#!/usr/bin/env bash
# deploy.sh  — GitOps deployment for zulip-platform-plugins
#
# Supports two deployment modes:
#   LEGACY:  /opt/hermes-zulip-plugin/  + systemctl restart zulip-plugin
#   NATIVE:  ~/.hermes/plugins/platforms/zulip/  + hermes gateway restart
#
# Usage:
#   ./deploy.sh <tag|branch>                # Deploy all agents (default: native)
#   ./deploy.sh --mode=native v1.0.0        # Hermes native plugin (new)
#   ./deploy.sh --mode=legacy v1.0.0        # Old systemd service (deprecated)
#   ./deploy.sh --ct=tanko v1.0.0           # Single agent
#   ./deploy.sh --dry-run v1.0.0            # Preview only
#
set -euo pipefail

DEPLOY_LOG="deploy.log"
TAG=""
SINGLE_CT=""
DRY_RUN=false
DEPLOY_MODE="native"  # default to new Hermes native plugin

# Parse args
for arg in "$@"; do
  case "$arg" in
    --ct=*) SINGLE_CT="${arg#--ct=}" ;;
    --dry-run) DRY_RUN=true ;;
    --mode=*) DEPLOY_MODE="${arg#--mode=}" ;;
    *) TAG="$arg" ;;
  esac
done

if [[ -z "$TAG" ]]; then
  echo "Usage: $0 <tag|branch> [--ct=<agent>] [--mode=native|legacy] [--dry-run]"
  echo ""
  echo "  --ct=<agent>    Deploy to single agent (tanko, mumuni, etc.)"
  echo "  --mode=native   Hermes native plugin at ~/.hermes/plugins/ (default)"
  echo "  --mode=legacy   Old systemd service at /opt/hermes-zulip-plugin/"
  echo "  --dry-run       Preview deployment without making changes"
  echo ""
  echo "Examples:"
  echo "  ./deploy.sh v1.0.0                    # Deploy native to all agents"
  echo "  ./deploy.sh --ct=tanko v1.0.0         # Deploy native to Tanko only"
  echo "  ./deploy.sh --mode=legacy v0.9.0      # Deploy legacy to all"
  exit 1
fi

if [[ "$DEPLOY_MODE" != "native" && "$DEPLOY_MODE" != "legacy" ]]; then
  echo "ERROR: --mode must be 'native' or 'legacy'"
  exit 1
fi

# ── Agent Registry (must match docs/CONTEXT.md) ──────────────────────
declare -A AGENTS=(
  ["tanko"]="amdpve CT 112"
  ["mumuni"]="minipve CT 114"
  ["koonimo"]="amdpve CT 113"
  ["koby"]="amdpve CT 111"
  ["kagentz"]="amdpve CT 105"
  ["abiba"]="amdpve CT 100"
)

# Native Hermes plugin path (~/.hermes/plugins/platforms/zulip/)
NATIVE_PLUGIN_SRC="plugins/platforms/zulip"

# Legacy paths (DEPRECATED — systemd zulip-plugin service)
declare -A LEGACY_PATHS=(
  ["tanko"]="/opt/hermes-zulip-plugin"
  ["mumuni"]="/opt/hermes-zulip-plugin"
  ["koonimo"]="/opt/hermes-zulip-plugin"
  ["koby"]="/opt/hermes-zulip-plugin"
  ["kagentz"]="/opt/agent-zero-plugin"
  ["abiba"]="/root/.pi/agent/extensions/zulip.ts"
)

# Service names for legacy mode
declare -A LEGACY_SERVICES=(
  ["tanko"]="zulip-plugin"
  ["mumuni"]="zulip-plugin"
  ["koonimo"]="zulip-plugin"
  ["koby"]="zulip-plugin"
  ["kagentz"]="zulip-plugin"
  ["abiba"]="pi"
)

HEALTH_PORT=9200
GITEA_REPO="https://git.sysloggh.net/SyslogSolution/zulip-platform-plugins.git"

log() {
  local prefix=""
  [[ "$DRY_RUN" == "true" ]] && prefix="[DRY-RUN] "
  echo "${prefix}[$(date '+%Y-%m-%d %H:%M:%S')] $*" | tee -a "$DEPLOY_LOG"
}

# ── Deployment Functions ─────────────────────────────────────────────

deploy_native() {
  local agent="$1"
  local plugin_dir="$HOME/.hermes/plugins/platforms/zulip"

  log "📦 Deploying $agent: native Hermes plugin -> $plugin_dir"

  if [[ "$DRY_RUN" == "true" ]]; then
    log "   Would copy $NATIVE_PLUGIN_SRC/{adapter.py,__init__.py,plugin.yaml} -> $plugin_dir/"
    log "   Would run: hermes gateway restart"
    return 0
  fi

