#!/usr/bin/env bash
# Outside-in public HTTPS checks (no SSH).
set -euo pipefail
ROOT=$(cd "$(dirname "$0")" && pwd)
# shellcheck source=lib.sh
source "$ROOT/lib.sh"

# Area www-### — public HTTPS (outside-in)
set_area www
section "www · public URLs · ${TALER_DOMAIN:-?} (outside-in, no SSH)"

tmp=$(mktemp -d)
trap 'rm -rf "$tmp"' EXIT

check_url() {
  local label="$1" expect="$2" url="$3"
  local code
  code=$(http_code "$url")
  case ",$expect," in
    *",$code,"*) ok "$label $url" ;;
    *) fail "$label $url" "got $code want $expect" ;;
  esac
}

# Soft check: OK on expect, WARN on foreign stack if down, ERROR on local stack
check_url_soft() {
  local label="$1" expect="$2" url="$3"
  local code
  code=$(http_code "$url")
  case ",$expect," in
    *",$code,"*) ok "$label $url" ;;
    *)
      if [ "${LOCAL_STACK:-1}" = "0" ]; then
        warn "$label $url" "got $code (optional on remote domain)"
      else
        fail "$label $url" "got $code want $expect"
      fi
      ;;
  esac
}

expect_currency() {
  local label="$1" file="$2" want="${EXPECT_CURRENCY:-}"
  local cur
  cur=$(python3 -c 'import json,sys;print(json.load(open(sys.argv[1])).get("currency",""))' "$file" 2>/dev/null || true)
  if [ -z "$want" ]; then
    info "$label currency" "${cur:-?}"
    return
  fi
  if [ "$cur" = "$want" ]; then
    ok "$label currency=$want"
  else
    fail "$label currency" "got ${cur:-?} want $want"
  fi
}

# Legal docs: /terms and /privacy must be HTTP 200 with a real document body
# (not empty, not "not configured", not JSON API error).
# $1=label $2=url $3=optional needle regex (case-insensitive) for local stack
check_legal_doc() {
  local label="$1" url="$2" needle="${3:-}"
  local f code soft
  soft=0
  [ "${LOCAL_STACK:-1}" = "0" ] && soft=1
  f=$(mktemp)
  code=$(curl -skS --max-redirs 5 -L -m "${TIMEOUT}" \
    -H "Accept: text/html,text/markdown,text/plain,*/*" \
    -o "$f" -w '%{http_code}' "$url" 2>/dev/null || echo 000)
  if [ "$code" != "200" ]; then
    rm -f "$f"
    if [ "$soft" = "1" ]; then
      warn "$label" "HTTP $code — $url"
    else
      fail "$label" "HTTP $code — $url"
    fi
    return
  fi
  if [ ! -s "$f" ]; then
    rm -f "$f"
    fail "$label" "empty body — $url"
    return
  fi
  # merchant returns plain "not configured" when PRIVACY_ETAG missing
  if grep -qiE '^(not configured)\s*$' "$f" 2>/dev/null \
    || grep -qiE '"code"\s*:\s*21' "$f" 2>/dev/null; then
    rm -f "$f"
    fail "$label" "not configured / API error — $url"
    return
  fi
  if [ -n "$needle" ] && [ "${LOCAL_STACK:-1}" = "1" ]; then
    if ! grep -qiE "$needle" "$f" 2>/dev/null; then
      warn "$label content" "missing /$needle/ — $url"
      rm -f "$f"
      return
    fi
  fi
  ok "$label" "HTTP 200 · $(wc -c <"$f" | tr -d ' ') bytes"
  rm -f "$f"
}

