#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2015-2017 OpenFOAM Foundation
#    \\/     M anipulation  |
#-------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM 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 General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     foamNewBC
#
# Description
#     Create directory of source and compilation files for a new BC
#
#------------------------------------------------------------------------------
Script=${0##*/}
dir="$FOAM_ETC/codeTemplates/BC"

usage() {
    cat<<USAGE
Usage: $Script [OPTIONS] <base> <type> <boundaryConditionName>
options:
  -help  | -h         print the usage

Create directory of source and compilation files for a new boundary condition
  <boundaryConditionName> (dir)
  - .C and .H source files
  - Make (dir)
    - files
    - options
  Compiles a library named lib<boundaryConditionName>.so in \$FOAM_USER_LIBBIN:
  $FOAM_USER_LIBBIN

<base> conditions:
-f | -fixedValue    | fixedValue
-m | -mixed         | mixed

<type> options:
-a | -all    | all  | template (creates a template class)
-s | -scalar | scalar
-v | -vector | vector
-t | -tensor | tensor
-symmTensor  | symmTensor
-sphericalTensor | sphericalTensor

USAGE
    exit 1
}

error() {
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    usage
    exit 1
}

cap() {
    echo "$1" | sed -e 's/^./\U&/'
}

# Implicitly covers a lone -help
[ "$#" -gt 1 ] || usage

case "$1" in
(-h | -help)
    usage && exit 0
    ;;
(-f | -fixedValue | fixedValue)
    base=fixedValue
    ;;
(-m | -mixed | mixed )
    base=mixed
    ;;
(*)
    error "Unknown <base> condition '$1'"
    ;;
esac
shift

case "$1" in
(-a | -all | all | template)
    type=Type
    unit='VALUE-or-(VALUE 0 0)'
    ;;
(-s | -scalar | scalar)
    type=scalar
    unit=VALUE
    ;;
(-v | -vector | vector)
    type=vector
    unit='(VALUE 0 0)'
    ;;
(-t | -tensor | tensor)
    type=tensor
    unit='(VALUE 0 0 0 0 0 0 0 0)'
    ;;
(-symmTensor | symmTensor)
    type=symmTensor
    unit='(VALUE 0 0 0 0 0)'
    ;;
(-sphericalTensor | sphericalTensor)
    type=sphericalTensor
    unit=VALUE
    ;;
(*)
    error "Unknown <type> option '$1'"
    ;;
esac
shift
[ "$#" -eq 1 ] || error "Wrong number of arguments"
name=$1

# Prevents over-writing of existing directory
[ -d "$name" ] && error "$name directory already exists, aborting..."
echo "Creating $name directory" && mkdir "$name"

# Establish meta template files to copy
files=$(find "${dir}" -name "*.*" -type f -exec basename {} \;)
[ "$type" = "Type" ] || \
    files=$(find "${dir}" -name "BC.[CH]" -type f -exec basename {} \;)

# Substitutions for meta-template files
field="Field<${type}>"
[ "$type" = "Type" ] || field=${type}Field

fvpatchf=fvPatch$(cap $field)
class=$name$(cap "$fvpatchf")
parent=$base$(cap "$fvpatchf")
construct=$(echo "$class" | sed 's/<Type>//g')
year=$(date +%Y)

# Create some example values for the Description
n=0
for N in zero one two three four
do
    eval $N="$(echo \"$unit\" | sed "s#VALUE#$n#g")"
    n=$(( n + 1 ))
done

# Make substitutions to meta-template files
for f in $files
do
    ext=$(echo "$f" | sed "s#BC##")
    new_file=${construct}${ext}
    echo "   Adding file ${new_file}..."

    # Adds readScalar function when type = scalar
    # shellcheck disable=SC2154
    sed -e "s#TYPE#${type}#g" \
        -e "s#NAME#${name}#g" \
        -e "s#BASE#${base}#g" \
        -e "s#CONSTRUCT#${construct}#g" \
        -e "s#YEAR#${year}#g" \
        -e "s#CLASS#${class}#g" \
        -e "s#FIELD#${field}#g" \
        -e "s#FVPATCHF#${fvpatchf}#g" \
        -e "s#PARENT#${parent}#g" \
        -e "s#ZERO#${zero}#g" \
        -e "s#ONE#${one}#g" \
        -e "s#TWO#${two}#g" \
        -e "s#THREE#${three}#g" \
        -e "s#FOUR#${four}#g" \
        -e 's/>>/>>/g' \
        "${dir}/${f}" > "${name}/${new_file}"

    case $base in
        fixedValue)
            # refValue(), refGrad(), valueFraction() removed
            # phip removed
            sed -i \
                -e '/refValue/d' \
                -e '/refGrad/d' \
                -e '/valueFraction/d' \
                -e '/const scalarField\& phip/,/);/d' \
                "${name}/${new_file}"
            ;;
        mixed)
            # evaluate() removed
            # operator== becomes refValue() =
            sed -i \
                -e '/evaluate/d' \
                -e 's/operator==/refValue() =/g' \
                "${name}/${new_file}"
            ;;
    esac

    case $type in
        Type)
            # Build Macro removed (in ..Fields.C)
            sed -i -e '/Build Macro/,/^}/d' \
                "${name}/${new_file}"
            ;;
        *)
            # template<class Type> removed
            # this-> removed
            # .template functionTemplate<...> becomes functionTemplate<...>
            # template instantiation repository removed
            sed -i \
                -e '/^template<class Type>$/d' \
                -e 's/this->//g' \
                -e 's/\.template[\t ]*\([a-zA-Z]\)/\.\1/g' \
                -e '/#ifdef NoRepository/,/\/\/ */d' \
                "${name}/${new_file}"
            ;;
    esac
done

echo "Creating Make subdirectory" && cp -r "${dir}/Make" "${name}"

# Get ...Fields.C for template class, otherwise ...Field.C
compiled=$(find "${name}" -name "*.C" -exec basename {} \; | sort | tail -1)
sed -i -e "s#NAME#${name}#g" -e "s#COMPILED.*#${compiled}#g" "${name}/Make/files"

#------------------------------------------------------------------------------