#!/usr/bin/env bash
# =============================================================================
# 01-login.sh  (Linux)
# Authenticates your local machine to Google Cloud and configures Docker
# to push images to Artifact Registry.
#
# Run this once per machine (or whenever your credentials expire).
# Windows users: run GCR/scripts/01-login.ps1 in PowerShell instead.
# =============================================================================
set -euo pipefail

if [[ "$(uname -s)" != "Linux" ]]; then
    echo "ERROR: This script is for Linux only."
    echo "Windows users: run GCR/scripts/01-login.ps1"
    exit 1
fi

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# ── Load .env ─────────────────────────────────────────────────────────────────
ENV_FILE="$SCRIPT_DIR/../.env"
if [[ ! -f "$ENV_FILE" ]]; then
    echo "ERROR: $ENV_FILE not found."
    echo "Copy GCR/.env.example to GCR/.env and fill in your values first."
    exit 1
fi
# shellcheck disable=SC1090
source "$ENV_FILE"

: "${GCP_PROJECT_ID:?GCP_PROJECT_ID is not set in .env}"
: "${GCP_REGION:?GCP_REGION is not set in .env}"

# ── Step 1: Authenticate user account ────────────────────────────────────────
echo ">>> Logging in to Google Cloud..."
echo "    A browser window will open. Sign in with the Google account that has"
echo "    access to project: $GCP_PROJECT_ID"
echo ""
gcloud auth login

# ── Step 2: Set default project ──────────────────────────────────────────────
echo ""
echo ">>> Setting default project to: $GCP_PROJECT_ID"
gcloud config set project "$GCP_PROJECT_ID"

# ── Step 3: Set default region ───────────────────────────────────────────────
echo ">>> Setting default region to: $GCP_REGION"
gcloud config set run/region "$GCP_REGION"

# ── Step 4: Configure Docker to authenticate against Artifact Registry ────────
echo ""
echo ">>> Configuring Docker to authenticate with Artifact Registry..."
gcloud auth configure-docker "${GCP_REGION}-docker.pkg.dev" --quiet

echo ""
echo ">>> Login complete. You are now authenticated as:"
gcloud auth list --filter=status:ACTIVE --format="value(account)"
echo ""
echo ">>> Next step: run GCR/scripts/02-setup-project.sh"