#!/bin/zsh

#FGDIR=$HOME/scripts/flightgear
#FGADDON=$HOME/.fgfs/flightgear-fgaddon
function fgfs () {
    local fgfs_source=$FGDIR/source
    local fgfs_build=$FGDIR/build
    local fgfs_install=$FGDIR/install
    function update_fg () {
        case $1 in
            fgaddon)
                DB=$FGADDON/fgaddon.db $HOME/.fgfs/fgaddon
                ;;
            check)
                test -r $HOME/.fgfs/jenkins-status && bash $HOME/.fgfs/jenkins-status
                ;;
            rss)
                test -r $HOME/.fgfs/fgcoderss && bash $HOME/.fgfs/fgcoderss
                ;;
            data)
                for control_system update_command in ${(kv)control_system_data}; do
                    find $FGADDON \
                        -maxdepth 3 \
                        -mindepth 1 \
                        -type d \
                        -name .${control_system} \
                        -printf "\n[ %h ]\n" \
                        -execdir ${control_system} ${update_command} \;
                done
                ;;
            source)
                for component in $(<$fgfs_source/.$2); do
                    for control_system update_command in ${(kv)control_system_data}; do
                        find $fgfs_source/$component \
                            -maxdepth 1 \
                            -type d \
                            -name .${control_system} \
                            -printf "\n[ %h ]\n" \
                            -execdir ${control_system} ${update_command} \;
                    done
                done
                ;;
            build)
                local simultaneous=$(nproc)
                local previously_installed=()
                mkdir -p $fgfs_install
                for component in $(<$fgfs_source/.$2); do
                    if test -d $fgfs_source/$component/.git; then
                        local branch=$(git -C $fgfs_source/$component name-rev --name-only --no-undefined --always HEAD)
                    elif test -d $fgfs_source/${component}/.svn; then
                        local branch=${${(s:/:)$(svn info --show-item relative-url $fgfs_source/$component)}[2]}
                    fi
                    title="*** ${component:u}${branch:+ [$branch]} ***"
                    printf "\n%s\n%s\n%s\n" "${(l:${#title}::*:)}" "$title" "${(l:${#title}::*:)}"

# TODO: prendre en compte les cas sans cmake
                    if test -r $fgfs_source/$component/CMakeLists.txt; then
                        local cmake_options=("-DCMAKE_BUILD_TYPE=Release" "-DCMAKE_INSTALL_PREFIX=$fgfs_install/$component")
                        test -e $fgfs_source/${component}.specific && source $fgfs_source/${component}.specific
                        if test ${#previously_installed[@]} -gt 0; then
                            cmake_options+=(${(j. .)${:--DCMAKE_PREFIX_PATH=$fgfs_install/${^previously_installed}}})
                            cmake_options+=(${(j. .)${:--DCMAKE_INCLUDE_PATH=$fgfs_install/${^previously_installed}/include}})
                        fi
                        cmake_options+=("-j$simultaneous")

                        mkdir -p $fgfs_build/$component
                        cd $fgfs_build/$component

                        echo cmake ${cmake_options[@]} $fgfs_source/$component

                        cmake ${cmake_options[@]} $fgfs_source/$component > /dev/null \
                        && make -j$simultaneous > /dev/null \
                        && make install \
                        || {
                            echo "erreur construction $component"
                            cd $FGDIR
                            return
                        }
                    fi

                    previously_installed+=($component)
                    cd -
                done
                unset component
                ;;
        esac
    }
    function ld_library_path () {
        local IFS=$'\n'
        for lib in $(ls -d $FGDIR/install/*/lib); do
            egrep -q "(^|:)$lib(:|$)" <<< "${LD_LIBRARY_PATH}" || LD_LIBRARY_PATH="${lib}${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"
        done
        export LD_LIBRARY_PATH
    }
    local aircrafts="$FGADDON/Aircraft"
    local fgfs_args=("--fg-root=$FGDIR/source/fgdata")
    local aircraft=
    local airport=
    if [[ -o BASH_REMATCH ]]; then
        local bash_rematch_set=1
    fi

    for fgfs_arg in $@; do
        if test ${fgfs_arg#--} = ${fgfs_arg}; then
############ APPAREIL DANS FGADDON ?
            if test -n "$(find $aircrafts -maxdepth 2 -type f -name ${fgfs_arg}-set.xml -print -quit)"; then
                fgfs_args+=("--aircraft=$fgfs_arg")
                fgfs_args+=("--fg-aircraft=$FGADDON/Aircraft")

############ APPAREIL DANS FGDIR/source/fgdata ?
            elif official_aircraft=$(find "$fgfs_source/fgdata/Aircraft" -maxdepth 2 -type f -name ${fgfs_arg}-set.xml -printf "%h" -quit) && test -n "$official_aircraft"; then
                fgfs_args+=("--aircraft=$fgfs_arg")
                fgfs_args+=("--aircraft-dir=$official_aircraft")
                unset official_aircraft

