#!/usr/bin/env bash

# A window that wants the whole output must ask for ExclusionMode.Ignore and
# nothing else. Quickshell's exclusiveZone setter forces exclusionMode back to
# Normal as a side effect, so a window declaring both
#
#     exclusiveZone: 0
#     exclusionMode: ExclusionMode.Ignore
#
# ends up with whichever property the QML engine applied last, and that order
# is not ours to control: the 2026-09-14 Qt/Quickshell update flipped it, every
# full-screen overlay slid down under the bar, and the screenshot picker's
# frozen frame stopped lining up with the screen it was a picture of. This pins
# the order-independent idiom: Ignore alone, never paired with exclusiveZone.

set -uo pipefail

repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
qs="$repo_dir/config/dot/quickshell"

fail() { printf 'exclusion idiom contract: %s\n' "$1" >&2; exit 1; }
[[ -d "$qs/modules" ]] || fail "missing $qs/modules"

python3 - "$qs" <<'PY'
import re, sys, pathlib
qs = pathlib.Path(sys.argv[1])
problems = []
ignore = re.compile(r'\bexclusionMode\s*:\s*ExclusionMode\.Ignore\b')
zone = re.compile(r'^\s*(?:WlrLayershell\.)?exclusiveZone\s*:', re.M)
checked = 0
for path in sorted(qs.rglob('*.qml')):
    text = path.read_text()
    if not ignore.search(text):
        continue
    checked += 1
    for m in zone.finditer(text):
        line = text.count('\n', 0, m.start()) + 1
        problems.append(f"{path.relative_to(qs)}:{line}: exclusiveZone set in a file that uses "
                        "ExclusionMode.Ignore; drop it, Ignore already means -1")
if checked == 0:
    problems.append("no window uses ExclusionMode.Ignore; the overlays this pins are gone")
if problems:
    print('\n'.join(problems), file=sys.stderr)
    sys.exit(1)
PY