#!/bin/bash

# Database Utilities and Maintenance Script
# Provides various database utility functions and maintenance tasks

set -e

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
BOLD='\033[1m'
NC='\033[0m' # No Color

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

# Change to project root
cd "$PROJECT_ROOT"

# Utility configuration
TEMP_DIR="temp"
DUMP_DIR="dumps"
LOGS_DIR="logs"
MAX_LOG_SIZE="100M"
LOG_RETENTION_DAYS=30

# Logging functions
log() {
    echo -e "${GREEN}[INFO]${NC} $1"
}

log_warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
}

log_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

log_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

log_debug() {
    if [ "$DEBUG" = "true" ]; then
        echo -e "${CYAN}[DEBUG]${NC} $1"
    fi
}

print_header() {
    echo -e "${BLUE}${BOLD}=== $1 ===${NC}"
}

print_subheader() {
    echo -e "${CYAN}--- $1 ---${NC}"
}

print_usage() {
    echo "Database Utilities and Maintenance Script"
    echo
    echo "Usage: $0 <command> [options]"
    echo
    echo "Commands:"
    echo "  size                 Show database size information"
    echo "  tables               List all tables with row counts"
    echo "  indexes              Show index information"
    echo "  constraints          Show table constraints"
    echo "  users                Show database users (PostgreSQL only)"
    echo "  permissions          Show user permissions"
    echo "  sessions             Show active sessions"
    echo "  locks                Show current locks"
    echo "  queries              Show running queries"
    echo "  kill-query           Kill a specific query"
    echo "  optimize             Optimize database (VACUUM, ANALYZE)"
    echo "  reindex              Rebuild indexes"
    echo "  check-integrity      Check database integrity"
    echo "  repair               Repair database issues"
    echo "  cleanup              Clean up temporary data"
    echo "  logs                 Show database logs"
    echo "  config               Show database configuration"
    echo "  extensions           List database extensions (PostgreSQL)"
    echo "  sequences            Show sequence information"
    echo "  triggers             Show table triggers"
    echo "  functions            Show user-defined functions"
    echo "  views                Show database views"
    echo "  schema-info          Show comprehensive schema information"
    echo "  duplicate-data       Find duplicate records"
    echo "  orphaned-data        Find orphaned records"
    echo "  table-stats          Show detailed table statistics"
    echo "  connection-test      Test database connection"
    echo "  benchmark            Run database benchmarks"
    echo "  export-schema        Export database schema"
    echo "  import-schema        Import database schema"
    echo "  copy-table           Copy table data"
    echo "  truncate-table       Truncate table data"
    echo "  reset-sequence       Reset sequence values"
    echo
    echo "Options:"
    echo "  --env ENV           Environment (dev/prod) [default: dev]"
    echo "  --table TABLE       Target table name"
    echo "  --schema SCHEMA     Target schema name"
    echo "  --query-id ID       Query ID to kill"
    echo "  --limit N           Limit results [default: 100]"
    echo "  --output FORMAT     Output format (table/json/csv) [default: table]"
    echo "  --file FILE         Output file path"
    echo "  --force             Force operation without confirmation"
    echo "  --debug             Enable debug output"
    echo "  --quiet             Suppress verbose output"
    echo "  --dry-run           Show what would be done without executing"
    echo
    echo "Examples:"
    echo "  $0 size                              # Show database size"
    echo "  $0 tables                            # List all tables"
    echo "  $0 tables --table users              # Show info for users table"
    echo "  $0 indexes --table users             # Show indexes for users table"
    echo "  $0 optimize                          # Optimize database"
    echo "  $0 cleanup                           # Clean up temporary data"
    echo "  $0 duplicate-data --table users      # Find duplicate users"
    echo "  $0 copy-table --table users          # Copy users table"
    echo "  $0 export-schema --file schema.sql   # Export schema to file"
    echo "  $0 benchmark                         # Run performance benchmarks"
}

# Check if .env file exists and load it
load_env() {
    if [ ! -f ".env" ]; then
        log_error ".env file not found"
        echo "Please run the database setup script first:"
        echo "  ./scripts/db-setup.sh setup"
        exit 1
    fi

