#!/usr/bin/env bash
# Apply hacktivism branding to Castopod (official settings + optional CSS overlay).
#
# Official docs (instance settings — site name/description/icon + 6 accent themes):
#   https://docs.castopod.org/main/en/user-guide/instance/settings/
# Docker/compose background:
#   https://docs.castopod.org/main/en/getting-started/docker/
#
# Logo: same magician mark as git.hacktivism.ch / bonfire.hacktivism.ch
#   (configs/castopod/assets/img/logo.png — ≥512×512 required by Castopod).
# Official accent closest to gold: "amber" (among pine/crimson/lake/amber/jacaranda/onyx).
# Optional warm-dark CSS: NOT official — see configs/castopod/assets/css/theme-hacktivism-overlay.css
set -euo pipefail

ROOT="${KOOPA_CASTOPOD_ROOT:-$HOME/koopa-castopod}"
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/../.." 2>/dev/null && pwd || true)"
# shellcheck source=lib.sh
source "${SCRIPT_DIR}/lib.sh"

: "${CP_BASEURL:=https://castopod.hacktivism.ch}"
: "${CP_ADMIN_GATEWAY:=cp-admin}"
: "${CP_SITE_NAME:=hacktivism castopod}"
: "${CP_SITE_DESCRIPTION:=Castopod on hacktivism.ch — FOSS Airwaves and free-culture podcasting.}"
: "${CP_THEME:=amber}"
: "${CP_APPLY_OVERLAY:=1}"

BRANDING_DST="${ROOT}/branding"
ICON_SRC=""
CSS_SRC=""

if [[ -d "${REPO_ROOT}/configs/castopod/assets/img" ]]; then
  ICON_SRC="${REPO_ROOT}/configs/castopod/assets/img/logo.png"
  CSS_SRC="${REPO_ROOT}/configs/castopod/assets/css/theme-hacktivism-overlay.css"
elif [[ -f "${ROOT}/branding/logo.png" ]]; then
  ICON_SRC="${ROOT}/branding/logo.png"
  CSS_SRC="${ROOT}/branding/theme-hacktivism-overlay.css"
else
  echo "missing logo.png (run from koopa-admin-log checkout or copy assets to ${ROOT}/branding/)" >&2
  exit 1
fi

install -d -m 755 "${BRANDING_DST}"
if [[ "$(realpath "${ICON_SRC}" 2>/dev/null || echo "${ICON_SRC}")" != "$(realpath "${BRANDING_DST}/logo.png" 2>/dev/null || echo "${BRANDING_DST}/logo.png")" ]]; then
  install -m 644 "${ICON_SRC}" "${BRANDING_DST}/logo.png"
fi
if [[ -n "${CSS_SRC}" && -f "${CSS_SRC}" ]]; then
  if [[ "$(realpath "${CSS_SRC}" 2>/dev/null || echo "${CSS_SRC}")" != "$(realpath "${BRANDING_DST}/theme-hacktivism-overlay.css" 2>/dev/null || true)" ]]; then
    install -m 644 "${CSS_SRC}" "${BRANDING_DST}/theme-hacktivism-overlay.css"
  fi
fi

# Mount overlay into public assets if compose branding volume is present
if [[ -d "${ROOT}/branding" ]]; then
  # Ensure host path for compose bind exists before recreate
  true
fi

