"""Regenerate generated/nonprintable.rs from this interpreter's `str.isprintable`.

`repr(str)` escapes exactly the characters for which `str.isprintable()` is false, so the
table must come from the Python version the gateway interoperates with.

    python scripts/generate_nonprintable.py > generated/nonprintable.rs
"""

import sys
import unicodedata

ranges = []
start = None
for code in range(0x110000):
    printable = chr(code).isprintable()
    if not printable and start is None:
        start = code
    elif printable and start is not None:
        ranges.append((start, code - 1))
        start = None
if start is not None:
    ranges.append((start, 0x10FFFF))

lines = [
    f"// Generated by scripts/generate_nonprintable.py from Python {sys.version.split()[0]}",
    f"// (Unicode {unicodedata.unidata_version}). Do not edit by hand.",
    "",
    f'pub(crate) const UNICODE_VERSION: &str = "{unicodedata.unidata_version}";',
    "",
    "/// Inclusive code point ranges for which Python's `str.isprintable()` is false.",
    f"pub(crate) const NONPRINTABLE: [(u32, u32); {len(ranges)}] = [",
    *(f"    (0x{low:04X}, 0x{high:04X})," for low, high in ranges),
    "];",
]
sys.stdout.write("\n".join(lines) + "\n")