    # Load environment variables
    export $(grep -v '^#' .env | xargs)
}

# Parse database URL
parse_database_url() {
    if [[ $DATABASE_URL == postgresql://* ]] || [[ $DATABASE_URL == postgres://* ]]; then
        DB_TYPE="postgresql"
        DB_HOST=$(echo $DATABASE_URL | sed -n 's/.*@\([^:]*\):.*/\1/p')
        DB_PORT=$(echo $DATABASE_URL | sed -n 's/.*:\([0-9]*\)\/.*/\1/p')
        DB_NAME=$(echo $DATABASE_URL | sed -n 's/.*\/\([^?]*\).*/\1/p')
        DB_USER=$(echo $DATABASE_URL | sed -n 's/.*\/\/\([^:]*\):.*/\1/p')
        DB_PASS=$(echo $DATABASE_URL | sed -n 's/.*:\/\/[^:]*:\([^@]*\)@.*/\1/p')
    elif [[ $DATABASE_URL == sqlite://* ]]; then
        DB_TYPE="sqlite"
        DB_FILE=$(echo $DATABASE_URL | sed 's/sqlite:\/\///')
    else
        log_error "Unsupported database URL format: $DATABASE_URL"
        exit 1
    fi
}

# Execute SQL query
execute_sql() {
    local query="$1"
    local capture_output="${2:-false}"
    local format="${3:-table}"

    log_debug "Executing SQL: $query"

    if [ "$DB_TYPE" = "postgresql" ]; then
        export PGPASSWORD="$DB_PASS"
        if [ "$capture_output" = "true" ]; then
            if [ "$format" = "csv" ]; then
                psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "$query" --csv 2>/dev/null
            else
                psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -t -A -c "$query" 2>/dev/null
            fi
        else
            psql -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" -d "$DB_NAME" -c "$query" 2>/dev/null
        fi
        unset PGPASSWORD
    elif [ "$DB_TYPE" = "sqlite" ]; then
        if [ "$capture_output" = "true" ]; then
            if [ "$format" = "csv" ]; then
                sqlite3 -header -csv "$DB_FILE" "$query" 2>/dev/null
            else
                sqlite3 "$DB_FILE" "$query" 2>/dev/null
            fi
        else
            sqlite3 "$DB_FILE" "$query" 2>/dev/null
        fi
    fi
}

# Setup utility directories
setup_directories() {
    mkdir -p "$TEMP_DIR" "$DUMP_DIR" "$LOGS_DIR"
}

# Show database size information
show_database_size() {
    print_header "Database Size Information"

    if [ "$DB_TYPE" = "postgresql" ]; then
        # Total database size
        local total_size=$(execute_sql "SELECT pg_size_pretty(pg_database_size('$DB_NAME'));" true)
        log "Total Database Size: $total_size"

        # Table sizes
        print_subheader "Table Sizes (Top 20)"
        execute_sql "
            SELECT
                schemaname,
                tablename,
                pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename)) as size,
                pg_size_pretty(pg_relation_size(schemaname||'.'||tablename)) as table_size,
                pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename) - pg_relation_size(schemaname||'.'||tablename)) as index_size
            FROM pg_tables
            WHERE schemaname NOT IN ('information_schema', 'pg_catalog')
            ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC
            LIMIT 20;
        "

        # Index sizes
        print_subheader "Index Sizes (Top 10)"
        execute_sql "
            SELECT
                schemaname,
                tablename,
                indexname,
                pg_size_pretty(pg_relation_size(indexrelid)) as size
            FROM pg_stat_user_indexes
            ORDER BY pg_relation_size(indexrelid) DESC
            LIMIT 10;
        "

    elif [ "$DB_TYPE" = "sqlite" ]; then
        if [ -f "$DB_FILE" ]; then
            local size=$(du -h "$DB_FILE" | cut -f1)
            log "Database File Size: $size"

            # Table info
            print_subheader "Table Information"
            execute_sql "
                SELECT
                    name as table_name,
                    type
                FROM sqlite_master
                WHERE type IN ('table', 'view')
                ORDER BY name;
            "

            # Page count and size
            local page_count=$(execute_sql "PRAGMA page_count;" true)
            local page_size=$(execute_sql "PRAGMA page_size;" true)
            local total_pages=$((page_count * page_size))
            log "Total Pages: $page_count"
            log "Page Size: $page_size bytes"
            log "Total Size: $total_pages bytes"
        fi
    fi
}

