#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later

set -eux
set -o pipefail

# shellcheck source=test/units/assert.sh
. "$(dirname "$0")"/assert.sh

enable_debug() {
    mkdir -p /run/systemd/system/systemd-localed.service.d
    cat >>/run/systemd/system/systemd-localed.service.d/override.conf <<EOF
[Service]
Environment=SYSTEMD_LOG_LEVEL=debug
EOF

    mkdir -p /run/systemd/system/systemd-vconsole-setup.service.d
    cat >>/run/systemd/system/systemd-vconsole-setup.service.d/override.conf <<EOF
[Unit]
StartLimitIntervalSec=0

[Service]
Environment=SYSTEMD_LOG_LEVEL=debug
EOF

    systemctl daemon-reload
}

restore_locale() {
    if [[ -d /usr/lib/locale/xx_XX.UTF-8 ]]; then
        rmdir /usr/lib/locale/xx_XX.UTF-8
    fi

    if [[ -f /tmp/locale.conf.bak ]]; then
        mv /tmp/locale.conf.bak /etc/locale.conf
    else
        rm -f /etc/locale.conf
    fi

    if [[ -f /tmp/default-locale.bak ]]; then
        mv /tmp/default-locale.bak /etc/default/locale
    else
        rm -f /etc/default/locale
        rmdir --ignore-fail-on-non-empty /etc/default
    fi

    if [[ -f /tmp/locale.gen.bak ]]; then
        mv /tmp/locale.gen.bak /etc/locale.gen
    else
        rm -f /etc/locale.gen
    fi
}

test_locale() {
    local i output

    if [[ -f /etc/locale.conf ]]; then
        cp /etc/locale.conf /tmp/locale.conf.bak
    fi

    # Debian/Ubuntu specific file
    if [[ -f /etc/default/locale ]]; then
        cp /etc/default/locale /tmp/default-locale.bak
    fi

    if [[ -f /etc/locale.gen ]]; then
        cp /etc/locale.gen /tmp/locale.gen.bak
    fi

    # remove locale.conf to make /etc/default/locale used by Debian/Ubuntu
    rm -f /etc/locale.conf
    # also remove /etc/default/locale
    rm -f /etc/default/locale
    # and create /etc/default to make /etc/default/locale created by localed
    mkdir -p /etc/default

    trap restore_locale RETURN

    if command -v locale-gen >/dev/null 2>&1 &&
           ! localectl list-locales | grep -F "en_US.UTF-8"; then
        # ensure at least one utf8 locale exist
        echo "en_US.UTF-8 UTF-8" > /etc/locale.gen
        locale-gen en_US.UTF-8
    fi

    # create invalid locale
    mkdir -p /usr/lib/locale/xx_XX.UTF-8
    assert_not_in "xx_XX.UTF-8" "$(localectl list-locales)"

    if [[ -z "$(localectl list-locales)" ]]; then
        echo "No locale installed, skipping test."
        return
    fi

    # warn when kernel command line has locale settings
    output=$(SYSTEMD_PROC_CMDLINE="locale.LANG=C.UTF-8 locale.LC_CTYPE=ja_JP.UTF-8" localectl 2>&1)
    assert_in "Warning:" "$output"
    assert_in "Command Line: LANG=C.UTF-8" "$output"
    assert_in "LC_CTYPE=ja_JP.UTF-8" "$output"
    assert_in "System Locale:" "$output"

    # change locale
    for i in $(localectl list-locales); do
        assert_rc 0 localectl set-locale "LANG=C" "LC_CTYPE=$i"
        if [[ -f /etc/default/locale ]]; then
            assert_eq "$(cat /etc/default/locale)" "LANG=C
LC_CTYPE=$i"
        else
            assert_eq "$(cat /etc/locale.conf)" "LANG=C
LC_CTYPE=$i"
        fi
        output=$(localectl)
        assert_in "System Locale: LANG=C" "$output"
        assert_in "LC_CTYPE=$i" "$output"
        output=$(systemctl show-environment)
        assert_in "LANG=C" "$output"
        assert_in "LC_CTYPE=$i" "$output"

        assert_rc 0 localectl set-locale "$i"
        if [[ -f /etc/default/locale ]]; then
            # Debian/Ubuntu patch is buggy, and LC_CTYPE= still exists.
            assert_eq "$(cat /etc/default/locale)" "LANG=$i
LC_CTYPE=$i"
        else
            assert_eq "$(cat /etc/locale.conf)" "LANG=$i"
        fi
        output=$(localectl)
        assert_in "System Locale: LANG=$i" "$output"
        assert_not_in "LC_CTYPE=" "$output"
        output=$(systemctl show-environment)
        assert_in "LANG=$i" "$output"
        assert_not_in "LC_CTYPE=" "$output"
    done

    # test if localed auto-runs locale-gen
    if command -v locale-gen >/dev/null 2>&1 &&
           ! localectl list-locales | grep -F "de_DE.UTF-8"; then

