#!/bin/bash

set -euo pipefail  # Best practice: fail fast on errors, unset vars, pipeline failures

FILE="${1:-}"
FILE_TYPE="${2:-auto}"
OUTPUT_DIR="${3:-}"
PREFIX_ARGS="${4:-}"
ADDITIONAL_ARGS="${5:-}"

# Validate that a file was provided
if [[ -z "$FILE" ]]; then
  echo "Error: No file specified." >&2
  exit 1
fi

# Resolve relative paths and check if file exists
if [[ ! -f "$FILE" ]]; then
  echo "Error: File not found: '$FILE'" >&2
  exit 1
fi

# Auto-detect file type if needed
if [[ "$FILE_TYPE" == "auto" ]]; then
  if [[ "$FILE" =~ \.(tar\.gz|tgz)$ ]]; then
    FILE_TYPE="tgz"
  elif [[ "$FILE" =~ \.zip$ ]]; then
    FILE_TYPE="zip"
  else
    echo "Error: Unable to auto-detect file type from extension '$FILE'. Specify 'zip' or 'tgz'." >&2
    exit 1
  fi
fi

# Ensure output directory exists if specified
if [[ -n "$OUTPUT_DIR" ]]; then
  mkdir -p "$OUTPUT_DIR"
fi

# Build the extraction command
case "$FILE_TYPE" in
  tgz)
    COMMAND=(tar $PREFIX_ARGS -xzf "$FILE" $ADDITIONAL_ARGS)
    [[ -n "$OUTPUT_DIR" ]] && COMMAND+=(-C "$OUTPUT_DIR")
    ;;
  zip)
    COMMAND=(unzip $PREFIX_ARGS -o "$FILE" $ADDITIONAL_ARGS)
    [[ -n "$OUTPUT_DIR" ]] && COMMAND+=(-d "$OUTPUT_DIR")
    ;;
  *)
    echo "Error: Invalid fileType '$FILE_TYPE'. Must be 'auto', 'zip', or 'tgz'." >&2
    exit 1
    ;;
esac

# Output the built command (for GitHub Actions step output or local debugging)
if [[ -z "${GITHUB_OUTPUT-}" ]]; then
  GITHUB_OUTPUT="/dev/stdout"
fi
echo "command=${COMMAND[*]}" >> "$GITHUB_OUTPUT"

# Execute the command safely using an array (prevents word splitting issues)
exec "${COMMAND[@]}"