# --- exchange (core; always required) ---  www-001 …
check_url "exchange /config" 200 "$EXCHANGE_PUBLIC/config"
code=$(http_body "$EXCHANGE_PUBLIC/config" "$tmp/ec.json")
if [ "$code" = "200" ]; then
  expect_currency "exchange" "$tmp/ec.json"
  # currency_specification.alt_unit_names (wallet codec)
  if json_has_alt_unit_names "$tmp/ec.json" "${EXPECT_CURRENCY:-}" >/tmp/alt-ex.$$ 2>&1; then
    ok "exchange /config alt_unit_names" "$(tr '\n' '; ' </tmp/alt-ex.$$ | sed 's/; $//')"
  else
    fail "exchange /config alt_unit_names" "$(tr '\n' '; ' </tmp/alt-ex.$$ | sed 's/; $//')"
  fi
  rm -f /tmp/alt-ex.$$
fi
check_url "exchange /keys" 200 "$EXCHANGE_PUBLIC/keys"
# /keys should also expose currency_specification.alt_unit_names when present
code=$(http_body "$EXCHANGE_PUBLIC/keys" "$tmp/ek.json")
if [ "$code" = "200" ]; then
  if python3 - "$tmp/ek.json" <<'PY'
import json,sys
d=json.load(open(sys.argv[1]))
cs=d.get("currency_specification") or {}
au=cs.get("alt_unit_names") if isinstance(cs,dict) else None
if not isinstance(au, dict) or "0" not in au:
    # older keys without embedded spec: not a hard fail if /config is good
    sys.exit(2)
sys.exit(0)
PY
  then
    ok "exchange /keys alt_unit_names"
  else
    ec=$?
    if [ "$ec" = "2" ]; then
      warn "exchange /keys alt_unit_names" "no currency_specification in /keys (ok if /config has it)"
    else
      fail "exchange /keys alt_unit_names"
    fi
  fi
fi
check_url_soft "exchange /intro/" 200 "$EXCHANGE_PUBLIC/intro/"
# Root should land on intro (302/301 then 200 on follow is checked separately)
check_url_soft "exchange /" 302,301,200 "$EXCHANGE_PUBLIC/"

# Terms + privacy (legal docs)
check_legal_doc "exchange /terms" "$EXCHANGE_PUBLIC/terms" "terms|GOA|exploration|FADP|revDSG|privacy"
check_legal_doc "exchange /privacy" "$EXCHANGE_PUBLIC/privacy" "privacy|FADP|revDSG|data|GOA|exploration"
# trailing slash: 200 or redirect to bare path
code=$(http_code "$EXCHANGE_PUBLIC/terms/")
case "$code" in
  200|301|302) ok "exchange /terms/" "HTTP $code" ;;
  *)
    if [ "${LOCAL_STACK:-1}" = "1" ]; then warn "exchange /terms/" "HTTP $code"
    else warn "exchange /terms/" "HTTP $code"
    fi
    ;;
esac

# --- bank ---
if [ "${LOCAL_STACK:-1}" = "0" ]; then
  check_url_soft "bank /config" 200 "$BANK_PUBLIC/config"
else
  check_url "bank /config" 200 "$BANK_PUBLIC/config"
fi
code=$(http_body "$BANK_PUBLIC/config" "$tmp/bc.json")
if [ "$code" = "200" ]; then
  expect_currency "bank" "$tmp/bc.json"
  if json_has_alt_unit_names "$tmp/bc.json" >/tmp/alt-bank.$$ 2>&1; then
    ok "bank /config alt_unit_names" "$(tr '\n' '; ' </tmp/alt-bank.$$ | sed 's/; $//')"
  else
    fail "bank /config alt_unit_names" "$(tr '\n' '; ' </tmp/alt-bank.$$ | sed 's/; $//')"
  fi
  rm -f /tmp/alt-bank.$$
  check_url_soft "bank /taler-integration/config" 200 "$BANK_PUBLIC/taler-integration/config"
  check_url_soft "bank /webui/" 200 "$BANK_PUBLIC/webui/"
  check_url_soft "bank /intro/" 200 "$BANK_PUBLIC/intro/"
  check_url_soft "bank /" 302,301,200 "$BANK_PUBLIC/"
fi

