"""
Fundamental Physical Constants
==============================

Define various constants from recommended values by the Committee on Data for
Science and Technology (CODATA).
"""

from colour.utilities.documentation import DocstringFloat, is_documentation_building

__author__ = "Colour Developers"
__copyright__ = "Copyright 2013 Colour Developers"
__license__ = "BSD-3-Clause - https://opensource.org/licenses/BSD-3-Clause"
__maintainer__ = "Colour Developers"
__email__ = "colour-developers@colour-science.org"
__status__ = "Production"

__all__ = [
    "CONSTANT_AVOGADRO",
    "CONSTANT_BOLTZMANN",
    "CONSTANT_LIGHT_SPEED",
    "CONSTANT_PLANCK",
]

CONSTANT_AVOGADRO: float = 6.02214179e23
if is_documentation_building():  # pragma: no cover
    CONSTANT_AVOGADRO = DocstringFloat(CONSTANT_AVOGADRO)
    CONSTANT_AVOGADRO.__doc__ = """
Avogadro constant.
"""

CONSTANT_BOLTZMANN: float = 1.38065e-23
if is_documentation_building():  # pragma: no cover
    CONSTANT_BOLTZMANN = DocstringFloat(CONSTANT_BOLTZMANN)
    CONSTANT_BOLTZMANN.__doc__ = """
Boltzmann constant.
"""

CONSTANT_LIGHT_SPEED: float = 299792458
if is_documentation_building():  # pragma: no cover
    CONSTANT_LIGHT_SPEED = DocstringFloat(CONSTANT_LIGHT_SPEED)
    CONSTANT_LIGHT_SPEED.__doc__ = """
Speed of light in vacuum.
"""

CONSTANT_PLANCK: float = 6.62607e-34
if is_documentation_building():  # pragma: no cover
    CONSTANT_PLANCK = DocstringFloat(CONSTANT_PLANCK)
    CONSTANT_PLANCK.__doc__ = """
Planck constant.
"""