const visited = 'visitedByDebugTargetTransformer';

const warningDevCheckTemplate = `
  process.env.NODE_ENV !== 'production' ? NODE : undefined
`.trim();

const plugin = ({ template, types: t }) => {
  const wrapWithDevCheck = template.expression(warningDevCheckTemplate, {
    placeholderPattern: /^NODE$/,
  });

  let name = 'unknownExchange';

  return {
    visitor: {
      ExportNamedDeclaration(path) {
        if (
          path.node.declaration &&
          path.node.declaration.declarations &&
          path.node.declaration.declarations[0] &&
          path.node.declaration.declarations[0].id
        ) {
          const exportName = path.node.declaration.declarations[0].id.name;
          if (/Exchange$/i.test(exportName)) name = exportName;
        }
      },
      CallExpression(path, meta) {
        if (path.node[visited] || !path.node.callee) return;

        if (path.node.callee.name === 'dispatchDebug') {
          path.node[visited] = true;
          if (
            t.isObjectExpression(path.node.arguments[0]) &&
            !meta.filename.endsWith('compose.ts')
          ) {
            path.node.arguments[0].properties.push(
              t.objectProperty(t.stringLiteral('source'), t.stringLiteral(name))
            );
          }

          path.replaceWith(wrapWithDevCheck({ NODE: path.node }));
        }
      },
    },
  };
};

export default plugin;