common

#!/bin/zsh

var_keys=(
    INSTALLS
    INSTALL
    INSTALL_STR
    APP
    APP_ROOT
    APP_MARK_EXEC_LOC
    APP_MARK_EXEC
)

declare -A var_types=(
    [INSTALLS]="file"
    [INSTALL]="file"
    [INSTALL_STR]="eval"
    [APP]="eval"
    [APP_ROOT]="eval"
    [APP_MARK_EXEC_LOC]="eval"
    [APP_MARK_EXEC]="file"
)


declare -A vars=(
    [INSTALLS]=$'"./.installs"'
    [INSTALL]=$'"./.install"'
    [INSTALL_STR]=$'"$(echo "$INSTALLS" | head -n"$(( $INSTALL + 0 ))" | tail -n1)"'
    [APP]=$'"$(echo "$INSTALL_STR" | cut -d" " -f1)"'
    [APP_ROOT]=$'"$(echo "$INSTALL_STR" | cut -d" " -f2-)"'
    [APP_MARK_EXEC_LOC]=$'"$(pwd)/apps/${APP}/executables"'
    [APP_MARK_EXEC]=$'"$APP_MARK_EXEC_LOC"'
)

declare -A var_deps=(
    [INSTALLS]=$'()'
    [INSTALL]=$'()'
    [INSTALL_STR]=$'(INSTALLS INSTALL)'
    [APP]=$'(INSTALL_STR)'
    [APP_ROOT]=$'(INSTALL_STR)'
    [APP_MARK_EXEC_LOC]=$'(APP)'
    [APP_MARK_EXEC]=$'(APP_MARK_EXEC_LOC)'
)


declare -A vars_done=()

populate() {
    for key in "${var_keys[@]}"; do
        eval "local this_deps=${var_deps[$key]}"
        for dep in "${this_deps[@]}"; do 
            [[ "${vars_done[$dep]}" != "1" ]] \
                && continue 2
        done

        local var_type="${var_types[$key]}"
        local var="${vars[$key]}"
        if [[ "$var_type" == "file" ]]; then
            eval "local file=$var"
            if [[ -f "$file" ]]; then
                export $key="$(cat "$file")"
                vars_done[$key]=1
            else
                export $key=
            fi
        elif [[ "$var_type" == "eval" ]]; then
            eval "export $key=$var"
            vars_done[$key]=1
        fi
    done
}

populate

if [[ "$APP" != "" ]]; then
    if [[ ! -d "./apps/${APP}" ]]; then
        echo "invalid app name"
        exit 1
    fi
        
    source "./apps/${APP}/common"
    populate
fi

echo "Populated ${(k)vars_done}"

fail_if_not_populated() {
    for var in "$@"; do
        if [[ "${vars_done[$var]}" != "1" ]]; then
            echo "Did not have $var"
            exit 1
        fi
    done
}