COOKIE=$(mktemp /tmp/cp-brand-cj.XXXXXX)
trap 'rm -f "$COOKIE"' EXIT

echo "== admin login =="
cp_admin_login "$COOKIE"

csrf_from() {
  local url=$1
  local html
  html=$(cp_curl -c "$COOKIE" -b "$COOKIE" "$url")
  # multiple possible CSRF field names
  printf '%s' "$html" | sed -n 's/.*name="csrf_test_name" value="\([^"]*\)".*/\1/p' | head -1
}

echo "== official: general settings (site name/description/icon) =="
# UI/docs: https://docs.castopod.org/main/en/user-guide/instance/settings/
# POST route: /{admin}/settings/instance  (SettingsController::attemptInstanceEdit)
GEN_GET="${CP_BASEURL}/${CP_ADMIN_GATEWAY}/settings"
GEN_POST="${CP_BASEURL}/${CP_ADMIN_GATEWAY}/settings/instance"
csrf=$(csrf_from "$GEN_GET")
[[ -n "$csrf" ]] || { echo "ERROR: no CSRF on settings general" >&2; exit 1; }

code=$(cp_curl -c "$COOKIE" -b "$COOKIE" -o /tmp/cp-gen.out -w '%{http_code}' \
  -X POST "${GEN_POST}" \
  -F "csrf_test_name=${csrf}" \
  -F "site_name=${CP_SITE_NAME}" \
  -F "site_description=${CP_SITE_DESCRIPTION}" \
  -F "site_icon=@${BRANDING_DST}/logo.png;type=image/png")
echo "general POST → HTTP $code"
# accept redirect
if [[ "$code" != "303" && "$code" != "302" && "$code" != "200" ]]; then
  echo "WARN: unexpected status; body:" >&2
  head -c 400 /tmp/cp-gen.out >&2 || true
fi

echo "== official: theme accent (${CP_THEME}) =="
THEME_URL="${CP_BASEURL}/${CP_ADMIN_GATEWAY}/settings/theme"
csrf=$(csrf_from "$THEME_URL")
[[ -n "$csrf" ]] || { echo "ERROR: no CSRF on settings theme" >&2; exit 1; }

code=$(cp_curl -c "$COOKIE" -b "$COOKIE" -o /tmp/cp-theme.out -w '%{http_code}' \
  -X POST "${THEME_URL}" \
  --data-urlencode "csrf_test_name=${csrf}" \
  --data-urlencode "theme=${CP_THEME}")
echo "theme POST → HTTP $code"

if [[ "${CP_APPLY_OVERLAY}" == "1" && -f "${BRANDING_DST}/theme-hacktivism-overlay.css" ]]; then
  echo "== optional: warm-dark CSS overlay (not official) =="
  # Serve from container public path via bind (compose) or copy into media volume
  podman cp "${BRANDING_DST}/theme-hacktivism-overlay.css" \
    koopa-castopod:/app/public/assets/hacktivism-overlay.css 2>/dev/null || true

  # Idempotent inject before </head> in public layouts (re-run after image upgrade)
  # Themes are root-owned in the image — patch as root (re-run after image upgrade).
  # shellcheck disable=SC2016
  podman exec -u 0 koopa-castopod sh -c '
    LINK="<!-- hacktivism-overlay --><link rel=\"stylesheet\" href=\"/assets/hacktivism-overlay.css\">"
    for f in /app/themes/cp_app/home.php \
             /app/themes/cp_app/podcast/_layout.php \
             /app/themes/cp_app/episode/_layout.php \
             /app/themes/cp_app/pages/_layout.php \
             /app/themes/cp_app/embed.php; do
      [ -f "$f" ] || continue
      if grep -q "hacktivism-overlay" "$f"; then
        echo "already: $f"
        continue
      fi
      awk -v link="$LINK" "{ if (\$0 ~ /<\\/head>/ && !done) { print link; done=1 } print }" "$f" > "$f.tmp" \
        && mv "$f.tmp" "$f" \
        && echo "patched: $f"
    done
  ' || echo "WARN: layout patch skipped (container missing?)"
fi

# Clear page cache so theme/name show up
podman exec koopa-castopod sh -c 'rm -rf /app/writable/cache/* 2>/dev/null || true' || true

echo "Done. Hard-reload https://castopod.hacktivism.ch/"
echo "Official UI also: ${CP_BASEURL}/${CP_ADMIN_GATEWAY}/settings  (and /settings/theme)"