#!/bin/bash
set -e

# Configuration
REGISTRY_URL="https://git.infra.mintel.me/api/packages/mmintel/npm/"
REGISTRY_DOMAIN="git.infra.mintel.me"
REGISTRY_PATH="/api/packages/mmintel/npm/"
SCOPE="@mintel"

echo "🔍 Starting functional registry discovery..."

# Discover token
token=""
token_src=""
if [ -n "$NPM_TOKEN" ]; then
    token="$NPM_TOKEN"
    token_src="NPM_TOKEN"
elif [ -n "$GITEA_PAT" ]; then
    token="$GITEA_PAT"
    token_src="GITEA_PAT"
elif [ -n "$MINTEL_PRIVATE_TOKEN" ]; then
    token="$MINTEL_PRIVATE_TOKEN"
    token_src="MINTEL_PRIVATE_TOKEN"
fi

if [ -z "$token" ]; then
    echo "❌ No registry token found (checked NPM_TOKEN, GITEA_PAT, MINTEL_PRIVATE_TOKEN)"
    exit 1
fi

# Diagnostic: check token format
echo "Found token from $token_src (length: ${#token})"

# Check if it's base64 encoded user:pass (common in legacy npm)
is_base64_auth=false
if [[ "$token" =~ ^[A-Za-z0-9+/]*={0,2}$ ]] && [ ${#token} -gt 20 ]; then
    decoded=$(echo "$token" | base64 -d 2>/dev/null || echo "")
    if [[ "$decoded" == *":"* ]]; then
        echo "💡 Detected base64 encoded user:pass format."
        is_base64_auth=true
    fi
fi

# Functional check against the registry instead of the general API
# We test by fetching metadata for a known package
test_pkg="@mintel/mail"
echo "Testing registry access for $test_pkg..."

if [ "$is_base64_auth" = true ]; then
    status_code=$(curl -s -o /dev/null -w "%{http_code}" -H "Authorization: Basic $token" "${REGISTRY_URL}${test_pkg//\//@}")
else
    # Try both 'token' and 'Bearer' for Gitea compatibility
    status_code=$(curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token $token" "${REGISTRY_URL}${test_pkg//\//@}")
    if [ "$status_code" -ne 200 ]; then
        status_code=$(curl -s -o /dev/null -w "%{http_code}" -H "Authorization: Bearer $token" "${REGISTRY_URL}${test_pkg//\//@}")
    fi
fi

if [ "$status_code" -eq 200 ]; then
    echo "✅ Registry verification successful (Status: 200)"
else
    echo "❌ Registry verification failed (Status: $status_code)"
    echo "⚠️ Proceeding with generation but installation will likely fail."
fi

# Generate .npmrc
echo "Generating .npmrc..."

# Clean up registry path for keys (no protocol, trailing slash matters)
# We add multiple variations to be safe
cat << EOF > .npmrc
$SCOPE:registry=$REGISTRY_URL
always-auth=true
EOF

if [ "$is_base64_auth" = true ]; then
    echo "//${REGISTRY_DOMAIN}${REGISTRY_PATH}:_auth=$token" >> .npmrc
    echo "//${REGISTRY_DOMAIN}${REGISTRY_PATH%/}:_auth=$token" >> .npmrc
else
    echo "//${REGISTRY_DOMAIN}${REGISTRY_PATH}:_authToken=$token" >> .npmrc
    echo "//${REGISTRY_DOMAIN}${REGISTRY_PATH%/}:_authToken=$token" >> .npmrc
fi

# Add explicit registry mapping for non-scoped packages if needed (not here usually)
# Add some extra flags for stability
echo "progress=false" >> .npmrc
echo "verify-store-integrity=false" >> .npmrc

echo "✅ .npmrc hardened and generated."