mocktail-cli/src/utils/formatToSQL.ts

**Craft your data cocktail — realistic mock data, shaken not stirred.**

import type { Field } from '../types';

function escapeSqlValue(val: any): string {
  if (val === null || val === undefined) return 'NULL';
  if (typeof val === 'number') return String(val);
  if (typeof val === 'boolean') return val ? 'TRUE' : 'FALSE';
  if (val instanceof Date) return `'${val.toISOString()}'`;
  if (typeof val === 'object') return `'${JSON.stringify(val).replace(/'/g, "''")}'`;
  return `'${String(val).replace(/'/g, "''")}'`;
}

/**
 * Formats records into an SQL INSERT statement.
 *
 * @param modelName - Table name
 * @param records - Array of record objects
 * @param fieldsMeta - Optional Prisma model.fields array for filtering relations
 */
export function formatToSQL(modelName: string, records: Record<string, any>[], fieldsMeta: Field[] = []): string {
  if (!Array.isArray(records) || records.length === 0) return '';

  // Filter out relation fields if fieldsMeta provided
  let allowedColumns: string[];
  if (fieldsMeta.length > 0) {
    allowedColumns = fieldsMeta
      .filter(f => !f.isRelation)
      .map(f => f.name);
  } else {
    allowedColumns = Object.keys(records[0] || {});
  }

  const rows = records
    .map(record =>
      `(${allowedColumns.map(col => escapeSqlValue(record[col])).join(', ')})`
    )
    .join(',\n');

  return `INSERT INTO "${modelName}" (${allowedColumns.join(', ')}) VALUES\n${rows};`;
}

/**
 * Formats many-to-many join table inserts.
 *
 * @param joinTableName - join table name
 * @param records - array of objects with keys 'A' and 'B'
 */
export function formatJoinTableSQL(joinTableName: string, records: Array<{ A: string; B: string }>): string {
  if (!Array.isArray(records) || records.length === 0) return '';

  const columns = Object.keys(records[0] || {}); // usually ['A', 'B']

  const rows = records
    .map(record =>
      `(${columns.map(col => escapeSqlValue(record[col as keyof typeof record])).join(', ')})`
    )
    .join(',\n');

  return `INSERT INTO "${joinTableName}" (${columns.join(', ')}) VALUES\n${rows};`;
}