#!/usr/bin/env bash
# Deploy this frontend folder to its own HF Space (Etiya/d2l-ui).
#
# Usage:
#   ./scripts/deploy-to-hf-space.sh                    # incremental push
#   ./scripts/deploy-to-hf-space.sh --create           # first-time, create Space then push
#
# Pre-requisites:
#   - hf CLI logged in (`hf auth login`)
#   - Write access to Etiya org
#   - Run from frontend/ directory

set -euo pipefail

SPACE_OWNER="Etiya"
SPACE_NAME="d2l-ui"
REMOTE_URL="https://huggingface.co/spaces/${SPACE_OWNER}/${SPACE_NAME}"

# Resolve script-relative paths so the script is location-independent.
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
FRONTEND_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
cd "${FRONTEND_DIR}"

if [[ "${1:-}" == "--create" ]]; then
  echo "▶ Creating Space ${SPACE_OWNER}/${SPACE_NAME}…"
  hf repo create "${SPACE_NAME}" \
    --repo-type space \
    --space-sdk docker \
    --private \
    --organization "${SPACE_OWNER}" \
    --exist-ok
fi

# Sanity: ensure SPACE_README.md exists; HF needs the YAML frontmatter.
if [[ ! -f SPACE_README.md ]]; then
  echo "ERROR: SPACE_README.md missing — Space requires it as the deployed README." >&2
  exit 1
fi

# Stash dev README, swap in SPACE_README, push, restore.
TMP_DEV_README="$(mktemp /tmp/dev-readme.XXXXXX.md)"
trap 'mv "${TMP_DEV_README}" README.md 2>/dev/null || true' EXIT
cp README.md "${TMP_DEV_README}"
cp SPACE_README.md README.md

# Initialize git remote if needed.
if [[ ! -d .git ]]; then
  echo "▶ Initializing git…"
  git init -b main >/dev/null
  git remote add origin "${REMOTE_URL}"
fi

# If origin remote exists but mismatches, fix.
CURRENT_REMOTE="$(git remote get-url origin 2>/dev/null || true)"
if [[ "${CURRENT_REMOTE}" != "${REMOTE_URL}" ]]; then
  if [[ -n "${CURRENT_REMOTE}" ]]; then
    git remote set-url origin "${REMOTE_URL}"
  else
    git remote add origin "${REMOTE_URL}"
  fi
fi

# Pull existing remote (if it exists) — handles HF's auto-generated initial commit.
git fetch origin main 2>/dev/null || true
git pull --rebase origin main 2>/dev/null || true

# Stage + commit. node_modules / .next ignored by .gitignore.
git add -A
if git diff --cached --quiet; then
  echo "▶ No changes to commit; pushing existing HEAD."
else
  git commit -m "Deploy: $(date -u +%Y-%m-%dT%H:%M:%SZ)"
fi

echo "▶ Pushing to ${REMOTE_URL}…"
git push -u origin main

echo ""
echo "✓ Done. Build will start automatically. Track at:"
echo "  ${REMOTE_URL}?logs=build"
echo ""
echo "Once running, open:"
echo "  https://etiya-d2l-ui.hf.space"
echo ""
echo "If you haven't yet: set HF_TOKEN as a Space Secret at"
echo "  ${REMOTE_URL}/settings"