#!/usr/bin/env python3
"""Is theme-light.css the only place a colour exists? — C4, T9.9.

The token rule, finally enforceable everywhere: after this sweep no colour
literal survives outside theme-light.css - not in page stylesheets, not in the
help centre's injected styles (BL-004), not in the JS-built dialogs (BL-005),
not in the print popup. One accent blue (BL-008 - the second brand blue is
gone, .sop-inherited tints with THE blue) and one warning amber (BL-009 - the
alt token is deleted). Comments are stripped first: quoting a hex while
explaining it is not declaring one (the BL-017 lesson).

The exceptions, in full: <meta name="theme-color"> (a meta attribute cannot
resolve a CSS var), and rgba() shadow/overlay alphas, which are opacity
recipes, not palette entries.

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")


def strip_comments(src, is_css):
    src = re.sub(r"/\*.*?\*/", "", src, flags=re.S)
    if not is_css:
        src = "\n".join(re.sub(r"(?<![:'\"])//.*$", "", ln) for ln in src.split("\n"))
        src = re.sub(r"<!--.*?-->", "", src, flags=re.S)
    return src


def main():
    print("\n1. hex literals outside theme-light.css")
    offenders = []
    for name in sorted(os.listdir(HTML)):
        if not name.endswith((".js", ".html", ".css")) or name == "theme-light.css":
            continue
        src = strip_comments(io.open(os.path.join(HTML, name), encoding="utf-8").read(),
                             name.endswith(".css"))
        # the one exception: the browser-chrome hint, which cannot use var()
        src = re.sub(r'<meta name="theme-color" content="#[0-9a-fA-F]{6}"\s*/?>', "", src)
        for m in re.finditer(r"#[0-9a-fA-F]{3}\b|#[0-9a-fA-F]{6}\b", src):
            offenders.append("%s: %s" % (name, m.group(0)))
    chk("no hex colour literal outside theme-light.css; grep confirms",
        not offenders, offenders[:8])

    print("\n2. one blue, one amber")
    theme = io.open(os.path.join(HTML, "theme-light.css"), encoding="utf-8").read()
    code = strip_comments(theme, True)
    chk("the second brand blue (#2563d6) is gone from the theme itself",
        "2563d6" not in code and "37, 99, 214" not in code)
    chk("the ninth amber (--wp-status-warning-text-alt) is deleted",
        "--wp-status-warning-text-alt" not in code)
    others = []
    for name in sorted(os.listdir(HTML)):
        if name == "theme-light.css" or not name.endswith((".js", ".css", ".html")):
            continue
        src = strip_comments(io.open(os.path.join(HTML, name), encoding="utf-8").read(),
                             name.endswith(".css"))
        if "warning-text-alt" in src or "2563d6" in src:
            others.append(name)
    chk("...and no consumer still references either", not others, others)

    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())