//
//  HistoryView.swift
//  MoneyCounter
//
//  Created by Dallas Groot on 2026-04-06.
//

import SwiftUI
import SwiftData

struct HistoryView: View {
    @Environment(\.dismiss) private var dismiss
    @Environment(\.modelContext) private var modelContext
    
    // Auto-fetches and sorts by date descending
    @Query(sort: \SavedCount.date, order: .reverse) private var savedCounts: [SavedCount]
    
    var viewModel: MoneyCounterViewModel
    
    var body: some View {
        NavigationStack {
            List {
                ForEach(savedCounts) { save in
                    VStack(alignment: .leading, spacing: 6) {
                        HStack {
                            Text(save.date.formatted(date: .abbreviated, time: .shortened))
                                .font(.headline)
                            Spacer()
                            Text(String(format: "$%.2f", save.total))
                                .font(.title3).bold()
                        }
                        
                        if save.startingFloat > 0 {
                            HStack {
                                Text("Float: $\(save.startingFloat, specifier: "%.2f")")
                                    .font(.subheadline).foregroundColor(.secondary)
                                Spacer()
                                Text(save.discrepancy >= 0 ? "Dep: +$\(save.discrepancy, specifier: "%.2f")" : "Short: $\(save.discrepancy, specifier: "%.2f")")
                                    .font(.subheadline)
                                    .foregroundColor(save.discrepancy >= 0 ? .green : .red)
                            }
                        }
                        
                        if !save.notes.isEmpty {
                            Text(save.notes)
                                .font(.caption)
                                .foregroundColor(.secondary)
                                .lineLimit(2)
                        }
                    }
                    .padding(.vertical, 4)
                    .swipeActions(edge: .leading) {
                        Button(action: {
                            resume(save: save)
                        }) {
                            Label("Resume", systemImage: "arrow.counterclockwise")
                        }
                        .tint(.blue)
                    }
                }
                .onDelete(perform: deleteItems)
            }
            .navigationTitle("Count History")
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button("Close") { dismiss() }
                }
            }
            .overlay {
                if savedCounts.isEmpty {
                    ContentUnavailableView("No History", systemImage: "tray", description: Text("Saved counts will appear here."))
                }
            }
        }
    }
    
    private func deleteItems(offsets: IndexSet) {
        for index in offsets {
            modelContext.delete(savedCounts[index])
        }
    }
    
    private func resume(save: SavedCount) {
        viewModel.restore(from: save.snapshotData, float: save.startingFloat)
        dismiss()
    }
}