# Authors: The MNE-Python contributors.
# License: BSD-3-Clause
# Copyright the MNE-Python contributors.

from copy import deepcopy

DEFAULTS = dict(
    color=dict(
        mag="darkblue",
        grad="b",
        eeg="k",
        eog="k",
        ecg="m",
        emg="k",
        ref_meg="steelblue",
        misc="k",
        stim="k",
        resp="k",
        chpi="k",
        exci="k",
        ias="k",
        syst="k",
        seeg="saddlebrown",
        dbs="seagreen",
        dipole="k",
        gof="k",
        bio="k",
        ecog="k",
        hbo="#AA3377",
        hbr="b",
        fnirs_cw_amplitude="k",
        fnirs_fd_ac_amplitude="k",
        fnirs_fd_phase="k",
        fnirs_od="k",
        csd="k",
        whitened="k",
        gsr="#666633",
        temperature="#663333",
        eyegaze="k",
        pupil="k",
    ),
    si_units=dict(
        mag="T",
        grad="T/m",
        eeg="V",
        eog="V",
        ecg="V",
        emg="V",
        misc="AU",
        seeg="V",
        dbs="V",
        dipole="Am",
        gof="GOF",
        bio="V",
        ecog="V",
        hbo="M",
        hbr="M",
        ref_meg="T",
        fnirs_cw_amplitude="V",
        fnirs_fd_ac_amplitude="V",
        fnirs_fd_phase="rad",
        fnirs_od="V",
        csd="V/m²",
        whitened="Z",
        gsr="S",
        temperature="C",
        eyegaze="rad",
        pupil="m",
    ),
    units=dict(
        mag="fT",
        grad="fT/cm",
        eeg="µV",
        eog="µV",
        ecg="µV",
        emg="µV",
        misc="AU",
        seeg="mV",
        dbs="µV",
        dipole="nAm",
        gof="GOF",
        bio="µV",
        ecog="µV",
        hbo="µM",
        hbr="µM",
        ref_meg="fT",
        fnirs_cw_amplitude="V",
        fnirs_fd_ac_amplitude="V",
        fnirs_fd_phase="rad",
        fnirs_od="V",
        csd="mV/m²",
        whitened="Z",
        gsr="S",
        temperature="C",
        eyegaze="rad",
        pupil="µm",
    ),
    # scalings for the units
    scalings=dict(
        mag=1e15,
        grad=1e13,
        eeg=1e6,
        eog=1e6,
        emg=1e6,
        ecg=1e6,
        misc=1.0,
        seeg=1e3,
        dbs=1e6,
        ecog=1e6,
        dipole=1e9,
        gof=1.0,
        bio=1e6,
        hbo=1e6,
        hbr=1e6,
        ref_meg=1e15,
        fnirs_cw_amplitude=1.0,
        fnirs_fd_ac_amplitude=1.0,
        fnirs_fd_phase=1.0,
        fnirs_od=1.0,
        csd=1e3,
        whitened=1.0,
        gsr=1.0,
        temperature=1.0,
        eyegaze=1.0,
        pupil=1e6,
    ),
    # rough guess for a good plot
    scalings_plot_raw=dict(
        mag=1e-12,
        grad=4e-11,
        eeg=20e-6,
        eog=150e-6,
        ecg=5e-4,
        emg=1e-3,
        ref_meg=1e-12,
        misc="auto",
        stim=1,
        resp=1,
        chpi=1e-4,
        exci=1,
        ias=1,
        syst=1,
        seeg=1e-4,
        dbs=1e-4,
        bio=1e-6,
        ecog=1e-4,
        hbo=10e-6,
        hbr=10e-6,
        whitened=10.0,
        fnirs_cw_amplitude=2e-2,
        fnirs_fd_ac_amplitude=2e-2,
        fnirs_fd_phase=2e-1,
        fnirs_od=2e-2,
        csd=200e-4,
