#!/bin/bash

want_cic_cache_version=0.3.0a2
want_cicada_version=0.0.6rc1

setup_debug(){
    . aux/bdbg/bdbg.sh
    _level=${BASH_DEBUG_LEVEL:-2}
    _debug=${BASH_DEBUG:-0}
    debug_flag=
    if [ ! -z "$_debug"] && [ "$_level" -eq 1 ]; then
        debug_flag="$debug_flag"
        elif [ ! -z "$_debug"] && [ "$_level" -gt 1 ]; then
        debug_flag="-v"
    fi
}

setup_cic_gpg(){
    mkdir -vp $HOME/.local/share/cic/.gnupg
    chmod 700 $HOME/.local/share/cic/.gnupg
    for f in ./keys/*.asc; do
        gpg --homedir $HOME/.local/share/cic/.gnupg --import $f
    done
    gpg --homedir $HOME/.local/share/cic/.gnupg --import-ownertrust ./keys/trust
}




get_default_enviroment(){
    dbg $dbg_debug "load default environment"
    
    config_directives=(CIC_REGISTRY_ADDRESS CIC_TRUST_ADDRESS META_URL TX_CACHE_URL CHAIN_SPEC)
    
    for c in ${config_directives[@]}; do
        v=${!c}
        if [ -z "$v" ]; then
            d=`mktemp -d`
            curl -X GET --cacert $CIC_ROOT_CA_FILE $CIC_ROOT_URL/$c -o $d/$c
            gpg --homedir $HOME/.local/share/cic/.gnupg --verify $d/$c
            v=`gpg --homedir $HOME/.local/share/cic/.gnupg -d $d/$c` # Decrypt
            echo $v >> $t
            dbg $dbg_debug "fetched environment variable $v"
        else
            dbg $dbg_debug "using predefined environment variable for $c = $v"
        fi
    done
}
init_env(){
    dbg $dbg_debug "identify root values"
    t=`mktemp`
    set -e # Exit immediately if a command exits with a non-zero status
    get_default_enviroment
    set -a
    . $t
    set +a
    
    # DATABASE_NAME set here works as long as only one database is involved...
    export DATABASE_PREFIX=$HOME/.local/share/cic/cache/${DATABASE_PREFIX:-staffclient}
    export DATABASE_ENGINE=sqlite
    export DATABASE_DRIVER=pysqlite
    export DATABASE_DEBUG=0
    export DATABASE_POOL_SIZE=0
    export DATABASE_USER=postgres
    export DATABASE_PASSWORD=`dd if=/dev/urandom bs=32 count=1 2> /dev/null | hexdump -v -n 32 -e '1/1 "%02x"'`
    if [ -d "$HOME/.config/cic/staff-client/.gnupg" ]; then
        echo "Staff Client GPG keyring already exists"
    else
        dbg $dbg_debug "set up keys"
        if [ -z "$AUTH_KEY" ]; then
            . setup_key.sh
        else
            t=`mktemp`
            gpg --export -a $AUTH_KEY > $t
            echo -n $AUTH_KEY > $HOME/.config/cic/staff-client/key_fingerprint
            dbg $dbg_info "using key $AUTH_KEY"
        fi
    fi
    export AUTH_KEY=`cat $HOME/.config/cic/staff-client/key_fingerprint`
    export AUTH_KEYRING_PATH=$HOME/.config/cic/staff-client/.gnupg
    export AUTH_DB_PATH=$HOME/.local/share/cic/clicada
    
    touch "$HOME/.config/cic/staff-client/.envinit"
}

check_cache_version(){
    v=`pip show cic-cache | awk '/^Version/ {print $2;}'`
    if [ "$?" -ne 0 ]; then
        dbg $dbg_warn "cic-cache is not installed. will update"
        update=1
        elif [ "$v" != "$want_cic_cache_version" ]; then
        dbg $dbg_warn "cic-cache version $v installed but need $want_cic_cache_version, will update"
        update=1
    else
        dbg $dbg_info "cic-cache version $v found"
    fi
}

