#!/bin/bash

# Setup ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
script_path=$0
script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
root_dir="${devenver_root}"

# Arguments ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
clang_dir="$root_dir/LLVM"
cmake_dir="$root_dir/CMake"
node_dir="$root_dir/NodeJS"
python_dir="$root_dir/Python"
virustotal_url="https://www.virustotal.com/gui/file"

# Argument parsing :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
option="$1"
shift

if [ "$option" = "clang"      ]; then                                                         exe_dir="$clang_dir/$1/bin" && PATH="$exe_dir:$PATH"  && cmd_line="$2" && shift && shift; fi
if [ "$option" = "cmake"      ]; then                                                         exe_dir="$cmake_dir/$1"     && PATH="$exe_dir:$PATH"  && cmd_line="$2" && shift && shift; fi
if [ "$option" = "node"       ]; then                                                         exe_dir="$node_dir/$1/bin"  && PATH="$exe_dir:$PATH"  && cmd_line="$2" && shift && shift; fi
if [ "$option" = "python"     ]; then
    python_root=$python_dir/$1/install
    # Shit like building UWSGI in Python via PIP with wheel doesn't seem to use
    # LD_LIBRARY_PATH but LDFLAGS works. Dependency hell
    cmd_prefix="LDFLAGS=${python_root}/lib LD_LIBRARY_PATH=$python_root/lib:$LD_LIBRARY_PATH PYTHONHOME=$python_root" 
    exe_dir="$python_root/bin"
    PATH="$exe_dir:$PATH"
    cmd_line="$2"&& shift && shift;
fi
if [ "$option" = "virustotal" ]; then virustotal_hash=$(sha256sum "$1" | awk '{print $1}')                                                          && cmd_line="xdg-open $virustotal_url/$virustotal_hash &" && shift; fi

if [ -z "$cmd_line" ]; then option="help"; fi
if [ "$option" = "help" ]; then
    clang_versions=$(ls -1 "$clang_dir" 2>/dev/null | tr '\n' ' ')
    cmake_versions=$(ls -1 "$cmake_dir" 2>/dev/null | tr '\n' ' ')
    node_versions=$(ls -1 "$node_dir" 2>/dev/null | tr '\n' ' ')
    python_versions=$(ls -1 "$python_dir" 2>/dev/null | tr '\n' ' ')
    cat << EOF
USAGE: dev [option] [args...]

NOTES:
  Commands suffixed with '_env' augment the system PATH with the tool's path for the current shell session.
  You can chain the commands to augment the PATH, e.g:

    dev.sh python 3.12.9+20250317 dev.sh node 20.18.2 yarn build-everything

OPTIONS:
  cmake [version] [cmd...]      CMake build system:                    'PATH=$cmake_dir/[version]:\$PATH [cmd...]'
                                Versions:                              $cmake_versions

  clang [version] [cmd..]       CLANG compiler:                        'PATH=$clang_dir/[version]:\$PATH [cmd...]'
                                Example:                               'dev clang 18.1.4 clang++.exe --help'
                                Versions:                              $clang_versions

  node [version] [cmd...]       Node JS:                               'PATH=$node_dir/[version]:\$PATH [cmd...]'
                                Versions:                              $node_versions

  python [version] [cmd...]     Python:                                'PATH=$python_dir/[version]/install/bin:\$PATH [cmd...]'
                                Versions:                              $python_versions

  virustotal [file]             Lookup file SHA256 hash on VirusTotal: '$virustotal_url/[file]'
EOF
    exit 0
fi

# Extract user arguments ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
user_args=""
while [ $# -gt 0 ]; do user_args="$user_args $1"; shift; done

# Trim trailing space ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
while [ "${user_args: -1}" = " " ]; do user_args="${user_args% }"; done
while [ "${cmd_line: -1}"  = " " ]; do cmd_line="${cmd_line% }"; done

# Eval ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
echo "DEV: Running '$script_path' with '$cmd_prefix $cmd_line$user_args'"
eval "$cmd_prefix $cmd_line$user_args"