#!/bin/bash

# check-contract.sh
#
# CI contract validation script
#
# Checks:
# 1. Schema matches committed version
# 2. Hash matches committed version
# 3. Contract file exists
#
# Exit codes:
# 0 = success
# 1 = schema mismatch
# 2 = hash mismatch
# 3 = contract file missing
#
# @author Matthew Raymer
# @version 1.0.0

set -euo pipefail

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

CONTRACT_FILE="$PROJECT_ROOT/contracts/NotificationContract.v1.ts"
SCHEMA_FILE="$PROJECT_ROOT/contracts/notification.v1.schema.json"
HASH_FILE="$PROJECT_ROOT/contracts/notification.v1.hash"

echo "🔍 Checking contract v1 compliance..."

# Check contract file exists
if [ ! -f "$CONTRACT_FILE" ]; then
    echo "❌ Contract file not found: $CONTRACT_FILE"
    exit 3
fi

# Generate current schema and hash
echo "📋 Generating current schema and hash..."
CURRENT_SCHEMA=$(node "$SCRIPT_DIR/generate-contract-schema.js" 2>&1 | grep -v "✅\|📋\|📝" || true)
CURRENT_HASH=$(cat "$HASH_FILE")

# Read committed hash
if [ ! -f "$HASH_FILE" ]; then
    echo "❌ Hash file not found: $HASH_FILE"
    exit 3
fi

COMMITTED_HASH=$(cat "$HASH_FILE")

# Compare hashes
if [ "$CURRENT_HASH" != "$COMMITTED_HASH" ]; then
    echo "❌ Contract hash mismatch!"
    echo "   Current:  $CURRENT_HASH"
    echo "   Committed: $COMMITTED_HASH"
    echo ""
    echo "⚠️  Contract has been modified without version bump."
    echo "   See docs/0017-Daily-Notification-Contract-Freeze.md for change process."
    exit 2
fi

# Check schema file exists
if [ ! -f "$SCHEMA_FILE" ]; then
    echo "❌ Schema file not found: $SCHEMA_FILE"
    exit 3
fi

echo "✅ Contract v1 validation passed"
echo "   Hash: $CURRENT_HASH"
exit 0