#!/usr/bin/env bash
# deploy.sh — Deploy the vllmScripts repo to a target and restart its service.
#
# This script implements the second half of the git deployment workflow from
# AGENTS.md. It assumes the local changes are committed and pushed, then:
#   1. Pulls the repo on the target
#   2. Installs / enables the systemd unit
#   3. Reloads systemd and restarts the service
#   4. Waits for the health endpoint and reports status
#
# Usage:
#   ./deploy.sh <target> [--dry-run]
#
# Targets:
#   dankclaw   - vLLM-ROCm server (frank-default-large.service, port 7770)
#   dankserver - vLLM server (vllm-awq-qwen36.service, port 34401)
#
# Example:
#   ./deploy.sh dankclaw
#   ./deploy.sh dankserver --dry-run
set -euo pipefail

# ---------------------------------------------------------------------------
# Target configuration
# ---------------------------------------------------------------------------
declare -A REMOTE_USER REMOTE_HOST REMOTE_DIR SERVICE SERVICE_HEALTH

REMOTE_USER[dankclaw]=dank
REMOTE_HOST[dankclaw]=dankclaw
REMOTE_DIR[dankclaw]="/home/dank/vllmScripts"
SERVICE[dankclaw]="frank-default-large"
SERVICE_HEALTH[dankclaw]="http://127.0.0.1:7770/health"

REMOTE_USER[dankserver]=dank
REMOTE_HOST[dankserver]=dankserver
REMOTE_DIR[dankserver]="/home/dank/vLLM"
SERVICE[dankserver]="vllm-awq-qwen36"
SERVICE_HEALTH[dankserver]="http://127.0.0.1:34401/health"

TARGET="${1:-}"
DRY_RUN=0
if [ "${2:-}" = "--dry-run" ]; then
    DRY_RUN=1
fi

# ---------------------------------------------------------------------------
# Validation
# ---------------------------------------------------------------------------
if [ -z "${TARGET:-}" ]; then
    echo "Usage: $0 <dankclaw|dankserver> [--dry-run]"
    exit 1
fi
if [ -z "${REMOTE_HOST[$TARGET]:-}" ]; then
    echo "Unknown target: $TARGET"
    exit 1
fi

# ---------------------------------------------------------------------------
# Local checks (pre-flight)
# ---------------------------------------------------------------------------
cd "$(dirname "$0")/.."
if ! git diff --quiet HEAD; then
    echo "FAIL: Local working tree has uncommitted changes."
    echo "Commit or stash them before deploying."
    exit 1
fi
if [ "$(git rev-parse --abbrev-ref HEAD)" != "main" ]; then
    echo "WARN: Not on 'main'; deploying a non-main branch."
fi

echo "=== Deploying to ${TARGET} ==="
echo "  host:    ${REMOTE_HOST[$TARGET]}"
echo "  dir:     ${REMOTE_DIR[$TARGET]}"
echo "  service: ${SERVICE[$TARGET]}"
echo "  health:  ${SERVICE_HEALTH[$TARGET]}"
echo ""

# ---------------------------------------------------------------------------
# Push (unless dry-run)
# ---------------------------------------------------------------------------
if [ "$DRY_RUN" = "1" ]; then
    echo "[dry-run] Would push local main to origin"
    echo "[dry-run] Would SSH to ${REMOTE_HOST[$TARGET]} and git pull"
else
    echo "[1/4] Pushing local main to origin..."
    git push origin main
fi

REMOTE="$(
    printf '%s@%s' "${REMOTE_USER[$TARGET]}" "${REMOTE_HOST[$TARGET]}"
)"

# ---------------------------------------------------------------------------
# Remote: pull + install + restart
# ---------------------------------------------------------------------------
REMOTE_SCRIPT="
set -euo pipefail
cd '${REMOTE_DIR[$TARGET]}'

echo '[2/4] Pulling repo on ${TARGET}...'
git pull origin main

# Install / symlink the systemd unit
case '${TARGET}' in
  dankclaw)
    sudo ln -sf '${REMOTE_DIR[$TARGET]}/scripts/frank-default-large.service' /etc/systemd/system/frank-default-large.service
    ;;
  dankserver)
    # vllm-qwen36.service is a physical file; no symlink needed.
    :
    ;;
esac

echo '[3/4] Reload and restart ${SERVICE[$TARGET]}...'
sudo systemctl daemon-reload
sudo systemctl enable '${SERVICE[$TARGET]}'
sudo systemctl restart '${SERVICE[$TARGET]}'
"

if [ "$DRY_RUN" = "1" ]; then
    echo "[dry-run] Remote commands would run:"
    echo "$REMOTE_SCRIPT"
else
    ssh "$REMOTE" "bash -c '$REMOTE_SCRIPT'"
fi

# ---------------------------------------------------------------------------
# Health check
# ---------------------------------------------------------------------------
if [ "$DRY_RUN" = "1" ]; then
    echo "[dry-run] Would wait for health at ${SERVICE_HEALTH[$TARGET]}"
else
    echo "[4/4] Waiting for health endpoint ${SERVICE_HEALTH[$TARGET]}..."
    HEALTH_URL="${SERVICE_HEALTH[$TARGET]}"
    for i in $(seq 1 300); do
        if curl -sf "$HEALTH_URL" > /dev/null 2>&1; then
            echo "  Service healthy after approx $((i * 2))s"
            echo ""
            echo "=== Deploy complete: ${TARGET} ==="
            exit 0
        fi
        sleep 2
    done
    echo "FAIL: Service did not become healthy in 600s"
    exit 1
fi