// Regression contract for preserving codec settings across upgrades.
//
// Scope: keep safe HEVC/MJPEG ingress selection and MJPEG UVC output defaults
// explicit, while still allowing operator-provided install overrides.
// Targets: server/client install scripts and client camera capture defaults.
// Why: Lesavka now supports both MJPEG and HEVC upstream media, and installer
// reruns may prefer HEVC when decode is proven, falling back to either a
// smoke-tested software HEVC decoder or MJPEG instead of producing black frames.

const SERVER_INSTALL: &str = include_str!(concat!(
    env!("CARGO_MANIFEST_DIR"),
    "/scripts/install/server.sh"
));
const CLIENT_CAMERA: &str = include_str!(concat!(
    env!("CARGO_MANIFEST_DIR"),
    "/client/src/input/camera/capture_pipeline.rs"
));

#[test]
fn server_install_defaults_to_hevc_ingress_with_mjpeg_fallback_and_mjpeg_uvc_output() {
    for marker in [
        "PERSISTED_UVC_CODEC=$(persisted_uvc_value LESAVKA_UVC_CODEC || true)",
        "normalize_uvc_codec()",
        "normalize_cam_codec()",
        "REQUESTED_UVC_CODEC=${LESAVKA_INSTALL_UVC_CODEC:-${PERSISTED_UVC_CODEC:-mjpeg}}",
        "INSTALL_UVC_CODEC=$(normalize_uvc_codec \"$REQUESTED_UVC_CODEC\")",
        "REQUESTED_CAM_CODEC=${LESAVKA_INSTALL_CAM_CODEC:-${LESAVKA_CAM_CODEC:-hevc}}",
        "INSTALL_CAM_CODEC=$(normalize_cam_codec \"${REQUESTED_CAM_CODEC}\")",
        "INSTALL_CAM_CODEC_EXPLICIT=0",
        "INSTALL_HEVC_DECODER=${LESAVKA_INSTALL_HEVC_DECODER:-${LESAVKA_HEVC_DECODER:-}}",
        "INSTALL_ALLOW_SOFTWARE_VIDEO=${LESAVKA_INSTALL_ALLOW_SOFTWARE_VIDEO:-${LESAVKA_ALLOW_SOFTWARE_VIDEO:-0}}",
        "Software HEVC decoder passed the same 1280x720 smoke",
        "Default HEVC upstream cannot be proven on this host; falling back to MJPEG ingress.",
        "printf 'LESAVKA_CAM_CODEC=%s\\n' \"${INSTALL_CAM_CODEC}\"",
        "printf 'LESAVKA_HEVC_DECODER=%s\\n' \"$INSTALL_HEVC_DECODER\"",
        "printf 'LESAVKA_ALLOW_SOFTWARE_VIDEO=%s\\n' \"${INSTALL_ALLOW_SOFTWARE_VIDEO}\"",
        "printf 'LESAVKA_UVC_CODEC=%s\\n' \"${INSTALL_UVC_CODEC}\"",
        "\"LESAVKA_UVC_CODEC=${INSTALL_UVC_CODEC}\"",
        "uvc_env_value LESAVKA_UVC_WIDTH 1280",
    ] {
        assert!(
            SERVER_INSTALL.contains(marker),
            "server installer should preserve codec marker {marker}"
        );
    }
}

#[test]
fn server_install_does_not_let_ambient_uvc_codec_override_persisted_default() {
    assert!(
        !SERVER_INSTALL.contains("LESAVKA_UVC_CODEC=${LESAVKA_UVC_CODEC:-mjpeg}"),
        "ambient runtime UVC codec should not leak into install defaults"
    );
    assert!(
        SERVER_INSTALL.contains("LESAVKA_INSTALL_UVC_CODEC"),
        "operator install override should remain available"
    );
    assert!(
        SERVER_INSTALL
            .contains("UVC gadget output codec '${REQUESTED_UVC_CODEC}' is not supported"),
        "unsupported host-facing UVC codecs should be downgraded loudly instead of creating a stale YUYV descriptor"
    );
}

#[test]
fn client_camera_can_emit_hevc_or_mjpeg_from_live_capture() {
    for marker in [
        "LESAVKA_CAM_CODEC",
        "CameraCodec::Hevc",
        "CameraCodec::Mjpeg",
        "choose_hevc_encoder",
        "hevc_keyframe_interval",
        "image/jpeg",
        "video/x-h265",
    ] {
        assert!(
            CLIENT_CAMERA.contains(marker),
            "client camera pipeline should preserve codec marker {marker}"
        );
    }
}

#[test]
fn hevc_prerequisites_are_rechecked_idempotently() {
    for marker in [
        "ensure_hevc_decode_support",
        "pacman -Sq --needed --noconfirm",
        "modprobe rpi_hevc_dec",
        "/etc/modules-load.d/lesavka-hevc.conf",
        "gst-inspect-1.0 v4l2slh265dec",
        "avdec_h265 libde265dec",
        "Keeping default HEVC upstream to avoid direct-MJPEG UVC artifacts",
        "Refusing HEVC upstream install because production video decode must be hardware-accelerated and proven",
    ] {
        assert!(
            SERVER_INSTALL.contains(marker),
            "HEVC prerequisite path should preserve marker {marker}"
        );
    }
}