"""Clean cutout boundary triangles and taper the split thickness profile."""

from .depth_surface import _math
from .nodes import evaluate_field, group_input, read_float_attribute, sample_field, store_float_attribute
from .smoothing import edge_boundary_field
from .boundary_smoothing import boundary_influence


def remove_boundary_triangles(group, geometry):
    """Remove all-boundary triangles once on the current topology."""
    nodes, links = group.nodes, group.links
    rim = evaluate_field(group, edge_boundary_field(nodes, links), "FLOAT", "POINT")
    all_boundary = _math(group, "GREATER_THAN", evaluate_field(group, rim, "FLOAT", "FACE"), 0.99999)
    count = nodes.new("GeometryNodeInputMeshFaceNeighbors").outputs["Vertex Count"]
    selected = _math(group, "MULTIPLY", all_boundary, _math(group, "COMPARE", count, 3))
    delete = nodes.new("GeometryNodeDeleteGeometry")
    delete.domain, delete.mode = "FACE", "ALL"
    links.new(geometry, delete.inputs["Geometry"])
    links.new(selected, delete.inputs["Selection"])
    return delete.outputs["Geometry"]


def taper_split_profile(group, original, geometry):
    """Taper balloon thickness through the shared two-ring influence builder."""
    nodes, links = group.nodes, group.links
    uv = nodes.new("GeometryNodeInputNamedAttribute")
    uv.data_type = "FLOAT_VECTOR"
    uv.inputs["Name"].default_value = "UVMap"
    original_uv = nodes.new("GeometryNodeSetPosition")
    links.new(original, original_uv.inputs["Geometry"])
    links.new(uv.outputs["Attribute"], original_uv.inputs["Position"])
    nearest = nodes.new("GeometryNodeSampleNearest")
    nearest.domain = "POINT"
    links.new(original_uv.outputs["Geometry"], nearest.inputs["Geometry"])
    links.new(uv.outputs["Attribute"], nearest.inputs["Sample Position"])
    rim = evaluate_field(group, edge_boundary_field(nodes, links), "FLOAT", "POINT")
    protected = sample_field(group, original, rim, "FLOAT", index=nearest.outputs["Index"])
    influence = boundary_influence(group, protected)
    controls = group_input(nodes, {"Edge Round", "Split Threshold"})
    strength = _math(group, "ADD", 1, _math(group, "MULTIPLY", controls.outputs["Edge Round"], 4))
    band = _math(group, "MINIMUM", _math(group, "MULTIPLY", influence, strength), 1)
    band = _math(group, "MULTIPLY", band, _math(group, "GREATER_THAN", controls.outputs["Split Threshold"], 0))
    retained = _math(group, "SQRT", _math(group, "MAXIMUM", _math(group, "SUBTRACT", 1, band), 0))
    profile = _math(group, "MULTIPLY", read_float_attribute(group, "o_balloon"), retained)
    return store_float_attribute(group, geometry, "o_balloon", profile)