#!/bin/sh
#
# Copyright (C) 2015, 2017, 2019, 2020, 2022  Etersoft
# Copyright (C) 2015, 2017, 2019, 2020, 2022  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

load_helper epm-play-common

__check_installed_app()
{
    [ -s $epm_vardir/installed-app ] || return 1
    grep -q -- "^$1\$" $epm_vardir/installed-app
}

__save_installed_app()
{
    [ -d "$epm_vardir" ] || return 0
    __check_installed_app "$1" && return 0
    set_sudo
    echo "$1" | sudorun tee -a $epm_vardir/installed-app >/dev/null
}

__remove_installed_app()
{
    [ -s $epm_vardir/installed-app ] || return 0
    local i
    set_sudo
    for i in $* ; do
        sudorun sed -i "/^$i$/d" $epm_vardir/installed-app
    done
    return 0
}


__is_app_installed()
{
    __run_script "$1" --installed "$2"
    return
}


__get_app_package()
{
    if [ "$PKGFORMAT" = "deb" ] ; then
        local pkgname
        pkgname="$(grep -oP "^PKGNAME=[\"']*\K[^\"']+" "$psdir/$1.sh")" && echo "$pkgname" | tr "[:upper:]" "[:lower:]" && return
    else
        grep -oP "^PKGNAME=[\"']*\K[^\"']+" "$psdir/$1.sh" && return
    fi
    # fallback if PKGNAME is not set directly
    __run_script "$1" --package-name "$2" "$3" 2>/dev/null
}

# args: app pkglistfile
__get_resolved_app_package()
{
    local basepkgname
    local pkglist="$2"

    #if [ "$BASEDISTRNAME" != "alt" ] ; then
    #    __get_app_package "$1"
    #    return
    #fi

    basepkgname="$(grep -oP "^BASEPKGNAME=[\"']*\K[^\"']+" "$psdir/$1.sh")"
    # lithium construct PKGNAME
    [ -z "$basepkgname" ] && __get_app_package "$1" && return # || fatal "Missed both PKGNAME and BASEPKGNAME in the play script $1."
    # fixme: space at the end?
    grep -o -m1 -E "^$basepkgname[ $]" $pkglist && return
    grep -o -m1 -E "^$basepkgname-[a-z0-9-]*[ $]" $pkglist && return
}

__list_all_packages()
{
    local name
    local arch="$SYSTEMARCH"

    for name in $(__get_fast_short_list_app $arch) ; do
        __get_app_package $name
    done
}

__print_targeted_packages()
{
    if [ "$PKGFORMAT" = "deb" ] ; then
        tr "[:upper:]" "[:lower:]" <"$1"
        return
    fi
    cat "$1"
}

# TODO: wrong, missed some packages (f.i., kubo
__list_app_packages_table()
{
    local pkglist="$1"
    local arch="$SYSTEMARCH"
    local IGNOREi586

    local tmplist
    tmplist="$(mktemp)" || fatal
    remove_on_exit $tmplist

    local tmplist1
    tmplist1="$(mktemp)" || fatal
    remove_on_exit $tmplist1

    [ "$arch" = "x86_64" ] && IGNOREi586='NoNo' || IGNOREi586='i586-'

    __get_fast_short_list_app $arch | LC_ALL=C sort -k1,1 >$tmplist
    grep -l -E "^SUPPORTEDARCHES=(''|\"\"|.*\<$arch\>)" $psdir/*.sh | xargs grep -oP "^PKGNAME=[\"']*\K[^\"']+"  | sed -e "s|.*/\(.*\).sh:|\1 |" | grep -v -E "(^$IGNOREi586|^common|#.*$)" | LC_ALL=C sort -k1,1 >$tmplist1
    # tmplist - app
    # tmplist1 - app package
    __print_targeted_packages $tmplist1 | LC_ALL=C join -j 1 -a 1 $tmplist - | while read -r app package ; do
        [ -n "$package" ] || package="$(__get_resolved_app_package $app $pkglist </dev/null)"
        [ -n "$package" ] || continue # fatal "Missed package for $app"
        echo "$package $app"
    done
}


# pkg app
__list_app_packages_table_old()
{
    local name
    local arch="$SYSTEMARCH"
    for name in $(__get_fast_short_list_app $arch) ; do
        local pkg
        for pkg in $(__get_app_package $name) ; do
            echo "$pkg $name"
            # check only first package
            break
        done
    done
}

__get_all_rpm_repacked_packages()
{
    FORMAT="%{Name} %{Version} %{Packager}\n"
    a= rpmquery --queryformat "$FORMAT" -a | grep "EPM <support@e"
}

