#!/usr/bin/env bash
# slab-pdf <file.pdf> [more.pdf …] — open PDFs in slab's minimal viewer.
# Appends absolute paths to $SLAB_HOME/state/open-pdf; the menubar's 2 s
# tick consumes the file and raises a chromeless PDFKit panel per document
# (Esc closes, one "Preview" button escapes to Preview.app). Re-asking for
# an open file just brings its window forward. See
# slab/menubar-swift/Sources/SlabMenubar/PdfViewer.swift.
set -euo pipefail

SLAB_HOME="${SLAB_HOME:-$HOME/.local/share/slab}"
REQUEST="$SLAB_HOME/state/open-pdf"

if [ $# -eq 0 ]; then
    echo "usage: slab-pdf <file.pdf> [more.pdf …]" >&2
    exit 1
fi

mkdir -p "$SLAB_HOME/state"

# Which Claude session asked? Walk up the process tree to the claude pid
# (same loop as claude-prompt-log.sh) and match it against the live
# active-prompts markers — the viewer chip then wears that session's
# sticky emoji. Empty when not launched from a Claude session.
session_id=""
claude_pid=$$
for _ in 1 2 3 4 5 6 7 8; do
    parent=$(ps -o ppid= -p "$claude_pid" 2>/dev/null | tr -d ' ')
    [ -z "$parent" ] || [ "$parent" = "1" ] && break
    comm=$(ps -o comm= -p "$parent" 2>/dev/null | tr -d ' ')
    claude_pid=$parent
    case "$comm" in *claude*) break ;; esac
done
if command -v jq >/dev/null 2>&1; then
    for marker in "$SLAB_HOME"/state/active-prompts/*; do
        [ -f "$marker" ] || continue
        if [ "$(jq -r '.claude_pid // 0' "$marker" 2>/dev/null)" = "$claude_pid" ]; then
            session_id=$(jq -r '.session_id // ""' "$marker" 2>/dev/null)
            break
        fi
    done
fi

for f in "$@"; do
    if [ ! -f "$f" ]; then
        echo "slab-pdf: no such file: $f" >&2
        exit 1
    fi
    # realpath isn't guaranteed on stock macOS bash paths — resolve by hand.
    abs="$(cd "$(dirname "$f")" && pwd)/$(basename "$f")"
    printf '%s\t%s\n' "$abs" "$session_id" >> "$REQUEST"
done