// we use that regex as a separator when splitting template and don't want to capture variables

import type { TxInterpretationVariable } from 'types/api/txInterpretation';

// eslint-disable-next-line regexp/no-useless-non-capturing-group
export const VAR_REGEXP = /\{(?:[^}]+)\}/g;

export const NATIVE_COIN_SYMBOL_VAR_NAME = 'native';
export const WEI_VAR_NAME = 'wei';

export function extractVariables(templateString: string) {

  const matches = templateString.match(VAR_REGEXP);

  const variablesNames = matches ? matches.map(match => match.slice(1, -1)) : [];

  return variablesNames;
}

export function getStringChunks(template: string) {
  return template.split(VAR_REGEXP);
}

export function checkSummary(template: string, variables: Record<string, TxInterpretationVariable>) {
  const variablesNames = extractVariables(template);
  let result = true;
  for (const name of variablesNames) {
    if (name === NATIVE_COIN_SYMBOL_VAR_NAME || name === WEI_VAR_NAME) {
      continue;
    }
    if (!variables[name] || variables[name].value === undefined || variables[name].value === null) {
      result = false;
      break;
    }
  }

  return result;
}

export function fillStringVariables(template: string, variables: Record<string, TxInterpretationVariable>) {
  const variablesNames = extractVariables(template);

  let result = template;
  variablesNames.forEach(name => {
    if (variables[name] && variables[name].type === 'string') {
      result = result.replace(`{${ name }}`, variables[name].value as string);
    }
  });

  return result;
}