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

echo "[push-ext-commit] Ensure all submodules on ext, commit if needed, push ext"
PUSH_FORCE=${PUSH_FORCE:-0}

push_branch_ext() {
  # Always push explicit branch refspec to avoid conflicts with tag 'ext'
  if ! git push -u origin refs/heads/ext:refs/heads/ext; then
    echo "[push] branch push failed, retrying after rebase"
    git fetch origin ext || true
    git pull --rebase --autostash origin ext || true
    if ! git push -u origin refs/heads/ext:refs/heads/ext; then
      if [ "$PUSH_FORCE" = "1" ]; then
        echo "[push] forcing with lease (branch ext)"
        git push --force-with-lease -u origin refs/heads/ext:refs/heads/ext || return 1
      else
        echo "[push] still failing (set PUSH_FORCE=1 to force)"; return 1
      fi
    fi
  fi
}

# Work from repo root
ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$ROOT_DIR"

# Update submodules metadata (non-recursive update of refs; content is already cloned)
git submodule init >/dev/null 2>&1 || true

git submodule foreach --recursive '
  set -e
  echo "[submodule] Enter: $name ($path)"
  # Ensure remote exists
  git remote show origin >/dev/null 2>&1 || { echo "[submodule] missing origin remote"; exit 0; }
  git config pull.rebase true || true
  git fetch --prune origin +refs/heads/*:refs/remotes/origin/* || true
  # Ensure local ext tracking origin/ext when available
  if git show-ref --verify --quiet refs/remotes/origin/ext; then
    if git rev-parse --verify ext >/dev/null 2>&1; then
      git switch ext
      git branch --set-upstream-to=origin/ext ext || true
    else
      git switch -C ext origin/ext
    fi
  else
    # Fallback: create ext if missing on remote
    if git rev-parse --verify ext >/dev/null 2>&1; then
      git switch ext
    else
      git switch -C ext
    fi
  fi
  # Rebase on remote if present to avoid non-fast-forward
  git fetch origin ext || true
  git rev-parse --verify origin/ext >/dev/null 2>&1 && git pull --rebase --autostash origin ext || true
  # Stage and commit if needed
  git add -A
  if ! git diff --cached --quiet; then
    git commit -m "auto_clea"
  fi
  # Ensure we are on ext branch (and not a symbolic heads/ext anomaly)
  cur_branch=$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo ext)
  if [ "$cur_branch" != "ext" ]; then
    # Try to rename if local ref exists as refs/heads/ext
    if git show-ref --verify --quiet refs/heads/ext; then git switch ext || git branch -m "$cur_branch" ext || true; fi
  fi
  push_branch_ext || echo "[submodule] push encountered errors for $name"
'

echo "[root] Process root repository"
git config pull.rebase true || true
git fetch --prune origin +refs/heads/*:refs/remotes/origin/* || true
if git show-ref --verify --quiet refs/remotes/origin/ext; then
  if git rev-parse --verify ext >/dev/null 2>&1; then
    git switch ext
    git branch --set-upstream-to=origin/ext ext || true
  else
    git switch -C ext origin/ext
  fi
else
  if git rev-parse --verify ext >/dev/null 2>&1; then
    git switch ext
  else
    git switch -C ext
  fi
fi
git fetch origin ext || true
git rev-parse --verify origin/ext >/dev/null 2>&1 && git pull --rebase --autostash origin ext || true
git add -A
if ! git diff --cached --quiet; then
  git commit -m "auto_clea"
fi
# Root push (explicit refspec to avoid tag/branch confusion)
push_branch_ext || echo "[root] push encountered errors"

echo "[push-ext-commit] Done."