feat(wip): add lgar init config model

python/ngen_conf/src/ngen/config/init_config/lgar.py

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+from pathlib import Path
+from typing import Literal, Optional, Union
+
+from ngen.init_config import serializer_deserializer
+from pydantic import Field
+
+from .utils import CSList, FloatUnitPair
+
+
+class Lgar(serializer_deserializer.IniSerializerDeserializer):
+    forcing_file: Optional[Path]
+    """
+    provides precipitation and PET inputs
+
+    only required if you are running in standalone mode (outside of NextGen).
+    """
+
+    soil_params_file: Path
+    """
+    provides soil types with van Genuchton parameters
+    """
+
+    # TODO: this can have units
+    layer_thickness: CSList[float]
+    """
+    individual layer thickness (not absolute)
+    Unit: cm
+    """
+
+    initial_psi: Union[float, FloatUnitPair[Literal["cm"]]]
+    """
+    >=0	cm	capillary head
+    used to initialize layers with a constant head
+    Unit: cm
+    """
+
+    ponded_depth_max: Union[float, FloatUnitPair[Literal["cm"]]]
+    """
+    >=0	cm	maximum surface ponding
+    the maximum amount of water unavailable for surface drainage, default is set to zero
+    Unit: cm
+    """
+
+    timestep: FloatUnitPair[Literal["s", "sec", "min", "minute", "h", "hr"]]
+    """
+    >0	sec/min/hr	temporal resolution
+    timestep of the model
+    Unit: "s", "sec", "min", "minute", "h", "hr"
+    """
+
+    forcing_resolution: FloatUnitPair[Literal["s", "sec", "min", "minute", "h", "hr"]]
+    """
+    sec/min/hr temporal resolution
+    timestep of the forcing data
+    Unit: "s", "sec", "min", "minute", "h", "hr"
+    """
+
+    endtime: FloatUnitPair[Literal["s", "sec", "min", "minute", "h", "hr", "d", "day"]]
+    """
+    >0 sec, min, hr, d	simulation duration
+    time at which model simulation ends
+    Unit: "s", "sec", "min", "minute", "h", "hr", "d", "day"
+    """
+
+    layer_soil_type: CSList[int]
+    """
+    layer soil type (read from the database file soil_params_file)
+    """
+
+    max_soil_types: int = Field(15, gt=1)
+    """
+    maximum number of soil types read from the file soil_params_file (default is set to 15)
+    """
+
+    wilting_point_psi: Union[float, FloatUnitPair[Literal["cm"]]]
+    """
+    wilting point (the amount of water not available for plants) used in computing AET
+    Unit: cm
+    """
+
+    use_closed_form_G: bool = False
+    """
+    determines whether the numeric integral or closed form for G is used; a value of true will use the closed form.
+    This defaults to false.
+    """
+
+    giuh_ordinates: CSList[float]
+    """
+    GIUH ordinates (for giuh based surface runoff)
+    """
+
+    verbosity: Literal["high", "low", "none"] = "none"
+    """
+    controls IO (screen outputs and writing to disk)
+    """
+
+    sft_coupled: bool
+    """
+    model coupling impacts hydraulic conductivity couples LASAM to SFT.
+    Coupling to SFT reduces hydraulic conducitivity, and hence infiltration, when soil is frozen.
+    """
+
+    # TODO: This can have units
+    soil_z: CSList[float]
+    """
+    vertical resolution of the soil column (computational domain of the SFT model)
+    Unit: cm
+    """
+
+    calib_params: bool = False
+    """
+    calibratable params flag
+    impacts soil properties	If set to true, soil smcmax, smcmin, vg_m, and vg_alpha are calibrated.
+    defualt is false.
+    vg = van Genuchten, SMC= soil moisture content
+    """
+
+    class Config(serializer_deserializer.IniSerializerDeserializer.Config):
+        no_section_headers: bool = True
+        # extra space is not accounted for
+        # https://github.com/NOAA-OWP/LGAR-C/blob/5aad0f501faba8cb53c6692787c96cba04489eaa/src/lgar.cxx#L190
+        space_around_delimiters: bool = False
+        field_type_serializers = {bool: lambda b: str(b).lower()}