//
//  WhatsNewView.swift
//  SimpleX (iOS)
//
//  Created by Evgeny on 24/12/2022.
//  Copyright © 2022 SimpleX Chat. All rights reserved.
//

import SwiftUI

private struct VersionDescription {
    var version: String
    var post: URL?
    var features: [FeatureDescription]
}

private struct FeatureDescription {
    var icon: String
    var title: LocalizedStringKey
    var description: LocalizedStringKey
}

private let versionDescriptions: [VersionDescription] = [
    VersionDescription(
        version: "v4.2",
        post: URL(string: "https://simplex.chat/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html"),
        features: [
            FeatureDescription(
                icon: "checkmark.shield",
                title: "Security assessment",
                description: "SimpleX Chat security was audited by Trail of Bits."
            ),
            FeatureDescription(
                icon: "person.2",
                title: "Group links",
                description: "Admins can create the links to join groups."
            ),
            FeatureDescription(
                icon: "checkmark",
                title: "Auto-accept contact requests",
                description: "With optional welcome message."
            ),
        ]
    ),
    VersionDescription(
        version: "v4.3",
        post: URL(string: "https://simplex.chat/blog/20221206-simplex-chat-v4.3-voice-messages.html"),
        features: [
            FeatureDescription(
                icon: "mic",
                title: "Voice messages",
                description: "Max 30 seconds, received instantly."
            ),
            FeatureDescription(
                icon: "trash.slash",
                title: "Irreversible message deletion",
                description: "Your contacts can allow full message deletion."
            ),
            FeatureDescription(
                icon: "externaldrive.connected.to.line.below",
                title: "Improved server configuration",
                description: "Add servers by scanning QR codes."
            ),
            FeatureDescription(
                icon: "eye.slash",
                title: "Improved privacy and security",
                description: "Hide app screen in the recent apps."
            ),
        ]
    ),
    VersionDescription(
        version: "v4.4",
        post: URL(string: "https://simplex.chat/blog/20230103-simplex-chat-v4.4-disappearing-messages.html"),
        features: [
            FeatureDescription(
                icon: "stopwatch",
                title: "Disappearing messages",
                description: "Sent messages will be deleted after set time."
            ),
            FeatureDescription(
                icon: "ellipsis.circle",
                title: "Live messages",
                description: "Recipients see updates as you type them."
            ),
            FeatureDescription(
                icon: "checkmark.shield",
                title: "Verify connection security",
                description: "Compare security codes with your contacts."
            ),
            FeatureDescription(
                icon: "camera",
                title: "GIFs and stickers",
                description: "Send them from gallery or custom keyboards."
            ),
            FeatureDescription(
                icon: "character",
                title: "French interface",
                description: "Thanks to the users – contribute via Weblate!"
            )
        ]
    ),
    VersionDescription(
        version: "v4.5",
        post: URL(string: "https://simplex.chat/blog/20230204-simplex-chat-v4-5-user-chat-profiles.html"),
        features: [
            FeatureDescription(
                icon: "person.crop.rectangle.stack",
                title: "Multiple chat profiles",
                description: "Different names, avatars and transport isolation."
            ),
            FeatureDescription(
                icon: "rectangle.and.pencil.and.ellipsis",
                title: "Message draft",
                description: "Preserve the last message draft, with attachments."
            ),
            FeatureDescription(
                icon: "network.badge.shield.half.filled",
                title: "Transport isolation",
                description: "By chat profile (default) or [by connection](https://simplex.chat/blog/20230204-simplex-chat-v4-5-user-chat-profiles.html#transport-isolation) (BETA)."
            ),
            FeatureDescription(
                icon: "lock.doc",
                title: "Private filenames",
                description: "To protect timezone, image/voice files use UTC."
            ),
            FeatureDescription(
                icon: "battery.25",
                title: "Reduced battery usage",
                description: "More improvements are coming soon!"
            ),
            FeatureDescription(
                icon: "character",
                title: "Italian interface",
                description: "Thanks to the users – [contribute via Weblate](https://github.com/simplex-chat/simplex-chat/tree/stable#help-translating-simplex-chat)!"
            )
        ]
    ),
    VersionDescription(
        version: "v4.6",
        post: URL(string: "https://simplex.chat/blog/20230328-simplex-chat-v4-6-hidden-profiles.html"),
        features: [
            FeatureDescription(
                icon: "lock",
                title: "Hidden chat profiles",
                description: "Protect your chat profiles with a password!"
            ),
            FeatureDescription(
                icon: "phone.arrow.up.right",
                title: "Audio and video calls",
                description: "Fully re-implemented - work in background!"
            ),
            FeatureDescription(
                icon: "flag",
                title: "Group moderation",
                description: "Now admins can:\n- delete members' messages.\n- disable members (\"observer\" role)"
            ),
            FeatureDescription(
                icon: "plus.message",
                title: "Group welcome message",
                description: "Set the message shown to new members!"
            ),
            FeatureDescription(
                icon: "battery.50",
                title: "Further reduced battery usage",
                description: "More improvements are coming soon!"
            ),
            FeatureDescription(
                icon: "character",
                title: "Chinese and Spanish interface",
