#!/usr/bin/env bash
# Pushes this folder to the Gitea repo. Run from inside the visitor-signin folder.
set -uo pipefail

REMOTE="https://gitea.hideawaygaming.com.au/jessikitty/visitor-signin.git"

fail() { printf '\n%s\n' "$1" >&2; exit 1; }

[ -f package.json ] || fail "Run this from inside the visitor-signin folder."
command -v git >/dev/null || fail "Git is not installed."

git config --global core.autocrlf input >/dev/null 2>&1 || true

[ -d .git ] || git init -b main || fail "git init failed."

if git remote | grep -qx origin; then
  git remote set-url origin "$REMOTE"
else
  git remote add origin "$REMOTE"
fi

# An unfinished rebase or merge blocks everything below, and git's own error is
# easy to mistake for a push problem.
GIT_DIR_PATH=$(git rev-parse --git-dir 2>/dev/null || echo .git)
for marker in rebase-merge rebase-apply MERGE_HEAD CHERRY_PICK_HEAD; do
  if [ -e "$GIT_DIR_PATH/$marker" ]; then
    cat >&2 <<'MSG'

There is an unfinished rebase or merge in this folder.
Nothing else can happen until it is settled:

  git rebase --abort      throw the attempt away, back to how things were
  git status              see which files still need attention
  git rebase --continue   after fixing the files git listed

If unsure, "git rebase --abort" is the safe one.
MSG
    exit 1
  fi
done

git add -A
if [ -n "$(git status --porcelain)" ]; then
  read -r -p "Describe this change (enter for a dated default): " MSG
  [ -n "$MSG" ] || MSG="Update $(date '+%Y-%m-%d %H:%M')"
  git commit -m "$MSG" || fail "git commit failed."
  echo "Committed."
else
  echo "No file changes to commit. Checking for anything unpushed..."
fi

git fetch origin || fail "Could not reach Gitea."

if git ls-remote --heads origin main | grep -q main; then
  BEHIND=$(git rev-list --count HEAD..origin/main 2>/dev/null || echo 0)
  if [ "$BEHIND" -gt 0 ]; then
    echo "The server has $BEHIND commit(s) this folder does not. Replaying your work on top..."
    if ! git pull --rebase origin main; then
      cat >&2 <<'MSG'

The two histories could not be joined automatically.

See what is on the server that you do not have:
    git log --oneline HEAD..origin/main

If that is nothing you need, and this folder is the good copy:
    git push --force-with-lease origin main
MSG
      exit 1
    fi
  fi
fi

git push -u origin main || fail "The push was rejected. Read the message above. Nothing was sent."

echo
echo "Pushed successfully."
echo "https://gitea.hideawaygaming.com.au/jessikitty/visitor-signin"