#!/usr/bin/env bash
# check-env.sh — Verify the deployment environment for Linear Void.
# Mirrors scripts/check-env.ps1.
#
# Checks, against the target Docker host (default test lab 192.168.88.40):
#   1. Docker Engine reachability over the TCP socket (port 2375).
#   2. Coolify helper stack (proxy/Traefik, sentinel, cloudflared).
#   3. Linear Void containers (playout, chat, nginx, redis, db, prometheus, grafana).
#   4. Public endpoints (app, HLS manifest, admin).
#   5. Health endpoints exposed by the services.
#
# Usage:
#   ./scripts/check-env.sh
#   ./scripts/check-env.sh -t 192.168.88.40
#   ./scripts/check-env.sh -t 192.168.88.40 -p 2375 --only-containers
#
# Exit code is 0 when all required checks pass, 1 otherwise.
set -uo pipefail

TARGET=192.168.88.40
DOCKER_PORT=2375
ONLY_CONTAINERS=0
ONLY_ENDPOINTS=0
TIMEOUT=10

while [[ $# -gt 0 ]]; do
  case "$1" in
    -t|--target)   TARGET="$2"; shift 2;;
    -p|--docker-port) DOCKER_PORT="$2"; shift 2;;
    --only-containers) ONLY_CONTAINERS=1; shift;;
    --only-endpoints)  ONLY_ENDPOINTS=1; shift;;
    --timeout)     TIMEOUT="$2"; shift 2;;
    *) echo "Unknown option: $1" >&2; exit 2;;
  esac
done

export DOCKER_HOST="tcp://${TARGET}:${DOCKER_PORT}"

FAILED=0
fail() { printf '  [FAIL] %s\n' "$1"; FAILED=1; }
ok()   { printf '  [OK]   %s\n' "$1"; }
warn() { printf '  [WARN] %s\n' "$1"; }

echo "== Linear Void environment check =="
echo "Target Docker host : $DOCKER_HOST"
echo "Date               : $(date -Iseconds)"

# ---------------------------------------------------------------------------
# 1. Docker Engine reachability
# ---------------------------------------------------------------------------
if [[ "$ONLY_ENDPOINTS" -eq 0 ]]; then
  echo ""
  echo "-- Docker Engine (${TARGET}:${DOCKER_PORT}) --"
  if ver=$(docker version --format '{{.Server.Version}}' 2>&1) && [[ "$ver" =~ [0-9] ]]; then
    ok "Docker Engine reachable (server version $ver)"
  else
    fail "Docker Engine not reachable: $ver"
  fi

  # -------------------------------------------------------------------------
  # 2. Coolify helper stack
  # -------------------------------------------------------------------------
  echo ""
  echo "-- Coolify managed-server helpers --"
  for c in coolify-proxy coolify-sentinel coolify-cloudflared; do
    if state=$(docker inspect "$c" --format '{{.State.Status}} ({{.State.Health.Status}})' 2>/dev/null); then
      if [[ "$state" =~ running.*(healthy|running) ]]; then ok "coolify helper: $c -> $state"; else warn "coolify helper: $c -> $state"; fi
    else
      warn "coolify helper: $c -> NOT FOUND (is this a Coolify-managed server?)"
    fi
  done

  # -------------------------------------------------------------------------
  # 3. Linear Void containers
  # -------------------------------------------------------------------------
  echo ""
  echo "-- Linear Void containers --"
  required=(linearvoid-playout linearvoid-chat linearvoid-nginx linearvoid-redis linearvoid-db linearvoid-prometheus linearvoid-grafana)
  running="$(docker ps --format '{{.Names}}' 2>/dev/null)"
  all="$(docker ps -a --format '{{.Names}}\t{{.Status}}' 2>/dev/null)"
  for name in "${required[@]}"; do
    if grep -qx "$name" <<<"$running"; then
      ok "container: $name is running"
    elif grep -q "^$name[[:space:]]" <<<"$all"; then
      status="$(grep "^$name[[:space:]]" <<<"$all" | head -1)"
      fail "container: $name EXISTS but not running -> $status"
    else
      fail "container: $name MISSING"
    fi
  done
fi

# ---------------------------------------------------------------------------
# 4. Health endpoints (via Docker host)
# ---------------------------------------------------------------------------
if [[ "$ONLY_CONTAINERS" -eq 0 ]]; then
  echo ""
  echo "-- Health endpoints --"
  checks=(
    "chat /health|http://${TARGET}:3000/health"
    "nginx /health|http://${TARGET}:8081/health"
    "prometheus|http://${TARGET}:9090/-/healthy"
    "grafana /api/health|http://${TARGET}:3001/api/health"
  )
  for entry in "${checks[@]}"; do
    name="${entry%%|*}"; url="${entry#*|}"
    code=$(curl -s -o /dev/null -w '%{http_code}' --max-time "$TIMEOUT" "$url" 2>/dev/null)
    if [[ "$code" == "200" ]]; then ok "$name -> 200"; elif [[ "$code" =~ ^[0-9]{3}$ ]]; then warn "$name -> $code"; else fail "$name -> unreachable"; fi
  done

  # -------------------------------------------------------------------------
  # 5. Public endpoints (routed through the Docker host for reliable TLS)
  # -------------------------------------------------------------------------
  echo ""
  echo "-- Public endpoints (via Docker host) --"
  pub=(
    "linearvoid.tv app|https://linearvoid.tv/"
    "media HLS manifest|https://media.linearvoid.tv/hls/playlist.m3u8"
    "coolify dashboard|https://coolify.allucanget.biz/"
  )
  for entry in "${pub[@]}"; do
    name="${entry%%|*}"; url="${entry#*|}"
    code=$(docker run --rm curlimages/curl:latest -sS -o /dev/null -w '%{http_code}' --max-time "$TIMEOUT" -L "$url" 2>/dev/null | tr -d '[:space:]')
    if [[ "$code" =~ ^[0-9]{3}$ ]]; then ok "$name -> HTTP $code"; else warn "$name -> $code"; fi
  done
fi

# ---------------------------------------------------------------------------
echo ""
if [[ "$FAILED" -ne 0 ]]; then echo "RESULT: FAILED"; exit 1; fi
echo "RESULT: OK"
exit 0