  # Create plugin directory
  mkdir -p "$plugin_dir"

  # Copy plugin files
  cp "$NATIVE_PLUGIN_SRC/adapter.py" "$plugin_dir/"
  cp "$NATIVE_PLUGIN_SRC/__init__.py" "$plugin_dir/"
  cp "$NATIVE_PLUGIN_SRC/plugin.yaml" "$plugin_dir/"

  log "   Copied plugin files to $plugin_dir/"
  ls -la "$plugin_dir/"

  # Restart Hermes Gateway to load the plugin
  if command -v hermes &>/dev/null; then
    log "   Restarting Hermes Gateway..."
    hermes gateway restart
    log "   Hermes Gateway restarted"
  else
    log "   ⚠️  'hermes' command not found — manual restart needed"
    log "   Run: hermes gateway restart"
  fi

  # Health check
  log "   Waiting for service to stabilize..."
  sleep 5
  if curl -sf "http://localhost:$HEALTH_PORT/health" > /dev/null 2>&1; then
    log "   ✅ Health check passed (port $HEALTH_PORT)"
  else
    log "   ⚠️  Health check on port $HEALTH_PORT not responding"
    log "   Check Gateway logs for plugin load errors"
  fi

  log "✅ $agent: native deployment complete"
}

deploy_legacy() {
  local agent="$1"
  local plugin_path="${LEGACY_PATHS[$agent]}"
  local service="${LEGACY_SERVICES[$agent]}"

  log "📦 Deploying $agent: LEGACY mode -> $plugin_path"

  if [[ "$DRY_RUN" == "true" ]]; then
    log "   Would git checkout $TAG in $plugin_path"
    log "   Would install deps + restart $service"
    return 0
  fi

  # Git checkout
  if [[ ! -d "$plugin_path" ]]; then
    log "❌ Path $plugin_path not found for $agent"
    return 1
  fi

  cd "$plugin_path"
  git fetch --tags origin
  git checkout "$TAG"

  log "   Checked out $TAG in $plugin_path"

  # Install deps
  if [[ -f "requirements.txt" ]]; then
    pip install -r requirements.txt --quiet
    log "   Dependencies installed"
  fi

  # Restart service
  if systemctl list-units --full -all 2>/dev/null | grep -q "$service"; then
    systemctl restart "$service"
    log "   Restarted $service"
  else
    log "   ⚠️  Service $service not found — manual restart needed"
  fi

  # Health check
  sleep 5
  if curl -sf "http://localhost:$HEALTH_PORT/health" > /dev/null 2>&1; then
    log "   ✅ Health check passed"
  else
    log "   ⚠️  Health check failed — check logs"
  fi

  log "✅ $agent: legacy deployment complete"
}

# ── Verify function ──────────────────────────────────────────────────

verify_deployment() {
  local agent="$1"

  log "🔍 Verifying $agent deployment..."

  if [[ "$DEPLOY_MODE" == "native" ]]; then
    local plugin_dir="$HOME/.hermes/plugins/platforms/zulip"
    if [[ -f "$plugin_dir/adapter.py" && -f "$plugin_dir/plugin.yaml" ]]; then
      log "   ✅ Plugin files present in $plugin_dir"
      log "   adapter.py: $(wc -l < "$plugin_dir/adapter.py") lines"
      log "   plugin.yaml: $(wc -l < "$plugin_dir/plugin.yaml") lines"
    else
      log "   ❌ Plugin files missing in $plugin_dir"
      return 1
    fi
  fi

  log "   ✅ $agent verification complete"
}

# ── Main ─────────────────────────────────────────────────────────────

log "🚀 Deploy started — tag: $TAG, mode: $DEPLOY_MODE, dry-run: $DRY_RUN"

if [[ -n "$SINGLE_CT" ]]; then
  if [[ -z "${AGENTS[$SINGLE_CT]:-}" ]]; then
    log "❌ Unknown agent: $SINGLE_CT"
    log "   Known agents: ${!AGENTS[*]}"
    exit 1
  fi
  log "--- Deploying single agent: $SINGLE_CT ---"
  if [[ "$DEPLOY_MODE" == "native" ]]; then
    deploy_native "$SINGLE_CT"
  else
    deploy_legacy "$SINGLE_CT"
  fi
  verify_deployment "$SINGLE_CT"
else
  FAILED=""
  for agent in "${!AGENTS[@]}"; do
    echo ""
    if [[ "$DEPLOY_MODE" == "native" ]]; then
      if deploy_native "$agent"; then
        verify_deployment "$agent" || FAILED="$FAILED $agent"
      else
        FAILED="$FAILED $agent"
      fi
    else
      if deploy_legacy "$agent"; then
        verify_deployment "$agent" || FAILED="$FAILED $agent"
      else
        FAILED="$FAILED $agent"
      fi
    fi
  done

  echo ""
  log "=== Deploy complete ==="
  if [[ -n "$FAILED" ]]; then
    log "❌ FAILED:$FAILED"
    log "   Run rollback: ./scripts/rollback.sh <previous-tag>"
    exit 1
  fi
  log "✅ All agents deployed successfully."
  log "   Next: monitor #agent-hub for agent responses"
fi