__filter_by_repacked_rpm_packages()
{
    local i
    local tapt="$1"
    local pkglist="$2"

    LC_ALL=C join -11 -21 $tapt $pkglist | uniq

    # rpm on Fedora/CentOS no more print missed packages to stderr
    # get supported packages list and print lines with it
    #for i in $(epm query --short $(cat $tapt | cut -f1 -d" ") 2>/dev/null) ; do
    #    grep "^$i " $tapt
    #done
}

__filter_by_installed_packages()
{
    local i
    local tapt="$1"
    local pkglist="$2"

    # get intersect between full package list and available packages table
    LC_ALL=C join -11 -21 $tapt $pkglist | uniq | while read -r package app ; do
        if epm status --repacked "$package" </dev/null || epm status --thirdparty "$package" </dev/null  ; then
            echo "$package $app"
        fi
    done
}

__get_installed_table()
{
    local i
    local tapt
    tapt="$(mktemp)" || fatal
    remove_on_exit $tapt

    local pkglist
    pkglist="$(mktemp)" || fatal
    remove_on_exit $pkglist

    if [ "$PKGFORMAT" = "rpm" ] ; then
        # fast hack to get all repacked packages
        # it misses all thirdparty packages installed as is
        __get_all_rpm_repacked_packages | LC_ALL=C sort -u >$pkglist
        __list_app_packages_table $pkglist | LC_ALL=C sort -u >$tapt
        __filter_by_repacked_rpm_packages $tapt $pkglist
    else
        epm --short packages | LC_ALL=C sort -u >$pkglist
        __list_app_packages_table $pkglist | LC_ALL=C sort -u >$tapt
        __filter_by_installed_packages $tapt $pkglist
    fi

    rm -f $tapt
    rm -f $pkglist
}

__list_installed_app()
{
    # get all installed packages and convert it to a apps list
    __get_installed_table | cut -f2 -d" "
}

__list_installed_packages()
{
    # get all installed packages
    __get_installed_table | cut -f1 -d" "
}


__epm_play_list_installed()
{
    local i
    local arch="$SYSTEMARCH"
    if [ -n "$short" ] ; then
        for i in $(__list_installed_app) ; do
            # skip hidden apps
            local desc="$(__get_app_description $i $arch)"
            [ -n "$desc" ] || continue
            echo "$i"
        done
        exit
    fi
    [ -n "$quiet" ] || echo "Installed applications:"
    for i in $(__list_installed_app) ; do
        # skip hidden apps
        local desc="$(__get_app_description $i $arch)"
        [ -n "$desc" ] || continue
        [ -n "$quiet" ] || echo -n "  "
        printf "%-25s - %s\n" "$i" "$desc"
    done
}


epm_play_help()
{
    message '
Usage: epm play [options] [<app>]
Options:
    <app>                 - install <app>
    --remove <app>        - uninstall <app>
    --update [<app>|all]  - update <app> (or all installed apps) if there is new version
    --latest <app>        - forced to install the latest version of the application
    --print-url <app>     - print download URL for the app (do not install)
    --list                - list all installed apps
    --list-all            - list all available apps
    --search <pattern>    - search available apps by name or description
    --list-scripts        - list all available scripts
    --short (with --list) - list names only
    --installed <app>     - check if the app is installed
    --ipfs <app>          - use IPFS for downloading
    --product-alternatives- list alternatives (use like epm play app=beta)

Extra options:
    --installed-version   - print installed version for the app
    --available-version   - print available version for the app
    --package-name        - print package name for the app
    --info                - print info about the app
    --list-installed-packages - print list of all packages installed via epm play
    --list-all-packages   - print list of all packages available via epm play

Examples:
    epm play --remove opera
    epm play yandex-browser = beta
    epm play telegram = beta
    epm play telegram = 4.7.1
    epm play --update all
'
}



__epm_play_update()
{
    local i RES
    local CMDUPDATE="$1"
    shift
    RES=0
    for i in $* ; do
        echo
        echo "$i"
            if ! __is_app_installed "$i" ; then
                continue
            fi
            local pkgname="$(__get_app_package "$i")"
            if [ -n "$pkgname" ] && epm mark checkhold "$pkgname" 2>/dev/null ; then
                info "Skipping $i: package $pkgname is on hold"
                continue
            fi
        prescription="$i"
        if ! has_play_script $prescription ; then
            warning "Can't find executable play script for $prescription. Try epm play --remove $prescription if you don't need it anymore."
            RES=1
            continue
        fi
        __epm_play_run $prescription $CMDUPDATE || RES=$?
    done
    return $RES
}


