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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
ENV_FILE="${HA_ADDON_ENV_FILE:-$SCRIPT_DIR/.env}"

[[ -f "$ENV_FILE" ]] || {
  echo "Missing $ENV_FILE. Copy $SCRIPT_DIR/.env.example to $SCRIPT_DIR/.env and edit it." >&2
  exit 1
}

set -a
# shellcheck disable=SC1090
source "$ENV_FILE"
set +a

required=(HA_REPO_URL HA_REPO_BRANCH HA_REPO_PATH ADDON_DIR INTEGRATION_DOMAIN)
for name in "${required[@]}"; do
  [[ -n "${!name:-}" ]] || { echo "Missing $name in $ENV_FILE" >&2; exit 1; }
done

command -v git >/dev/null 2>&1 || { echo "git is required" >&2; exit 1; }
command -v rsync >/dev/null 2>&1 || { echo "rsync is required" >&2; exit 1; }

if [[ "$HA_REPO_PATH" != /* ]]; then
  HA_REPO_PATH="$PROJECT_ROOT/$HA_REPO_PATH"
fi
HA_REPO_PATH="$(realpath -m "$HA_REPO_PATH")"
INTEGRATION_SOURCE="$SCRIPT_DIR/home-assistant/custom_components/$INTEGRATION_DOMAIN"

[[ -d "$SCRIPT_DIR/repository/$ADDON_DIR" ]] || { echo "Missing add-on source" >&2; exit 1; }
[[ -d "$INTEGRATION_SOURCE" ]] || { echo "Missing integration source: $INTEGRATION_SOURCE" >&2; exit 1; }

"$SCRIPT_DIR/build.sh" render

if [[ ! -e "$HA_REPO_PATH" ]]; then
  git clone --branch "$HA_REPO_BRANCH" "$HA_REPO_URL" "$HA_REPO_PATH"
elif [[ ! -d "$HA_REPO_PATH/.git" ]]; then
  echo "HA_REPO_PATH exists but is not a Git repository: $HA_REPO_PATH" >&2
  exit 1
fi

if [[ -n "$(git -C "$HA_REPO_PATH" status --porcelain)" ]]; then
  echo "HA repository has uncommitted changes: $HA_REPO_PATH" >&2
  exit 1
fi

git -C "$HA_REPO_PATH" checkout "$HA_REPO_BRANCH"
git -C "$HA_REPO_PATH" pull --ff-only origin "$HA_REPO_BRANCH"

STAGE="$(mktemp -d)"
trap 'rm -rf "$STAGE"' EXIT
rsync -a "$SCRIPT_DIR/repository/" "$STAGE/"
mkdir -p "$STAGE/custom_components/$INTEGRATION_DOMAIN"
rsync -a "$INTEGRATION_SOURCE/" "$STAGE/custom_components/$INTEGRATION_DOMAIN/"
rsync -a --delete --exclude='.git/' "$STAGE/" "$HA_REPO_PATH/"

git -C "$HA_REPO_PATH" add -A
if git -C "$HA_REPO_PATH" diff --cached --quiet; then
  echo "HA repository is already synchronized."
  exit 0
fi

VERSION="$(awk -F '"' '/^version = "/ {print $2; exit}' "$PROJECT_ROOT/Cargo.toml")"
[[ -n "$VERSION" ]] || { echo "Cannot determine version from Cargo.toml" >&2; exit 1; }

git -C "$HA_REPO_PATH" commit -m "GREE Controller ${VERSION}"
git -C "$HA_REPO_PATH" push origin "$HA_REPO_BRANCH"
printf 'Synchronized add-on + custom integration -> %s (%s)\n' "$HA_REPO_URL" "$HA_REPO_BRANCH"