        dipole=1e-7,
        gof=1e2,
        gsr=1.0,
        temperature=0.1,
        eyegaze=2e-1,
        pupil=1e-2,
    ),
    scalings_cov_rank=dict(
        mag=1e12,
        grad=1e11,
        eeg=1e5,  # ~100x scalings
        seeg=1e1,
        dbs=1e4,
        ecog=1e4,
        hbo=1e4,
        hbr=1e4,
    ),
    ylim=dict(
        mag=(-600.0, 600.0),
        grad=(-200.0, 200.0),
        eeg=(-200.0, 200.0),
        misc=(-5.0, 5.0),
        seeg=(-20.0, 20.0),
        dbs=(-200.0, 200.0),
        dipole=(-100.0, 100.0),
        gof=(0.0, 1.0),
        bio=(-500.0, 500.0),
        ecog=(-200.0, 200.0),
        hbo=(0, 20),
        hbr=(0, 20),
        csd=(-50.0, 50.0),
        eyegaze=(-1, 1),
        pupil=(-1.0, 1.0),
    ),
    titles=dict(
        mag="Magnetometers",
        grad="Gradiometers",
        eeg="EEG",
        eog="EOG",
        ecg="ECG",
        emg="EMG",
        misc="misc",
        seeg="sEEG",
        dbs="DBS",
        bio="BIO",
        dipole="Dipole",
        ecog="ECoG",
        hbo="Oxyhemoglobin",
        ref_meg="Reference Magnetometers",
        fnirs_cw_amplitude="fNIRS (CW amplitude)",
        fnirs_fd_ac_amplitude="fNIRS (FD AC amplitude)",
        fnirs_fd_phase="fNIRS (FD phase)",
        fnirs_od="fNIRS (OD)",
        hbr="Deoxyhemoglobin",
        gof="Goodness of fit",
        csd="Current source density",
        stim="Stimulus",
        gsr="Galvanic skin response",
        temperature="Temperature",
        eyegaze="Eye-tracking (Gaze position)",
        pupil="Eye-tracking (Pupil size)",
        resp="Respiration monitoring channel",
        chpi="Continuous head position indicator (HPI) coil channels",
        exci="Flux excitation channel",
        ias="Internal Active Shielding data (Triux systems)",
        syst="System status channel information (Triux systems)",
        whitened="Whitened data",
    ),
    mask_params=dict(
        marker="o",
        markerfacecolor="w",
        markeredgecolor="k",
        linewidth=0,
        markeredgewidth=1,
        markersize=4,
    ),
    coreg=dict(
        mri_fid_opacity=1.0,
        dig_fid_opacity=1.0,
        # go from unit scaling (e.g., unit-radius sphere) to meters
        mri_fid_scale=5e-3,
        dig_fid_scale=8e-3,
        extra_scale=4e-3,
        eeg_scale=4e-3,
        eegp_scale=20e-3,
        eegp_height=0.1,
        ecog_scale=2e-3,
        seeg_scale=2e-3,
        meg_scale=1.0,  # sensors are already in SI units
        ref_meg_scale=1.0,
        dbs_scale=5e-3,
        fnirs_scale=5e-3,
        source_scale=5e-3,
        detector_scale=5e-3,
        hpi_scale=4e-3,
        head_color=(0.988, 0.89, 0.74),
        hpi_color=(1.0, 0.0, 1.0),
        extra_color=(1.0, 1.0, 1.0),
        meg_color=(0.0, 0.25, 0.5),
        ref_meg_color=(0.5, 0.5, 0.5),
        helmet_color=(0.0, 0.0, 0.6),
        eeg_color=(1.0, 0.596, 0.588),
        eegp_color=(0.839, 0.15, 0.16),
        ecog_color=(1.0, 1.0, 1.0),
        dbs_color=(0.82, 0.455, 0.659),
        seeg_color=(1.0, 1.0, 0.3),
        fnirs_color=(1.0, 0.647, 0.0),
        source_color=(1.0, 0.05, 0.0),
        detector_color=(0.3, 0.15, 0.15),
