//
// SplitsView.swift
// Workouts
//
// Created by rzen on 7/17/25 at 6:55 PM.
//
// Copyright 2025 Rouslan Zenetl. All Rights Reserved.
//

import SwiftUI
import SwiftData

struct SplitsView: View {
    @Environment(\.modelContext) private var modelContext
    @Environment(\.dismiss) private var dismiss
    
    @State var splits: [Split] = []
    
    @State private var showingAddSheet: Bool = false
    @State private var allowSorting: Bool = true

    var body: some View {
        NavigationStack {
            ScrollView {
                LazyVGrid(columns: [GridItem(.flexible()), GridItem(.flexible())], spacing: 16) {
                    SortableForEach($splits, allowReordering: $allowSorting) { split, dragging in
                        NavigationLink {
                            SplitDetailView(split: split)
                        } label: {
                            SplitItem(
                                name: split.name,
                                color: Color.color(from: split.color),
                                systemImageName: split.systemImage,
                                exerciseCount: split.exercises?.count ?? 0
                            )
                            .overlay(dragging ? Color.white.opacity(0.8) : Color.clear)
                        }
                    }
                }
                .padding()
            }
            .navigationTitle("Splits")
            .onAppear(perform: loadSplits)
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button(action: { showingAddSheet.toggle() }) {
                        Image(systemName: "plus")
                    }
                }
            }
        }
        .sheet (isPresented: $showingAddSheet) {
            SplitAddEditView(model: Split(name: "New Split"))
        }

    }
    
    func loadSplits () {
        do {
            self.splits = try modelContext.fetch(FetchDescriptor<Split>(
                sortBy: [
                    SortDescriptor(\Split.order),
                    SortDescriptor(\Split.name)
                ]
            ))
        } catch {
            print("ERROR: failed to load splits \(error)")
        }
    }
}