                Button {
                                    itemToEdit = item
                                } label: {
                                    Label("Edit", systemImage: "pencil")
                                }
                                .tint(.indigo)
                            }
                        }
                        .onMove(perform: { indices, destination in
                            var exerciseArray = Array(sortedAssignments)
                            exerciseArray.move(fromOffsets: indices, toOffset: destination)
                            for (index, exercise) in exerciseArray.enumerated() {
                                exercise.order = index
                            }
                            if let modelContext = exerciseArray.first?.modelContext {
                                do {
                                    try modelContext.save()
                                } catch {
                                    print("Error saving after reordering: \(error)")
                                }
                            }
                        })
                    } else {
                        Text("No exercises added yet.")
                    }
                }
            }
            .navigationTitle("\(model.name)")
        }
        .toolbar {
            ToolbarItem(placement: .navigationBarTrailing) {
                Button(action: { showingAddSheet.toggle() }) {
                    Image(systemName: "plus")
                }
            }
        }
        .sheet (isPresented: $showingAddSheet) {
            ExercisePickerView { exerciseName in
                itemToEdit = SplitExerciseAssignment(
                    split: model,
                    exerciseName: exerciseName,
                    order: 0,
                    sets: 3,
                    reps: 10,
                    weight: 40
                )
            }
        }
        .sheet(item: $itemToEdit) { item in
            SplitExerciseAssignmentAddEditView(model: item)
        }
        .confirmationDialog(
            "Delete Exercise?",
            isPresented: .constant(itemToDelete != nil),
            titleVisibility: .visible
        ) {
            Button("Delete", role: .destructive) {
                if let item = itemToDelete {
                    withAnimation {
                        modelContext.delete(item)
                        try? modelContext.save()
                        itemToDelete = nil
                    }
                }
            }
        }

    }
}