//
//  SearchView.swift
//  LazyBear
//
//  Created by Dennis Concepción Martín on 1/4/21.
//

import SwiftUI
import SwiftlySearch

struct SearchView: View {
    @ObservedObject var searchData = SearchData()
    @State private var searchedText: String = ""
    @State private var showingSearchList = false
    @EnvironmentObject var hudManager: HudManager
    
    var body: some View {
        NavigationView {
            VStack(alignment: .leading) {
                if showingSearchList {
                    CompanyList(searchResult: searchData.searchResult)
                } else {
                    VStack(alignment: .center) {
                        Image("bearSleeping")
                            .resizable()
                            .scaledToFit()
                        
                        Text("Are you looking for something?")
                            .font(.title2)
                            .fontWeight(.semibold)
                            .multilineTextAlignment(.center)
                            .padding(.bottom)
                        
                        Text("Use the search bar to find your favourite company. Type the stock symbol or name, we'll find it!")
                            .multilineTextAlignment(.center)
                    }
                    .padding(.horizontal)
                }
            }
            .onDisappear { self.searchedText = ""; self.showingSearchList = false }
            .navigationTitle("Search")
            .navigationBarTitleDisplayMode(.inline)
            .navigationBarSearch($searchedText)
            .onChange(of: searchedText, perform: { searchedText in
                showSearchList(searchedText)
            })
            .toolbar {
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button(action: { self.hudManager.showSearchHelper = true }) {
                        Image(systemName: "questionmark.circle")
                    }
                }
            }
        }
    }
    
    private func showSearchList(_ searchedText: String) {
        if !searchedText.isEmpty {
            // Encode string with spaces
            let encodedSearchedText = searchedText.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)
            searchData.get(encodedSearchedText!)
            self.showingSearchList = true
        }
    }
}

struct SearchView_Previews: PreviewProvider {
    static var previews: some View {
        SearchView()
    }
}