//
//  SettingsView.swift
//  Passepartout
//
//  Created by Davide De Rosa on 8/19/22.
//  Copyright (c) 2023 Davide De Rosa. All rights reserved.
//
//  https://github.com/passepartoutvpn
//
//  This file is part of Passepartout.
//
//  Passepartout is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  Passepartout is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with Passepartout.  If not, see <http://www.gnu.org/licenses/>.
//

import PassepartoutLibrary
import SwiftUI

struct SettingsView: View {
    @ObservedObject private var profileManager: ProfileManager

    @ObservedObject private var productManager: ProductManager

    @Environment(\.presentationMode) private var presentationMode

    @AppStorage(AppPreference.locksInBackground.key) private var locksInBackground = false

    @Binding private var shouldEnableCloudSyncing: Bool

    @State private var isErasingCloudStore = false

    private let versionString = Constants.Global.appVersionString

    init() {
        profileManager = .shared
        productManager = .shared

        _shouldEnableCloudSyncing = .init {
            AppContext.shared.shouldEnableCloudSyncing
        } set: { isEnabled in
            withAnimation {
                AppContext.shared.shouldEnableCloudSyncing = isEnabled
            }
        }
    }

    var body: some View {
        List {
            #if !targetEnvironment(macCatalyst)
            preferencesSection
            #endif
            iCloudSection
            diagnosticsSection
            aboutSection
        }.toolbar {
            themeCloseItem(presentationMode: presentationMode)
        }.themeSecondaryView()
        .navigationTitle(L10n.Settings.title)
    }
}

// MARK: -

private extension SettingsView {
    var preferencesSection: some View {
        Section {
            Toggle(L10n.Settings.Items.LocksInBackground.caption, isOn: $locksInBackground)
        } header: {
            Text(L10n.Preferences.title)
        }
    }

    var iCloudSection: some View {
        Section {
            Toggle(L10n.Settings.Items.ShouldEnableCloudSyncing.caption, isOn: $shouldEnableCloudSyncing)
            Button(L10n.Settings.Items.EraseCloudStore.caption) {
                isErasingCloudStore = true
                Task {
                    await AppContext.shared.eraseCloudKitStore()
                    isErasingCloudStore = false
                }
            }.withTrailingProgress(when: isErasingCloudStore)
            .disabled(shouldEnableCloudSyncing || isErasingCloudStore)
        } header: {
            Text(Unlocalized.Other.iCloud)
        } footer: {
            Text(L10n.Settings.Sections.Icloud.footer)
        }
    }

    var diagnosticsSection: some View {
        Section {
            DiagnosticsRow(currentProfile: profileManager.currentProfile)
        }
    }

    var aboutSection: some View {
        Section {
            NavigationLink {
                DonateView()
            } label: {
                Text(L10n.Settings.Items.Donate.caption)
            }.disabled(!productManager.canMakePayments())
            NavigationLink {
                AboutView()
            } label: {
                Text(L10n.About.title)
            }
        } footer: {
            HStack {
                Spacer()
                Text(versionString)
                Spacer()
            }
        }
    }
}