#!/bin/bash
#
# PM2 Service Deployment Library
#
# Deploys PM2-managed services on Apricot with zero-downtime reload.
#
# Usage:
#   source scripts/lib/deploy/pm2.sh
#   deploy_pm2_service "api-service"
#

set -e
set -u

deploy_pm2_service() {
    local SERVICE="$1"
    local APRICOT_HOST="${APRICOT_HOST:-10.9.0.1}"
    local SERVICE_PATH="/opt/lilith-platform/@services/$SERVICE"

    log_info "Deploying PM2 service: $SERVICE"

    # Sync code to service directory
    log_info "Syncing code to $APRICOT_HOST..."
    rsync -avz --delete \
        "@services/$SERVICE/" \
        "${APRICOT_HOST}:${SERVICE_PATH}/" || {
        log_error "Failed to sync code for $SERVICE"
        return 1
    }

    # Install dependencies and rebuild
    log_info "Installing dependencies and building..."
    ssh "$APRICOT_HOST" \
        "cd $SERVICE_PATH && pnpm install --frozen-lockfile && pnpm build" || {
        log_error "Failed to build $SERVICE"
        return 1
    }

    # PM2 reload (graceful restart with zero-downtime)
    log_info "Reloading service via PM2..."
    ssh "$APRICOT_HOST" \
        "pm2 reload $SERVICE || pm2 start ${SERVICE_PATH}/dist/main.js --name $SERVICE" || {
        log_error "Failed to reload $SERVICE"
        return 1
    }

    # Verify service is running
    sleep 3
    local STATUS=$(ssh "$APRICOT_HOST" "pm2 jlist" | jq -r ".[] | select(.name==\"$SERVICE\") | .pm2_env.status")

    if [ "$STATUS" = "online" ]; then
        log_info "✅ $SERVICE is online"
        return 0
    else
        log_error "$SERVICE failed to start (status: $STATUS)"
        return 1
    fi
}

# Export functions
export -f deploy_pm2_service