import math
from typing import List

from .charts_axis_axis_from_ticks import axis_line, check_orient
from .charts_axis_types import Axis, Line


def grid_lines(axis: Axis, length: float) -> List[Line]:
    """One gridline per tick, from the axis line across the plot."""
    check_orient(axis.orient)
    if isinstance(length, bool) or not isinstance(length, (int, float)) or not math.isfinite(length) or length < 0:
        raise ValueError("length must be a finite number of zero or more, received %r" % (length,))
    pos = axis.position
    out = []
    for t in axis.ticks:
        p = t.position
        if axis.orient == "bottom":
            out.append(axis_line(p, pos, p, pos - length))
        elif axis.orient == "top":
            out.append(axis_line(p, pos, p, pos + length))
        elif axis.orient == "left":
            out.append(axis_line(pos, p, pos + length, p))
        else:
            out.append(axis_line(pos, p, pos - length, p))
    return out