"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _helperPluginUtils = require("@babel/helper-plugin-utils");
var _core = require("@babel/core");
var _default = (0, _helperPluginUtils.declare)(api => {
  api.assertVersion(7);
  function isProtoKey(node) {
    return !_core.types.isSpreadElement(node) && _core.types.isStringLiteral(_core.types.toComputedKey(node, node.key), {
      value: "__proto__"
    });
  }
  function isProtoAssignmentExpression(node) {
    const left = node;
    return _core.types.isMemberExpression(left) && _core.types.isStringLiteral(_core.types.toComputedKey(left, left.property), {
      value: "__proto__"
    });
  }
  function buildDefaultsCallExpression(expr, ref, file) {
    return _core.types.expressionStatement(_core.types.callExpression(file.addHelper("defaults"), [ref, expr.right]));
  }
  return {
    name: "transform-proto-to-assign",
    visitor: {
      AssignmentExpression(path, {
        file
      }) {
        if (!isProtoAssignmentExpression(path.node.left)) return;
        const nodes = [];
        const left = path.node.left.object;
        const temp = path.scope.maybeGenerateMemoised(left);
        if (temp) {
          nodes.push(_core.types.expressionStatement(_core.types.assignmentExpression("=", temp, left)));
        }
        nodes.push(buildDefaultsCallExpression(path.node, _core.types.cloneNode(temp || left), file));
        if (temp) nodes.push(_core.types.cloneNode(temp));
        path.replaceWithMultiple(nodes);
      },
      ExpressionStatement(path, {
        file
      }) {
        const expr = path.node.expression;
        if (!_core.types.isAssignmentExpression(expr, {
          operator: "="
        })) return;
        if (isProtoAssignmentExpression(expr.left)) {
          path.replaceWith(buildDefaultsCallExpression(expr, expr.left.object, file));
        }
      },
      ObjectExpression(path, {
        file
      }) {
        let proto;
        const {
          node
        } = path;
        const {
          properties
        } = node;
        for (let i = 0; i < properties.length; i++) {
          const prop = properties[i];
          if (isProtoKey(prop)) {
            proto = prop.value;
            properties.splice(i, 1);
            break;
          }
        }
        if (proto) {
          const args = [_core.types.objectExpression([]), proto];
          if (node.properties.length) args.push(node);
          path.replaceWith(_core.types.callExpression(file.addHelper("extends"), args));
        }
      }
    }
  };
});
exports.default = _default;

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