#!/bin/bash

# Complete Table-by-Table Database Migration
set -e

# Database credentials
DB_USER="tilbudgivern_service"
DB_PASS="REDACTED_PASSWORD"
DB_NAME="tilbudgivern"

echo "🔄 Starting COMPLETE table-by-table database migration..."

# 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/complete_migration
cd /tmp/complete_migration

# Drop and recreate database for clean start
echo "🗄️ Recreating database..."
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;"

# Get complete table list from remote
echo "📋 Getting table list from remote server..."
ssh -p 55555 alex@s.alw.dk "sudo mysql tilbudgivern -e 'SHOW TABLES;'" | grep -v "Tables_in" > table_list.txt

echo "Found $(wc -l < table_list.txt) tables to migrate"

# Export each table structure and data separately
echo "📤 Exporting table structures..."
ssh -p 55555 alex@s.alw.dk "sudo mysqldump tilbudgivern --no-data --single-transaction --skip-triggers --skip-routines --skip-events" > structure.sql 2>/dev/null

# Clean structure file of problematic elements
sed -i 's/DEFINER=[^ ]* //g' structure.sql

echo "📦 Importing table structures..."
mysql -u "$DB_USER" -p"$DB_PASS" "$DB_NAME" < structure.sql

# Export and import data for each table
echo "📊 Migrating table data..."
failed_tables=0
success_tables=0

while read -r table; do
    echo "  -> Migrating $table..."
    
    # Export table data
    ssh -p 55555 alex@s.alw.dk "sudo mysqldump tilbudgivern --no-create-info --skip-triggers --skip-routines --complete-insert $table" > "${table}_data.sql" 2>/dev/null
    
    # Import table data
    if mysql -u "$DB_USER" -p"$DB_PASS" "$DB_NAME" < "${table}_data.sql" 2>/dev/null; then
        echo "     ✅ $table migrated successfully"
        ((success_tables++))
    else
        echo "     ❌ $table failed"
        ((failed_tables++))
    fi
    
done < table_list.txt

echo ""
echo "📊 Migration Summary:"
echo "  ✅ Successfully migrated: $success_tables tables"
echo "  ❌ Failed migrations: $failed_tables tables"

# Verify final table count
local_tables=$(mysql -u "$DB_USER" -p"$DB_PASS" -e "USE $DB_NAME; SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = '$DB_NAME';" --skip-column-names)
echo "  📋 Local tables now: $local_tables"

# Show key table data counts
echo ""
echo "📈 Key Table Data Verification:"
mysql -u "$DB_USER" -p"$DB_PASS" -e "
USE $DB_NAME;
SELECT 'customer_projects' as table_name, COUNT(*) as records FROM customer_projects
UNION ALL
SELECT 'project_quotes', COUNT(*) FROM project_quotes
UNION ALL
SELECT 'bygma_products', COUNT(*) FROM bygma_products
UNION ALL
SELECT 'materials', COUNT(*) FROM materials;
" 2>/dev/null || echo "Some tables might be empty"

echo ""
if [ $failed_tables -eq 0 ]; then
    echo "🎉 COMPLETE database migration successful!"
else
    echo "⚠️ Migration completed with $failed_tables failed tables"
fi

echo "Database is now ready for production use!"