#!/bin/bash
set -euo pipefail

############################################################
# Script: pinall.sh
#
# Description:
#   This script reads a list of S3 object keys (filenames)
#   from a file, downloads each file from Backblaze B2,
#   adds it to a local IPFS node, and optionally cleans up
#   the temporary downloaded file to save disk space.
#
# Usage:
#   ./pinall.sh <file-with-s3-keys>
#   Example:
#     # sudo -u ipfs env IPFS_PATH=/mnt/blockstorage/ipfs pinall.sh /home/ipfs/filenames.txt
#
#   - files.txt should contain one S3 key per line.
#   - Lines starting with '#' or empty lines are ignored.
#
# Environment:
#   - Requires `b2` CLI configured with B2 credentials.
#   - Requires an IPFS node installed and accessible at
#     $IPFS_PATH (set in script).
#
# Behavior:
#   1. Reads each key from the input file.
#   2. Downloads the file from B2 to /tmp/<key>.
#   3. Adds the downloaded file to IPFS (CID version 1).
#   4. Deletes the temporary file after adding to IPFS.
#   5. Logs progress with timestamps to stdout.
#
# Exit Codes:
#   - 0: All files processed successfully.
#   - 1: Incorrect usage or missing input file.
#
############################################################

# Usage check
if [ $# -ne 1 ]; then
  echo "Usage: $0 <file-with-s3-keys>"
  exit 1
fi

ipfs id
echo "Using IPFS_PATH=$IPFS_PATH"

FILELIST=$1

while IFS= read -r KEY; do
  [[ -z "$KEY" || "$KEY" =~ ^# ]] && continue

  echo "[$(date +"%Y-%m-%d %H:%M:%S")] Downloading $KEY from B2..."
  TMPFILE="/tmp/$KEY"

  if b2 file download "b2://futureporn/$KEY" "$TMPFILE"; then
    echo "[$(date +"%Y-%m-%d %H:%M:%S")] Download complete: $KEY"
  else
    echo "[$(date +"%Y-%m-%d %H:%M:%S")] Download failed: $KEY"
    rm -f "$TMPFILE"
    continue
  fi

  echo "[$(date +"%Y-%m-%d %H:%M:%S")] Adding $KEY to IPFS..."
  ipfs add --cid-version=1 "$TMPFILE"

  # optional cleanup to save space
  rm -f "$TMPFILE"

done < "$FILELIST"

echo "[$(date +"%Y-%m-%d %H:%M:%S")] All tasks complete."