text: "use strict";
  var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
      if (k2 === undefined) k2 = k;
      Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
  }) : (function(o, m, k, k2) {
      if (k2 === undefined) k2 = k;
      o[k2] = m[k];
  }));
  var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
      Object.defineProperty(o, "default", { enumerable: true, value: v });
  }) : function(o, v) {
      o["default"] = v;
  });
  var __importStar = (this && this.__importStar) || function (mod) {
      if (mod && mod.__esModule) return mod;
      var result = {};
      if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
      __setModuleDefault(result, mod);
      return result;
  };
  Object.defineProperty(exports, "__esModule", { value: true });
  const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
  const util = __importStar(require("../util"));
  const getMemberExpressionName = (member) => {
      if (!member.computed) {
          return member.property.name;
      }
      if (member.property.type === experimental_utils_1.AST_NODE_TYPES.Literal &&
          typeof member.property.value === 'string') {
          return member.property.value;
      }
      return null;
  };
  exports.default = util.createRule({
      name: 'prefer-reduce-type-parameter',
      meta: {
          type: 'problem',
          docs: {
              recommended: false,
              description: 'Prefer using type parameter when calling `Array#reduce` instead of casting',
              requiresTypeChecking: true,
          },
          messages: {
              preferTypeParameter: 'Unnecessary cast: Array#reduce accepts a type parameter for the default value.',
          },
          fixable: 'code',
          schema: [],
      },
      defaultOptions: [],
      create(context) {
          const service = util.getParserServices(context);
          const checker = service.program.getTypeChecker();
          return {
              'CallExpression > MemberExpression.callee'(callee) {
                  if (getMemberExpressionName(callee) !== 'reduce') {
                      return;
                  }
                  const [, secondArg] = callee.parent.arguments;
                  if (callee.parent.arguments.length < 2 ||
                      !util.isTypeAssertion(secondArg)) {
                      return;
                  }
                  // Get the symbol of the `reduce` method.
                  const tsNode = service.esTreeNodeToTSNodeMap.get(callee.object);
                  const calleeObjType = util.getConstrainedTypeAtLocation(checker, tsNode);
                  // Check the owner type of the `reduce` method.
                  if (checker.isArrayType(calleeObjType)) {
                      context.report({
                          messageId: 'preferTypeParameter',
                          node: secondArg,
                          fix: fixer => {
                              const fixes = [
                                  fixer.removeRange([
                                      secondArg.range[0],
                                      secondArg.expression.range[0],
                                  ]),
                                  fixer.removeRange([
                                      secondArg.expression.range[1],
                                      secondArg.range[1],
                                  ]),
                              ];
                              if (!callee.parent.typeParameters) {
                                  fixes.push(fixer.insertTextAfter(callee, `<${context
                                      .getSourceCode()
                                      .getText(secondArg.typeAnnotation)}>`));
                              }
                              return fixes;
                          },
                      });
                      return;
                  }
              },
          };
      },
  });
  //# sourceMappingURL=prefer-reduce-type-parameter.js.map