#!/usr/bin/env python3
"""Is there one icon system, with one meaning per glyph? — S6, T9.3.

The set mixed emoji and dingbats, and at least one glyph carried two meanings.
Now: monochrome text-presentation glyphs only, mapped one-to-one in
docs/reference/tokens.md. Emoji render as per-platform colour artwork - which
is WHY the same glyph read as two things - so the enforceable form of "renders
identically on Windows, macOS and a tablet" is: no emoji-range codepoint and
no U+FE0F emoji-presentation selector anywhere in the UI source.

Static sweep - no browser needed. Exit 0 all passed, 1 a failure.
"""
import io
import os
import re
import sys

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
from browser_check import chk, _PASS, _FAIL                          # noqa: E402

ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
HTML = os.path.join(ROOT, "html")

# The approved system, verbatim from docs/reference/tokens.md.
APPROVED = {
    0x2713, 0x2715, 0x26A0, 0x2298, 0x270E, 0x21BA, 0x21BB, 0x2699,
    0x2913, 0x2912, 0x25C6, 0x25B8, 0x24D8, 0x2190, 0x2039, 0x203A,
    0x2192, 0x2193, 0x25D4, 0x25A4, 0x25A6, 0x25A7, 0x283F, 0x25BE,
    0x2248, 0x2398, 0x29C9, 0x2022, 0x00B7, 0x2298,
    0x2302, 0x2315, 0x2399, 0x23FB, 0x25B2, 0x25BC, 0x25C9, 0x25F7,
    0x2630, 0x263A, 0x2692, 0x26BF,
}
# Emoji territory: anything here in UI source is a system violation.
def is_emoji(o):
    return (0x1F000 <= o <= 0x1FAFF) or o in (0x2705, 0x274C, 0x26D4, 0x2B50,
                                              0x26A1, 0xFE0F, 0x2757, 0x2B55)


def main():
    print("\n1. no emoji, anywhere in the UI")
    offenders = []
    glyphs_seen = set()
    for name in sorted(os.listdir(HTML)):
        if not name.endswith((".html", ".js")):
            continue
        src = io.open(os.path.join(HTML, name), encoding="utf-8").read()
        for ch in set(src):
            o = ord(ch)
            if is_emoji(o):
                offenders.append((name, "U+%04X" % o))
            if o > 0x2000 and o not in (0x2013, 0x2014, 0x2018, 0x2019,
                                        0x201C, 0x201D, 0x2026):
                glyphs_seen.add(o)
    chk("no emoji-range codepoint and no U+FE0F selector survives in any page",
        not offenders, offenders[:8])

    print("\n2. the mapping document")
    tokens = io.open(os.path.join(ROOT, "docs", "reference", "tokens.md"),
                     encoding="utf-8").read()
    chk("the meaning-to-icon mapping is documented in tokens.md",
        "## Icons (S6 / T9.3)" in tokens and "U+2713" in tokens and "U+2298" in tokens)
    body = tokens[tokens.find("## Icons"):]
    rows = re.findall(r"^\| ([^|]+) \| [^|]+ \| (U\+[0-9A-F]{4}[^|]*) \|", body, re.M)
    meanings = [r[0].strip() for r in rows]
    chk("no meaning appears twice in the mapping", len(meanings) == len(set(meanings)),
        [m for m in meanings if meanings.count(m) > 1])
    codes = []
    for _, cp in rows:
        codes.extend(re.findall(r"U\+([0-9A-F]{4})", cp))
    chk("no glyph carries two meanings", len(codes) == len(set(codes)),
        [c for c in codes if codes.count(c) > 1])

    print("\n3. what the pages use is what the document names")
    # Box-drawing comment art (U+2500-257F) and the A7 locale samples in
    # wp-format.js are not icons; everything else above U+2200 must be mapped.
    unmapped = sorted("U+%04X" % o for o in glyphs_seen
                      if o >= 0x2200 and o not in APPROVED
                      and not (0x2500 <= o <= 0x257F)
                      and not (0x4E00 <= o <= 0xD7FF))   # CJK/Hangul: A7 locale data
    chk("every glyph in use above the punctuation range is in the approved set",
        not unmapped, unmapped[:10])

    print("\n" + "-" * 54)
    print("%d/%d checks passed." % (len(_PASS), len(_PASS) + len(_FAIL)))
    for f in _FAIL:
        print("  - " + f)
    return 1 if _FAIL else 0


if __name__ == "__main__":
    sys.exit(main())