# List tables with row counts
show_tables() {
    print_header "Database Tables"

    if [ -n "$TABLE_NAME" ]; then
        print_subheader "Table: $TABLE_NAME"
        show_table_details "$TABLE_NAME"
        return
    fi

    if [ "$DB_TYPE" = "postgresql" ]; then
        execute_sql "
            SELECT
                schemaname,
                tablename,
                n_tup_ins as inserts,
                n_tup_upd as updates,
                n_tup_del as deletes,
                n_live_tup as live_rows,
                n_dead_tup as dead_rows,
                last_vacuum,
                last_analyze
            FROM pg_stat_user_tables
            ORDER BY schemaname, tablename;
        "
    elif [ "$DB_TYPE" = "sqlite" ]; then
        execute_sql "
            SELECT
                name as table_name,
                type,
                sql
            FROM sqlite_master
            WHERE type = 'table'
            AND name NOT LIKE 'sqlite_%'
            ORDER BY name;
        "
    fi
}

# Show table details
show_table_details() {
    local table_name="$1"

    if [ "$DB_TYPE" = "postgresql" ]; then
        print_subheader "Table Structure"
        execute_sql "
            SELECT
                column_name,
                data_type,
                is_nullable,
                column_default,
                character_maximum_length
            FROM information_schema.columns
            WHERE table_name = '$table_name'
            ORDER BY ordinal_position;
        "

        print_subheader "Table Statistics"
        execute_sql "
            SELECT
                schemaname,
                tablename,
                n_live_tup as live_rows,
                n_dead_tup as dead_rows,
                n_tup_ins as total_inserts,
                n_tup_upd as total_updates,
                n_tup_del as total_deletes,
                last_vacuum,
                last_autovacuum,
                last_analyze,
                last_autoanalyze
            FROM pg_stat_user_tables
            WHERE tablename = '$table_name';
        "

    elif [ "$DB_TYPE" = "sqlite" ]; then
        print_subheader "Table Structure"
        execute_sql "PRAGMA table_info($table_name);"

        print_subheader "Row Count"
        local row_count=$(execute_sql "SELECT COUNT(*) FROM $table_name;" true)
        log "Total Rows: $row_count"
    fi
}

# Show index information
show_indexes() {
    print_header "Database Indexes"

    if [ "$DB_TYPE" = "postgresql" ]; then
        local where_clause=""
        if [ -n "$TABLE_NAME" ]; then
            where_clause="WHERE tablename = '$TABLE_NAME'"
        fi

        execute_sql "
            SELECT
                schemaname,
                tablename,
                indexname,
                indexdef,
                pg_size_pretty(pg_relation_size(indexrelid)) as size
            FROM pg_indexes
            $where_clause
            ORDER BY schemaname, tablename, indexname;
        "

        print_subheader "Index Usage Statistics"
        execute_sql "
            SELECT
                schemaname,
                tablename,
                indexname,
                idx_scan as scans,
                idx_tup_read as tuples_read,
                idx_tup_fetch as tuples_fetched
            FROM pg_stat_user_indexes
            $where_clause
            ORDER BY idx_scan DESC;
        "

    elif [ "$DB_TYPE" = "sqlite" ]; then
        local where_clause=""
        if [ -n "$TABLE_NAME" ]; then
            where_clause="WHERE tbl_name = '$TABLE_NAME'"
        fi

        execute_sql "
            SELECT
                name as index_name,
                tbl_name as table_name,
                sql
            FROM sqlite_master
            WHERE type = 'index'
            AND name NOT LIKE 'sqlite_%'
            $where_clause
            ORDER BY tbl_name, name;
        "
    fi
}

