#!/bin/bash
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$ROOT"

if [[ $# -ne 1 ]]; then
    echo "Usage: $0 VERSION"
    exit 1
fi

VERSION="$1"

if [[ ! "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
    echo "Invalid version: $VERSION"
    echo "Expected MAJOR.MINOR.PATCH, for example 0.1.6"
    exit 1
fi

STAGE="$ROOT/packaging/root"
OUTPUT="$ROOT/dist/ekklesia-classroom_${VERSION}_amd64.deb"

# Syntax check everything the package ships, by shebang, so this cannot
# drift out of date as classroom commands are added.
echo "Validating sources"

for script in "$ROOT/packaging/debian/postinst" "$ROOT"/scripts/* "$ROOT"/tests/*; do
    [[ -f "$script" ]] || continue

    case "$(head -n 1 "$script")" in
        *python3*)
            python3 -m py_compile "$script"
            ;;
        *bash*|*bin/sh*)
            bash -n "$script"
            ;;
    esac
done

for module in "$ROOT"/lib/*.py; do
    [[ -f "$module" ]] || continue

    python3 -m py_compile "$module"
done

for policy in "$ROOT"/config/chrome/policies/*/*.json; do
    [[ -f "$policy" ]] || continue

    python3 -c 'import json, sys; json.load(open(sys.argv[1]))' "$policy"
done

find "$ROOT/scripts" "$ROOT/lib" \
    -name '__pycache__' -type d -prune -exec rm -rf {} + 2>/dev/null || true

for test in "$ROOT"/tests/test-*.sh; do
    [[ -x "$test" ]] || continue

    echo "Running $(basename "$test")"
    "$test" > /dev/null || {
        echo "Tests failed. Run it directly to see why:"
        echo "  $test"
        exit 1
    }
done

echo "Building Ekklesia Classroom ${VERSION}"

# Always construct the package from clean canonical sources.
rm -rf "$STAGE"
mkdir -p "$STAGE/DEBIAN" "$ROOT/dist"

# Debian package metadata.
sed \
    "s/^Version: @VERSION@$/Version: ${VERSION}/" \
    "$ROOT/packaging/debian/control.template" \
    > "$STAGE/DEBIAN/control"

install -m755 \
    "$ROOT/packaging/debian/postinst" \
    "$STAGE/DEBIAN/postinst"

# Classroom UI configuration.
install -Dm644 \
    "$ROOT/config/sway/config" \
    "$STAGE/etc/ekklesia-classroom/sway/config"

install -Dm644 \
    "$ROOT/config/waybar/config.jsonc" \
    "$STAGE/etc/ekklesia-classroom/waybar/config.jsonc"

install -Dm644 \
    "$ROOT/config/waybar/style.css" \
    "$STAGE/etc/ekklesia-classroom/waybar/style.css"

# Classroom commands.
install -Dm755 \
    "$ROOT/scripts/classroom-browser" \
    "$STAGE/usr/local/bin/classroom-browser"

install -Dm755 \
    "$ROOT/scripts/classroom-window" \
    "$STAGE/usr/local/bin/classroom-window"

install -Dm755 \
    "$ROOT/scripts/classroom-dvd" \
    "$STAGE/usr/local/bin/classroom-dvd"

install -Dm755 \
    "$ROOT/scripts/classroom-dvd-session" \
    "$STAGE/usr/local/bin/classroom-dvd-session"

install -Dm755 \
    "$ROOT/scripts/classroom-dvd-css-setup" \
    "$STAGE/usr/local/bin/classroom-dvd-css-setup"

install -Dm755 \
    "$ROOT/scripts/classroom-notify" \
    "$STAGE/usr/local/bin/classroom-notify"

install -Dm755 \
    "$ROOT/scripts/classroom-notify-test" \
    "$STAGE/usr/local/bin/classroom-notify-test"

install -Dm755 \
    "$ROOT/scripts/classroom-mqtt" \
    "$STAGE/usr/local/bin/classroom-mqtt"

install -Dm755 \
    "$ROOT/scripts/classroom-notifications" \
    "$STAGE/usr/local/bin/classroom-notifications"

install -Dm755 \
    "$ROOT/scripts/classroom-scale" \
    "$STAGE/usr/local/bin/classroom-scale"

install -Dm755 \
    "$ROOT/scripts/classroom-shutdown" \
    "$STAGE/usr/local/bin/classroom-shutdown"

install -Dm755 \
    "$ROOT/scripts/classroom-chrome-setup" \
    "$STAGE/usr/local/bin/classroom-chrome-setup"

install -Dm755 \
    "$ROOT/scripts/classroom-provision" \
    "$STAGE/usr/local/bin/classroom-provision"

install -Dm755 \
    "$ROOT/scripts/classroom-printer-setup" \
    "$STAGE/usr/local/bin/classroom-printer-setup"

