import {createGenerator} from 'ts-json-schema-generator';
import {getValidatableTypes} from './get-validatable-types.js';
import {JSONSchema7} from 'json-schema';

/**
 * Compile the JSON schema for a path
 */
export function compileSchema(path: string, tsconfig: string): [schma: JSONSchema7, type: string] {
  const generator = createGenerator({
    path,
    tsconfig,
    extraTags: ['elasticsearch'],
    skipTypeCheck: true,
  });
  // @ts-expect-error private access
  const program = generator.program;
  const schemaNames = getValidatableTypes(program);
  const fullSchema = {
    $schema: 'http://json-schema.org/draft-07/schema#',
    definitions: {},
  };

  for (const schema of schemaNames) {
    Object.assign(fullSchema.definitions, generator.createSchema(schema).definitions);
  }

  const schemaTypes = `import {JSONSchema7} from 'json-schema';\n\nexport interface SchemaMap {\n${[
    ...schemaNames,
  ]
    .map(schemaName => `  '${schemaName}': core.${schemaName};`)
    .join('\n')}\n}\n\nconst schema: JSONSchema7;\nexport default schema;`;

  return [fullSchema, schemaTypes];
}