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"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getTypeAnnotation = getTypeAnnotation;
exports._getTypeAnnotation = _getTypeAnnotation;
exports.isBaseType = isBaseType;
exports.couldBeBaseType = couldBeBaseType;
exports.baseTypeStrictlyMatches = baseTypeStrictlyMatches;
exports.isGenericType = isGenericType;

var inferers = require("./inferers");

var _t = require("@babel/types");

const {
  anyTypeAnnotation,
  isAnyTypeAnnotation,
  isBooleanTypeAnnotation,
  isEmptyTypeAnnotation,
  isFlowBaseAnnotation,
  isGenericTypeAnnotation,
  isIdentifier,
  isMixedTypeAnnotation,
  isNumberTypeAnnotation,
  isStringTypeAnnotation,
  isTypeAnnotation,
  isUnionTypeAnnotation,
  isVoidTypeAnnotation,
  stringTypeAnnotation,
  voidTypeAnnotation
} = _t;

function getTypeAnnotation() {
  if (this.typeAnnotation) return this.typeAnnotation;
  let type = this._getTypeAnnotation() || anyTypeAnnotation();
  if (isTypeAnnotation(type)) type = type.typeAnnotation;
  return this.typeAnnotation = type;
}

const typeAnnotationInferringNodes = new WeakSet();

function _getTypeAnnotation() {
  const node = this.node;

  if (!node) {
    if (this.key === "init" && this.parentPath.isVariableDeclarator()) {
      const declar = this.parentPath.parentPath;
      const declarParent = declar.parentPath;

      if (declar.key === "left" && declarParent.isForInStatement()) {
        return stringTypeAnnotation();
      }

      if (declar.key === "left" && declarParent.isForOfStatement()) {
        return anyTypeAnnotation();
      }

      return voidTypeAnnotation();
    } else {
      return;
    }
  }

  if (node.typeAnnotation) {
    return node.typeAnnotation;
  }

  if (typeAnnotationInferringNodes.has(node)) {
    return;
  }

  typeAnnotationInferringNodes.add(node);

  try {
    var _inferer;

    let inferer = inferers[node.type];

    if (inferer) {
      return inferer.call(this, node);
    }

    inferer = inferers[this.parentPath.type];

    if ((_inferer = inferer) != null && _inferer.validParent) {
      return this.parentPath.getTypeAnnotation();
    }
  } finally {
    typeAnnotationInferringNodes.delete(node);
  }
}

function isBaseType(baseName, soft) {
  return _isBaseType(baseName, this.getTypeAnnotation(), soft);
}

function _isBaseType(baseName, type, soft) {
  if (baseName === "string") {
    return isStringTypeAnnotation(type);
  } else if (baseName === "number") {
    return isNumberTypeAnnotation(type);
  } else if (baseName === "boolean") {
    return isBooleanTypeAnnotation(type);
  } else if (baseName === "any") {
    return isAnyTypeAnnotation(type);
  } else if (baseName === "mixed") {
    return isMixedTypeAnnotation(type);
  } else if (baseName === "empty") {
    return isEmptyTypeAnnotation(type);
  } else if (baseName === "void") {
    return isVoidTypeAnnotation(type);
  } else {
    if (soft) {
      return false;
    } else {
      throw new Error(`Unknown base type ${baseName}`);
    }
  }
}

function couldBeBaseType(name) {
  const type = this.getTypeAnnotation();
  if (isAnyTypeAnnotation(type)) return true;

  if (isUnionTypeAnnotation(type)) {
    for (const type2 of type.types) {
      if (isAnyTypeAnnotation(type2) || _isBaseType(name, type2, true)) {
        return true;
      }
    }

    return false;
  } else {
    return _isBaseType(name, type, true);
  }
}

function baseTypeStrictlyMatches(rightArg) {
  const left = this.getTypeAnnotation();
  const right = rightArg.getTypeAnnotation();

  if (!isAnyTypeAnnotation(left) && isFlowBaseAnnotation(left)) {
    return right.type === left.type;
  }

  return false;
}

function isGenericType(genericName) {
  const type = this.getTypeAnnotation();
  return isGenericTypeAnnotation(type) && isIdentifier(type.id, {
    name: genericName
  });
}