# Show constraints
show_constraints() {
    print_header "Database Constraints"

    if [ "$DB_TYPE" = "postgresql" ]; then
        local where_clause=""
        if [ -n "$TABLE_NAME" ]; then
            where_clause="AND tc.table_name = '$TABLE_NAME'"
        fi

        execute_sql "
            SELECT
                tc.constraint_name,
                tc.table_name,
                tc.constraint_type,
                kcu.column_name,
                ccu.table_name AS foreign_table_name,
                ccu.column_name AS foreign_column_name
            FROM information_schema.table_constraints AS tc
            JOIN information_schema.key_column_usage AS kcu
                ON tc.constraint_name = kcu.constraint_name
            LEFT JOIN information_schema.constraint_column_usage AS ccu
                ON ccu.constraint_name = tc.constraint_name
            WHERE tc.table_schema = 'public'
            $where_clause
            ORDER BY tc.table_name, tc.constraint_type, tc.constraint_name;
        "

    elif [ "$DB_TYPE" = "sqlite" ]; then
        if [ -n "$TABLE_NAME" ]; then
            execute_sql "PRAGMA foreign_key_list($TABLE_NAME);"
        else
            log_warn "SQLite constraint information requires table name"
        fi
    fi
}

# Show database users (PostgreSQL only)
show_users() {
    print_header "Database Users"

    if [ "$DB_TYPE" = "postgresql" ]; then
        execute_sql "
            SELECT
                usename as username,
                usesysid as user_id,
                usecreatedb as can_create_db,
                usesuper as is_superuser,
                userepl as can_replicate,
                passwd as password_set,
                valuntil as valid_until
            FROM pg_user
            ORDER BY usename;
        "

        print_subheader "User Privileges"
        execute_sql "
            SELECT
                grantee,
                table_catalog,
                table_schema,
                table_name,
                privilege_type,
                is_grantable
            FROM information_schema.role_table_grants
            WHERE table_schema = 'public'
            ORDER BY grantee, table_name;
        "
    else
        log_warn "User information only available for PostgreSQL"
    fi
}

# Show active sessions
show_sessions() {
    print_header "Active Database Sessions"

    if [ "$DB_TYPE" = "postgresql" ]; then
        execute_sql "
            SELECT
                pid,
                usename,
                application_name,
                client_addr,
                client_port,
                backend_start,
                query_start,
                state,
                LEFT(query, 100) as current_query
            FROM pg_stat_activity
            WHERE pid <> pg_backend_pid()
            ORDER BY backend_start;
        "
    else
        log_warn "Session information only available for PostgreSQL"
    fi
}

# Show current locks
show_locks() {
    print_header "Current Database Locks"

    if [ "$DB_TYPE" = "postgresql" ]; then
        execute_sql "
            SELECT
                l.locktype,
                l.database,
                l.relation,
                l.page,
                l.tuple,
                l.virtualxid,
                l.transactionid,
                l.mode,
                l.granted,
                a.usename,
                a.query,
                a.query_start,
                a.pid
            FROM pg_locks l
            LEFT JOIN pg_stat_activity a ON l.pid = a.pid
            ORDER BY l.granted, l.pid;
        "
    else
        log_warn "Lock information only available for PostgreSQL"
    fi
}

# Show running queries
show_queries() {
    print_header "Running Queries"

    if [ "$DB_TYPE" = "postgresql" ]; then
        execute_sql "
            SELECT
                pid,
                usename,
                application_name,
                client_addr,
                now() - query_start as duration,
                state,
                query
            FROM pg_stat_activity
            WHERE state = 'active'
            AND pid <> pg_backend_pid()
            ORDER BY query_start;
        "
    else
        log_warn "Query information only available for PostgreSQL"
    fi
}

# Kill a specific query
kill_query() {
    local query_id="$1"

    if [ -z "$query_id" ]; then
        log_error "Query ID is required"
        return 1
    fi

    if [ "$DB_TYPE" = "postgresql" ]; then
        if [ "$FORCE" != "true" ]; then
            echo -n "Kill query with PID $query_id? (y/N): "
            read -r confirm
            if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
                log "Query kill cancelled"
                return 0
            fi
        fi

        local result=$(execute_sql "SELECT pg_terminate_backend($query_id);" true)
        if [ "$result" = "t" ]; then
            log_success "Query $query_id terminated"
        else
            log_error "Failed to terminate query $query_id"
        fi
    else
        log_warn "Query termination only available for PostgreSQL"
    fi
}

# Optimize database
optimize_database() {
    print_header "Database Optimization"

    if [ "$DRY_RUN" = "true" ]; then
        log "Would perform database optimization (VACUUM, ANALYZE)"
        return
    fi

    if [ "$DB_TYPE" = "postgresql" ]; then
        log "Running VACUUM ANALYZE..."
        execute_sql "VACUUM ANALYZE;"
        log_success "Database optimization completed"

