#!/usr/bin/env bash
# compare_wsl.sh
# Usage: ./compare_wsl.sh /path/to/file1 /path/to/file2

set -euo pipefail

if [[ $# -ne 2 ]]; then
  echo "Usage: $0 <linux_path_to_file1> <linux_path_to_file2>"
  exit 1
fi

# Input (Linux) paths
F1_LINUX="$1"
F2_LINUX="$2"

# Basic checks
if [[ ! -e "$F1_LINUX" ]]; then
  echo "Error: '$F1_LINUX' does not exist." >&2
  exit 1
fi
if [[ ! -e "$F2_LINUX" ]]; then
  echo "Error: '$F2_LINUX' does not exist." >&2
  exit 1
fi
if ! command -v wslpath >/dev/null 2>&1; then
  echo "Error: wslpath not found." >&2
  exit 1
fi

# Resolve to absolute Linux paths (helps if you pass relative paths)
# 'readlink -f' is available on most WSL distros; if not, remove these two lines.
F1_LINUX="$(readlink -f "$F1_LINUX")"
F2_LINUX="$(readlink -f "$F2_LINUX")"

# === Prepare required variables ===
# Filenames only
F1_NAME="$(basename "$F1_LINUX")"
F2_NAME="$(basename "$F2_LINUX")"

# Windows-mapped absolute paths
F1_PATH="$(wslpath -w "$F1_LINUX")"
F2_PATH="$(wslpath -w "$F2_LINUX")"

# (Optional) show what we computed
#echo "F1_PATH=$F1_PATH"
#echo "F1_NAME=$F1_NAME"
#echo "F2_PATH=$F2_PATH"
#echo "F2_NAME=$F2_NAME"

# === Example: launch ExamDiff via Windows PowerShell ===
# Adjust ExamDiff path if your version/path differs.
POWERSHELL="/mnt/c/Windows/System32/WindowsPowerShell/v1.0/powershell.exe"
EXAMDIFF="C:\\Program Files\\ExamDiff Pro 16.0\\ExamDiff.exe"

# Use Start-Process with an explicit -ArgumentList.
# We wrap the entire PowerShell command in double quotes so Bash expands our vars,
# and we escape the inner double quotes so PowerShell receives proper strings.
"$POWERSHELL" -NoProfile -Command \
"Start-Process -FilePath '$EXAMDIFF' -ArgumentList \
\"$F1_PATH\",\"$F2_PATH\",\"/dn1:$F1_NAME\",\"/dn2:$F2_NAME\",\"/nh\""

# If you prefer to block until ExamDiff exits, add: -Wait
# ...like:
# \"$F1_PATH\",\"$F2_PATH\",\"/dn1:$F1_NAME\",\"/dn2:$F2_NAME\",\"/nh\" -Wait