#!/bin/sh
# Clone ac-workspace + all submodules on a clean machine (branch next).
# Usage:
#   sh fresh-clone-dev-env.sh
#   sh fresh-clone-dev-env.sh -d ~/projects/androidcast-ac
#   AC_GIT_BASE=git://f0xx.org/ac AC_BRANCH=next sh fresh-clone-dev-env.sh
set -eu

AC_GIT_BASE="${AC_GIT_BASE:-git://f0xx.org/ac}"
AC_BRANCH="${AC_BRANCH:-next}"
TARGET="${TARGET:-${HOME}/src/androidcast-ac}"
DO_VERIFY=1

usage() {
  sed -n '2,12p' "$0"
  exit 0
}

while [ $# -gt 0 ]; do
  case "$1" in
    -d|--dir) TARGET="${2:?}"; shift 2 ;;
    -h|--help) usage ;;
    --no-verify) DO_VERIFY=0; shift ;;
    *) echo "unknown arg: $1" >&2; exit 1 ;;
  esac
done

need() {
  command -v "$1" >/dev/null 2>&1 || {
    echo "ERROR: missing command: $1" >&2
    exit 1
  }
}

need git

WORKSPACE_URL="${AC_GIT_BASE}/ac-workspace"
log() { printf '[fresh-clone] %s\n' "$*"; }
die() { log "ERROR: $*"; exit 1; }

log "git base=${AC_GIT_BASE} branch=${AC_BRANCH} target=${TARGET}"

if [ -d "${TARGET}/.git" ]; then
  log "existing clone at ${TARGET} — fetch + submodule sync"
  git -C "$TARGET" fetch origin
  git -C "$TARGET" checkout "$AC_BRANCH"
  git -C "$TARGET" pull --ff-only origin "$AC_BRANCH" 2>/dev/null \
    || git -C "$TARGET" reset --hard "origin/${AC_BRANCH}"
else
  mkdir -p "$(dirname "$TARGET")"
  log "clone ${WORKSPACE_URL} → ${TARGET}"
  git clone --branch "$AC_BRANCH" --single-branch "$WORKSPACE_URL" "$TARGET"
fi

cd "$TARGET"
git submodule sync --recursive
log "submodule update --init --recursive (may take a few minutes)"
git submodule update --init --recursive

EXPECTED="$(grep -c '^\[submodule ' .gitmodules 2>/dev/null || echo 0)"
FOUND="$(find . -maxdepth 1 -type d -name 'ac-*' 2>/dev/null | wc -l | tr -d ' ')"
log "submodule dirs: found=${FOUND} expected≈${EXPECTED}"

if [ "$DO_VERIFY" -eq 0 ]; then
  log "done (verify skipped)"
  exit 0
fi

FAIL=0
git submodule foreach --recursive '
  if [ ! -e .git ] && [ ! -f .git ]; then
    echo "[fresh-clone] FAIL missing git metadata: $sm_path" >&2
    exit 1
  fi
' || FAIL=1

log "revision summary:"
git submodule foreach --quiet '
  printf "  %-28s %s  %s\n" "$sm_path" "$(git rev-parse --short HEAD 2>/dev/null)" "$(git remote get-url origin 2>/dev/null)"
'

WS_SHA="$(git rev-parse --short HEAD)"
log "ac-workspace @ ${WS_SHA}"

if [ "$FAIL" -ne 0 ]; then
  die "submodule verification failed — re-run: git submodule update --init --recursive"
fi

if [ "$FOUND" -lt "$((EXPECTED - 1))" ]; then
  die "expected ~${EXPECTED} ac-* dirs, found ${FOUND}"
fi

log "OK fresh clone ready at ${TARGET}"
log "next: read ac-docs/docs/FRESH_ENV_CLONE.md and ac-docs/docs/SECRETS_AND_RECOVERY.md"