#!/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:$PATH" && cmd_line="$exe_dir/$2" && shift && shift; fi
if [ "$option" = "cmake"      ]; then exe_dir="$cmake_dir/$1"              && PATH="$exe_dir:$PATH" && cmd_line="$exe_dir/$2" && shift && shift; fi
if [ "$option" = "node"       ]; then exe_dir="$node_dir/$1/bin"           && PATH="$exe_dir:$PATH" && cmd_line="$exe_dir/$2" && shift && shift; fi
if [ "$option" = "python"     ]; then exe_dir="$python_dir/$1/install/bin" && PATH="$exe_dir:$PATH" && cmd_line="$exe_dir/$2" && shift && shift; fi
if [ "$option" = "python_env" ]; then PATH="$python_dir/$1/install/bin:$PATH" && shift && cmd_line="$1" && shift; fi
if [ "$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 '_env' commands to augment the PATH, e.g:

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

OPTIONS:
  cmake [version] [exe]  CMake build system:                    '$cmake_dir/[version]/[exe]'
                         Versions:                              $cmake_versions

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

  node [version] [exe]   Node JS:                               '$node_dir/[version]/[exe]'
                         Versions:                              $node_versions

  python [version] [exe] Python:                                '$python_dir/[version]/install/bin/[exe]'
  python_env [cmd...]                                           '$python_dir/[version]/install/bin:[PATH]'
                         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_line$user_args'"
eval "$cmd_line$user_args"