        # clear previous locale
        systemctl stop systemd-localed.service
        rm -f /etc/locale.conf /etc/default/locale

        # change locale
        assert_rc 0 localectl set-locale de_DE.UTF-8
        if [[ -f /etc/default/locale ]]; then
            assert_eq "$(cat /etc/default/locale)" "LANG=de_DE.UTF-8"
        else
            assert_eq "$(cat /etc/locale.conf)" "LANG=de_DE.UTF-8"
        fi
        assert_in "System Locale: LANG=de_DE.UTF-8" "$(localectl)"
        assert_in "LANG=de_DE.UTF-8" "$(systemctl show-environment)"

        # ensure tested locale exists and works now
        assert_in "de_DE.UTF-8" "$(localectl list-locales)"
    fi
}

backup_keymap() {
    if [[ -f /etc/vconsole.conf ]]; then
        cp /etc/vconsole.conf /tmp/vconsole.conf.bak
    fi

    if [[ -f /etc/X11/xorg.conf.d/00-keyboard.conf ]]; then
        cp /etc/X11/xorg.conf.d/00-keyboard.conf /tmp/00-keyboard.conf.bak
    fi

    # Debian/Ubuntu specific file
    if [[ -f /etc/default/keyboard ]]; then
        cp /etc/default/keyboard /tmp/default-keyboard.bak
    fi

    mkdir -p /etc/default
}

restore_keymap() {
    if [[ -f /tmp/vconsole.conf.bak ]]; then
        mv /tmp/vconsole.conf.bak /etc/vconsole.conf
    else
        rm -f /etc/vconsole.conf
    fi

    if [[ -f /tmp/00-keyboard.conf.bak ]]; then
        mv /tmp/00-keyboard.conf.bak /etc/X11/xorg.conf.d/00-keyboard.conf
    else
        rm -f /etc/X11/xorg.conf.d/00-keyboard.conf
    fi

    if [[ -f /tmp/default-keyboard.bak ]]; then
        mv /tmp/default-keyboard.bak /etc/default/keyboard
    else
        rm -f /etc/default/keyboard
        rmdir --ignore-fail-on-non-empty /etc/default
    fi
}

wait_vconsole_setup() {
    local i ss
    for ((i = 0; i < 20; i++)); do
        if (( i != 0 )); then sleep .5; fi
        ss="$(systemctl --property SubState --value show systemd-vconsole-setup.service)"
        if [[ "$ss" == "exited" || "$ss" == "dead" || "$ss" == "condition" ]]; then
            return 0
        elif [[ "$ss" == "failed" ]]; then
            echo "WARNING: systemd-vconsole-setup.service failed, ignoring." >&2
            systemctl reset-failed systemd-vconsole-setup.service
            return 0
        fi
    done

    systemctl status systemd-vconsole-setup.service
    return 1
}

test_vc_keymap() {
    local i output

    if [[ -z "$(localectl list-keymaps)" ]]; then
        echo "No vconsole keymap installed, skipping test."
        return
    fi

    backup_keymap
    trap restore_keymap RETURN

    # should activate daemon and work
    assert_in "VC Keymap:" "$(localectl)"

    for i in $(localectl list-keymaps); do
        # clear previous conversion from VC -> X11 keymap
        systemctl stop systemd-localed.service
        wait_vconsole_setup
        rm -f /etc/X11/xorg.conf.d/00-keyboard.conf /etc/default/keyboard

        # set VC keymap
        assert_rc 0 localectl set-keymap "$i"
        output=$(localectl)

        # check VC keymap
        assert_in "KEYMAP=$i" "$(cat /etc/vconsole.conf)"
        assert_in "VC Keymap: $i" "$output"

        # check VC -> X11 keymap conversion
        if [[ "$i" == "us" ]]; then
            assert_in "X11 Layout: us" "$output"
            assert_in "X11 Model: pc105\+inet" "$output"
            assert_not_in "X11 Variant:" "$output"
            assert_in "X11 Options: terminate:ctrl_alt_bksp" "$output"
        elif [[ "$i" == "us-acentos" ]]; then
            assert_in "X11 Layout: us" "$output"
            assert_in 'X11 Model: pc105$' "$output"
            assert_in "X11 Variant: intl" "$output"
            assert_in "X11 Options: terminate:ctrl_alt_bksp" "$output"
        elif [[ "$i" =~ ^us-.* ]]; then
            assert_in "X11 Layout: n/a" "$output"
            assert_not_in "X11 Model:" "$output"
            assert_not_in "X11 Variant:" "$output"
            assert_not_in "X11 Options:" "$output"
        fi
    done

