"""
Stegasoo - Secure Steganography with Multi-Factor Authentication (v4.0.1)

Changes in v4.0.0:
- Added channel key support for deployment/group isolation
- New functions: get_channel_key, get_channel_fingerprint, generate_channel_key, etc.
- encode() and decode() now accept channel_key parameter
"""

__version__ = "4.3.0"

# Core functionality
# Channel key management (v4.0.0)
from .channel import (
    clear_channel_key,
    format_channel_key,
    generate_channel_key,
    get_channel_key,
    get_channel_status,
    has_channel_key,
    set_channel_key,
    validate_channel_key,
)

# Audio support — gated by STEGASOO_AUDIO env var and dependency availability
from .constants import AUDIO_ENABLED, VIDEO_ENABLED

# Crypto functions
from .crypto import get_active_channel_key, get_channel_fingerprint, has_argon2
from .decode import decode, decode_file, decode_text
from .encode import encode

# Credential generation
from .generate import (
    export_rsa_key_pem,
    generate_credentials,
    generate_passphrase,
    generate_pin,
    generate_rsa_key,
    load_rsa_key,
)

# Image utilities
from .image_utils import (
    compare_capacity,
    get_image_info,
)

# Backend registry
from .backends import EmbeddingBackend, registry as backend_registry

# Platform presets
from .platform_presets import PLATFORMS, get_preset

# Steganalysis
from .steganalysis import check_image
from .backends.registry import BackendNotFoundError

# Steganography functions
from .steganography import (
    calculate_capacity_by_mode,
    compare_modes,
    has_dct_support,
    will_fit_by_mode,
)

# Utilities
from .utils import generate_filename

HAS_AUDIO_SUPPORT = AUDIO_ENABLED
HAS_VIDEO_SUPPORT = VIDEO_ENABLED

if AUDIO_ENABLED:
    from .audio_utils import (
        detect_audio_format,
        get_audio_info,
        has_ffmpeg_support,
        validate_audio,
    )
    from .decode import decode_audio
    from .encode import encode_audio
else:
    detect_audio_format = None
    get_audio_info = None
    has_ffmpeg_support = None
    validate_audio = None
    encode_audio = None
    decode_audio = None

# Video support — gated by STEGASOO_VIDEO env var and ffmpeg + audio deps
if VIDEO_ENABLED:
    from .decode import decode_video
    from .encode import encode_video
    from .video_utils import (
        calculate_video_capacity,
        detect_video_format,
        get_video_info,
        validate_video,
    )
else:
    detect_video_format = None
    get_video_info = None
    validate_video = None
    calculate_video_capacity = None
    encode_video = None
    decode_video = None

# QR Code utilities - optional, may not be available
try:
    from .qr_utils import (
        detect_and_crop_qr,
        extract_key_from_qr,
        generate_qr_code,
    )

    HAS_QR_UTILS = True
except ImportError:
    HAS_QR_UTILS = False
    generate_qr_code = None
    extract_key_from_qr = None
    detect_and_crop_qr = None

# Validation
from .validation import (
    validate_file_payload,
    validate_image,
    validate_message,
    validate_passphrase,
    validate_pin,
    validate_rsa_key,
    validate_security_factors,
)

# Validation aliases for public API
validate_reference_photo = validate_image
validate_carrier = validate_image

# Additional validators
# Constants
from .constants import (
    DEFAULT_PASSPHRASE_WORDS,
    EMBED_MODE_AUDIO_AUTO,
    EMBED_MODE_AUDIO_LSB,
    EMBED_MODE_AUDIO_SPREAD,
    EMBED_MODE_AUTO,
    EMBED_MODE_DCT,
    EMBED_MODE_LSB,
    EMBED_MODE_VIDEO_AUTO,
    EMBED_MODE_VIDEO_LSB,
    FORMAT_VERSION,
    LOSSLESS_FORMATS,
    MAX_FILE_PAYLOAD_SIZE,
    MAX_IMAGE_PIXELS,
    MAX_MESSAGE_SIZE,
    MAX_PASSPHRASE_WORDS,
    MAX_PIN_LENGTH,
    MIN_IMAGE_PIXELS,
    MIN_PASSPHRASE_WORDS,
    MIN_PIN_LENGTH,
    RECOMMENDED_PASSPHRASE_WORDS,
)

# Exceptions
from .exceptions import (
    AudioCapacityError,
    AudioError,
    AudioExtractionError,
    AudioTranscodeError,
    AudioValidationError,
    CapacityError,
    CryptoError,
    DecryptionError,
    EmbeddingError,
    EncryptionError,
    ExtractionError,
    ImageValidationError,
    InvalidHeaderError,
    InvalidMagicBytesError,
    KeyDerivationError,
    KeyGenerationError,
    KeyPasswordError,
    KeyValidationError,
    MessageValidationError,
    ModeMismatchError,
    NoDataFoundError,
    PinValidationError,
    ReedSolomonError,
    SecurityFactorError,
    SteganographyError,
    StegasooError,
    UnsupportedAudioFormatError,
    UnsupportedVideoFormatError,
    ValidationError,
    VideoCapacityError,
    VideoError,
    VideoExtractionError,
    VideoTranscodeError,
    VideoValidationError,
)

# Models
from .models import (
    AudioCapacityInfo,
    AudioEmbedStats,
    AudioInfo,
    CapacityComparison,
    Credentials,
    DecodeResult,
    EncodeResult,
    FilePayload,
    GenerateResult,
    ImageInfo,
    ValidationResult,
    VideoCapacityInfo,
    VideoEmbedStats,
    VideoInfo,
)
from .validation import (
    validate_audio_embed_mode,
    validate_audio_file,
    validate_dct_color_mode,
    validate_dct_output_format,
    validate_embed_mode,
)