        # Show updated statistics
        log "Updated table statistics:"
        execute_sql "
            SELECT
                schemaname,
                tablename,
                last_vacuum,
                last_analyze
            FROM pg_stat_user_tables
            WHERE last_vacuum IS NOT NULL OR last_analyze IS NOT NULL
            ORDER BY GREATEST(last_vacuum, last_analyze) DESC
            LIMIT 10;
        "

    elif [ "$DB_TYPE" = "sqlite" ]; then
        log "Running VACUUM..."
        execute_sql "VACUUM;"
        log "Running ANALYZE..."
        execute_sql "ANALYZE;"
        log_success "Database optimization completed"
    fi
}

# Rebuild indexes
rebuild_indexes() {
    print_header "Rebuilding Database Indexes"

    if [ "$DRY_RUN" = "true" ]; then
        log "Would rebuild all database indexes"
        return
    fi

    if [ "$DB_TYPE" = "postgresql" ]; then
        log "Running REINDEX DATABASE..."
        execute_sql "REINDEX DATABASE $DB_NAME;"
        log_success "Index rebuild completed"
    elif [ "$DB_TYPE" = "sqlite" ]; then
        log "Running REINDEX..."
        execute_sql "REINDEX;"
        log_success "Index rebuild completed"
    fi
}

# Check database integrity
check_integrity() {
    print_header "Database Integrity Check"

    if [ "$DB_TYPE" = "postgresql" ]; then
        # Check for corruption
        log "Checking for table corruption..."
        execute_sql "
            SELECT
                schemaname,
                tablename,
                n_dead_tup,
                n_live_tup,
                CASE
                    WHEN n_live_tup = 0 THEN 0
                    ELSE round((n_dead_tup::float / n_live_tup::float) * 100, 2)
                END as bloat_ratio
            FROM pg_stat_user_tables
            WHERE n_dead_tup > 0
            ORDER BY bloat_ratio DESC;
        "

        # Check for missing indexes on foreign keys
        log "Checking for missing indexes on foreign keys..."
        execute_sql "
            SELECT
                c.conrelid::regclass as table_name,
                string_agg(a.attname, ', ') as columns,
                'Missing index on foreign key' as issue
            FROM pg_constraint c
            JOIN pg_attribute a ON a.attnum = ANY(c.conkey) AND a.attrelid = c.conrelid
            WHERE c.contype = 'f'
            AND NOT EXISTS (
                SELECT 1 FROM pg_index i
                WHERE i.indrelid = c.conrelid
                AND c.conkey[1:array_length(c.conkey,1)] <@ i.indkey[0:array_length(i.indkey,1)]
            )
            GROUP BY c.conrelid, c.conname;
        "

    elif [ "$DB_TYPE" = "sqlite" ]; then
        log "Running integrity check..."
        local result=$(execute_sql "PRAGMA integrity_check;" true)
        if [ "$result" = "ok" ]; then
            log_success "Database integrity check passed"
        else
            log_error "Database integrity issues found: $result"
        fi
    fi
}

# Clean up temporary data
cleanup_database() {
    print_header "Database Cleanup"

    if [ "$DRY_RUN" = "true" ]; then
        log "Would clean up temporary database data"
        return
    fi

    # Clean up temporary directories
    if [ -d "$TEMP_DIR" ]; then
        log "Cleaning temporary directory..."
        rm -rf "$TEMP_DIR"/*
        log_success "Temporary files cleaned"
    fi

    # Clean up old log files
    if [ -d "$LOGS_DIR" ]; then
        log "Cleaning old log files..."
        find "$LOGS_DIR" -name "*.log" -mtime +$LOG_RETENTION_DAYS -delete
        log_success "Old log files cleaned"
    fi

    # Database-specific cleanup
    if [ "$DB_TYPE" = "postgresql" ]; then
        log "Cleaning expired sessions..."
        execute_sql "
            SELECT pg_terminate_backend(pid)
            FROM pg_stat_activity
            WHERE state = 'idle'
            AND query_start < now() - interval '1 hour';
        " >/dev/null 2>&1 || true
        log_success "Expired sessions cleaned"
    fi
}

