#!/usr/bin/env bash
# push-assets.sh — synchronise les assets locaux vers static.alpinux.org
#
# Usage :
#   ./push-assets.sh           # aperçu des changements + confirmation
#   ./push-assets.sh -y        # pousse sans confirmation
#   ./push-assets.sh -n        # dry-run seulement (aucune modification)

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ENV_FILE="$SCRIPT_DIR/../.env"

# ── Couleurs ────────────────────────────────────────────────────────
RED='\033[0;31m'; YELLOW='\033[1;33m'; GREEN='\033[0;32m'
CYAN='\033[0;36m'; BOLD='\033[1m'; RESET='\033[0m'

# ── Config ──────────────────────────────────────────────────────────
if [ ! -f "$ENV_FILE" ]; then
  echo -e "${RED}Erreur : fichier .env introuvable.${RESET}"
  echo "Copier scripts/../.env.example en .env et remplir les valeurs."
  exit 1
fi
# shellcheck source=/dev/null
source "$ENV_FILE"

LOCAL_DIR="${LOCAL_ASSETS_DIR:-/tmp/alpinux-static-assets}"
REMOTE_USER="${STATIC_USER:?Variable STATIC_USER manquante dans .env}"
REMOTE_HOST="${STATIC_HOST:?Variable STATIC_HOST manquante dans .env}"
REMOTE_PATH="${STATIC_PATH:?Variable STATIC_PATH manquante dans .env}"
REMOTE="${REMOTE_USER}@${REMOTE_HOST}:${REMOTE_PATH}/"

# ── Arguments ───────────────────────────────────────────────────────
DRY_RUN=false
AUTO_YES=false
for arg in "$@"; do
  case "$arg" in
    -n|--dry-run)  DRY_RUN=true  ;;
    -y|--yes)      AUTO_YES=true ;;
    -h|--help)
      sed -n '2,6p' "$0" | sed 's/^# //'
      exit 0 ;;
  esac
done

if [ ! -d "$LOCAL_DIR" ]; then
  echo -e "${RED}Erreur : répertoire local introuvable : $LOCAL_DIR${RESET}"
  echo "Lancer d'abord : python3 wiki/scripts/build-assets.py"
  exit 1
fi

# ── Analyse des changements ─────────────────────────────────────────
echo -e "${BOLD}Analyse des changements…${RESET}"
echo -e "  Source : ${CYAN}$LOCAL_DIR/${RESET}"
echo -e "  Cible  : ${CYAN}$REMOTE${RESET}"
echo ""

DIFF=$(rsync -rlcz --dry-run --itemize-changes --delete \
  "$LOCAL_DIR/" "$REMOTE" 2>&1)

NEW=0; CHANGED=0; DELETED=0

while IFS= read -r line; do
  item="${line:0:11}"
  file="${line:12}"
  [ -z "$file" ] && continue
  if [[ "$item" == *"deleting"* ]]; then
    echo -e "  ${RED}supprimé  ${RESET} $file"
    ((DELETED++))
  elif [[ "$item" =~ ^\>f\+{6,} ]]; then
    echo -e "  ${GREEN}nouveau   ${RESET} $file"
    ((NEW++))
  elif [[ "$item" =~ ^\>f ]]; then
    echo -e "  ${YELLOW}modifié   ${RESET} $file"
    ((CHANGED++))
  fi
done <<< "$DIFF"

TOTAL=$((NEW + CHANGED + DELETED))

if [ "$TOTAL" -eq 0 ]; then
  echo -e "${GREEN}Tout est à jour — aucun changement à pousser.${RESET}"
  exit 0
fi

echo ""
echo -e "  ${GREEN}+$NEW nouveau(x)${RESET}  ${YELLOW}~$CHANGED modifié(s)${RESET}  ${RED}-$DELETED supprimé(s)${RESET}"
echo ""

$DRY_RUN && { echo -e "${CYAN}Mode dry-run — aucune modification effectuée.${RESET}"; exit 0; }

# ── Confirmation ────────────────────────────────────────────────────
if ! $AUTO_YES; then
  read -rp "Pousser ces changements vers $REMOTE_HOST ? [o/N] " confirm
  [[ "$confirm" =~ ^[oOyY]$ ]] || { echo "Annulé."; exit 0; }
fi

# ── Synchronisation ─────────────────────────────────────────────────
echo ""
echo -e "${BOLD}Synchronisation en cours…${RESET}"
rsync -rlcz --human-readable --progress --delete \
  "$LOCAL_DIR/" "$REMOTE"

echo ""
echo -e "${GREEN}✓ Synchronisation terminée.${RESET}"