tv-anarchy/Sources/TVAnarchyCore/Display/AudioOutputInfo.swift

import Foundation

/// One macOS audio output endpoint — the HDMI sink that pairs with an external
/// display, or the built-in speakers on the laptop.
public struct AudioOutputInfo: Identifiable, Sendable, Equatable, Codable {
    public var id: UInt32 { deviceId }
    /// CoreAudio `AudioDeviceID` — persisted as VLC's `auhal-audio-device`.
    public let deviceId: UInt32
    public let name: String
    public let isBuiltIn: Bool

    public init(deviceId: UInt32, name: String, isBuiltIn: Bool) {
        self.deviceId = deviceId
        self.name = name
        self.isBuiltIn = isBuiltIn
    }

    public var shortLabel: String {
        if isBuiltIn { return "Built-in Speakers" }
        return name.isEmpty ? "External Audio" : name
    }

    /// Heuristic: laptop speakers / built-in headphone jack vs HDMI/DisplayPort sinks.
    public static func inferBuiltIn(name: String) -> Bool {
        let n = name.lowercased()
        return n.contains("built-in") || n.hasSuffix("speakers")
    }

    /// Pick the audio sink that belongs with `display`. External displays are
    /// matched by name (e.g. SAMSUNG display → SAMSUNG HDMI); built-in falls back
    /// to the laptop speakers rather than the system-default output device.
    public static func pick(for display: DisplayInfo, from devices: [AudioOutputInfo]) -> AudioOutputInfo? {
        guard !devices.isEmpty else { return nil }
        if display.isBuiltIn {
            return devices.first(where: \.isBuiltIn) ?? devices.first
        }
        let dn = display.name.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
        if !dn.isEmpty {
            if let exact = devices.first(where: { $0.name.lowercased() == dn }) { return exact }
            if let partial = devices.first(where: {
                let n = $0.name.lowercased()
                return n.contains(dn) || dn.contains(n)
            }) { return partial }
        }
        return devices.first(where: { !$0.isBuiltIn }) ?? devices.first
    }
}