// App Store screenshot scenes — the actual screens we render, each wired with mock data so it
// looks populated without a live host. Every scene is built from the REAL app views (HomeView,
// SettingsView, PairSheet, TrustCardView) so the screenshots track the shipping UI; only the
// live stream is faked (StreamView needs a real punktfunk/1 connection — see ShotStreamHero).

#if DEBUG
import PunktfunkKit
import SwiftUI

/// One screen to capture: a name (→ file suffix), the canvas orientation, a color scheme, and a
/// factory that builds the populated view on the main actor.
struct ShotScene {
    let name: String
    let orientation: ShotOrientation
    let colorScheme: ColorScheme
    let make: @MainActor () -> AnyView
}

@MainActor
enum ShotScenes {
    static var all: [ShotScene] {
        var scenes: [ShotScene] = [
            ShotScene(name: "01-stream", orientation: .landscape, colorScheme: .dark) {
                AnyView(ShotStreamHero())
            },
            ShotScene(name: "02-hosts", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotHome())
            },
            ShotScene(name: "03-pair", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotPair())
            },
            ShotScene(name: "04-trust", orientation: .landscape, colorScheme: .dark) {
                AnyView(ShotTrust())
            },
            ShotScene(name: "05-settings", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotSettings())
            },
        ]
        #if os(iOS) || os(macOS)
        // The gamepad-mode console screens (no tvOS — native focus engine there). Dev-only shots
        // for eyeballing the Liquid Glass host tiles + settings rows.
        scenes += [
            ShotScene(name: "06-gamepad-home", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotGamepadHome())
            },
            ShotScene(name: "07-gamepad-settings", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotGamepadSettings())
            },
            ShotScene(name: "08-gamepad-addhost", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotGamepadAddHost())
            },
            ShotScene(name: "09-connecting", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotConnect(kind: .connecting))
            },
            ShotScene(name: "09b-waking", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotConnect(kind: .waking))
            },
            ShotScene(name: "09c-wake-timed-out", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotConnect(kind: .timedOut))
            },
            // The default-UI presentation (Liquid Glass modal over the touch grid) of the same phases.
            ShotScene(name: "09d-connecting-modal", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotConnect(kind: .connecting, gamepadUI: false))
            },
            ShotScene(name: "09e-waking-modal", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotConnect(kind: .waking, gamepadUI: false))
            },
            ShotScene(name: "09f-wake-timed-out-modal", orientation: .natural, colorScheme: .dark) {
                AnyView(ShotConnect(kind: .timedOut, gamepadUI: false))
            },
        ]
        #endif
        scenes.append(ShotScene(name: "10-edithost", orientation: .natural, colorScheme: .dark) {
            AnyView(ShotEditHost())
        })
        return scenes
    }
}

// MARK: - Mock data

@MainActor
enum ShotMock {
    // Stable ids so the store, the adverts and the profile bindings all point at the same things
    // across every scene and every run.
    static let battlestationID = UUID(uuidString: "5B0D1E00-0000-4000-8000-000000000001")!
    static let livingRoomID = UUID(uuidString: "5B0D1E00-0000-4000-8000-000000000002")!
    static let workshopID = UUID(uuidString: "5B0D1E00-0000-4000-8000-000000000003")!
    static let officeID = UUID(uuidString: "5B0D1E00-0000-4000-8000-000000000004")!
    static let editingID = UUID(uuidString: "5B0D1E00-0000-4000-8000-000000000005")!
    static let bedroomID = UUID(uuidString: "5B0D1E00-0000-4000-8000-000000000006")!

    static let hdrProfileID = "a71c4e0d9f22"
    static let couchProfileID = "3e88b107c4da"

