import path from 'path';
import fs from 'fs';
// eslint-disable-next-line import/no-extraneous-dependencies
import { toPascalCase, resetFile, appendFile } from '@lucide/helpers';
import { deprecationReasonTemplate } from '../utils/deprecationReasonTemplate.mjs';

const getImportString = (
  componentName,
  iconName,
  aliasImportFileExtension,
  deprecated,
  deprecationReason = '',
) =>
  deprecated
    ? `export {\n` +
      `  /** @deprecated ${deprecationReason} */\n` +
      `  default as ${componentName}\n` +
      `} from './icons/${iconName}${aliasImportFileExtension}';\n`
    : `export { default as ${componentName} } from './icons/${iconName}${aliasImportFileExtension}';\n`;

export default async function generateAliasesFile({
  iconNodes,
  outputDirectory,
  fileExtension,
  iconFileExtension = '.js',
  iconMetaData,
  aliasImportFileExtension,
  aliasNamesOnly = false,
  separateAliasesFile = false,
  showLog = true,
}) {
  const iconsDistDirectory = path.join(outputDirectory, `icons`);
  const fileName = path.basename(`aliases${fileExtension}`);
  const icons = Object.keys(iconNodes);

  // Reset file
  resetFile(fileName, outputDirectory);

  // Generate Import for Icon VNodes
  await Promise.all(
    icons.map(async (iconName, index) => {
      const componentName = toPascalCase(iconName);
      const iconAliases = iconMetaData[iconName]?.aliases?.map((alias) => {
        if (typeof alias === 'string') {
          return {
            name: alias,
            deprecated: false,
          };
        }
        return alias;
      });

      let importString = '';

      if ((iconAliases != null && Array.isArray(iconAliases)) || !aliasNamesOnly) {
        if (index > 0) {
          importString += '\n';
        }

        importString += `// ${componentName} aliases\n`;
      }

      if (!aliasNamesOnly) {
        importString += getImportString(`${componentName}Icon`, iconName, aliasImportFileExtension);
        importString += getImportString(
          `Lucide${componentName}`,
          iconName,
          aliasImportFileExtension,
        );
      }

      if (iconAliases != null && Array.isArray(iconAliases)) {
        await Promise.all(
          iconAliases.map(async (alias) => {
            const componentNameAlias = toPascalCase(alias.name);
            const deprecationReason = alias.deprecated
              ? deprecationReasonTemplate(alias.deprecationReason, {
                  componentName: toPascalCase(iconName),
                  iconName,
                  toBeRemovedInVersion: alias.toBeRemovedInVersion,
                })
              : '';

            if (separateAliasesFile) {
              const output = `export { default } from "./${iconName}"`;
              const location = path.join(iconsDistDirectory, `${alias.name}${iconFileExtension}`);

              await fs.promises.writeFile(location, output, 'utf-8');
            }

            // Don't import the same icon twice
            if (componentName === componentNameAlias) {
              return;
            }

            const exportFileIcon = separateAliasesFile ? alias.name : iconName;

            importString += getImportString(
              componentNameAlias,
              exportFileIcon,
              aliasImportFileExtension,
              alias.deprecated,
              deprecationReason,
            );

            if (!aliasNamesOnly) {
              importString += getImportString(
                `${componentNameAlias}Icon`,
                exportFileIcon,
                aliasImportFileExtension,
                alias.deprecated,
                deprecationReason,
              );

              importString += getImportString(
                `Lucide${componentNameAlias}`,
                exportFileIcon,
                aliasImportFileExtension,
                alias.deprecated,
                deprecationReason,
              );
            }
          }),
        );
      }

      appendFile(importString, fileName, outputDirectory);
    }),
  );

  appendFile('\n', fileName, outputDirectory);

  if (showLog) {
    console.log(`Successfully generated ${fileName} file`);
  }
}