        lpa_color=(1.0, 0.0, 0.0),
        nasion_color=(0.0, 1.0, 0.0),
        rpa_color=(0.0, 0.0, 1.0),
    ),
    noise_std=dict(grad=5e-13, mag=20e-15, eeg=0.2e-6),
    eloreta_options=dict(eps=1e-6, max_iter=20, force_equal=False),
    depth_mne=dict(
        exp=0.8,
        limit=10.0,
        limit_depth_chs=True,
        combine_xyz="spectral",
        allow_fixed_depth=False,
    ),
    depth_sparse=dict(
        exp=0.8,
        limit=None,
        limit_depth_chs="whiten",
        combine_xyz="fro",
        allow_fixed_depth=True,
    ),
    interpolation_method=dict(
        eeg="spline", meg="MNE", fnirs="nearest", ecog="spline", seeg="spline"
    ),
    volume_options=dict(
        alpha=None,
        resolution=1.0,
        surface_alpha=None,
        blending="mip",
        silhouette_alpha=None,
        silhouette_linewidth=2.0,
    ),
    prefixes={
        "k": 1e-3,
        "h": 1e-2,
        "": 1e0,
        "d": 1e1,
        "c": 1e2,
        "m": 1e3,
        "µ": 1e6,
        "u": 1e6,
        "n": 1e9,
        "p": 1e12,
        "f": 1e15,
    },
    transform_zooms=dict(translation=None, rigid=None, affine=None, sdr=None),
    transform_niter=dict(
        translation=(10000, 1000, 100),
        rigid=(10000, 1000, 100),
        affine=(10000, 1000, 100),
        sdr=(10, 10, 5),
    ),
    volume_label_indices=(
        # Left and middle
        4,  # Left-Lateral-Ventricle
        5,  # Left-Inf-Lat-Vent
        8,  # Left-Cerebellum-Cortex
        10,  # Left-Thalamus-Proper
        11,  # Left-Caudate
        12,  # Left-Putamen
        13,  # Left-Pallidum
        14,  # 3rd-Ventricle
        15,  # 4th-Ventricle
        16,  # Brain-Stem
        17,  # Left-Hippocampus
        18,  # Left-Amygdala
        26,  # Left-Accumbens-area
        28,  # Left-VentralDC
        # Right
        43,  # Right-Lateral-Ventricle
        44,  # Right-Inf-Lat-Vent
        47,  # Right-Cerebellum-Cortex
        49,  # Right-Thalamus-Proper
        50,  # Right-Caudate
        51,  # Right-Putamen
        52,  # Right-Pallidum
        53,  # Right-Hippocampus
        54,  # Right-Amygdala
        58,  # Right-Accumbens-area
        60,  # Right-VentralDC
    ),
    report_stc_plot_kwargs=dict(
        views=("lateral", "medial"),
        hemi="split",
        backend="pyvistaqt",
        time_viewer=False,
        show_traces=False,
        size=(450, 450),
        background="white",
        time_label=None,
        add_data_kwargs={"colorbar_kwargs": {"label_font_size": 12, "n_labels": 5}},
    ),
)


def _handle_default(k, v=None):
    """Avoid dicts as default keyword arguments.

    Use this function instead to resolve default dict values. Example usage::

        scalings = _handle_default('scalings', scalings)

    """
    this_mapping = deepcopy(DEFAULTS[k])
    if v is not None:
        if isinstance(v, dict):
            this_mapping.update(v)
        else:
            for key in this_mapping:
                this_mapping[key] = v
    return this_mapping


HEAD_SIZE_DEFAULT = 0.095  # in [m]
_BORDER_DEFAULT = "mean"
_INTERPOLATION_DEFAULT = "cubic"
_EXTRAPOLATE_DEFAULT = "auto"