#!/usr/bin/env bash
#
# End-to-end re-render of the dashboard demo video.
#
# Defaults assume you run from inside this repo's vscode-server container
# (where host.docker.internal reaches the docker-compose stack). Override
# any URL/credential via env vars at the top.
#
# Usage:
#   ./render.sh                # full pipeline (uses cached auth.json if fresh)
#   ./render.sh --fresh-auth   # force re-auth even if auth.json exists
#   ./render.sh --no-encode    # stop at WebM, skip MP4 encode
#   FORCE_AUTH=1 ./render.sh   # same as --fresh-auth
#   APP_URL=http://localhost:3001 ./render.sh   # override frontend URL

set -euo pipefail

# -- config (override via env) -------------------------------------------------
APP_URL="${APP_URL:-http://host.docker.internal:3001}"
PB_URL="${PB_URL:-http://host.docker.internal:8090}"
API_URL="${API_URL:-http://host.docker.internal:8001}"
PB_EMAIL="${PB_EMAIL:-demo-video@local.test}"
PB_PASSWORD="${PB_PASSWORD:-DemoVideoPass123!}"
MAX_DURATION_S="${MAX_DURATION_S:-15}"
AUTH_TTL_HOURS="${AUTH_TTL_HOURS:-24}"  # re-auth if auth.json older than this

FRESH_AUTH="${FORCE_AUTH:-0}"
DO_ENCODE=1
for arg in "$@"; do
  case "$arg" in
    --fresh-auth) FRESH_AUTH=1 ;;
    --no-encode) DO_ENCODE=0 ;;
    -h|--help)
      sed -n '3,18p' "$0"
      exit 0 ;;
    *) echo "Unknown arg: $arg" >&2; exit 2 ;;
  esac
done

cd "$(dirname "$0")"

# -- helpers ------------------------------------------------------------------
say()  { printf '\n[render] %s\n' "$*"; }
fail() { printf '\n[render] FAIL: %s\n' "$*" >&2; exit 1; }

http_code() {
  curl -s -o /dev/null -w "%{http_code}" --connect-timeout 3 --max-time 5 "$1" || echo "000"
}

wait_for() {
  local url="$1" desc="$2" timeout="${3:-90}"
  say "Waiting for $desc ($url)"
  for i in $(seq 1 "$timeout"); do
    if [ "$(http_code "$url")" = "200" ]; then
      say "  ready after ${i}s"
      return 0
    fi
    sleep 1
  done
  fail "$desc not reachable after ${timeout}s"
}

# -- stack health -------------------------------------------------------------
say "Checking stack health"
fe_code="$(http_code "$APP_URL/")"
api_code="$(http_code "$API_URL/api/features")"
pb_code="$(http_code "$PB_URL/api/health")"
echo "  frontend=$fe_code  api=$api_code  pocketbase=$pb_code"

if [ "$fe_code" != "200" ] || [ "$pb_code" != "200" ]; then
  fail "Stack down. From the repo root run: docker compose up -d"
fi
if [ "$api_code" != "200" ]; then
  wait_for "$API_URL/api/features" "Rust API" 120
fi

# -- node deps ----------------------------------------------------------------
if [ ! -d node_modules ]; then
  say "Installing npm deps"
  npm install --no-audit --no-fund
fi

# Chromium binary lives in Playwright's cache; install if missing.
if ! npx --no-install playwright --version >/dev/null 2>&1 \
   || [ ! -d "$HOME/.cache/ms-playwright" ] \
   || ! find "$HOME/.cache/ms-playwright" -maxdepth 1 -name "chromium-*" -print -quit | grep -q .; then
  say "Installing Playwright Chromium"
  npx playwright install chromium
fi

# -- build --------------------------------------------------------------------
say "Compiling TypeScript"
./node_modules/.bin/tsc

# -- auth ---------------------------------------------------------------------
need_auth=0
if [ "$FRESH_AUTH" = "1" ] || [ ! -f auth.json ]; then
  need_auth=1
else
  # File mtime check, portable: if older than TTL, refresh.
  if [ "$(find auth.json -mmin "+$((AUTH_TTL_HOURS * 60))" -print 2>/dev/null)" ]; then
    say "auth.json is older than ${AUTH_TTL_HOURS}h, will refresh"
    need_auth=1
  fi
fi

if [ "$need_auth" = "1" ]; then
  say "Minting fresh auth.json (user: $PB_EMAIL)"
  PB_URL="$PB_URL" PB_EMAIL="$PB_EMAIL" PB_PASSWORD="$PB_PASSWORD" \
    APP_URL="$APP_URL" \
    node dist/auth.js
else
  say "Reusing existing auth.json"
fi

# -- record -------------------------------------------------------------------
say "Recording"
mkdir -p output
# Wipe last run's leaking artifacts so the rename step picks up *this* run.
rm -f output/recording.webm output/recording.mp4 output/page@*.webm output/page@*.webm.untrimmed

APP_URL="$APP_URL" MAX_DURATION_S="$MAX_DURATION_S" node dist/record.js

if [ ! -s output/recording.webm ]; then
  fail "recording.webm missing or empty"
fi

# -- encode -------------------------------------------------------------------
if [ "$DO_ENCODE" = "1" ]; then
  if ! command -v ffmpeg >/dev/null 2>&1; then
    fail "ffmpeg not on PATH; rerun with --no-encode if you only need the WebM"
  fi
  say "Encoding to MP4"
  ffmpeg -y -loglevel warning -i output/recording.webm \
    -c:v libx264 -pix_fmt yuv420p -crf 18 -movflags +faststart \
    output/recording.mp4
fi

# -- report -------------------------------------------------------------------
say "Done"
if command -v ffprobe >/dev/null 2>&1; then
  for f in output/recording.webm output/recording.mp4; do
    [ -f "$f" ] || continue
    dur=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$f")
    size=$(stat -c '%s' "$f" 2>/dev/null || stat -f '%z' "$f")
    printf '  %s  %ss  %s bytes\n' "$f" "$(printf '%.2f' "$dur")" "$size"
  done
else
  ls -la output/recording.* 2>/dev/null || true
fi