#!/usr/bin/env bash
# Yamada Hayao
# Twitter: @Hayao0819
# Email  : hayao@fascode.net
#
# (c) 2019-2020 Fascode Network.
#

set -e

checklive=false
alterlive=false
url="https://fascode.net/projects/linux/alter/alter-welcome.php"
browser="chromium --start-maximized --app=%s"
custombrowser=false
nourlmode=false

defaultbrowserlist=(
    "vivaldi-stable --start-maximized --app=%s"
    "brave --start-maximized --app=%s"
    "firefox-developer-edition %s"
    "firefox %s"
    "chromium --start-maximized --app=%s"
    "google-chrome  --start-maximized --app=%s"
)

remove () {
    local _list
    local _file
    _list=($(echo "$@"))
    for _file in "${_list[@]}"; do
        if [[ -f ${_file} ]]; then
            rm -f "${_file}"
        elif [[ -d ${_file} ]]; then
            rm -rf "${_file}"
        fi
    done
}

_help() {
    echo "Displays the AlterLinux welcome page"
    echo "usage alterlinux-welcome-page [options]"
    echo
    echo " General options:"
    echo "    -b | --browser <cmd>  Specify the browser command."
    echo "                          %s will be replaced with the URL"
    echo "    -u | --url <url>      Set the URL."
    echo "                          Default: ${url}"
    echo "    -l | --live           Opens the page only in a live environment."
    echo "                          Whether it is a live environment or not is determined"
    echo "                          by the presence or absence of the installer."
    echo "    --alterlive           Delete the startup file for the live environment."
    echo "    -h | --help           This help message and exit."
    echo
    echo "%s is replaces with the URL"
    echo " Browser list:"
    local _browser _browser_count
    for ((_browser_count = 0; _browser_count < ${#defaultbrowserlist[@]}; _browser_count++)); do
        echo "    ${defaultbrowserlist[${_browser_count}]}"
    done
}

_msg_error() {
    echo "${@}" >&2
}

_msg_warn() {
    echo "${@}" >&2
}

# Argument analysis and processing
options="${@}"
_opt_short="b:u:lh"
_opt_long="browser:,url:,live,help,alterlive,aobuta"
OPT=$(getopt -o ${_opt_short} -l ${_opt_long} -- "${@}")
if [[ ${?} != 0 ]]; then
    exit 1
fi

eval set -- "${OPT}"
unset OPT
unset _opt_short
unset _opt_long

while true; do
    case ${1} in
        -b | --browser)
            browser="${2}"
            custombrowser=true
            shift 2
            ;;
        -l | --live)
            checklive=true
            shift 1
            ;;
        -u | --url)
            url="${2}"
            shift 2
            ;;
        -h | --help)
            _help
            shift 1
            exit 0
            ;;
        --aobuta)
            url="https://ao-buta.com/"
            shift 1
            ;;
        --alterlive)
            alterlive=true
            shift 1
            ;;
        --)
            shift
            break
            ;;
        *)
            _msg_error "Invalid argument '${1}'"
            _help
            exit 1
            ;;
    esac
done

if [[ "${checklive}" = true ]]; then
    if [[ -n $(pacman -Q alterlinux-calamares) ]]; then
        exit 0
    fi
fi

# ブラウザが指定されていないなら一覧から自動で検出する
if [[ "${custombrowser}" = false ]]; then
    defaultbrowserlist+=("END_OF_LIST")
    for ((_browser_count = 0; _browser_count < ${#defaultbrowserlist[@]}; _browser_count++)); do
        _browser="${defaultbrowserlist[${_browser_count}]}"
        if [[ -f $(type -P "$(echo ${_browser} | awk '{print $1}')") ]]; then
            browser="${_browser}"
            break
        elif [[ "${_browser}" == "END_OF_LIST" ]]; then
            _msg_error "No available browser is installed."
            exit 1
        fi
    done
elif [[ -z "$(echo "${browser}" | grep "%s")" ]]; then
    # -bで%sが指定されていないならコマンドの後にURLを付ける
    nourlmode=true
fi

if [[ "${nourlmode}" = true ]]; then
    _msg_warn "Directly executed with URL as an argument because %s was not specified."
    eval ${browser} ${url} &
else
    eval $(printf "${browser}" "${url}") &
fi

if [[ "${alterlive}" = true ]]; then
    remove ~/.config/autostart/welcome_page.desktop
fi