#!/usr/bin/env bash
#
# Multi-node variant of add_months.sh. Uses start_spark_and_run.sh to
# allocate a Spark cluster across multiple nodes via salloc. Run this
# from a login node.
#
# For the common single-fat-node case, use add_months.sh instead.
#
# Usage:
#   add_months_multinode.sh NODES YYYY-MM [YYYY-MM ...]
#
# Example (2 nodes, 3 months):
#   add_months_multinode.sh 2 2025-01 2025-02 2025-03
#
# Override dump directories via environment variables if needed:
#
#   COMMENTS_DUMPDIR=/path/to/new/comments \
#   SUBMISSIONS_DUMPDIR=/path/to/new/submissions \
#   ./add_months_multinode.sh 2 2025-01 2025-02
#
# NOTE: This script and its workflow are written but not yet tested.
# Remove this notice after a successful end-to-end run.

set -e
cd "$(dirname "$0")"

NODES="${1:-}"
if [ -z "$NODES" ] || [ $# -lt 2 ]; then
    echo "Usage: $0 NODES YYYY-MM [YYYY-MM ...]" >&2
    exit 1
fi
shift
MONTHS=("$@")

COMMENTS_DUMPDIR="${COMMENTS_DUMPDIR:-/gscratch/comdata/raw_data/reddit_dumps/comments}"
SUBMISSIONS_DUMPDIR="${SUBMISSIONS_DUMPDIR:-/gscratch/comdata/raw_data/reddit_dumps/submissions}"
PYTHON="${PYTHON:-python3}"

TEMP_COMMENTS="/gscratch/comdata/output/temp/add_months_comments.parquet"
TEMP_SUBMISSIONS="/gscratch/comdata/output/temp/add_months_submissions.parquet"
STAGING_COMMENTS_SUB="/gscratch/comdata/output/temp/new_layer_comments_by_subreddit.parquet"
STAGING_COMMENTS_AUTH="/gscratch/comdata/output/temp/new_layer_comments_by_author.parquet"
STAGING_SUBMISSIONS_SUB="/gscratch/comdata/output/temp/new_layer_submissions_by_subreddit.parquet"
STAGING_SUBMISSIONS_AUTH="/gscratch/comdata/output/temp/new_layer_submissions_by_author.parquet"
LIVE_COMMENTS_SUB="/gscratch/comdata/output/reddit_comments_by_subreddit.parquet"
LIVE_COMMENTS_AUTH="/gscratch/comdata/output/reddit_comments_by_author.parquet"
LIVE_SUBMISSIONS_SUB="/gscratch/comdata/output/reddit_submissions_by_subreddit.parquet"
LIVE_SUBMISSIONS_AUTH="/gscratch/comdata/output/reddit_submissions_by_author.parquet"

# --- Part 1: parse new months in parallel -----------------------------------

printf "$PYTHON comments_part1.py parse_dump RC_%s.zst --dumpdir=\"$COMMENTS_DUMPDIR\" --outdir=\"$TEMP_COMMENTS\"\n" "${MONTHS[@]}" \
    > add_months_comments_tasks.txt

printf "$PYTHON submissions_part1.py parse_dump RS_%s.zst --dumpdir=\"$SUBMISSIONS_DUMPDIR\" --outdir=\"$TEMP_SUBMISSIONS\"\n" "${MONTHS[@]}" \
    > add_months_submissions_tasks.txt

parallel --joblog add_months_comments_joblog.txt --results add_months_comments_logs \
    < add_months_comments_tasks.txt

parallel --joblog add_months_submissions_joblog.txt --results add_months_submissions_logs \
    < add_months_submissions_tasks.txt

# --- Part 2: sort new months into staging (multi-node Spark cluster) --------

start_spark_and_run.sh "$NODES" comments_part2.py \
    --indir="$TEMP_COMMENTS" \
    --out_by_subreddit="$STAGING_COMMENTS_SUB" \
    --out_by_author="$STAGING_COMMENTS_AUTH"

start_spark_and_run.sh "$NODES" submissions_part2.py \
    --indir="$TEMP_SUBMISSIONS" \
    --out_by_subreddit="$STAGING_SUBMISSIONS_SUB" \
    --out_by_author="$STAGING_SUBMISSIONS_AUTH"

# --- Verify staging, then copy and cleanup manually -------------------------
#
# See add_months.sh for verify/copy/cleanup commands — they are identical.

exit 0

find "$STAGING_COMMENTS_SUB"  -maxdepth 1 -type f -exec cp {} "$LIVE_COMMENTS_SUB"/  \;
find "$STAGING_COMMENTS_AUTH" -maxdepth 1 -type f -exec cp {} "$LIVE_COMMENTS_AUTH"/ \;
find "$STAGING_SUBMISSIONS_SUB"  -maxdepth 1 -type f -exec cp {} "$LIVE_SUBMISSIONS_SUB"/  \;
find "$STAGING_SUBMISSIONS_AUTH" -maxdepth 1 -type f -exec cp {} "$LIVE_SUBMISSIONS_AUTH"/ \;

rm -rf "$TEMP_COMMENTS" "$TEMP_SUBMISSIONS"
rm -rf "$STAGING_COMMENTS_SUB" "$STAGING_COMMENTS_AUTH"
rm -rf "$STAGING_SUBMISSIONS_SUB" "$STAGING_SUBMISSIONS_AUTH"