# Bank legal docs (landing nginx via Caddy /terms* /privacy* or /intro/*)
check_legal_doc "bank /terms" "$BANK_PUBLIC/terms" "terms|GOA|exploration|bank|FADP|revDSG"
# Prefer /privacy; fall back to /intro/privacy.html for older deploys
code=$(http_code "$BANK_PUBLIC/privacy")
if [ "$code" = "200" ]; then
  check_legal_doc "bank /privacy" "$BANK_PUBLIC/privacy" "privacy|FADP|revDSG|data|GOA|bank"
else
  if [ "${LOCAL_STACK:-1}" = "1" ]; then
    check_legal_doc "bank /privacy (or /intro/privacy.html)" \
      "$BANK_PUBLIC/intro/privacy.html" "privacy|FADP|revDSG|data|GOA|bank"
    # still report bare /privacy failure for local
    warn "bank /privacy" "HTTP $code — prefer Caddy handle /privacy* → landing"
  else
    check_url_soft "bank /privacy" 200 "$BANK_PUBLIC/privacy"
  fi
fi

# --- merchant ---
if [ "${LOCAL_STACK:-1}" = "0" ]; then
  check_url_soft "merchant /config" 200 "$MERCHANT_PUBLIC/config"
else
  check_url "merchant /config" 200 "$MERCHANT_PUBLIC/config"
fi
code=$(http_body "$MERCHANT_PUBLIC/config" "$tmp/mc.json")
if [ "$code" = "200" ]; then
  want="${EXPECT_CURRENCY:-}"
  if python3 - "$tmp/mc.json" "$want" <<'PY'
import json,sys
try:
    d=json.load(open(sys.argv[1]))
except Exception:
    sys.exit(2)
want=sys.argv[2]
if not want:
    sys.exit(0)
curs=list((d.get("currencies") or {}).keys())
ex=d.get("exchanges") or []
ok = want in curs or any((e.get("currency") if isinstance(e,dict) else None)==want for e in ex)
if not ok and isinstance(d.get("currency"), str):
    ok = d["currency"]==want
sys.exit(0 if ok else 1)
PY
  then
    ok "merchant /config (${want:-currency} ok)"
  else
    ec=$?
    if [ "$ec" = "2" ]; then
      warn "merchant /config" "non-JSON body"
    elif [ -n "$want" ]; then
      fail "merchant /config currency" "want $want"
    else
      info "merchant /config" "ok"
    fi
  fi
  # merchant-local currency maps (GOA + CHF, …)
  if json_has_alt_unit_names "$tmp/mc.json" >/tmp/alt-mer.$$ 2>&1; then
    ok "merchant /config currencies alt_unit_names" "$(tr '\n' '; ' </tmp/alt-mer.$$ | sed 's/; $//')"
  else
    fail "merchant /config currencies alt_unit_names" "$(tr '\n' '; ' </tmp/alt-mer.$$ | sed 's/; $//')"
  fi
  rm -f /tmp/alt-mer.$$
  # Follow each exchange listed in merchant /config and require its /config alt_unit_names
  check_merchant_listed_exchanges_alt_units "$tmp/mc.json"
  check_url_soft "merchant /intro/" 200 "$MERCHANT_PUBLIC/intro/"
  check_url_soft "merchant /webui/" 200 "$MERCHANT_PUBLIC/webui/"
  check_url_soft "merchant /" 302,301,200 "$MERCHANT_PUBLIC/"
fi

# Merchant legal docs
check_legal_doc "merchant /terms" "$MERCHANT_PUBLIC/terms" "terms|dual|GOA|CHF|explorational|merchant"
check_legal_doc "merchant /privacy" "$MERCHANT_PUBLIC/privacy" "privacy|FADP|revDSG|data|GOA|CHF|merchant"
code=$(http_code "$MERCHANT_PUBLIC/terms/")
case "$code" in
  200|301|302) ok "merchant /terms/" "HTTP $code" ;;
  *) warn "merchant /terms/" "HTTP $code (expect 302 → /terms)" ;;
esac

summary