#!/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}

# 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
  # Push with upstream set; handle non-FF by one-time rebase+retry (then optional force-with-lease)
  if ! git push -u origin ext; then
    echo "[submodule] push failed, retrying after rebase"
    git fetch origin ext || true
    git pull --rebase --autostash origin ext || true
    if ! git push -u origin ext; then
      if [ "$PUSH_FORCE" = "1" ]; then
        echo "[submodule] rebase push failed, forcing with lease"
        git push --force-with-lease -u origin ext || echo "[submodule] push still failing for $name"
      else
        echo "[submodule] push still failing for $name (set PUSH_FORCE=1 to force)"
      fi
    fi
  fi
'

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
if ! git push -u origin ext; then
  echo "[root] push failed, retrying after rebase"
  git fetch origin ext || true
  git pull --rebase --autostash origin ext || true
  if ! git push -u origin ext; then
    if [ "$PUSH_FORCE" = "1" ]; then
      echo "[root] rebase push failed, forcing with lease"
      git push --force-with-lease -u origin ext || echo "[root] push still failing"
    else
      echo "[root] push still failing (set PUSH_FORCE=1 to force)"
    fi
  fi
fi

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