check_cicada_version(){
    v=`pip show clicada | awk '/^Version/ {print $2;}'`
    if [ "$?" -ne 0 ]; then
        dbg $dbg_warn "clicada is not installed, will update"
        update=1
        elif [ "$v" != "$want_cicada_version" ]; then
        dbg $dbg_warn "clicada version $v installed but need $want_cicada_version, will update"
        update=1
    else
        dbg $dbg_info "clicada version $v found"
    fi
}

update_requirements(){
    if [ $update -gt 0 ]; then
        dbg $dbg_debug "installing application files"
        
        pip3 install --user --index-url $PIP_INDEX_URL --extra-index-url $PIP_EXTRA_INDEX_URL $PIP_EXTRA_ARGS $debug_flag -r requirements.txt
        update_path $HOME/.local/bin
    fi
}

install_cache_configuration(){
    if [ -f $HOME/.config/cic/cache/config.ini ]; then
        dbg $dbg_debug "migrating existing configuration"
        cic_cache_config_flag="-c $HOME/.config/cic/cache"
    fi
    cic-cache-trackerd --dumpconfig ini $cic_cache_config_flag $debug_flag > $t
    
    mkdir -vp $HOME/.config/cic/cache
    mv -v $t $HOME/.config/cic/cache/config.ini
}

install_clicada_configuration(){
    if [ -d $HOME/.config/cic/clicada/config.ini ]; then
        dbg $dbg_debug "migrating existing clicada configuration"
        clicada_config_flag="-c $HOME/.config/cic/clicada"
    fi
    clicada --dumpconfig ini $clicada_config_flag > $t
    
    mkdir -vp $HOME/.config/cic/clicada
    mv -v $t $HOME/.config/cic/clicada/config.ini
}


export_cache_tracker_config(){
    t=`mktemp`
    cic-cache-trackerd --dumpconfig env $cic_cache_config_flag $debug_flag > $t
    
    set -a # Forces a variable to be exported even if it wasn't before
    . $t
    set +a
}
execute_cache_database_migrations(){
    dbg $dbg_debug "execute database migrations"
    mkdir -vp $HOME/.local/share/cic/cache
    # This has the default log level set to debug
    migrate_cic_cache.py -c $HOME/.config/cic/cache/
}
export_clicada_config(){
    t=`mktemp`
    clicada --dumpconfig env $clicada_config_flag $debug_flag > $t
    set -a
    . $t
    set +a
}

setup_debug

PIP_EXTRA_ARGS=$PIP_EXTRA_ARGS
PIP_EXTRA_INDEX_URL=${PIP_EXTRA_INDEX_URL:-https://pip.grassrootseconomics.net}
PIP_INDEX_URL=${PIP_INDEX_URL:-"https://pypi.org/simple"}
CIC_SETUP_TRUSTED_FINGERPRINT=${CIC_SETUP_TRUSTED_FINGERPRINT:-0826EDA1702D1E87C6E2875121D2E7BB88C2A746}
CIC_ROOT_URL=${CIC_ROOT_URL:-https://root.grassrootseconomics.net/env/dev}
CIC_ROOT_CA_FILE=${CIC_ROOT_CA_FILE:-keys/ge.ca}

if [ "$UID" -eq 0 ]; then
    dbg $dbg_error "This cannot be run as root"
    exit 1
fi

. setup_check.sh
. setup_path.sh

mkdir -vp $HOME/.local/bin

dbg $dbg_debug "importing keys"
setup_cic_gpg
# check if we have existing setup
if [ ! -e  "$HOME/.config/cic/staff-client/.envinit" ]; then
    init_env
fi

set +e
dbg $dbg_debug "checking installed versions"
update=0
check_cache_version
check_cicada_version
set -e
update_requirements
dbg $dbg_debug "installing configurations"
t=`mktemp`
install_cache_configuration
install_clicada_configuration
export_cache_tracker_config
execute_cache_database_migrations
export_clicada_config

. setup_systemd.sh