#!/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

            data)

                svn up $FGADDON

                ;;

            source)

                typeset -A control_system_data=(

                    git pull

                    svn up

                )

                for control_system update_command in ${(kv)control_system_data}; do

                    find $fgfs_source \

                        -maxdepth 2 \

                        -mindepth 1 \

                        -type d \

                        -name .${control_system} \

                        -printf "\n[ %h ]\n" \

                        -execdir ${control_system} ${update_command} \;

                done

                unset control_system_data control_system update_command

                ;;

            build)

                local simultaneous=$(nproc)

                local previously_installed=()

                mkdir -p $fgfs_install

                for component in $(<$fgfs_source/ordre); do

# TODO: prendre en compte les cas sans cmake

                    title="*** $component:u ***"

                    printf "\n%s\n%s\n%s\n" "${(l:${#title}::*:)}" "$title" "${(l:${#title}::*:)}"

                    local cmake_options=("-DCMAKE_BUILD_TYPE=Release" "-DCMAKE_INSTALL_PREFIX=$fgfs_install/$component")

                    [[ ${#previously_installed[@]} -gt 0 ]] \

                        && cmake_options+=(${(j. .)${:--DCMAKE_PREFIX_PATH=$fgfs_install/${^previously_installed}}})

                    cmake_options+=("-j$simultaneous")

                    test -e $fgfs_source/${component}.specific && source $fgfs_source/${component}.specific

                    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"

                        return

                    }

                    previously_installed+=($component)

                    cd -

                done

                unset component

                ;;

        esac

    }

    function ld_library_path () {

        IFS_=$IFS

        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

        IFS=$IFS_

        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

############ 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|))

                    for up in ${${=${fgfs_arg#--update}:-data source build}#-}; do

                        update_fg $up

                    done

                    unset up

                    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

                    ;;

                *)

                    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

}