#!/usr/bin/env python3
"""Compare two plan sheets layer-by-layer and list elevation-like numeric
texts (decimal values in 0..1000) per layer, to locate ground levels (지반고).
Read-only on the source DXF."""
import collections
import re
import sys

import ezdxf

num = re.compile(r"^-?\d{1,4}\.\d{1,3}$")


def scan(path):
    msp = ezdxf.readfile(path).modelspace()
    layers = collections.Counter(e.dxf.layer for e in msp)
    el = collections.defaultdict(list)
    for e in msp.query("TEXT"):
        s = e.dxf.text.strip()
        if num.match(s) and 0 <= float(s) <= 1000:
            el[e.dxf.layer].append((round(e.dxf.insert.x, 1), round(e.dxf.insert.y, 1), s))
    return layers, el

la, ea = scan(sys.argv[1])
lb, eb = scan(sys.argv[2])
print("layers only in 001:", sorted(set(la) - set(lb)))
print("layers only in 002:", sorted(set(lb) - set(la)))
for lay in sorted(set(la) | set(lb)):
    if la[lay] != lb[lay]:
        print(f"  count diff {lay}: 001={la[lay]} 002={lb[lay]}")
print("== elevation-like numeric texts (layer: n, sample)")
for name, el in (("001", ea), ("002", eb)):
    for lay, items in sorted(el.items(), key=lambda kv: -len(kv[1])):
        print(f"  {name} {lay}: n={len(items)} sample={sorted(items)[:6]}")