#!/usr/bin/env bash
set -euo pipefail

BASE_DIR="$HOME/git-projekte"

# --- Farben ------------------------------------------------------------
if [ -t 1 ]; then
  C_RED=$'\033[31m'
  C_GREEN=$'\033[32m'
  C_YELLOW=$'\033[33m'
  C_BOLD=$'\033[1m'
  C_RESET=$'\033[0m'
else
  C_RED=""; C_GREEN=""; C_YELLOW=""; C_BOLD=""; C_RESET=""
fi

# --- Argumente ----------------------------------------------------------
while [[ $# -gt 0 ]]; do
  case "$1" in
    -p|--path) BASE_DIR="$2"; shift 2 ;;
    -h|--help)
      cat <<EOF
Usage: ${0##*/} [OPTIONEN]

Synchronisiert alle Git-Repositories (git pull).
Repos mit lokalen Aenderungen werden uebersprungen.

Optionen:
  -p, --path DIR  anderes Basisverzeichnis statt ~/git-projekte
  -h, --help      diese Hilfe anzeigen
EOF
      exit 0
      ;;
    *) echo "Unbekannte Option: $1" >&2; exit 2 ;;
  esac
done

if [ ! -d "$BASE_DIR" ]; then
  echo "Verzeichnis $BASE_DIR existiert nicht."
  exit 0
fi

echo "${C_BOLD}Git-Repositories aktualisieren: $BASE_DIR${C_RESET}"
echo

# --- Repos finden und sortieren -----------------------------------------
gitdirs=()
while IFS= read -r gitdir; do
  gitdirs+=( "$gitdir" )
done < <(find "$BASE_DIR" -type d -name ".git" -print 2>/dev/null)

if [ ${#gitdirs[@]} -eq 0 ]; then
  echo "Keine Git-Repositories gefunden."
  exit 0
fi

IFS=$'\n' sorted_gitdirs=( $(printf '%s\n' "${gitdirs[@]}" | sort) )
unset IFS

# --- Pull ---------------------------------------------------------------
total=0
updated=0
skipped=0
failed=0

for gitdir in "${sorted_gitdirs[@]}"; do
  repo_dir="${gitdir%/.git}"
  repo_name="${repo_dir#$BASE_DIR/}"
  ((total++))

  cd "$repo_dir" || continue

  # Lokale Aenderungen? -> ueberspringen
  if [[ -n "$(git status --porcelain 2>/dev/null)" ]]; then
    printf "${C_YELLOW}SKIP${C_RESET}  %s (lokale Aenderungen)\n" "$repo_name"
    ((skipped++))
    continue
  fi

  # Kein Remote? -> ueberspringen
  if ! git remote | grep -q .; then
    printf "${C_YELLOW}SKIP${C_RESET}  %s (kein Remote)\n" "$repo_name"
    ((skipped++))
    continue
  fi

  # Pull
  if output=$(git pull --ff-only 2>&1); then
    if echo "$output" | grep -q "Already up to date"; then
      printf "${C_GREEN}OK${C_RESET}    %s (aktuell)\n" "$repo_name"
    else
      printf "${C_GREEN}PULL${C_RESET}  %s (aktualisiert)\n" "$repo_name"
      ((updated++))
    fi
  else
    printf "${C_RED}FAIL${C_RESET}  %s\n" "$repo_name"
    ((failed++))
  fi
done

# --- Zusammenfassung ----------------------------------------------------
echo
echo "${C_BOLD}Gesamt:${C_RESET}       $total Repositories"
echo "${C_GREEN}Aktualisiert:${C_RESET} $updated"
echo "${C_YELLOW}Uebersprungen:${C_RESET} $skipped"
echo "${C_RED}Fehlgeschlagen:${C_RESET} $failed"