#!/bin/bash
# submit_all_dto.sh
# Submits one SLURM array job per {perturbation}/{binding_source} combination.
#
# Run from the DTO root -- the directory holding index/, dto_lists.sqsh and
# run_dto.sh.
#
# Usage:
#   bash submit_all.sh [--dry-run]
#   bash submit_all.sh --test <pert_db> <binding_db>   # single combo, array=1-5
#   bash submit_all.sh --dry-run --test <pert_db> <binding_db>
#
# The input tree is split in two: index/ holds the per-pair lookup.txt and
# background.csv and is read straight off the filesystem, while the ranked lists
# live in the SquashFS image and are opened by each task (see run_dto.sh). Pairs
# are therefore enumerated from index/, and results are written to a third root
# so nothing lands inside either input tree.
#
# Overridable:
#   DTO_INDEX_ROOT       default <root>/index
#   DTO_RESULTS_ROOT     default <root>/results
#   DTO_INPUT_SQUASHFS   default <root>/dto_lists.sqsh when that file exists;
#                        exported to the tasks, which read the lists from it.
#                        Leave unset only if the lists are unpacked on disk.

set -euo pipefail

DTO_ROOT=$(pwd)
SCRIPT="${DTO_ROOT}/run_dto.sh"

INDEX_ROOT="${DTO_INDEX_ROOT:-${DTO_ROOT}/index}"
RESULTS_ROOT="${DTO_RESULTS_ROOT:-${DTO_ROOT}/results}"

# Default the archive to the one sitting next to this script, and tell the tasks
# which path prefix in lookup.txt it stands in for.
if [[ -z "${DTO_INPUT_SQUASHFS:-}" && -f "${DTO_ROOT}/dto_lists.sqsh" ]]; then
    DTO_INPUT_SQUASHFS="${DTO_ROOT}/dto_lists.sqsh"
fi
export DTO_INPUT_SQUASHFS="${DTO_INPUT_SQUASHFS:-}"
export DTO_INPUT_ROOT="${DTO_INPUT_ROOT:-${DTO_ROOT}/lists}"

DRY_RUN=false
TEST_PERT=""
TEST_BINDING=""

# Parse args
while [[ $# -gt 0 ]]; do
    case "$1" in
        --dry-run) DRY_RUN=true; shift ;;
        --test)
            TEST_PERT="${2:-}"
            TEST_BINDING="${3:-}"
            if [[ -z "$TEST_PERT" || -z "$TEST_BINDING" ]]; then
                echo "Usage: --test <pert> <binding_src>  e.g. --test hackett cc" >&2
                exit 1
            fi
            shift 3
            ;;
        *) echo "Unknown argument: $1" >&2; exit 1 ;;
    esac
done

$DRY_RUN && echo "[dry-run] No jobs will be submitted."
[[ -n "$TEST_PERT" ]] && echo "[test] Single combo: ${TEST_PERT}/${TEST_BINDING}, array=1-5"

if [[ -n "$DTO_INPUT_SQUASHFS" ]]; then
    if [[ ! -f "$DTO_INPUT_SQUASHFS" ]]; then
        echo "ERROR: DTO_INPUT_SQUASHFS does not exist: $DTO_INPUT_SQUASHFS" >&2
        exit 1
    fi
    echo "Ranked lists: ${DTO_INPUT_SQUASHFS} (standing in for ${DTO_INPUT_ROOT})"
else
    echo "Ranked lists: unpacked, read directly from the paths in lookup.txt"
fi
echo "Index:        ${INDEX_ROOT}"
echo "Results:      ${RESULTS_ROOT}"
echo ""

# An unmatched glob would otherwise be passed through literally and counted as a
# skip, so a wrong root reports "Submitted: 0" and exits clean. Fail instead.
shopt -s nullglob
LOOKUPS=("${INDEX_ROOT}"/*/*/lookup.txt)
shopt -u nullglob

if (( ${#LOOKUPS[@]} == 0 )); then
    echo "ERROR: no <pert_db>/<binding_db>/lookup.txt found under ${INDEX_ROOT}" >&2
    echo "       Run from the DTO root, or set DTO_INDEX_ROOT." >&2
    exit 1
fi

submitted=0
skipped=0

for LOOKUP in "${LOOKUPS[@]}"; do
    COMBO_DIR=$(dirname "$LOOKUP")
    BINDING_SRC=$(basename "$COMBO_DIR")
    PERT=$(basename "$(dirname "$COMBO_DIR")")
    # Results go to their own root, mirroring <pert_db>/<binding_db>, so neither
    # input tree is written into: index/ stays exactly what was rsynced, and the
    # ranked lists are read-only inside the image.
    OUTPUT_DIR="${RESULTS_ROOT}/${PERT}/${BINDING_SRC}"
    BACKGROUND="${COMBO_DIR}/background.csv"

    # If --test, skip everything except the requested combo
    if [[ -n "$TEST_PERT" ]]; then
        [[ "$PERT" == "$TEST_PERT" && "$BINDING_SRC" == "$TEST_BINDING" ]] || continue
    fi

    if [[ ! -f "$BACKGROUND" ]]; then
        echo "SKIP: $PERT/$BINDING_SRC — background.csv not found at $BACKGROUND" >&2
        ((skipped++)) || true
        continue
    fi

    N=$(wc -l < "$LOOKUP")
    if [[ "$N" -eq 0 ]]; then
        echo "SKIP: $PERT/$BINDING_SRC — empty lookup" >&2
        ((skipped++)) || true
        continue
    fi

    # In test mode, only run first 5 tasks
    ARRAY_SPEC="1-${N}"
    [[ -n "$TEST_PERT" ]] && ARRAY_SPEC="1-5"

    JOB_NAME="dto_${PERT}_${BINDING_SRC}"
    LOG_DIR="${OUTPUT_DIR}/logs"
    mkdir -p "$LOG_DIR"

    echo "Submitting: $PERT/$BINDING_SRC  (array=${ARRAY_SPEC})"

    if $DRY_RUN; then
        echo "  sbatch --job-name=${JOB_NAME} \\"
        echo "         --array=${ARRAY_SPEC} \\"
        echo "         --output=${LOG_DIR}/dto_%A_%a.out \\"
        echo "         --error=${LOG_DIR}/dto_%A_%a.err \\"
        echo "         ${SCRIPT} ${LOOKUP} ${OUTPUT_DIR} ${BACKGROUND}"
    else
        sbatch \
            --job-name="${JOB_NAME}" \
            --array="${ARRAY_SPEC}" \
            --output="${LOG_DIR}/dto_%A_%a.out" \
            --error="${LOG_DIR}/dto_%A_%a.err" \
            "${SCRIPT}" "${LOOKUP}" "${OUTPUT_DIR}" "${BACKGROUND}"
    fi

    ((submitted++)) || true
done

if [[ -n "$TEST_PERT" && $submitted -eq 0 && $skipped -eq 0 ]]; then
    echo "ERROR: combo ${TEST_PERT}/${TEST_BINDING} not found — check pert and binding_src names" >&2
    exit 1
fi

echo ""
echo "Done. Submitted: ${submitted}  Skipped: ${skipped}"