#!/usr/bin/env bash
# Bring-up runs of nisse-review on this development VM (Development Plan M7.3).
#
# It runs from the exported code under test, in a virtualenv of its own, as a
# transient systemd unit, so it outlives the shell that started it. It runs
# from its image after M7.6, and on the agent host after M7.7.
#
#   scripts/review-bringup.sh start [REF]   export REF (default HEAD), install
#                                           it, and start the reviewer
#   scripts/review-bringup.sh stop          stop it cleanly (SIGTERM)
#   scripts/review-bringup.sh status        the unit, and its items
#   scripts/review-bringup.sh logs          follow its log
#
# Layout, under $REVIEW (default /root/nisse-review):
#   nisse-review.yaml, .env   the config and its secrets (made by hand once)
#   code/, venv/              the exported code and its install
#   state.db, scratch/        its state, and repository trees while reviewing
#   vault/                    its memory (memory/nisse-review)
set -euo pipefail

REVIEW=${NISSE_REVIEW:-/root/nisse-review}
SRC=${NISSE_SRC:-/root/nisse}
UNIT=nisse-review-bringup
export PATH="$HOME/.local/bin:$PATH"

die() { echo "review-bringup: $*" >&2; exit 1; }
running() { systemctl is-active --quiet "$UNIT"; }

cmd_start() {
    local ref=${1:-HEAD} sha
    [ -f "$REVIEW/nisse-review.yaml" ] && [ -f "$REVIEW/.env" ] || die "no config in $REVIEW"
    running && die "already running; stop it first"
    sha=$(git -C "$SRC" rev-parse --verify "$ref^{commit}") || die "unknown ref $ref"
    rm -rf "$REVIEW/code" && mkdir -p "$REVIEW/code" "$REVIEW/vault/memory/nisse-review"
    git -C "$SRC" archive "$sha" | tar -x -C "$REVIEW/code"
    UV_PROJECT_ENVIRONMENT="$REVIEW/venv" uv sync -q --frozen --no-dev \
        --package nisse-review --no-editable --project "$REVIEW/code"
    echo "$sha" > "$REVIEW/run-info"
    systemd-run --unit="$UNIT" --collect \
        -p WorkingDirectory="$REVIEW" \
        -E NISSE_CONFIG="$REVIEW/nisse-review.yaml" -E NISSE_ENV="$REVIEW/.env" \
        "$REVIEW/venv/bin/nisse-review"
    echo "started $UNIT at $sha"
}

cmd_stop() { running && systemctl stop "$UNIT" || echo "not running"; }

cmd_status() {
    systemctl status "$UNIT" --no-pager || true
    [ -f "$REVIEW/state.db" ] && sqlite3 "$REVIEW/state.db" \
        "SELECT id, position, status, outcome FROM work_items ORDER BY opened_at"
}

cmd_logs() { journalctl -u "$UNIT" -f; }

case "${1:-}" in
    start) shift; cmd_start "$@" ;;
    stop) cmd_stop ;;
    status) cmd_status ;;
    logs) cmd_logs ;;
    *) die "usage: $0 start [REF] | stop | status | logs" ;;
esac