import jscodeshift from 'jscodeshift';

function removeImport(name, root, j) {
  // Find the import or require statement for 'is-boolean-object'
  const importDeclaration = root.find(j.ImportDeclaration, {
    source: { value: name },
  });

  const requireDeclaration = root
    .find(j.CallExpression, {
      callee: { name: "require" },
      arguments: [{ value: name }],
    })
    .closest(j.VariableDeclarator);

  // Require statements without declarations like `Object.is = require("object-is");`
  const requireAssignment = root.find(j.AssignmentExpression, {
    operator: "=",
    right: {
      callee: { name: "require" },
      arguments: [{ value: name }],
    },
  });

  // Side effect requires statements like `require("error-cause/auto");`
  const sideEffectRequireExpression = root.find(j.ExpressionStatement, {
    expression: {
      callee: { name: "require", },
      arguments: [ { value: name, }, ],
    },
  });

  // Return the identifier name, e.g. 'fn' in `import { fn } from 'is-boolean-object'`
  // or `var fn = require('is-boolean-object')`
  const identifier =
    importDeclaration.paths().length > 0
      ? importDeclaration.get().node.specifiers[0].local.name
      : requireDeclaration.paths().length > 0
      ? requireDeclaration.find(j.Identifier).get().node.name
      : requireAssignment.paths().length > 0
      ? requireAssignment.find(j.Identifier).get().node.name
      : null;

  importDeclaration.remove();
  requireDeclaration.remove();
  requireAssignment.remove();
  sideEffectRequireExpression.remove();

  const dirtyFlag =
    importDeclaration.length > 0 ||
    requireDeclaration.length > 0 ||
    requireAssignment.length > 0 ||
    sideEffectRequireExpression.length > 0;

  return { identifier, dirtyFlag };
}

function transform(file, { j }, options) {
  const root = j(file.source);
  removeImport('abort-controller', root, j);
  return root.toSource(options);
}

export default transform;