#!/bin/bash
# Installa homepage moderna + favicon personalizzate per Gitea.
# DA ESEGUIRE COME ROOT SUL VPS (o con sudo).
# Uso:  bash install_gitea_theme.sh
set -euo pipefail

CUSTOM_DIR="${CUSTOM_DIR:-/var/lib/gitea/custom}"
SRC_DIR="$(cd "$(dirname "$0")" && pwd)/custom"
STAMP="$(date +%Y%m%d-%H%M%S)"
BACKUP_DIR="${CUSTOM_DIR}/.backup-${STAMP}"

if [ "$(id -u)" != "0" ]; then
  echo "ERRORE: devi eseguire questo script come root (o sudo)."
  exit 1
fi

if [ ! -d "$SRC_DIR" ]; then
  echo "ERRORE: cartella sorgente '$SRC_DIR' non trovata (script in cartella sbagliata?)."
  exit 1
fi

echo "==> Target custom dir: $CUSTOM_DIR"

# 1) Backup delle eventuali personalizzazioni esistenti
HAD_PREV=no
if [ -e "$CUSTOM_DIR/templates/home.tmpl" ] || [ -e "$CUSTOM_DIR/public/assets/img" ]; then
  HAD_PREV=yes
  mkdir -p "$BACKUP_DIR"
  for p in templates/home.tmpl public/assets/img; do
    if [ -e "$CUSTOM_DIR/$p" ]; then
      mkdir -p "$BACKUP_DIR/$(dirname "$p")"
      cp -a "$CUSTOM_DIR/$p" "$BACKUP_DIR/$p"
      echo "==> Backup salvato: $BACKUP_DIR/$p"
    fi
  done
else
  echo "==> Nessuna personalizzazione precedente, niente da salvare."
fi

# 2) Copia dei nuovi file
mkdir -p "$CUSTOM_DIR/templates" "$CUSTOM_DIR/public/assets/img"
cp "$SRC_DIR/templates/home.tmpl" "$CUSTOM_DIR/templates/home.tmpl"
cp "$SRC_DIR/public/assets/img/"* "$CUSTOM_DIR/public/assets/img/"
echo "==> File copiati:"
ls -l "$CUSTOM_DIR/templates/home.tmpl"
ls -l "$CUSTOM_DIR/public/assets/img/"

# 3) Permessi corretti (il processo gitea gira come utente gitea)
chown -R gitea:gitea "$CUSTOM_DIR"
echo "==> Permessi impostati (gitea:gitea)."

# 3b) Stato per il rollback
STATE_FILE="$CUSTOM_DIR/.gitea-theme-state"
{
  echo "installed_at=$STAMP"
  echo "backup_dir=$BACKUP_DIR"
  echo "had_custom=$HAD_PREV"
} > "$STATE_FILE"
echo "==> Stato rollback salvato in $STATE_FILE"

# 4) Riavvio di Gitea
systemctl restart gitea
sleep 6

# 5) Verifica
echo "==> Stato servizio:"
systemctl is-active gitea
echo "==> Verifica favicon (HTTP code):"
curl -sk -o /dev/null -w "  /assets/img/favicon.svg -> %{http_code}\n" https://127.0.0.1/assets/img/favicon.svg \
  || echo "  (curl locale non disponibile, verificare via browser)"
echo "==> Verifica logo:"
curl -sk -o /dev/null -w "  /assets/img/logo.svg -> %{http_code}\n" https://127.0.0.1/assets/img/logo.svg \
  || true

echo ""
echo "FATTO. Ricarica https://git.zomas.net (con Ctrl+Shift+R per bypassare la cache del browser)."
echo "Per ripristinare la versione originale:"
echo "  rm -rf $CUSTOM_DIR/templates/home.tmpl $CUSTOM_DIR/public/assets/img"
echo "  systemctl restart gitea"
echo "Backup delle vecchie file (se esistenti): $BACKUP_DIR"