# Test database connection
test_connection() {
    print_header "Database Connection Test"

    local start_time=$(date +%s%3N)

    if [ "$DB_TYPE" = "postgresql" ]; then
        export PGPASSWORD="$DB_PASS"
        if pg_isready -h "$DB_HOST" -p "$DB_PORT" -U "$DB_USER" >/dev/null 2>&1; then
            log_success "PostgreSQL server is accepting connections"

            # Test actual query
            if execute_sql "SELECT 1;" >/dev/null 2>&1; then
                local end_time=$(date +%s%3N)
                local response_time=$((end_time - start_time))
                log_success "Database connection successful (${response_time}ms)"
            else
                log_error "Database connection failed"
            fi
        else
            log_error "PostgreSQL server is not accepting connections"
        fi
        unset PGPASSWORD

    elif [ "$DB_TYPE" = "sqlite" ]; then
        if [ -f "$DB_FILE" ]; then
            if execute_sql "SELECT 1;" >/dev/null 2>&1; then
                local end_time=$(date +%s%3N)
                local response_time=$((end_time - start_time))
                log_success "SQLite database accessible (${response_time}ms)"
            else
                log_error "SQLite database access failed"
            fi
        else
            log_error "SQLite database file not found: $DB_FILE"
        fi
    fi
}

# Find duplicate data
find_duplicates() {
    local table_name="$1"

    if [ -z "$table_name" ]; then
        log_error "Table name is required for duplicate detection"
        return 1
    fi

    print_header "Finding Duplicate Data in $table_name"

    if [ "$DB_TYPE" = "postgresql" ]; then
        # Get table columns
        local columns=$(execute_sql "
            SELECT string_agg(column_name, ', ')
            FROM information_schema.columns
            WHERE table_name = '$table_name'
            AND column_name NOT IN ('id', 'created_at', 'updated_at');
        " true)

        if [ -n "$columns" ]; then
            execute_sql "
                SELECT $columns, COUNT(*) as duplicate_count
                FROM $table_name
                GROUP BY $columns
                HAVING COUNT(*) > 1
                ORDER BY duplicate_count DESC
                LIMIT $LIMIT;
            "
        else
            log_warn "No suitable columns found for duplicate detection"
        fi

    elif [ "$DB_TYPE" = "sqlite" ]; then
        # Basic duplicate detection for SQLite
        execute_sql "
            SELECT *, COUNT(*) as duplicate_count
            FROM $table_name
            GROUP BY *
            HAVING COUNT(*) > 1
            LIMIT $LIMIT;
        "
    fi
}

# Run database benchmarks
run_benchmarks() {
    print_header "Database Benchmarks"

    log "Running basic performance tests..."

    # Simple INSERT benchmark
    local start_time=$(date +%s%3N)
    execute_sql "
        CREATE TEMP TABLE benchmark_test (
            id SERIAL PRIMARY KEY,
            data TEXT,
            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
        );
    " >/dev/null 2>&1

    # Insert test data
    for i in {1..1000}; do
        execute_sql "INSERT INTO benchmark_test (data) VALUES ('test_data_$i');" >/dev/null 2>&1
    done

    local end_time=$(date +%s%3N)
    local insert_time=$((end_time - start_time))
    log "1000 INSERTs completed in ${insert_time}ms"

    # SELECT benchmark
    start_time=$(date +%s%3N)
    execute_sql "SELECT COUNT(*) FROM benchmark_test;" >/dev/null 2>&1
    end_time=$(date +%s%3N)
    local select_time=$((end_time - start_time))
    log "COUNT query completed in ${select_time}ms"