############ APPAREIL DANS FGADDON ?
            elif which sqlite3 > /dev/null 2>&1 \
            && test -r $FGADDON/fgaddon.db \
            && test $(sqlite3 $FGADDON/fgaddon.db <<< "select count(file) from setxml where file is '${fgfs_arg}'") -eq 1; then
                model=$(sqlite3 $FGADDON/fgaddon.db <<< "select name from aircrafts inner join setxml on aircrafts.id = setxml.variantof where setxml.file is '${fgfs_arg}'")
                read -q "REPLY?download $model ? (y/N) "
                if test -n "$REPLY" && test ${REPLY:l} = "y"; then
                    svn co https://svn.code.sf.net/p/flightgear/fgaddon/trunk/Aircraft/$model $FGADDON/Aircraft/$model
                    fgfs_args+=("--aircraft=$fgfs_arg")
                else
                    echo "aircraft $fgfs_arg isn't installed"
                    return
                fi

############ SERVEUR MULTIPLAY ?
            elif set -o BASH_REMATCH && [[ $fgfs_arg =~ "^mp([0-9]+)$" ]]; then
                fgfs_args+=("--multiplay=out,10,mpserver${BASH_REMATCH[2]}.flightgear.org,5000")
                fgfs_args+=("--callsign=f-zakh")
                test -z "$bash_rematch_set" && set +o BASH_REMATCH

############ DEMANDE DE TRACE DE VOL ?
            elif [[ $fgfs_arg == "log" ]]; then
                # option construite plus tard avec nom de l'appareil
                local log_requested=1

############ AEROPORT ?
            else 
                local candidate_airport=${fgfs_arg%:*}; [[ $candidate_airport == $fgfs_arg ]] && candidate_airport=${fgfs_arg%+*}
                local candidate_parking=${fgfs_arg#*:}; [[ $candidate_parking == $fgfs_arg ]] && unset candidate_parking
                local candidate_runway=${fgfs_arg#*+};  [[ $candidate_runway  == $fgfs_arg ]] && unset candidate_runway
                local terrafs=${candidate_airport#-}

                if [[ $terrafs != $candidate_airport && -x $HOME/.fgfs/terrafs && -d $HOME/.fgfs/terrafs.d ]]; then
                    candidate_airport=$terrafs
                    $HOME/.fgfs/terrafs $HOME/.fgfs/terrafs.d
                    fgfs_args+=(--fg-scenery=$HOME/.fgfs/terrafs.d)
                    fgfs_args+=(--disable-terrasync)
                    local scenes_dir=$HOME/.fgfs/terrafs.d
                else
                    fgfs_args+=(--terrasync-dir=$HOME/.fgfs/TerraSync)
                    fgfs_args+=(--enable-terrasync)
                    local scenes_dir=$HOME/.fgfs/TerraSync
                fi

                local airport_data="$scenes_dir/Airports/$candidate_airport[1]:u/$candidate_airport[2]:u/$candidate_airport[3]:u/${candidate_airport:u}"
                if [[ -a "${airport_data}.threshold.xml" ]]; then
                    fgfs_args+=(--airport=$candidate_airport)
                    if [[ -a "${airport_data}.groundnet.xml" && -n "$candidate_parking" ]]; then
                        if test $candidate_parking = '?'; then
                          echo "Parkings ${candidate_airport:u}:"
                          sed -rn "/<parkingList/,/parkingList>/s/^.* name=\"([^\"]+).*$/\1/p" ${airport_data}.groundnet.xml
                          return
                        elif sed -rn "/<parkingList/,/parkingList>/p" ${airport_data}.groundnet.xml | grep -q "name=\"${candidate_parking}\""; then
                            fgfs_args+=("--parkpos='$candidate_parking'")
                        fi
                    elif test -n "$candidate_runway"; then
                        if test $candidate_runway = '?'; then
                            echo "Runways ${candidate_airport:u}:"
                            sed -rn 's|^.*<rwy>(.+)</rwy>.*$|\1|p' ${airport_data}.threshold.xml
                            return
                        elif grep -q "<rwy>${candidate_runway}</rwy>" ${airport_data}.threshold.xml; then
                            fgfs_args+=("--runway=$candidate_runway")
                        fi
                    fi
                fi
            fi