# Aliases for backward compatibility
MIN_MESSAGE_LENGTH = 1
MAX_MESSAGE_LENGTH = MAX_MESSAGE_SIZE
MAX_PAYLOAD_SIZE = MAX_MESSAGE_SIZE
# MAX_FILE_PAYLOAD_SIZE imported from constants above
SUPPORTED_IMAGE_FORMATS = LOSSLESS_FORMATS
LSB_BYTES_PER_PIXEL = 3 / 8
DCT_BYTES_PER_PIXEL = 0.125

__all__ = [
    # Version
    "__version__",
    # Core
    "encode",
    "decode",
    "decode_file",
    "decode_text",
    # Audio (v4.3.0)
    "encode_audio",
    "decode_audio",
    "detect_audio_format",
    "get_audio_info",
    "has_ffmpeg_support",
    "validate_audio",
    "HAS_AUDIO_SUPPORT",
    "HAS_VIDEO_SUPPORT",
    "validate_audio_embed_mode",
    "validate_audio_file",
    # Video (v4.4.0)
    "encode_video",
    "decode_video",
    "detect_video_format",
    "get_video_info",
    "validate_video",
    "calculate_video_capacity",
    # Generation
    "generate_pin",
    "generate_passphrase",
    "generate_rsa_key",
    "generate_credentials",
    "export_rsa_key_pem",
    "load_rsa_key",
    # Channel key management (v4.0.0)
    "generate_channel_key",
    "get_channel_key",
    "set_channel_key",
    "clear_channel_key",
    "has_channel_key",
    "get_channel_status",
    "validate_channel_key",
    "format_channel_key",
    "get_active_channel_key",
    "get_channel_fingerprint",
    # Image utilities
    "get_image_info",
    "compare_capacity",
    # Utilities
    "generate_filename",
    # Crypto
    "has_argon2",
    # Backends
    "EmbeddingBackend",
    "backend_registry",
    "BackendNotFoundError",
    # Platform presets
    "get_preset",
    "PLATFORMS",
    # Steganalysis
    "check_image",
    # Steganography
    "has_dct_support",
    "calculate_capacity_by_mode",
    "compare_modes",
    "will_fit_by_mode",
    # QR utilities
    "generate_qr_code",
    "extract_key_from_qr",
    "detect_and_crop_qr",
    "HAS_QR_UTILS",
    # Validation
    "validate_reference_photo",
    "validate_carrier",
    "validate_message",
    "validate_file_payload",
    "validate_passphrase",
    "validate_pin",
    "validate_rsa_key",
    "validate_security_factors",
    "validate_embed_mode",
    "validate_dct_output_format",
    "validate_dct_color_mode",
    "validate_channel_key",
    # Models
    "ImageInfo",
    "CapacityComparison",
    "GenerateResult",
    "EncodeResult",
    "DecodeResult",
    "FilePayload",
    "Credentials",
    "ValidationResult",
    # Audio models
    "AudioEmbedStats",
    "AudioInfo",
    "AudioCapacityInfo",
    # Video models
    "VideoEmbedStats",
    "VideoInfo",
    "VideoCapacityInfo",
    # Exceptions
    "StegasooError",
    "ValidationError",
    "PinValidationError",
    "MessageValidationError",
    "ImageValidationError",
    "KeyValidationError",
    "SecurityFactorError",
    "CryptoError",
    "EncryptionError",
    "DecryptionError",
    "KeyDerivationError",
    "KeyGenerationError",
    "KeyPasswordError",
    "SteganographyError",
    "CapacityError",
    "ExtractionError",
    "EmbeddingError",
    "InvalidHeaderError",
    "InvalidMagicBytesError",
    "ReedSolomonError",
    "NoDataFoundError",
    "ModeMismatchError",
    # Audio exceptions
    "AudioError",
    "AudioValidationError",
    "AudioCapacityError",
    "AudioExtractionError",
    "AudioTranscodeError",
    "UnsupportedAudioFormatError",
    # Video exceptions
    "VideoError",
    "VideoValidationError",
    "VideoCapacityError",
    "VideoExtractionError",
    "VideoTranscodeError",
    "UnsupportedVideoFormatError",
    # Constants
    "FORMAT_VERSION",
    "MIN_PASSPHRASE_WORDS",
    "RECOMMENDED_PASSPHRASE_WORDS",
    "DEFAULT_PASSPHRASE_WORDS",
    "MAX_PASSPHRASE_WORDS",
    "MIN_PIN_LENGTH",
    "MAX_PIN_LENGTH",
    "MIN_MESSAGE_LENGTH",
    "MAX_MESSAGE_LENGTH",
    "MAX_MESSAGE_SIZE",
    "MAX_PAYLOAD_SIZE",
    "MAX_FILE_PAYLOAD_SIZE",
    "MIN_IMAGE_PIXELS",
    "MAX_IMAGE_PIXELS",
    "SUPPORTED_IMAGE_FORMATS",
    "LOSSLESS_FORMATS",
    "LSB_BYTES_PER_PIXEL",
    "DCT_BYTES_PER_PIXEL",
    "EMBED_MODE_LSB",
    "EMBED_MODE_DCT",
    "EMBED_MODE_AUTO",
    # Audio constants
    "EMBED_MODE_AUDIO_LSB",
    "EMBED_MODE_AUDIO_SPREAD",
    "EMBED_MODE_AUDIO_AUTO",
    # Video constants
    "EMBED_MODE_VIDEO_LSB",
    "EMBED_MODE_VIDEO_AUTO",
]