# name argument
__epm_play_install_one()
{
    local prescription="$1"
    shift

    if has_play_script "$prescription" ; then
        #__is_app_installed "$prescription" && info "$$prescription is already installed (use --remove to remove)" && exit 1
        __epm_play_run "$prescription" --run "$@" && __save_installed_app "$prescription" || fatal "There was some error during install the application."
    else
        local opsdir=$psdir
        psdir=$prsdir
        if ! has_play_script "$prescription" ; then
            psdir=$opsdir
            echo "Unknown app '$prescription'." >&2
            [ -n "$verbose" ] && echo "Checked in $opsdir and $prsdir" >&2
            __epm_play_suggest_similar_apps "$prescription"
            return 1
        fi
        __epm_play_run "$prescription" --run "$@" || fatal "There was some error during run $prescription script."
    fi
}
__get_latest_package_version()
{
    local pkg="$1"
    local ver

    [ -n "$pkg" ] || return 1

    ver="$(fetch_url "https://eepm.ru/app-versions/$pkg")"

    if [ -n "$ver" ] ; then
        echo "$ver"
        return 0
    fi

    return 1
}

__list_available_updates()
{

    local installed_table pkg app installed latest cmp header_printed updates_found line

    installed_table="$(__get_installed_table)"

    [ -n "$installed_table" ] || return 0

    updates_found=0

    while IFS= read -r line ; do

        [ -n "$line" ] || continue
        set -- $line
        pkg="$1"
        app="$2"

        [ -n "$pkg" ] || continue
        [ -n "$app" ] || continue

        installed="$(epm print version for package "$pkg" 2>/dev/null | head -n1)"

        [ -n "$installed" ] || continue

        latest="$(__get_latest_package_version "$pkg")"

        [ -n "$latest" ] || continue

        cmp="$(epm print compare package version "$latest" "$installed" 2>/dev/null)"

        [ "$cmp" = "1" ] || continue

        updates_found=1

        if [ -z "$quiet" ] && [ -z "$short" ] && [ -z "$header_printed" ] ; then
            echo "Applications with available updates:"
            header_printed=1
        fi

        if [ -n "$short" ] ; then
            echo "$app"
            continue
        fi

        if [ -n "$quiet" ] ; then
            printf "%s %s %s\n" "$app" "$installed" "$latest"
        else
            printf "  %-25s %s -> %s\n" "$app" "$installed" "$latest"
        fi

    done <<EOF
    $installed_table
EOF

    if [ "$updates_found" -eq 0 ] && [ -z "$short" ] && [ -z "$quiet" ] ; then
        echo "All installed applications are up to date."
    fi
}


__epm_play_install()
{
   local i RES
   RES=0

   # Handle --installed flag when passed after app name (e.g., "epm play app --installed")
   local has_installed=0
   for i in $* ; do
       [ "$i" = "--installed" ] && has_installed=1 && break
   done

   if [ "$has_installed" = "1" ] ; then
       local RES=0
       while [ -n "$1" ] ; do
           [ "$1" = "--installed" ] && break
           __is_app_installed "$1" || RES=1
           shift
       done
       return $RES
   fi

   load_helper epm-check_updated_repo

   update_repo_if_needed

   # get all options
   options=''
   for i in  $* ; do
       case "$i" in
           --*)
               options="$options $i"
               ;;
       esac
   done

   while [ -n "$1" ] ; do
       case "$1" in
           --*)
               shift
               continue
               ;;
       esac
       local p="$1"
       local v=''
       # drop spaces
       n="$(echo $2)"
       if [ "$n" = "=" ] ; then
           v="$3"
           shift 3
       else
           shift
       fi
       __epm_play_install_one "$p" "$v" $options || RES=1
   done

   return $RES
}

__epm_play_download_epm_file()
{
    local target="$1"
    local file="$2"
    # use short version (3.4.5)
    local epmver="$(epm --short --version)"
    # use baseversion
    epmver=$(echo "$epmver" | sed -e 's|\.[0-9]*$||')

    local URL
    for URL in "https://eepm.ru/releases/$epmver/app-versions" "https://eepm.ru/app-versions" ; do
        info "Updating local IPFS DB in $eget_ipfs_db file from $URL/eget-ipfs-db.txt"
        docmd eget -q -O "$target" "$URL/$file" && return
    done
}