                description: "Thanks to the users – [contribute via Weblate](https://github.com/simplex-chat/simplex-chat/tree/stable#help-translating-simplex-chat)!"
            ),
        ]
    ),
    VersionDescription(
        version: "v5.0",
        post: URL(string: "https://simplex.chat/blog/20230422-simplex-chat-vision-funding-v5-videos-files-passcode.html"),
        features: [
            FeatureDescription(
                icon: "arrow.up.doc",
                title: "Videos and files up to 1gb",
                description: "Fast and no wait until the sender is online!"
            ),
            FeatureDescription(
                icon: "lock",
                title: "App passcode",
                description: "Set it instead of system authentication."
            ),
            FeatureDescription(
                icon: "character",
                title: "Polish interface",
                description: "Thanks to the users – [contribute via Weblate](https://github.com/simplex-chat/simplex-chat/tree/stable#help-translating-simplex-chat)!"
            ),
        ]
    ),
    // Also
    // preference to disable calls per contact
    // access welcome message via a group profile
    VersionDescription(
        version: "v5.1",
        post: URL(string: "https://simplex.chat/blog/20230523-simplex-chat-v5-1-message-reactions-self-destruct-passcode.html"),
        features: [
            FeatureDescription(
                icon: "face.smiling",
                title: "Message reactions",
                description: "Finally, we have them! 🚀"
            ),
            FeatureDescription(
                icon: "arrow.up.message",
                title: "Better messages",
                description: "- voice messages up to 5 minutes.\n- custom time to disappear.\n- editing history."
            ),
            FeatureDescription(
                icon: "lock",
                title: "Self-destruct passcode",
                description: "All data is erased when it is entered."
            ),
            FeatureDescription(
                icon: "character",
                title: "Japanese interface",
                description: "Thanks to the users – [contribute via Weblate](https://github.com/simplex-chat/simplex-chat/tree/stable#help-translating-simplex-chat)!"
            ),
        ]
    ),
    VersionDescription(
        version: "v5.2",
        post: URL(string: "https://simplex.chat/blog/20230722-simplex-chat-v5-2-message-delivery-receipts.html"),
        features: [
            FeatureDescription(
                icon: "checkmark",
                title: "Message delivery receipts!",
                description: "The second tick we missed! ✅"
            ),
            FeatureDescription(
                icon: "star",
                title: "Find chats faster",
                description: "Filter unread and favorite chats."
            ),
            FeatureDescription(
                icon: "exclamationmark.arrow.triangle.2.circlepath",
                title: "Keep your connections",
                description: "Fix encryption after restoring backups."
            ),
            FeatureDescription(
                icon: "stopwatch",
                title: "Make one message disappear",
                description: "Even when disabled in the conversation."
            ),
            FeatureDescription(
                icon: "gift",
                title: "A few more things",
                description: "- more stable message delivery.\n- a bit better groups.\n- and more!"
            ),
        ]
    ),
    VersionDescription(
        version: "v5.3",
        post: URL(string: "https://simplex.chat/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html"),
        features: [
            FeatureDescription(
                icon: "desktopcomputer",
                title: "New desktop app!",
                description: "Create new profile in [desktop app](https://simplex.chat/downloads/). 💻"
            ),
            FeatureDescription(
                icon: "lock",
                title: "Encrypt stored files & media",
                description: "App encrypts new local files (except videos)."
            ),
            FeatureDescription(
                icon: "magnifyingglass",
                title: "Discover and join groups",
                description: "- connect to [directory service](simplex:/contact#/?v=1-4&smp=smp%3A%2F%2Fu2dS9sG8nMNURyZwqASV4yROM28Er0luVTx5X1CsMrU%3D%40smp4.simplex.im%2FeXSPwqTkKyDO3px4fLf1wx3MvPdjdLW3%23%2F%3Fv%3D1-2%26dh%3DMCowBQYDK2VuAyEAaiv6MkMH44L2TcYrt_CsX3ZvM11WgbMEUn0hkIKTOho%253D%26srv%3Do5vmywmrnaxalvz6wi3zicyftgio6psuvyniis6gco6bp6ekl4cqj4id.onion) (BETA)!\n- delivery receipts (up to 20 members).\n- faster and more stable."
            ),
            FeatureDescription(
                icon: "theatermasks",
                title: "Simplified incognito mode",
                description: "Toggle incognito when connecting."
            ),
            FeatureDescription(
                icon: "character",
                title: "\(4) new interface languages",
                description: "Bulgarian, Finnish, Thai and Ukrainian - thanks to the users and [Weblate](https://github.com/simplex-chat/simplex-chat/tree/stable#help-translating-simplex-chat)!"
            ),
        ]
    ),
    VersionDescription(
        version: "v5.4",
        post: URL(string: "https://simplex.chat/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html"),
        features: [
            FeatureDescription(
                icon: "desktopcomputer",
                title: "Link mobile and desktop apps! 🔗",
                description: "Via secure quantum resistant protocol."
            ),
            FeatureDescription(
                icon: "person.2",
                title: "Better groups",
                description: "Faster joining and more reliable messages."
            ),
            FeatureDescription(
                icon: "theatermasks",
                title: "Incognito groups",
                description: "Create a group using a random profile."
            ),
            FeatureDescription(
                icon: "hand.raised",
                title: "Block group members",
                description: "To hide unwanted messages."
            ),
            FeatureDescription(
                icon: "gift",
                title: "A few more things",
                description: "- optionally notify deleted contacts.\n- profile names with spaces.\n- and more!"
            ),
        ]
    ),
]