######## AUTRE OPTION
        else
            case $fgfs_arg in
                --update(-data|-source|-build|))
                    if test -z "$2" || test ! -r $fgfs_source/.$2; then
                        echo "${2:+unknown set $2\n}usage: --update|--update-data|--update-source|--update-build <set>"
                        echo "available sets :" ${$(find $fgfs_source -maxdepth 1 -type f -name ".*" -printf "%f ")//#.}
                        return 1
                    fi
                    for component in $(<$fgfs_source/.$2); do
                        if ! test -d $fgfs_source/$component; then
                            echo component $component not found
                            return 1
                        fi
                    done
                    typeset -A control_system_data=(
                        git pull
                        svn up
                    )
                    for up in ${${=${fgfs_arg#--update}:-data source build}#-}; do
                        update_fg $up ${2:-flightgear}
                    done
                    unset control_system_data control_system update_command up
                    return
                    ;;
                --update-(fgaddon|check|rss))
                    update_fg ${fgfs_arg#--update-}
                    return
                    ;;
                --(show-aircraft|help))
                    local -A complement=(
                        --show-aircraft --fg-aircraft=$FGADDON/Aircraft
                        --help          --verbose
                    )
                    ld_library_path
                    $FGDIR/install/flightgear/bin/fgfs $fgfs_arg ${complement[$fgfs_arg]} 2>/dev/null | pager
                    return
                    ;;
                --search)
                    command -v sqlite3 > /dev/null || return
                    sqlite3 $FGADDON/fgaddon.db <<< "select file from setxml where file like '%$2%'"
                    return
                    ;;
                --mp-list)
                    local mplist=$(mktemp --dry-run /dev/shm/XXXXXXXXX)
                    declare -A installed_model fgaddon_model unknown_model
                    local ac_name=
                    telnet mpserver01.flightgear.org 5001 2>/dev/null > $mplist
                    grep 'pilot(s) online' $mplist
                    echo
                    for model in $(awk '/@/{a[$NF]++}END{for (i in a) print i}' $mplist); do
                        if test -r $FGADDON/$model \
                             -o -r $FGDIR/source/fgdata/$model; then
                            installed_model[${${(s:/:)model}[2]}]=1
                        elif test -r $FGDIR/source/fgdata/AI/$model; then
                            installed_model[*${${(s:/:)model}[2]}]=1
                        elif test -n "$(command -v sqlite3)" -a -r $FGADDON/fgaddon.db; then
                            ac_name=$(sqlite3 $FGADDON/fgaddon.db <<< 'select     printf("%s/%s", aircrafts.name, setxml.file)
                                                                       from       aircrafts
                                                                       inner join setxml
                                                                       where      aircrafts.id = setxml.variantof
                                                                       and        setxml.`/sim/model/path` = "'$model'"
                                                                       limit      1')
                            if test -n "$ac_name"; then
                                fgaddon_model[${ac_name}]=1
                            else
                                unknown_model[${model}]=1
                            fi
                        else
                            unknown_model[${model}]=1
                        fi
                    done
                    if test ${#installed_model[@]} -gt 0; then
                        echo "${(j:\n:)${(Ok)installed_model[@]}}" > $mplist
                        echo -e "${#installed_model[@]} models installed (*AI model only):\n$(column -c$(tput cols) $mplist)\n"
                    fi
                    if test ${#fgaddon_model[@]} -gt 0; then
                        echo "${(j:\n:)${(Ok)fgaddon_model[@]}}" > $mplist
                        echo -e "${#fgaddon_model[@]} models available in FGADDON:\n$(column -c$(tput cols) $mplist)\n"
                    fi
                    if test ${#unknown_model[@]} -gt 0; then
                        echo "${(j:\n:)${(Ok)unknown_model[@]}}" > $mplist
                        echo -e "${#unknown_model[@]} unknown models:\n$(column -c$(tput cols) $mplist)"
                    fi
                    unset installed_model unknown_model fgaddon_model
                    rm $mplist
                    return
                    ;;
                *)
                    fgfs_args+=($fgfs_arg);;
            esac
        fi
    done
    unset fgfs_arg
    if [[ -n "$log_requested" && -z "${fgfs_args[(r)--igc=*]}" ]]; then
        fgfs_args+=(--igc=file,out,1,$(date +%Y%m%d-%H%M-${${${fgfs_args[(r)--aircraft=*]}#--aircraft=}:-$(sed -rn 's|^.+aircraft>(.+)</aircraft.+$|\1|p' $FGDIR/source/fgdata/defaults.xml)}.igc))
    fi

    ld_library_path

    echo ${fgfs_args[@]}
# TODO: ne lancer avec primusrun que si c'est nécesaire, d'autres solution existent ?
    primusrun $FGDIR/install/flightgear/bin/fgfs ${fgfs_args[@]}
    
    if grep -q $HOME/.fgfs/terrafs.d /proc/mounts; then
        fusermount -u $HOME/.fgfs/terrafs.d
    fi
    unset fgfs_args
}