__epm_play_initialize_ipfs()
{
    if [ ! -d "$(dirname "$eget_ipfs_db")" ] ; then
        warning "ipfs db dir $eget_ipfs_db does not exist, skipping IPFS mode"
        return 1
    fi

    if [ ! -r "$eget_ipfs_db" ] ; then
        sudorun touch "$eget_ipfs_db" >&2
        sudorun chmod -v a+rw "$eget_ipfs_db" >&2
    fi

    # download and merge with local db
    local t
    t=$(mktemp) || fatal
    remove_on_exit $t
    __epm_play_download_epm_file "$t" "eget-ipfs-db.txt" || warning "Can't update IPFS DB"
    if [ -s "$t" ] && [ -z "$EPM_IPFS_DB_UPDATE_SKIPPING" ] ; then
        echo >>$t
        cat $eget_ipfs_db >>$t
        sort -u < $t | grep -v "^$" > $eget_ipfs_db
    fi

    # the only one thing is needed to enable IPFS in eget
    export EGET_IPFS_DB="$eget_ipfs_db"
}

epm_play()
{
[ "$EPMMODE" = "package" -o "$EPMMODE" = "git" ] || fatal "epm play is not supported in single file mode"
local psdir="$(realpath $CONFIGDIR/play.d)"
local prsdir="$(realpath $CONFIGDIR/prescription.d)"

if [ -z "$1" ] ; then
    [ -n "$short" ] || [ -n "$quiet" ] || echo "Available applications (for current arch $DISTRARCH):"
    __epm_play_list $psdir
    exit
fi

# allow enable ipfs in global conf
[ "$ipfs" = "--ipfs" ] && __epm_play_initialize_ipfs


while [ -n "$1" ] ; do
case "$1" in
    -h|--help)
        epm_play_help
        exit
        ;;

    --ipfs)
        shift
        [ "$ipfs" = "--ipfs" ] || __epm_play_initialize_ipfs
        ;;

    --remove)
        shift
        if [ -z "$1" ] ; then
            fatal "run --remove with 'all' or a project name"
        fi

        local list
        if [ "$1" = "all" ] ; then
            shift
            info "Retrieving list of installed apps ..."
            list="$(__list_installed_app)"
        else
            list="$*"
        fi

        __epm_play_remove $list
        exit
        ;;

    --update|--upgrade)
        shift
        local CMDUPDATE="--update"
        # check --force on common.sh side
        #[ -n "$force" ] && CMDUPDATE="--run"

        if [ -z "$1" ] ; then
            fatal "run --update with 'all' or a project name"
        fi

        local list
        if [ "$1" = "all" ] ; then
            shift
            info "Retrieving list of installed apps ..."
            list="$(__list_installed_app)"
        else
            list="$*"
        fi

        __epm_play_update $CMDUPDATE $list
        exit
        ;;

    --installed)
        shift
        __is_app_installed "$1" "$2"
        #[ -n "$quiet" ] && exit
        exit
        ;;

    # internal options
    --installed-version|--available-version|--package-name|--product-alternatives|--info)
        __run_script "$2" "$1" "$3"
        exit
        ;;
    --list-installed-packages)
        __list_installed_packages
        exit
        ;;
    --list-all-packages)
        __list_all_packages
        exit
        ;;
    --list|--list-installed)
        __epm_play_list_installed
        exit
        ;;

    --full-list-all)
        [ -n "$short" ] || [ -n "$quiet" ] || echo "Available applications (for current arch $DISTRARCH):"
        __epm_play_list $psdir extra
        exit
        ;;

    --list-all)
        [ -n "$short" ] || [ -n "$quiet" ] || echo "Available applications (for current arch $DISTRARCH):"
        __epm_play_list $psdir
        [ -n "$quiet" ] || [ -n "$*" ] && exit
        echo
        #echo "Run epm play --help for help"
        epm_play_help
        exit
        ;;

    --search)
        shift
        [ -n "$1" ] || fatal "Search pattern is required"
        __epm_play_search "$1"
        exit
        ;;

    --list-scripts)
        [ -n "$short" ] || [ -n "$quiet" ] || echo "Run with a name of a play script to run:"
        __epm_play_list $prsdir
        exit
        ;;

    --list-updates)
        __list_available_updates
        exit
        ;;
    --latest)
        shift
        export latest="true"
        ;;
    --print-url)
        shift
        export EPM_OPTIONS="$EPM_OPTIONS --print-url"
        ;;
    -*)
        fatal "Unknown option $1"
        ;;
     *)
        break
        ;;
esac

done

__epm_play_install $(echo "$*" | sed -e 's|=| = |g')
}