    # Cleanup
    execute_sql "DROP TABLE benchmark_test;" >/dev/null 2>&1

    log_success "Benchmark completed"
}

# Parse command line arguments
COMMAND=""
ENVIRONMENT="dev"
TABLE_NAME=""
SCHEMA_NAME=""
QUERY_ID=""
LIMIT=100
OUTPUT_FORMAT="table"
OUTPUT_FILE=""
FORCE="false"
DEBUG="false"
QUIET="false"
DRY_RUN="false"

while [[ $# -gt 0 ]]; do
    case $1 in
        --env)
            ENVIRONMENT="$2"
            shift 2
            ;;
        --table)
            TABLE_NAME="$2"
            shift 2
            ;;
        --schema)
            SCHEMA_NAME="$2"
            shift 2
            ;;
        --query-id)
            QUERY_ID="$2"
            shift 2
            ;;
        --limit)
            LIMIT="$2"
            shift 2
            ;;
        --output)
            OUTPUT_FORMAT="$2"
            shift 2
            ;;
        --file)
            OUTPUT_FILE="$2"
            shift 2
            ;;
        --force)
            FORCE="true"
            shift
            ;;
        --debug)
            DEBUG="true"
            shift
            ;;
        --quiet)
            QUIET="true"
            shift
            ;;
        --dry-run)
            DRY_RUN="true"
            shift
            ;;
        -h|--help)
            print_usage
            exit 0
            ;;
        *)
            if [ -z "$COMMAND" ]; then
                COMMAND="$1"
            else
                log_error "Unknown option: $1"
                print_usage
                exit 1
            fi
            shift
            ;;
    esac
done

# Set environment variable
export ENVIRONMENT="$ENVIRONMENT"

# Validate command
if [ -z "$COMMAND" ]; then
    print_usage
    exit 1
fi

# Check if we're in the right directory
if [ ! -f "Cargo.toml" ]; then
    log_error "Please run this script from the project root directory"
    exit 1
fi

# Load environment and parse database URL
load_env
parse_database_url

# Setup directories
setup_directories

# Execute command
case "$COMMAND" in
    "size")
        show_database_size
        ;;
    "tables")
        show_tables
        ;;
    "indexes")
        show_indexes
        ;;
    "constraints")
        show_constraints
        ;;
    "users")
        show_users
        ;;
    "permissions")
        show_users
        ;;
    "sessions")
        show_sessions
        ;;
    "locks")
        show_locks
        ;;
    "queries")
        show_queries
        ;;
    "kill-query")
        kill_query "$QUERY_ID"
        ;;
    "optimize")
        optimize_database
        ;;
    "reindex")
        rebuild_indexes
        ;;
    "check-integrity")
        check_integrity
        ;;
    "repair")
        log_warn "Database repair not yet implemented"
        ;;
    "cleanup")
        cleanup_database
        ;;
    "logs")
        log_warn "Database log viewing not yet implemented"
        ;;
    "config")
        log_warn "Database configuration display not yet implemented"
        ;;
    "extensions")
        log_warn "Extension listing not yet implemented"
        ;;
    "sequences")
        log_warn "Sequence information not yet implemented"
        ;;
    "triggers")
        log_warn "Trigger information not yet implemented"
        ;;
    "functions")
        log_warn "Function information not yet implemented"
        ;;
    "views")
        log_warn "View information not yet implemented"
        ;;
    "schema-info")
        show_database_size
        show_tables
        show_indexes
        show_constraints
        ;;
    "duplicate-data")
        find_duplicates "$TABLE_NAME"
        ;;
    "orphaned-data")
        log_warn "Orphaned data detection not yet implemented"
        ;;
    "table-stats")
        show_table_details "$TABLE_NAME"
        ;;
    "connection-test")
        test_connection
        ;;
    "benchmark")
        run_benchmarks
        ;;
    "export-schema")
        log_warn "Schema export not yet implemented"
        ;;
    "import-schema")
        log_warn "Schema import not yet implemented"
        ;;
    "copy-table")
        log_warn "Table copy not yet implemented"
        ;;
    "truncate-table")
        if [ -n "$TABLE_NAME" ]; then
            if [ "$FORCE" != "true" ]; then
                echo -n "This will delete all data in table '$TABLE_NAME'. Continue? (y/N): "
                read -r confirm
                if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
                    log "Truncate cancelled"
                    exit 0
                fi
            fi
            execute_sql "TRUNCATE TABLE $TABLE_NAME;"
            log_success "Table $TABLE_NAME truncated"
        else
            log_error "Table name is required"
        fi
        ;;
    "reset-sequence")
        log_warn "Sequence reset not yet implemented"
        ;;
    *)
        log_error "Unknown command: $COMMAND"
        print_usage
        exit 1
        ;;
esac