#!/usr/bin/env bash

set -euo pipefail

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

project_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
page="$project_root/config/dot/quickshell/modules/settings/ApplicationsPage.qml"

[[ -f "$page" ]] || fail 'Applications page is missing'

assert_contains() {
    rg -F --quiet "$1" "$page" || fail "page is missing: $1"
}

assert_contains 'SettingsPage {'
assert_contains 'objectName: "applications"'
assert_contains 'DesktopEntries.applications.values'
assert_contains 'DefaultApps'
assert_contains 'SettingsCard {'
assert_contains 'SettingRow {'
assert_contains 'activatable:'
assert_contains 'ActionRow {'
assert_contains 'TextRow {'

for label in Browser Mail Files Terminal Music Images Video; do
    assert_contains "label: \"$label\""
done

assert_contains 'title: "Default applications"'
assert_contains 'title: "User autostart"'
assert_contains 'title: "Compositor autostart"'
assert_contains 'AutostartAppPicker {'
assert_contains 'DefaultApps.addAutostart('
assert_contains 'label: "Add an application"'
assert_contains 'categories'
assert_contains 'genericName'
assert_contains '.sort('
assert_contains 'currentEntry'
assert_contains 'read-only'
assert_contains 'choices.push(currentEntry)'
assert_contains 'label: "Application settings need attention"'
assert_contains 'DefaultApps.busy ? "Loading…"'
assert_contains 'visible: !DefaultApps.busy && DefaultApps.autostartEntries.length === 0'
assert_contains 'visible: !DefaultApps.busy && DefaultApps.luaAutostartEntries.length === 0'

PAGE_PATH="$page" bun -e '
const source = await Bun.file(process.env.PAGE_PATH).text();
const rolesSource = source.match(/readonly property var roles:\s*(\[[\s\S]*?\n    \])/);
const matcherSource = source.match(/function matchesRole\(entry: var, role: var\): bool \{([\s\S]*?)\n    \}/);
if (!rolesSource || !matcherSource) {
    console.error("applications settings contract: role matcher could not be loaded");
    process.exit(1);
}

const roles = Function(`return (${rolesSource[1]})`)();
const matchesRole = Function("entry", "role", matcherSource[1]);
const role = key => roles.find(candidate => candidate.key === key);
const fixtures = [
    {
        name: "AudioVideo does not imply music",
        entry: { name: "Kodi", genericName: "Media Center", comment: "Entertainment hub", categories: "AudioVideo;Player;" },
        role: "music",
        expected: false
    },
    {
        name: "Graphics does not imply image handler",
        entry: { name: "Document Scanner", genericName: "Document Scanner", comment: "Scan documents", categories: ["Graphics"] },
        role: "images",
        expected: false
    },
    {
        name: "Viewer does not imply image handler",
        entry: { name: "Papers", genericName: "Document Viewer", comment: "Read documents", categories: "Office;Viewer;" },
        role: "images",
        expected: false
    },
    {
        name: "comment does not nominate a default handler",
        entry: { name: "Settings", genericName: "System Settings", comment: "Configure your video player", categories: ["System"] },
        role: "video",
        expected: false
    },
    {
        name: "exact audio player categories match music",
        entry: { name: "Rhythmbox", genericName: "Music Player", comment: "Play music", categories: "AudioVideo;Audio;Player;" },
        role: "music",
        expected: true
    },
    {
        name: "exact video category matches video",
        entry: { name: "Videos", genericName: "Video Player", comment: "Play movies", categories: ["AudioVideo", "Video", "Player"] },
        role: "video",
        expected: true
    },
    {
        name: "descriptive metadata matches image handler",
        entry: { name: "Loupe", genericName: "Image Viewer", comment: "Browse pictures", categories: "Graphics;Viewer;" },
        role: "images",
        expected: true
    }
];

for (const fixture of fixtures) {
    const actual = matchesRole(fixture.entry, role(fixture.role));
    if (actual !== fixture.expected) {
        console.error(`applications settings contract: ${fixture.name}: expected ${fixture.expected}, got ${actual}`);
        process.exit(1);
    }
}
'

if rg --quiet 'Component\.onCompleted|DesktopEntries\.(byId|heuristicLookup)' "$page"; then
    fail 'page snapshots or performs a one-time desktop-entry lookup'
fi
if rg -F --quiet 'label: "Could not apply the change"' "$page"; then
    fail 'error heading incorrectly describes read failures as apply failures'
fi
if rg --quiet '#[0-9A-Fa-f]{3,8}' "$page"; then
    fail 'page introduces a color literal instead of the shared visual system'
fi

[[ "$(rg --count 'activatable:' "$page")" -ge 2 ]] \
    || fail 'default and autostart rows are not both whole-row activatable'

picker="$project_root/config/dot/quickshell/modules/settings/AutostartAppPicker.qml"
qmldir="$project_root/config/dot/quickshell/modules/settings/qmldir"
[[ -f "$picker" ]] || fail 'autostart application picker is missing'
rg -Fq 'required property var existing' "$picker" \
    || fail 'autostart picker cannot exclude existing entries'
rg -Fq 'signal picked(string id)' "$picker" \
    || fail 'autostart picker does not emit a validated desktop id'
rg -q '^AutostartAppPicker 1\.0 AutostartAppPicker\.qml$' "$qmldir" \
    || fail 'autostart picker is not registered in the Settings module'

printf 'applications settings contract: PASS\n'