    /// The catalog the host cards read their chips and pinned cards from. Seeded once, on the
    /// first store build — `ProfileStore` is a singleton, and in shot mode its write-back is
    /// suppressed, so this never reaches a real user's catalog.
    static func installProfiles() {
        guard !profilesInstalled else { return }
        profilesInstalled = true
        ProfileStore.shared.debugSet([
            StreamProfile(name: "4K HDR", id: hdrProfileID, accent: "#8B7BF7"),
            StreamProfile(name: "Couch 1080p", id: couchProfileID, accent: "#4FD1A5"),
        ])
    }

    private static var profilesInstalled = false

    /// A populated saved-host grid: the most-recent host bound to a profile (its chip), a second
    /// paired machine, and one asleep box we hold a MAC for (so its card offers Wake-on-LAN). OS
    /// chains give every tile its real vendor mark instead of a letter monogram.
    ///
    /// No PINNED host+profile card: it renders a second tile for the SAME host, which is the
    /// feature working as designed but reads as a duplicate to anyone meeting the app in a store
    /// listing. The binding chip carries the profile story on its own.
    static func hostStore() -> HostStore {
        installProfiles()
        let store = HostStore()
        store.hosts = [
            StoredHost(
                id: battlestationID, name: "Battlestation", address: "192.168.1.20", port: 9777,
                pinnedSHA256: fingerprint, lastConnected: Date().addingTimeInterval(-420),
                macAddresses: ["a4:b1:c2:d3:e4:f5"], profileID: hdrProfileID,
                osChain: "windows/11"),
            StoredHost(
                id: livingRoomID, name: "Living Room PC", address: "192.168.1.41", port: 9777,
                pinnedSHA256: hostFingerprint(1), lastConnected: Date().addingTimeInterval(-86_400),
                macAddresses: ["b8:27:eb:11:22:33"], osChain: "linux/fedora/bazzite"),
            StoredHost(
                id: officeID, name: "Office NUC", address: "192.168.1.33", port: 9777,
                pinnedSHA256: hostFingerprint(4), lastConnected: Date().addingTimeInterval(-259_200),
                profileID: couchProfileID, osChain: "linux/ubuntu"),
            StoredHost(
                id: workshopID, name: "Workshop", address: "10.0.0.7", port: 9777,
                pinnedSHA256: hostFingerprint(2), macAddresses: ["de:ad:be:ef:00:07"],
                osChain: "linux/arch"),
            StoredHost(
                id: editingID, name: "Editing Rig", address: "192.168.1.62", port: 9777,
                pinnedSHA256: hostFingerprint(5), lastConnected: Date().addingTimeInterval(-604_800),
                osChain: "linux/nobara"),
            StoredHost(
                id: bedroomID, name: "Bedroom Mini", address: "192.168.1.77", port: 9777,
                pinnedSHA256: hostFingerprint(6), macAddresses: ["00:1a:2b:3c:4d:5e"],
                osChain: "windows/11"),
        ]
        return store
    }

    /// Discovery, seeded rather than live. Two saved hosts advertise (so their cards read ONLINE
    /// through the real `advertises` path, and the reachability probe skips them — no network from
    /// a capture), "Workshop" stays quiet so the grid shows an asleep machine, and one genuinely
    /// new host populates the "On this network" section.
    ///
    /// A live browse made the shot non-deterministic AND leaked whatever was on the capturing
    /// machine's LAN into the App Store listing.
    static func discovery() -> HostDiscovery {
        let discovery = HostDiscovery()
        discovery.debugSet([
            HostDiscovery.debugAdvert(
                id: "battlestation", name: "Battlestation", host: "192.168.1.20",
                fingerprintHex: fingerprint.hexLower, macAddresses: ["a4:b1:c2:d3:e4:f5"],
                osChain: "windows/11"),
            HostDiscovery.debugAdvert(
                id: "living-room", name: "Living Room PC", host: "192.168.1.41",
                fingerprintHex: hostFingerprint(1).hexLower, macAddresses: ["b8:27:eb:11:22:33"],
                osChain: "linux/fedora/bazzite"),
            HostDiscovery.debugAdvert(
                id: "office-nuc", name: "Office NUC", host: "192.168.1.33",
                fingerprintHex: hostFingerprint(4).hexLower, osChain: "linux/ubuntu"),
            HostDiscovery.debugAdvert(
                id: "studio", name: "Studio PC", host: "192.168.1.58",
                fingerprintHex: hostFingerprint(3).hexLower, requiresPairing: true, allowsTofu: false,
                osChain: "windows/11"),
        ])
        return discovery
    }

