scfmt

#!/usr/bin/env zsh

# Change macOS screenshot output format.
# Usage: scfmt png | jpg | ...

SUPPORTED_FORMATS=(png jpg jpeg gif tiff heic)

scfmt() {
  cat <<EOF
Usage: $(basename "$0") <format>

Change the macOS screenshot format.

Supported (known) formats:
  ${SUPPORTED_FORMATS[*]}

Examples:
  $(basename "$0") png
  $(basename "$0") jpg

Current format: $(defaults read com.apple.screencapture type 2>/dev/null || echo "unknown")
EOF
}

# Show help if no args or -h/--help
if [[ $# -ne 1 || "$1" == "-h" || "$1" == "--help" ]]; then
  scfmt
  exit 0
fi

# Check if running on macOS
if [[ "$(uname)" != "Darwin" ]]; then
  echo "Error: This script only works on macOS." >&2
  exit 1
fi

format="${1:l}"  # lowercase

# Warn if format is not in our known list
if [[ " ${SUPPORTED_FORMATS[*]} " != *" $format "* ]]; then
  echo "Warning: '$format' is not in the known list: ${SUPPORTED_FORMATS[*]}" >&2
  echo "macOS may still support it, but double-check." >&2
fi

echo "Setting screenshot format to '$format'..."

# Check if defaults command succeeds
if ! defaults write com.apple.screencapture type "$format"; then
  echo "Error: Failed to set screenshot format." >&2
  exit 1
fi

# Restart UI server so change takes effect
if ! killall SystemUIServer >/dev/null 2>&1; then
  echo "Warning: Could not restart SystemUIServer. You may need to log out and back in." >&2
fi

# Verify the change
new_format=$(defaults read com.apple.screencapture type 2>/dev/null)
if [[ "$new_format" == "$format" ]]; then
  echo "✓ Successfully set screenshot format to '$format'."
else
  echo "Warning: Format was set, but verification shows '$new_format' instead of '$format'." >&2
fi