Allrun

#!/bin/bash

# ensure that the script exits immediately if a command within exits with a non-zero status
set -e

# Source OpenFOAM environment functions
# The :? will cause the script to exit if WM_PROJECT_DIR is not set.
. ${WM_PROJECT_DIR:?}/bin/tools/RunFunctions

# Function to set up a single case
set-up-case(){
    file_of_concern1="./constant/fluidRegion/phaseProperties"   
    abs_momentumSource_z="${1}"
    
    # Simple check for existence
    if [[ ! -f "${file_of_concern1}" ]]; then
        echo "${file_of_concern1} doesn't exist"
        exit 1
    fi
     
    sed -i "s/momentumSource      (0 0 -300000);/momentumSource      (0 0 -${abs_momentumSource_z});/" ${file_of_concern1}
    return 
}

# --- Main Script ---
#define the Data file
DataFile="./Data/data.csv"
# define the directory where different cases are kept
case_space="./case_space"
# define the template directory
# this is the root case upon which all other cases in the ./case_space directory are based
directory_template="./template"

#check if DataFile exists
if [[ ! -f "${DataFile}" ]]; then
    echo "Error: ./Data/data.csv doesn't exist or can't be accessed"
    exit 1
fi

# checks if the template directory exists
if [[ ! -d ${directory_template} ]]; then
  echo "Error: 'template' directory not found in the specified directory."
  exit 1
fi

# Create the case space if it doesn't exist
mkdir -p "${case_space}"


# read data row by row
tail -n +2 "${DataFile}" | while IFS=, read -r caseName abs_momentumSource_z

do 
    echo "-----------------------------------------------------"
    echo "Processing Case: ${caseName}"
    echo "Momentum Source Z (Absolute): ${abs_momentumSource_z}"
    echo "-----------------------------------------------------"
    new_case="${case_space}/${caseName}"
   
    if [[ -d "${new_case}" ]]; then
        echo "Warning: Case directory '${new_case}' already exists. Skipping copy."
    else
        cp -r "${directory_template}" "${new_case}"
        echo "Directory Created: ${new_case}"
    fi
    
    (
        cd ${new_case}
        # Set up the case
        set-up-case "${abs_momentumSource_z}"
        echo "Case has been set up."
        # Run the simulation
        echo "--> Starting simulation with $(getApplication)..."
        if $(getApplication)> case-run.log 2>&1 ; then
            echo "--> Simulation completed successfully for ${caseName}."
        else
            echo "*****************************************************" >&2
            echo "ERROR: Simulation FAILED for case ${caseName}." >&2
            echo "Check the log file for details: ${new_case}/case-run.log" >&2
            echo "*****************************************************" >&2
        fi
    )   
    
done

echo "=========================================="
echo "All cases processed."
echo "=========================================="