    static let host = StoredHost(
        id: battlestationID, name: "Battlestation", address: "192.168.1.20", port: 9777,
        pinnedSHA256: fingerprint, osChain: "windows/11")

    /// What the pairing sheet calls THIS device. Taken from the platform, not from
    /// `UIDevice.current.name` — on a capture simulator that is the harness's own throwaway name
    /// (`pf-shot-iphone-6.9` went out on the store listing that way).
    static var clientDeviceName: String {
        #if os(tvOS)
        "Apple TV"
        #elseif os(macOS)
        "MacBook Pro"
        #else
        UIDevice.current.userInterfaceIdiom == .pad ? "iPad Pro" : "iPhone"
        #endif
    }

    /// A plausible-looking 32-byte SHA-256 for the trust card / pin lock glyphs.
    static let fingerprint = hostFingerprint(0)

    /// Distinct per host — `StoredHost.matches` prefers a fingerprint comparison, so sharing one
    /// across the mock grid made a single advert light up every card.
    static func hostFingerprint(_ seed: Int) -> Data {
        Data((0..<32).map { UInt8((($0 &* 37) &+ 0x1d &+ (seed &* 91)) & 0xff) })
    }
}

// MARK: - Home

private struct ShotHome: View {
    @StateObject private var store = ShotMock.hostStore()
    @StateObject private var model = SessionModel()
    @StateObject private var discovery = ShotMock.discovery()

    var body: some View {
        #if os(macOS)
        HomeView(
            store: store, model: model, discovery: discovery,
            showAddHost: .constant(false), pairingTarget: .constant(nil),
            speedTestTarget: .constant(nil), libraryTarget: .constant(nil),
            connect: { _, _ in }, connectDiscovered: { _ in },
            onPaired: { _, _ in }, onLaunchTitle: { _, _ in }, wake: { _ in })
        #else
        HomeView(
            store: store, model: model, discovery: discovery,
            showAddHost: .constant(false), pairingTarget: .constant(nil),
            speedTestTarget: .constant(nil), libraryTarget: .constant(nil),
            showSettings: .constant(false),
            connect: { _, _ in }, connectDiscovered: { _ in },
            onPaired: { _, _ in }, onLaunchTitle: { _, _ in }, wake: { _ in })
        #endif
    }
}

// MARK: - Gamepad-mode console screens (dev-only glass preview)

#if os(iOS) || os(macOS)
private struct ShotGamepadHome: View {
    @StateObject private var store = ShotMock.hostStore()
    @StateObject private var model = SessionModel()
    @StateObject private var discovery = ShotMock.discovery()
    @StateObject private var waker = HostWaker()

    var body: some View {
        GamepadHomeView(
            store: store, model: model, discovery: discovery,
            libraryTarget: .constant(nil), waker: waker,
            connect: { _, _ in }, connectDiscovered: { _ in })
    }
}

private struct ShotGamepadSettings: View {
    @StateObject private var store = ShotMock.hostStore()

    var body: some View { GamepadSettingsView(store: store) }
}

private struct ShotGamepadAddHost: View {
    var body: some View { GamepadAddHostView(onAdd: { _ in }) }
}

/// The unified connect overlay (the real `ConnectOverlay`) in each phase — instant "Connecting…"
/// feedback, the "Waking…" wait, and the wake-timed-out prompt. `gamepadUI` picks the presentation:
/// the console's full-screen aurora takeover over the gamepad home, or the default UI's Liquid Glass
/// modal over the touch host grid.
private struct ShotConnect: View {
    enum Kind { case connecting, waking, timedOut }
    let kind: Kind
    var gamepadUI = true

