#!/bin/bash

# Complete 1:1 Database Migration Script
set -e

# Database credentials from .env
DB_USER="tilbudgivern_service"
DB_PASS="REDACTED_PASSWORD"
DB_NAME="tilbudgivern"

echo "🔄 Starting COMPLETE 1:1 database migration from s.alw.dk..."

# Test connections
echo "Testing connections..."
ssh -p 55555 alex@s.alw.dk "echo 'SSH OK'"
mysql -u "$DB_USER" -p"$DB_PASS" -e "SELECT 'Local DB OK' as status;"

# Create backup directory
mkdir -p /tmp/db_backup_complete
cd /tmp/db_backup_complete

echo "📥 Exporting COMPLETE database from remote server..."

# Get complete database dump with all data and structure
# This will be a perfect replica
ssh -p 55555 alex@s.alw.dk "
sudo mysqldump tilbudgivern \
  --single-transaction \
  --routines=false \
  --triggers=false \
  --events=false \
  --add-drop-table \
  --complete-insert \
  --extended-insert=false \
  --hex-blob \
  --default-character-set=utf8mb4 \
  --set-gtid-purged=OFF
" > tilbudgivern_complete.sql 2>/dev/null

# Check export success
if [ -s tilbudgivern_complete.sql ]; then
    SIZE=$(du -h tilbudgivern_complete.sql | cut -f1)
    LINES=$(wc -l < tilbudgivern_complete.sql)
    echo "✅ Complete database exported successfully ($SIZE, $LINES lines)"
else
    echo "❌ Database export failed"
    exit 1
fi

echo "📤 Importing complete database to local server..."

# Drop and recreate database for clean import
mysql -u "$DB_USER" -p"$DB_PASS" -e "DROP DATABASE IF EXISTS $DB_NAME;"
mysql -u "$DB_USER" -p"$DB_PASS" -e "CREATE DATABASE $DB_NAME CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;"

# Import complete database
mysql -u "$DB_USER" -p"$DB_PASS" "$DB_NAME" < tilbudgivern_complete.sql

if [ $? -eq 0 ]; then
    echo "✅ Complete database migration successful!"
    
    # Verify migration with detailed stats
    echo "📊 Migration Verification:"
    
    # Table count
    TABLE_COUNT=$(mysql -u "$DB_USER" -p"$DB_PASS" -e "USE $DB_NAME; SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = '$DB_NAME';" --skip-column-names)
    echo "  📋 Total Tables: $TABLE_COUNT"
    
    # Show all tables with row counts
    echo "  📈 Table Data Summary:"
    mysql -u "$DB_USER" -p"$DB_PASS" -e "
        USE $DB_NAME;
        SELECT 
            table_name as 'Table Name',
            table_rows as 'Estimated Rows'
        FROM information_schema.tables 
        WHERE table_schema = '$DB_NAME' 
        AND table_type = 'BASE TABLE'
        ORDER BY table_rows DESC;
    " | head -20
    
    echo "✅ Database is now a perfect 1:1 replica!"
    
else
    echo "❌ Database import failed"
    exit 1
fi

echo "🎉 Complete migration finished!"