#!/usr/bin/env bash

set -euo pipefail

repo_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
sidebar="$repo_dir/config/dot/quickshell/modules/settings/SettingsSidebar.qml"

fail() {
    printf 'settings sidebar layout contract: %s\n' "$1" >&2
    exit 1
}

python3 - "$sidebar" <<'PY' || fail 'sidebar does not keep its header and footer pinned around one vertical scroll surface'
import re
import sys


text = open(sys.argv[1], encoding="utf-8").read()


def object_block(type_name: str, object_id: str) -> tuple[int, int, str]:
    pattern = re.compile(
        rf"\b{re.escape(type_name)}\s*\{{(?:(?!\n\s*[A-Za-z][A-Za-z0-9.]*\s*\{{).)*?"
        rf"\bid\s*:\s*{re.escape(object_id)}\b",
        re.S,
    )
    match = pattern.search(text)
    if not match:
        raise AssertionError(f"missing {type_name} id {object_id}")

    start = match.start()
    opening = text.index("{", start)
    depth = 0
    in_string = False
    escaped = False
    index = opening
    while index < len(text):
        character = text[index]
        if in_string:
            if escaped:
                escaped = False
            elif character == "\\":
                escaped = True
            elif character == '"':
                in_string = False
        elif character == '"':
            in_string = True
        elif character == "{":
            depth += 1
        elif character == "}":
            depth -= 1
            if depth == 0:
                return start, index + 1, text[start:index + 1]
        index += 1
    raise AssertionError(f"unterminated {type_name} id {object_id}")


try:
    header_start, header_end, header = object_block("Column", "sidebarHeader")
    scroll_start, scroll_end, scroll = object_block("Flickable", "sidebarScroll")
    footer_start, _, footer = object_block("Rectangle", "healthFooter")

    assert header_start < scroll_start < scroll_end < footer_start
    assert re.search(r"anchors\.top\s*:\s*parent\.top", header)
    assert re.search(r"\bid\s*:\s*searchInput\b", header)

    assert re.search(r"anchors\.top\s*:\s*sidebarHeader\.bottom", scroll)
    assert re.search(r"anchors\.bottom\s*:\s*healthFooter\.top", scroll)
    assert re.search(r"contentWidth\s*:\s*width", scroll)
    assert re.search(r"contentHeight\s*:\s*scrollContent\.implicitHeight", scroll)
    assert re.search(r"flickableDirection\s*:\s*Flickable\.VerticalFlick", scroll)
    assert re.search(r"boundsBehavior\s*:\s*Flickable\.StopAtBounds", scroll)
    assert re.search(r"clip\s*:\s*true", scroll)
    assert scroll.count("Flickable {") == 1

    assert re.search(r"\bid\s*:\s*scrollContent\b", scroll)
    assert re.search(r"\bid\s*:\s*searchResults\b", scroll)
    assert re.search(r"\bid\s*:\s*navigationList\b", scroll)
    assert re.search(r"visible\s*:\s*root\.query\s*!==\s*\"\"", scroll)
    assert re.search(r"visible\s*:\s*root\.query\s*===\s*\"\"", scroll)
    assert re.search(r"anchors\.bottom\s*:\s*parent\.bottom", footer)
except AssertionError as error:
    print(error, file=sys.stderr)
    raise SystemExit(1)
PY

printf 'settings sidebar layout contract: PASS\n'