# Shared helpers imported by the classroom commands.
install -Dm644 \
    "$ROOT/lib/classroom_config.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_config.py"

install -Dm644 \
    "$ROOT/lib/classroom_icons.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_icons.py"

install -Dm644 \
    "$ROOT/lib/classroom_mqtt.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_mqtt.py"

install -Dm644 \
    "$ROOT/lib/classroom_style.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_style.py"

install -Dm644 \
    "$ROOT/lib/classroom_sway.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_sway.py"

install -Dm644 \
    "$ROOT/lib/classroom_vlc.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_vlc.py"

install -Dm644 \
    "$ROOT/lib/classroom_optical.py" \
    "$STAGE/usr/local/lib/ekklesia-classroom/classroom_optical.py"

install -Dm644 \
    "$ROOT/config/wallpapers/classroom-default.png" \
    "$STAGE/usr/share/backgrounds/ekklesia/classroom-default.png"

install -Dm755 \
    "$ROOT/scripts/classroom-dock" \
    "$STAGE/usr/local/bin/classroom-dock"

# Stylesheet and notification templates. Both carry measurement tokens
# that are resolved from UI_SCALE when the session starts.
install -Dm644 \
    "$ROOT/config/dock/style.css.in" \
    "$STAGE/etc/ekklesia-classroom/dock/style.css.in"

install -Dm644 \
    "$ROOT/config/mako/config.in" \
    "$STAGE/etc/ekklesia-classroom/mako/config.in"

# Chrome enterprise policy: suppress first-run and sign-in nags, and pin
# Home to Wonder Ink. Nothing here restricts where teachers can browse.
install -Dm644 \
    "$ROOT/config/chrome/policies/managed/ekklesia-classroom.json" \
    "$STAGE/etc/opt/chrome/policies/managed/ekklesia-classroom.json"

install -Dm644 \
    "$ROOT/config/chrome/policies/recommended/ekklesia-classroom.json" \
    "$STAGE/etc/opt/chrome/policies/recommended/ekklesia-classroom.json"

install -Dm755 \
    "$ROOT/scripts/ekklesia-classroom-update" \
    "$STAGE/usr/local/bin/ekklesia-classroom-update"

# System configuration.
install -Dm644 \
    "$ROOT/systemd/autologin/autologin.conf" \
    "$STAGE/etc/systemd/system/getty@tty1.service.d/autologin.conf"

install -Dm644 \
    "$ROOT/systemd/updater/ekklesia-classroom-update.service" \
    "$STAGE/etc/systemd/system/ekklesia-classroom-update.service"

install -Dm644 \
    "$ROOT/systemd/updater/ekklesia-classroom-update.timer" \
    "$STAGE/etc/systemd/system/ekklesia-classroom-update.timer"

install -Dm644 \
    "$ROOT/systemd/provision/ekklesia-classroom-provision.service" \
    "$STAGE/etc/systemd/system/ekklesia-classroom-provision.service"

install -Dm644 \
    "$ROOT/systemd/shutdown/ekklesia-classroom-shutdown.service" \
    "$STAGE/etc/systemd/system/ekklesia-classroom-shutdown.service"

install -Dm644 \
    "$ROOT/systemd/mqtt/ekklesia-classroom-mqtt.service" \
    "$STAGE/etc/systemd/system/ekklesia-classroom-mqtt.service"

install -Dm644 \
    "$ROOT/config/icons/dvd.svg" \
    "$STAGE/etc/ekklesia-classroom/icons/dvd.svg"

install -Dm644 \
    "$ROOT/config/icons/live.svg" \
    "$STAGE/etc/ekklesia-classroom/icons/live.svg"

install -Dm644 \
    "$ROOT/config/icons/live-off.svg" \
    "$STAGE/etc/ekklesia-classroom/icons/live-off.svg"

install -Dm644 \
    "$ROOT/config/icons/browser.svg" \
    "$STAGE/etc/ekklesia-classroom/icons/browser.svg"

# DVD mode control bar.
for icon in media-play media-pause chapter-prev chapter-next \
        disc-menu eject close; do
    install -Dm644 \
        "$ROOT/config/icons/${icon}.svg" \
        "$STAGE/etc/ekklesia-classroom/icons/${icon}.svg"
done

printf '%s\n' "$VERSION" > "$ROOT/VERSION"

install -Dm644 \
    "$ROOT/VERSION" \
    "$STAGE/usr/local/lib/ekklesia-classroom/VERSION"

dpkg-deb \
    --root-owner-group \
    --build "$STAGE" "$OUTPUT"

echo
echo "Built:"
echo "$OUTPUT"
sha256sum "$OUTPUT"