    @StateObject private var store = ShotMock.hostStore()
    @StateObject private var model = SessionModel()
    @StateObject private var discovery = ShotMock.discovery()
    @StateObject private var waker = HostWaker()

    var body: some View {
        backdrop
            .overlay {
                ConnectOverlay(
                    connectingHostName: kind == .connecting ? "Battlestation" : nil,
                    waker: waker,
                    gamepadUI: gamepadUI,
                    onCancelConnect: {})
            }
            .onAppear {
                switch kind {
                case .connecting:
                    break
                case .waking:
                    waker.debugSet(.init(
                        hostID: store.hosts.first?.id ?? UUID(),
                        hostName: "Battlestation", connectsAfter: true, seconds: 14))
                case .timedOut:
                    waker.debugSet(.init(
                        hostID: store.hosts.first?.id ?? UUID(),
                        hostName: "Battlestation", connectsAfter: true, seconds: 90, timedOut: true))
                }
            }
    }

    @ViewBuilder private var backdrop: some View {
        if gamepadUI {
            GamepadHomeView(
                store: store, model: model, discovery: discovery,
                libraryTarget: .constant(nil), waker: waker,
                connect: { _, _ in }, connectDiscovered: { _ in })
        } else {
            ShotHome()
        }
    }
}
#endif

// MARK: - Edit host (add/edit sheet with the Wake-on-LAN MAC field)

private struct ShotEditHost: View {
    var body: some View {
        ZStack {
            ShotHome().blur(radius: 24).overlay(Color.black.opacity(0.45))
            AddHostSheet(
                existing: StoredHost(
                    name: "Battlestation", address: "192.168.1.20", port: 9777,
                    pinnedSHA256: ShotMock.fingerprint, macAddresses: ["a4:b1:c2:d3:e4:f5"]),
                onSave: { _ in })
                #if os(macOS)
                .clipShape(RoundedRectangle(cornerRadius: 12))
                .shadow(radius: 40, y: 16)
                #endif
        }
    }
}

// MARK: - Settings

private struct ShotSettings: View {
    var body: some View {
        #if os(macOS)
        // The mac Settings window is a fixed-size tabbed panel — float it over a dimmed host
        // grid so the shot reads as the preferences window over the running app.
        ZStack {
            ShotHome().blur(radius: 24).overlay(Color.black.opacity(0.45))
            SettingsView()
                .fixedSize()
                .clipShape(RoundedRectangle(cornerRadius: 12))
                .shadow(radius: 40, y: 16)
        }
        #elseif os(iOS)
        // SettingsView owns its NavigationSplitView (sidebar + detail) and Done button, so it is
        // rendered directly — a wrapping NavigationStack would nest a split view in a stack. Open
        // on Display rather than the bare category list: resolution, frame rate, bitrate, HDR and
        // codec are what someone reads a streaming app's settings shot to find out.
        SettingsView(initialCategory: .display)
        #else
        NavigationStack { SettingsView() }
        #endif
    }
}

// MARK: - Pair (PIN ceremony)

private struct ShotPair: View {
    /// The PIN as the host's web console shows it, and a device name that doesn't depend on what
    /// the capture simulator happens to be called.
    private var sheet: some View {
        PairSheet(
            host: ShotMock.host, shotPIN: "418 306",
            shotClientName: ShotMock.clientDeviceName, onPaired: { _ in })
    }

