#!/usr/bin/env sh
set -eu

app_id="io.github.comicviewer.Comicviewer"
script_dir="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
install_dir="${HOME}/.local/opt/comicviewer"
bin_dir="${HOME}/.local/bin"
data_home="${XDG_DATA_HOME:-${HOME}/.local/share}"
config_home="${XDG_CONFIG_HOME:-${HOME}/.config}"
cache_home="${XDG_CACHE_HOME:-${HOME}/.cache}"
applications_dir="${data_home}/applications"
icons_dir="${data_home}/icons/hicolor/scalable/apps"
installed_appimage="${install_dir}/Comicviewer.AppImage"
launcher="${bin_dir}/comicviewer"
installed_desktop="${applications_dir}/${app_id}.desktop"
installed_icon="${icons_dir}/${app_id}.svg"
temporary_appimage=""
temporary_desktop=""

cleanup() {
    [ -z "${temporary_appimage}" ] || rm -f "${temporary_appimage}"
    [ -z "${temporary_desktop}" ] || rm -f "${temporary_desktop}"
}
trap cleanup EXIT HUP INT TERM

refresh_desktop() {
    if command -v update-desktop-database >/dev/null 2>&1; then
        update-desktop-database "${applications_dir}" >/dev/null 2>&1 || true
    fi
}

install_dependencies() {
    if [ "${COMICVIEWER_SKIP_DEPENDENCIES:-0}" = "1" ]; then
        return
    fi
    if ! command -v pacman >/dev/null 2>&1; then
        printf '%s\n' "필수 패키지 자동 설치는 Arch Linux와 CachyOS만 지원합니다." >&2
        exit 1
    fi

    set --
    for package in fuse2 gtk4 dav1d gvfs gvfs-smb gstreamer curl gst-plugins-base \
        gst-plugins-good gst-plugins-bad gst-libav; do
        if ! pacman -Q "${package}" >/dev/null 2>&1; then
            set -- "$@" "${package}"
        fi
    done
    if [ "$#" -eq 0 ]; then
        return
    fi

    printf '필수 패키지를 설치합니다: %s\n' "$*"
    if [ "$(id -u)" -eq 0 ]; then
        pacman -S --needed "$@"
    else
        if ! command -v sudo >/dev/null 2>&1; then
            printf '%s\n' "필수 패키지를 설치하려면 sudo가 필요합니다." >&2
            exit 1
        fi
        sudo pacman -S --needed "$@"
    fi
}

if [ "${1:-}" = "--uninstall" ]; then
    rm -f "${launcher}" "${installed_desktop}" "${installed_icon}" \
        "${installed_appimage}"
    rm -rf "${config_home}/comicviewer" "${data_home}/comicviewer" \
        "${cache_home}/comicviewer"
    rmdir "${install_dir}" 2>/dev/null || true
    refresh_desktop
    printf '%s\n' "Comicviewer와 설정, 읽기 기록, 캐시를 모두 제거했습니다."
    exit 0
fi

if [ "$#" -ne 0 ]; then
    printf '사용법: %s [--uninstall]\n' "$(basename -- "$0")" >&2
    exit 2
fi

install_dependencies

set -- "${script_dir}"/Comicviewer-*-x86_64.AppImage
if [ "$#" -ne 1 ] || [ ! -f "$1" ]; then
    printf '%s\n' "번들에서 Comicviewer AppImage 한 개를 찾을 수 없습니다." >&2
    exit 1
fi

appimage="$1"
checksum="${appimage}.sha256"
desktop_file="${script_dir}/${app_id}.desktop"
icon_file="${script_dir}/${app_id}.svg"

for required_file in "${checksum}" "${desktop_file}" "${icon_file}"; do
    if [ ! -f "${required_file}" ]; then
        printf '필수 파일이 없습니다: %s\n' "$(basename -- "${required_file}")" >&2
        exit 1
    fi
done

(cd "${script_dir}" && sha256sum -c "$(basename -- "${checksum}")")

mkdir -p "${install_dir}" "${bin_dir}" "${applications_dir}" "${icons_dir}"
temporary_appimage="${install_dir}/.Comicviewer.AppImage.tmp.$$"
temporary_desktop="${applications_dir}/.${app_id}.desktop.tmp.$$"

install -m 0755 "${appimage}" "${temporary_appimage}"
mv -f "${temporary_appimage}" "${installed_appimage}"
temporary_appimage=""
ln -sfn "${installed_appimage}" "${launcher}"
while IFS= read -r line || [ -n "${line}" ]; do
    case "${line}" in
        Exec=*) printf 'Exec="%s" %%f\n' "${launcher}" ;;
        *) printf '%s\n' "${line}" ;;
    esac
done < "${desktop_file}" > "${temporary_desktop}"
chmod 0644 "${temporary_desktop}"
mv -f "${temporary_desktop}" "${installed_desktop}"
temporary_desktop=""
install -m 0644 "${icon_file}" "${installed_icon}"
refresh_desktop

if ! command -v gio >/dev/null 2>&1; then
    printf '%s\n' "주의: 원격 파일 접근을 위해 gvfs와 gvfs-smb를 설치하세요." >&2
fi

printf '%s\n' "Comicviewer 설치 또는 업데이트를 완료했습니다."
printf '실행: %s\n' "${launcher}"