#!/usr/bin/env sh
set -eu

REPO_URL="${REPO_URL:-http://100.64.0.1:30087/virgil-admin/rta-mock-docs.git}"
TARGET_DIR="${TARGET_DIR:-$HOME/Developer/Section0/rta-mock-docs}"
COMMAND_DIR="${COMMAND_DIR:-$HOME/.local/bin}"
COMMAND_NAME="${COMMAND_NAME:-rta-mock-docs}"
COMMAND_PATH="$COMMAND_DIR/$COMMAND_NAME"

step() {
  printf "\n==> %s\n" "$*"
}

if ! command -v git >/dev/null 2>&1; then
  echo "git is required but was not found on PATH" >&2
  exit 1
fi

step "Preparing local Markdown workspace"
if [ -d "$TARGET_DIR/.git" ]; then
  echo "Repo already exists: $TARGET_DIR"
  git -C "$TARGET_DIR" remote set-url origin "$REPO_URL"
  git -C "$TARGET_DIR" fetch origin
  git -C "$TARGET_DIR" checkout main
  git -C "$TARGET_DIR" pull --ff-only
else
  mkdir -p "$(dirname "$TARGET_DIR")"
  git clone "$REPO_URL" "$TARGET_DIR"
fi

git -C "$TARGET_DIR" config pull.ff only

step "Installing helper command"
mkdir -p "$COMMAND_DIR"
cat > "$COMMAND_PATH" <<EOF
#!/usr/bin/env sh
set -eu

REPO_DIR="$TARGET_DIR"

usage() {
  cat <<USAGE
rta-mock-docs - helper for the RTA mock docs projection repo

Commands:
  open      print the repo path
  pull      pull latest Markdown with --ff-only
  status    show Git status
  commit    commit all current changes with MESSAGE
  push      push current branch
  help      show this help

Examples:
  rta-mock-docs pull
  rta-mock-docs status
  MESSAGE="Update concept notes" rta-mock-docs commit
  rta-mock-docs push

AFFiNE is read-only for this repo. Durable edits happen in Markdown, then the
projection operator pulls and projects.
USAGE
}

case "\${1:-help}" in
  open)
    printf "%s\n" "\$REPO_DIR"
    ;;
  pull)
    git -C "\$REPO_DIR" pull --ff-only
    ;;
  status)
    git -C "\$REPO_DIR" status --short --branch
    ;;
  commit)
    : "\${MESSAGE:?Set MESSAGE before running commit}"
    git -C "\$REPO_DIR" add .
    git -C "\$REPO_DIR" commit -m "\$MESSAGE"
    ;;
  push)
    git -C "\$REPO_DIR" push
    ;;
  help|--help|-h)
    usage
    ;;
  *)
    usage >&2
    exit 1
    ;;
esac
EOF
chmod +x "$COMMAND_PATH"

cat <<EOF
Ready.

Repo: $TARGET_DIR
Remote: $REPO_URL
Helper: $COMMAND_PATH

Daily flow:
  $COMMAND_NAME pull
  # edit Markdown
  $COMMAND_NAME status
  MESSAGE="Update docs" $COMMAND_NAME commit
  $COMMAND_NAME push

AFFiNE updates after the projection operator pulls and runs projection.

If $COMMAND_DIR is not on PATH, add this to your shell profile:
  export PATH="$COMMAND_DIR:\$PATH"
EOF