#!/usr/bin/env bash
# build_multiuser_doe_report.sh — full pipeline: disk -> CSV -> R/SVG -> PDF
#
# Chains: extract_doe_region.py (spool DOE-PERSIST-TRIAL records off
# disk/artemis.img) -> analyse_multiuser_doe.R (tables + SVG charts +
# auto-generated summary fragment) -> svg_to_pdf.py (SVG -> PDF for
# \includegraphics) -> pdflatex (twice, for cross-references) ->
# multiuser_doe_report.pdf.
#
# Safe to re-run at any point, including while a multi-day campaign is
# still executing on a separate QEMU instance: every step is read-only
# with respect to disk/artemis.img, and analyse_multiuser_doe.R degrades
# to a "no data yet" placeholder rather than failing when the DoE region
# has 0 trials so far.
#
# Usage:
#   scripts/build_multiuser_doe_report.sh [--loop] [--csv PATH]
#
#   --loop        Attach disk/artemis.img via losetup instead of reading
#                 the file directly (needs sudo). See extract_doe_region.py.
#   --csv PATH    Skip disk extraction entirely and analyse an existing
#                 CSV instead (e.g. to smoke-test this pipeline against
#                 an old per-tick run CSV, or a CSV saved from a previous
#                 extraction).

set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$REPO_ROOT"

ANALYSIS_DIR="experiments/bare_metal/analysis"
RUNS_DIR="experiments/bare_metal/runs"
REPORT_DIR="$ANALYSIS_DIR/report"
CSV_OUT="$RUNS_DIR/multiuser-doe-trials.csv"

USE_LOOP=0
CSV_OVERRIDE=""

while [ $# -gt 0 ]; do
  case "$1" in
    --loop) USE_LOOP=1; shift ;;
    --csv) CSV_OVERRIDE="$2"; shift 2 ;;
    *) echo "Unknown argument: $1" >&2; exit 1 ;;
  esac
done

echo "=== [1/4] Extracting trial records ==="
if [ -n "$CSV_OVERRIDE" ]; then
  echo "  Using existing CSV: $CSV_OVERRIDE (skipping disk extraction)"
  CSV_OUT="$CSV_OVERRIDE"
elif [ -f disk/artemis.img ]; then
  mkdir -p "$RUNS_DIR"
  if [ "$USE_LOOP" -eq 1 ]; then
    python3 scripts/extract_doe_region.py --img disk/artemis.img --loop -o "$CSV_OUT"
  else
    python3 scripts/extract_doe_region.py --img disk/artemis.img -o "$CSV_OUT"
  fi
else
  echo "  disk/artemis.img not found -- writing an empty CSV so the report" >&2
  echo "  still builds with a 'no data yet' placeholder." >&2
  mkdir -p "$RUNS_DIR"
  echo "isa,run_id,cfg,rep,nw,mode,fail_count,fleet_k_q48,fleet_conserved,switch_count_cumulative" > "$CSV_OUT"
fi

echo ""
echo "=== [2/4] Running R analysis (tables + charts + summary fragment) ==="
Rscript "$ANALYSIS_DIR/analyse_multiuser_doe.R" "$CSV_OUT"

echo ""
echo "=== [3/4] Converting SVG charts to PDF ==="
python3 "$ANALYSIS_DIR/svg_to_pdf.py"

echo ""
echo "=== [4/4] Building PDF report ==="
mkdir -p "$REPORT_DIR/sections"
if [ ! -f "$REPORT_DIR/sections/multiuser_summary_autogen.tex" ]; then
  echo "No trial data has been persisted to the DoE region yet." \
    > "$REPORT_DIR/sections/multiuser_summary_autogen.tex"
fi

cd "$REPORT_DIR"
pdflatex -interaction=nonstopmode -halt-on-error multiuser_doe_report.tex >/tmp/multiuser_doe_report_latex1.log 2>&1 || {
  echo "pdflatex (pass 1) failed -- see /tmp/multiuser_doe_report_latex1.log" >&2
  tail -40 /tmp/multiuser_doe_report_latex1.log >&2
  exit 1
}
pdflatex -interaction=nonstopmode -halt-on-error multiuser_doe_report.tex >/tmp/multiuser_doe_report_latex2.log 2>&1 || {
  echo "pdflatex (pass 2) failed -- see /tmp/multiuser_doe_report_latex2.log" >&2
  tail -40 /tmp/multiuser_doe_report_latex2.log >&2
  exit 1
}
cd "$REPO_ROOT"

echo ""
echo "=== Done ==="
echo "  PDF: $REPORT_DIR/multiuser_doe_report.pdf"