    var body: some View {
        #if os(iOS)
        // PRESENT it, don't rebuild it. `PairSheet` is a bottom sheet on iOS — it carries its own
        // `.presentationDetents([.medium, .large])` and the system's Liquid Glass background, both
        // of which only exist inside a real `.sheet`. Composed into a ZStack instead (what this
        // scene used to do), the detents were inert, the grouped Form stretched to the full height
        // of the screen, and the capture was a thin strip of content over a huge black void.
        ShotHome()
            .sheet(isPresented: .constant(true)) {
                // Pinned to one detent. The sheet ships `[.medium, .large]` so it can grow over
                // the keyboard, and the resting height leaves a wide empty band between the form
                // and the button row; a capture wants the snug version.
                sheet.presentationDetents([.fraction(0.52)])
            }
        #elseif os(tvOS)
        // tvOS pushes the ceremony as a full screen (HomeView's `navigationDestination`).
        NavigationStack { sheet }
        #else
        // macOS: a fixed-width panel (`.frame(width: 400).fixedSize()`) that hugs its content, so
        // floating it over the dimmed grid matches how the window-modal sheet reads. `screencapture
        // -l<windowID>` grabs one window, and an AppKit sheet is a child window — a real `.sheet`
        // would fall outside the capture.
        ZStack {
            ShotHome().blur(radius: 28).overlay(Color.black.opacity(0.5))
            sheet
                .background(.regularMaterial, in: RoundedRectangle(cornerRadius: 18))
                .clipShape(RoundedRectangle(cornerRadius: 18))
                .shadow(radius: 40, y: 16)
        }
        #endif
    }
}

// MARK: - Trust (TOFU card over the blurred live stream)

private struct ShotTrust: View {
    var body: some View {
        ZStack {
            ShotDesktopFrame()
                .blur(radius: 32)
                .overlay(Color.black.opacity(0.45))
            TrustCardView(
                fingerprint: ShotMock.fingerprint, hostName: "Battlestation",
                onCancel: {}, onTrust: {}, onPairInstead: {})
        }
    }
}

// MARK: - Stream hero

/// The marketing hero: a stand-in streamed frame with the real glass HUD chip on top.
/// StreamView can't render here (it needs a live punktfunk/1 connection), so the frame is
/// synthetic — set `PUNKTFUNK_SHOT_HERO=/path/to/frame.png` to drop in a real captured frame.
private struct ShotStreamHero: View {
    var body: some View {
        ZStack(alignment: .topTrailing) {
            ShotDesktopFrame()
            ShotHUD()
        }
        .background(Color.black)
    }
}

/// A faithful copy of StreamHUDView's overlay (which needs a live PunktfunkConnection for the
/// mode line) with representative numbers, reusing the app's real `.glassBackground`.
private struct ShotHUD: View {
    var body: some View {
        VStack(alignment: .trailing, spacing: 4) {
            HStack(spacing: 6) {
                Circle().fill(Color.accentColor).frame(width: 7, height: 7)
                Text("5120×1440@240  240 fps  812.4 Mb/s")
                    .font(.system(.caption, design: .monospaced))
            }
            Text("end-to-end 2.9 ms p50 · 3.8 p95 · capture→on-glass")
                .font(.system(.caption2, design: .monospaced))
                .foregroundStyle(.secondary)
            Text("= host+network 1.3 + decode 0.7 + display 0.9")
                .font(.system(.caption2, design: .monospaced))
                .foregroundStyle(.secondary)
            #if os(macOS)
            Text("⌘⎋ releases the mouse")
                .font(.geist(11, relativeTo: .caption2)).foregroundStyle(.secondary)
            #elseif os(tvOS)
            Text("Press Menu to disconnect")
                .font(.geist(12, relativeTo: .caption)).foregroundStyle(.secondary)
            #endif
        }
        .padding(10)
        .glassBackground(RoundedRectangle(cornerRadius: 10))
        .padding(10)
    }
}

