import Foundation
import CoreVideo

/// Signal Desktop adapter. Signal shows avatars/initials with a coloured ring
/// around the active speaker; names may also be available via the Electron
/// Accessibility tree (preferred over OCR when we enable it). Geometry/threshold
/// here are first-pass and will be calibrated against real Signal screenshots.
struct SignalAdapter: AppAdapter {
    static let bundleIDs = ["org.whispersystems.signal-desktop"]
    let adapterVersion = "signal-0.1.0"
    let preferredFPS = 3

    private let analyzer: GridCallAnalyzer

    init() {
        var config = GridCallAnalyzer.Config()
        // Signal tiles are squarish with initials centred; tune with fixtures.
        config.tileExpandX = 1.6
        config.tileExpandY = 1.8
        self.analyzer = GridCallAnalyzer(config: config)
    }

    func analyze(frame: CVPixelBuffer, at t: TimeInterval) -> [SpeakerObservation] {
        analyzer.analyze(pixelBuffer: frame, at: t)
    }

    // Exposed for fixture/synthetic tests.
    func analyze(cgImage: CGImage, at t: TimeInterval) -> [SpeakerObservation] {
        analyzer.analyze(cgImage: cgImage, at: t)
    }
}