import type { ConfigDefinition, ConfigDefinitionElement } from 'figue';
import { isArray, isEmpty, isNil } from 'lodash-es';
import { configDefinition } from '../../papra-server/src/modules/config/config';

function walk(configDefinition: ConfigDefinition, path: string[] = []): (ConfigDefinitionElement & { path: string[] })[] {
  return Object
    .entries(configDefinition)
    .flatMap(([key, value]) => {
      if ('schema' in value) {
        return [{ ...value, path: [...path, key] }] as (ConfigDefinitionElement & { path: string[] })[];
      }

      return walk(value, [...path, key]);
    });
}

const configDetails = walk(configDefinition);

function formatDoc(doc: string | undefined): string {
  const coerced = (doc ?? '').trim();

  if (coerced.endsWith('.')) {
    return coerced;
  }

  return `${coerced}.`;
}

const rows = configDetails
  .filter(({ path }) => path[0] !== 'env')
  .map(({ doc, default: defaultValue, env, path }) => {
    const isEmptyDefaultValue = isNil(defaultValue) || (isArray(defaultValue) && isEmpty(defaultValue)) || defaultValue === '';

    const rawDocumentation = formatDoc(doc);

    return {
      path,
      env,
      documentation: rawDocumentation,
      defaultValue: isEmptyDefaultValue ? undefined : defaultValue,
    };
  });

const mdSections = rows.map(({ documentation, env, path, defaultValue }) => `
###  ${env}
${documentation}

- Path: \`${path.join('.')}\`
- Environment variable: \`${env}\`
- Default value: \`${defaultValue}\`


`.trim()).join('\n\n---\n\n');

export { mdSections };