set -euo pipefail

OUTPUT_PATH="${DARWIN_CLIPBOARD_OUTPUT:-$HOME/darwin-clipboard-history.jsonl}"

POLL_INTERVAL="${DARWIN_CLIPBOARD_POLL:-0.5}"

MAX_BYTES=65536

if command -v wl-paste &>/dev/null && [ -n "${WAYLAND_DISPLAY:-}" ]; then

  CLIP_CMD="wl-paste --no-newline 2>/dev/null"

elif command -v xclip &>/dev/null && [ -n "${DISPLAY:-}" ]; then

  CLIP_CMD="xclip -o -selection clipboard 2>/dev/null"

elif command -v xsel &>/dev/null && [ -n "${DISPLAY:-}" ]; then

  CLIP_CMD="xsel --clipboard --output 2>/dev/null"

else

  echo "[clipboard-daemon] No display or clipboard tool found. Headless CT? Exiting." >&2

  exit 1

fi

last=""

echo "[clipboard-daemon] Started. Writing to $OUTPUT_PATH"

while true; do

  current=$(eval "$CLIP_CMD" || echo "")

  if [ -n "$current" ] && [ "$current" != "$last" ]; then

    ts=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

    byte_len=${

    if [ "$byte_len" -gt "$MAX_BYTES" ]; then

      current="${current:0:$MAX_BYTES}...[TRUNCATED]"

    fi

    escaped=$(printf '%s' "$current" | python3 -c "import json,sys; print(json.dumps(sys.stdin.read()))" 2>/dev/null || echo '""')

    printf '{"ts":"%s","content":%s,"len":%d}\n' "$ts" "$escaped" "$byte_len" >> "$OUTPUT_PATH"

    last="$current"

  fi

  sleep "$POLL_INTERVAL"

done