private let lastVersion = versionDescriptions.last!.version

func setLastVersionDefault() {
    UserDefaults.standard.set(lastVersion, forKey: DEFAULT_WHATS_NEW_VERSION)
}

func shouldShowWhatsNew() -> Bool {
    let v = UserDefaults.standard.string(forKey: DEFAULT_WHATS_NEW_VERSION)
    setLastVersionDefault()
    return v != lastVersion
}

struct WhatsNewView: View {
    @Environment(\.dismiss) var dismiss: DismissAction
    @State var currentVersion = versionDescriptions.count - 1
    @State var currentVersionNav = versionDescriptions.count - 1
    var viaSettings = false

    var body: some View {
        VStack {
            TabView(selection: $currentVersion) {
                ForEach(Array(versionDescriptions.enumerated()), id: \.0) { (i, v) in
                    VStack(alignment: .leading, spacing: 16) {
                        Text("New in \(v.version)")
                            .font(.title)
                            .foregroundColor(.secondary)
                            .frame(maxWidth: .infinity)
                            .padding(.vertical)
                        ForEach(v.features, id: \.icon) { f in
                            featureDescription(f.icon, f.title, f.description)
                                .padding(.bottom, 8)
                        }
                        if let post = v.post {
                            Link(destination: post) {
                                HStack {
                                    Text("Read more")
                                    Image(systemName: "arrow.up.right.circle")
                                }
                            }
                        }
                        if !viaSettings {
                            Spacer()
                            Button("Ok") {
                                dismiss()
                            }
                            .font(.title3)
                            .frame(maxWidth: .infinity, alignment: .center)
                            Spacer()
                        }
                    }
                    .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading)
                    .tag(i)
                }
            }
            .tabViewStyle(.page(indexDisplayMode: .never))
            Spacer()
            pagination()
        }
        .padding()
        .onChange(of: currentVersion) { _ in
            currentVersionNav = currentVersion
        }
    }

    private func featureDescription(_ icon: String, _ title: LocalizedStringKey, _ description: LocalizedStringKey) -> some View {
        VStack(alignment: .leading, spacing: 4) {
            HStack(alignment: .center, spacing: 4) {
                Image(systemName: icon)
                    .symbolRenderingMode(.monochrome)
                    .foregroundColor(.secondary)
                    .frame(minWidth: 30, alignment: .center)
                Text(title).font(.title3).bold()
            }
            Text(description)
                .multilineTextAlignment(.leading)
                .lineLimit(10)
        }
    }

    private func pagination() -> some View {
        HStack {
            if currentVersionNav > 0 {
                let prev = currentVersionNav - 1
                Button {
                    currentVersionNav = prev
                    withAnimation { currentVersion = prev }
                } label: {
                    HStack {
                        Image(systemName: "chevron.left")
                        Text(versionDescriptions[prev].version)
                    }
                }
            }
            Spacer()
            if currentVersionNav < versionDescriptions.count - 1 {
                let next = currentVersionNav + 1
                Button {
                    currentVersionNav = next
                    withAnimation { currentVersion = next }
                } label: {
                    HStack {
                        Text(versionDescriptions[next].version)
                        Image(systemName: "chevron.right")
                    }
                }
            }
        }
    }
}

struct NewFeaturesView_Previews: PreviewProvider {
    static var previews: some View {
        WhatsNewView()
    }
}