// Copyright © 2023 Rangeproof Pty Ltd. All rights reserved.

import SwiftUI
import SessionUIKit
import SignalUtilitiesKit
import SessionUtilitiesKit

struct RecoveryPasswordView: View {
    @EnvironmentObject var host: HostWrapper
    
    @State private var copied: Bool = false
    private let mnemonic: String
    private let flow: Onboarding.Flow
    
    static let cornerRadius: CGFloat = 13
    
    public init(flow: Onboarding.Flow) throws {
        self.mnemonic = try Identity.mnemonic()
        self.flow = flow
    }
    
    public init(hardcode: String, flow: Onboarding.Flow) {
        self.mnemonic = hardcode
        self.flow = flow
    }
    
    var body: some View {
        ZStack(alignment: .center) {
            if #available(iOS 14.0, *) {
                ThemeManager.currentTheme.colorSwiftUI(for: .backgroundPrimary).ignoresSafeArea()
            } else {
                ThemeManager.currentTheme.colorSwiftUI(for: .backgroundPrimary)
            }
            
            VStack(
                alignment: .leading,
                spacing: Values.mediumSpacing
            ) {
                Spacer()
                
                HStack(
                    alignment: .bottom,
                    spacing: Values.smallSpacing
                ) {
                    Text("onboarding_recovery_password_title".localized())
                        .bold()
                        .font(.system(size: Values.veryLargeFontSize))
                        .foregroundColor(themeColor: .textPrimary)
                    
                    Image("SessionShield")
                        .resizable()
                        .renderingMode(.template)
                        .foregroundColor(themeColor: .textPrimary)
                        .scaledToFit()
                        .frame(
                            maxWidth: Values.largeFontSize,
                            maxHeight: Values.largeFontSize
                        )
                        .padding(.bottom, Values.verySmallSpacing)
                }
                
                Text("onboarding_recovery_password_explanation".localized())
                    .font(.system(size: Values.smallFontSize))
                    .foregroundColor(themeColor: .textPrimary)
                
                Text(mnemonic)
                    .font(.spaceMono(size: Values.verySmallFontSize))
                    .multilineTextAlignment(.center)
                    .foregroundColor(themeColor: .primary)
                    .frame(maxWidth: .infinity)
                    .padding(.all, Values.largeSpacing)
                    .overlay(
                        RoundedRectangle(
                            cornerSize: CGSize(
                                width: Self.cornerRadius,
                                height: Self.cornerRadius
                            )
                        )
                        .stroke(themeColor: .borderSeparator)
                    )
                
                Button {
                    copyRecoveryPassword()
                } label: {
                    let buttonTitle: String = self.copied ? "copied".localized() : "tap_to_copy".localized()
                    Text(buttonTitle)
                        .font(.system(size: Values.verySmallFontSize))
                        .foregroundColor(themeColor: .textSecondary)
                }
                .frame(maxWidth: .infinity)
                
                Spacer()
            }
            .padding(.horizontal, Values.veryLargeSpacing)
            .padding(.bottom, Values.massiveSpacing + Values.largeButtonHeight)
            
            VStack() {
                Spacer()
                
                Button {
                    finishRegister()
                } label: {
                    Text("continue_2".localized())
                        .bold()
                        .font(.system(size: Values.smallFontSize))
                        .foregroundColor(themeColor: .sessionButton_text)
                        .frame(
                            maxWidth: .infinity,
                            maxHeight: Values.largeButtonHeight,
                            alignment: .center
                        )
                        .overlay(
                            Capsule()
                                .stroke(themeColor: .sessionButton_border)
                        )
                }
                .padding(.horizontal, Values.massiveSpacing)
            }
            .padding(.vertical, Values.mediumSpacing)
        }
    }
    
    private func copyRecoveryPassword() {
        UIPasteboard.general.string = self.mnemonic
        self.copied = true
    }
    
    private func finishRegister() {
        let homeVC: HomeVC = HomeVC(flow: self.flow)
        self.host.controller?.navigationController?.setViewControllers([ homeVC ], animated: true)
        return
    }
}

struct RecoveryPasswordView_Previews: PreviewProvider {
    static var previews: some View {
        RecoveryPasswordView(hardcode: "Voyage  urban  toyed  maverick peculiar  tuxedo  penguin  tree grass  building  listen  speak", flow: .register)
    }
}