#!/usr/bin/env bash
# git-switch.sh – Branch wechseln oder erstellen, remote aktualisieren
#
# Verwendung:
#   bash .claude/scripts/git-switch.sh <branch>          – wechseln (pull wenn vorhanden)
#   bash .claude/scripts/git-switch.sh <branch> create   – neu aus aktuellem Branch
#   bash .claude/scripts/git-switch.sh <branch> from <base> – neu aus <base>

set -euo pipefail

BRANCH="${1:?'Branch-Name fehlt'}"
MODE="${2:-switch}"
BASE="${3:-}"

ROOT="$(git rev-parse --show-toplevel)"
cd "$ROOT"

case "$MODE" in
  switch)
    git fetch origin "$BRANCH" 2>/dev/null || true
    git checkout "$BRANCH" 2>/dev/null || git checkout -b "$BRANCH"
    git pull origin "$BRANCH" 2>/dev/null || true
    ;;
  create)
    git checkout -b "$BRANCH"
    git push -u origin "$BRANCH"
    ;;
  from)
    BASE="${3:?'Basis-Branch fehlt'}"
    git fetch origin "$BASE"
    git checkout -b "$BRANCH" "origin/$BASE"
    git push -u origin "$BRANCH"
    ;;
esac

echo "Aktiver Branch: $(git branch --show-current)"