    # gets along without config file
    systemctl stop systemd-localed.service
    wait_vconsole_setup
    rm -f /etc/vconsole.conf
    assert_in "VC Keymap: n/a" "$(localectl)"
}

test_x11_keymap() {
    local output

    if [[ -z "$(localectl list-x11-keymap-layouts)" ]]; then
        echo "No x11 keymap installed, skipping test."
        return
    fi

    backup_keymap
    trap restore_keymap RETURN

    # should activate daemon and work
    assert_in "X11 Layout:" "$(localectl)"

    # set x11 keymap (layout, model, variant, options)
    assert_rc 0 localectl set-x11-keymap us pc105+inet intl terminate:ctrl_alt_bksp

    if [[ -f /etc/default/keyboard ]]; then
        assert_eq "$(cat /etc/default/keyboard)" "XKBLAYOUT=us
XKBMODEL=pc105+inet
XKBVARIANT=intl
XKBOPTIONS=terminate:ctrl_alt_bksp"
    else
        output=$(cat /etc/X11/xorg.conf.d/00-keyboard.conf)
        assert_in 'Option "XkbLayout" "us"' "$output"
        assert_in 'Option "XkbModel" "pc105\+inet"' "$output"
        assert_in 'Option "XkbVariant" "intl"' "$output"
        assert_in 'Option "XkbOptions" "terminate:ctrl_alt_bksp"' "$output"
    fi

    output=$(localectl)
    assert_in "X11 Layout: us" "$output"
    assert_in "X11 Model: pc105\+inet" "$output"
    assert_in "X11 Variant: intl" "$output"
    assert_in "X11 Options: terminate:ctrl_alt_bksp" "$output"

    # Debian/Ubuntu patch is buggy, unspecified settings are not cleared
    rm -f /etc/default/keyboard

    # set x11 keymap (layout, model, variant)
    assert_rc 0 localectl set-x11-keymap us pc105+inet intl

    if [[ -f /etc/default/keyboard ]]; then
        assert_eq "$(cat /etc/default/keyboard)" "XKBLAYOUT=us
XKBMODEL=pc105+inet
XKBVARIANT=intl"
    else
        output=$(cat /etc/X11/xorg.conf.d/00-keyboard.conf)
        assert_in 'Option "XkbLayout" "us"' "$output"
        assert_in 'Option "XkbModel" "pc105\+inet"' "$output"
        assert_in 'Option "XkbVariant" "intl"' "$output"
        assert_not_in 'Option "XkbOptions"' "$output"
    fi

    output=$(localectl)
    assert_in "X11 Layout: us" "$output"
    assert_in "X11 Model: pc105\+inet" "$output"
    assert_in "X11 Variant: intl" "$output"
    assert_not_in "X11 Options:" "$output"

    # Debian/Ubuntu patch is buggy, unspecified settings are not cleared
    rm -f /etc/default/keyboard

    # set x11 keymap (layout, model)
    assert_rc 0 localectl set-x11-keymap us pc105+inet

    if [[ -f /etc/default/keyboard ]]; then
        assert_eq "$(cat /etc/default/keyboard)" "XKBLAYOUT=us
XKBMODEL=pc105+inet"
    else
        output=$(cat /etc/X11/xorg.conf.d/00-keyboard.conf)
        assert_in 'Option "XkbLayout" "us"' "$output"
        assert_in 'Option "XkbModel" "pc105\+inet"' "$output"
        assert_not_in 'Option "XkbVariant"' "$output"
        assert_not_in 'Option "XkbOptions"' "$output"
    fi

    output=$(localectl)
    assert_in "X11 Layout: us" "$output"
    assert_in "X11 Model: pc105\+inet" "$output"
    assert_not_in "X11 Variant:" "$output"
    assert_not_in "X11 Options:" "$output"

    # Debian/Ubuntu patch is buggy, unspecified settings are not cleared
    rm -f /etc/default/keyboard

    # set x11 keymap (layout)
    assert_rc 0 localectl set-x11-keymap us

    if [[ -f /etc/default/keyboard ]]; then
        assert_eq "$(cat /etc/default/keyboard)" "XKBLAYOUT=us"
    else
        output=$(cat /etc/X11/xorg.conf.d/00-keyboard.conf)
        assert_in 'Option "XkbLayout" "us"' "$output"
        assert_not_in 'Option "XkbModel"' "$output"
        assert_not_in 'Option "XkbVariant"' "$output"
        assert_not_in 'Option "XkbOptions"' "$output"
    fi

    output=$(localectl)
    assert_in "X11 Layout: us" "$output"
    assert_not_in "X11 Model:" "$output"
    assert_not_in "X11 Variant:" "$output"
    assert_not_in "X11 Options:" "$output"

    # gets along without config file
    systemctl stop systemd-localed.service
    rm -f /etc/X11/xorg.conf.d/00-keyboard.conf /etc/default/keyboard
    output=$(localectl)
    assert_in "X11 Layout: n/a" "$output"
    assert_not_in "X11 Model:" "$output"
    assert_not_in "X11 Variant:" "$output"
    assert_not_in "X11 Options:" "$output"
}

: >/failed

enable_debug
test_locale
test_vc_keymap
test_x11_keymap

touch /testok
rm /failed