/// A synthetic "streamed frame" — a synthwave scene that reads as game content without shipping
/// any real art. Replaced wholesale when `PUNKTFUNK_SHOT_HERO` points at a real PNG.
private struct ShotDesktopFrame: View {
    var body: some View {
        if let image = Self.overrideImage {
            image.resizable().scaledToFill()
        } else {
            synthetic
        }
    }

    private var synthetic: some View {
        ZStack {
            LinearGradient(
                colors: [
                    Color(red: 0.05, green: 0.02, blue: 0.16),
                    Color(red: 0.35, green: 0.05, blue: 0.42),
                    Color(red: 0.95, green: 0.30, blue: 0.35),
                    Color(red: 0.99, green: 0.62, blue: 0.32),
                ],
                startPoint: .top, endPoint: .bottom)
            Canvas { ctx, size in
                let horizon = size.height * 0.52
                // Sun.
                let sunR = size.height * 0.20
                let sun = CGRect(x: size.width / 2 - sunR, y: horizon - sunR * 1.6,
                                 width: sunR * 2, height: sunR * 2)
                ctx.fill(Path(ellipseIn: sun),
                         with: .linearGradient(
                            Gradient(colors: [Color(red: 1, green: 0.95, blue: 0.5),
                                              Color(red: 1, green: 0.35, blue: 0.45)]),
                            startPoint: CGPoint(x: sun.midX, y: sun.minY),
                            endPoint: CGPoint(x: sun.midX, y: sun.maxY)))
                // Sun scanlines — clip a copy so the base context stays unclipped (GraphicsContext
                // is a value type; there is no resetClip).
                var sunCtx = ctx
                sunCtx.clip(to: Path(ellipseIn: sun))
                for i in 0..<7 {
                    let y = sun.minY + sun.height * (0.55 + Double(i) * 0.07)
                    let bar = CGRect(x: sun.minX, y: y, width: sun.width,
                                     height: sun.height * (0.012 + Double(i) * 0.006))
                    sunCtx.fill(Path(bar), with: .color(.black.opacity(0.85)))
                }
                // Perspective grid below the horizon.
                ctx.opacity = 0.55
                let cx = size.width / 2
                for col in -10...10 {
                    var p = Path()
                    p.move(to: CGPoint(x: cx, y: horizon))
                    p.addLine(to: CGPoint(x: cx + Double(col) * size.width * 0.11,
                                          y: size.height))
                    ctx.stroke(p, with: .color(Color(red: 0.6, green: 0.95, blue: 1)),
                               lineWidth: 1.5)
                }
                var row = horizon
                var step = size.height * 0.012
                while row < size.height {
                    var p = Path()
                    p.move(to: CGPoint(x: 0, y: row))
                    p.addLine(to: CGPoint(x: size.width, y: row))
                    ctx.stroke(p, with: .color(Color(red: 0.6, green: 0.95, blue: 1)),
                               lineWidth: 1.5)
                    step *= 1.32
                    row += step
                }
            }
        }
        .overlay(alignment: .bottomLeading) {
            // A small "now playing" chip so the frame reads as live content, not a wallpaper.
            HStack(spacing: 8) {
                Image(systemName: "gamecontroller.fill")
                Text("Streaming from Battlestation")
                    .font(.geist(16, .semibold, relativeTo: .callout))
            }
            .padding(.horizontal, 14).padding(.vertical, 9)
            .glassBackground(Capsule())
            .padding(18)
        }
        .ignoresSafeArea()
    }

    /// `PUNKTFUNK_SHOT_HERO=/abs/path.png` → use a real captured frame as the hero background.
    static var overrideImage: Image? {
        guard let path = ProcessInfo.processInfo.environment["PUNKTFUNK_SHOT_HERO"],
              !path.isEmpty, FileManager.default.fileExists(atPath: path) else { return nil }
        #if os(macOS)
        guard let ns = NSImage(contentsOfFile: path) else { return nil }
        return Image(nsImage: ns)
        #else
        guard let ui = UIImage(contentsOfFile: path) else { return nil }
        return Image(uiImage: ui)
        #endif
    }
}
#endif