"use strict";
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (g && (g = 0, op[0] && (_ = 0)), _) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
        if (ar || !(i in from)) {
            if (!ar) ar = Array.prototype.slice.call(from, 0, i);
            ar[i] = from[i];
        }
    }
    return to.concat(ar || Array.prototype.slice.call(from));
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.JSONRPCServer = void 0;
var models_1 = require("./models");
var internal_1 = require("./internal");
var createParseErrorResponse = function () {
    return (0, models_1.createJSONRPCErrorResponse)(null, models_1.JSONRPCErrorCode.ParseError, "Parse error");
};
var createInvalidRequestResponse = function (request) {
    return (0, models_1.createJSONRPCErrorResponse)((0, models_1.isJSONRPCID)(request.id) ? request.id : null, models_1.JSONRPCErrorCode.InvalidRequest, "Invalid Request");
};
var createMethodNotFoundResponse = function (id) {
    return (0, models_1.createJSONRPCErrorResponse)(id, models_1.JSONRPCErrorCode.MethodNotFound, "Method not found");
};
var JSONRPCServer = /** @class */ (function () {
    function JSONRPCServer(options) {
        if (options === void 0) { options = {}; }
        var _a;
        this.mapErrorToJSONRPCErrorResponse = defaultMapErrorToJSONRPCErrorResponse;
        this.nameToMethodDictionary = {};
        this.middleware = null;
        this.errorListener = (_a = options.errorListener) !== null && _a !== void 0 ? _a : console.warn;
    }
    JSONRPCServer.prototype.hasMethod = function (name) {
        return !!this.nameToMethodDictionary[name];
    };
    JSONRPCServer.prototype.addMethod = function (name, method) {
        this.addMethodAdvanced(name, this.toJSONRPCMethod(method));
    };
    JSONRPCServer.prototype.removeMethod = function (name) {
        delete this.nameToMethodDictionary[name];
    };
    JSONRPCServer.prototype.toJSONRPCMethod = function (method) {
        return function (request, serverParams) {
            var response = method(request.params, serverParams);
            return Promise.resolve(response).then(function (result) {
                return mapResultToJSONRPCResponse(request.id, result);
            });
        };
    };
    JSONRPCServer.prototype.addMethodAdvanced = function (name, method) {
        var _a;
        this.nameToMethodDictionary = __assign(__assign({}, this.nameToMethodDictionary), (_a = {}, _a[name] = method, _a));
    };
    JSONRPCServer.prototype.receiveJSON = function (json, serverParams) {
        var request = this.tryParseRequestJSON(json);
        if (request) {
            return this.receive(request, serverParams);
        }
        else {
            return Promise.resolve(createParseErrorResponse());
        }
    };
    JSONRPCServer.prototype.tryParseRequestJSON = function (json) {
        try {
            return JSON.parse(json);
        }
        catch (_a) {
            return null;
        }
    };
    JSONRPCServer.prototype.receive = function (request, serverParams) {
        if (Array.isArray(request)) {
            return this.receiveMultiple(request, serverParams);
        }
        else {
            return this.receiveSingle(request, serverParams);
        }
    };
    JSONRPCServer.prototype.receiveMultiple = function (requests, serverParams) {
        return __awaiter(this, void 0, void 0, function () {
            var responses;
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, Promise.all(requests.map(function (request) { return _this.receiveSingle(request, serverParams); }))];
                    case 1:
                        responses = (_a.sent()).filter(isNonNull);
                        if (responses.length === 1) {
                            return [2 /*return*/, responses[0]];
                        }
                        else if (responses.length) {
                            return [2 /*return*/, responses];
                        }
                        else {
                            return [2 /*return*/, null];
                        }
                        return [2 /*return*/];
                }
            });
        });
    };
    JSONRPCServer.prototype.receiveSingle = function (request, serverParams) {
        return __awaiter(this, void 0, void 0, function () {
            var method, response;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        method = this.nameToMethodDictionary[request.method];
                        if (!!(0, models_1.isJSONRPCRequest)(request)) return [3 /*break*/, 1];
                        return [2 /*return*/, createInvalidRequestResponse(request)];
                    case 1: return [4 /*yield*/, this.callMethod(method, request, serverParams)];
                    case 2:
                        response = _a.sent();
                        return [2 /*return*/, mapResponse(request, response)];
                }
            });
        });
    };
    JSONRPCServer.prototype.applyMiddleware = function () {
        var middlewares = [];
        for (var _i = 0; _i < arguments.length; _i++) {
            middlewares[_i] = arguments[_i];
        }
        if (this.middleware) {
            this.middleware = this.combineMiddlewares(__spreadArray([
                this.middleware
            ], middlewares, true));
        }
        else {
            this.middleware = this.combineMiddlewares(middlewares);
        }
    };
    JSONRPCServer.prototype.combineMiddlewares = function (middlewares) {
        if (!middlewares.length) {
            return null;
        }
        else {
            return middlewares.reduce(this.middlewareReducer);
        }
    };
    JSONRPCServer.prototype.middlewareReducer = function (prevMiddleware, nextMiddleware) {
        return function (next, request, serverParams) {
            return prevMiddleware(function (request, serverParams) { return nextMiddleware(next, request, serverParams); }, request, serverParams);
        };
    };
    JSONRPCServer.prototype.callMethod = function (method, request, serverParams) {
        var _this = this;
        var callMethod = function (request, serverParams) {
            if (method) {
                return method(request, serverParams);
            }
            else if (request.id !== undefined) {
                return Promise.resolve(createMethodNotFoundResponse(request.id));
            }
            else {
                return Promise.resolve(null);
            }
        };
        var onError = function (error) {
            _this.errorListener("An unexpected error occurred while executing \"".concat(request.method, "\" JSON-RPC method:"), error);
            return Promise.resolve(_this.mapErrorToJSONRPCErrorResponseIfNecessary(request.id, error));
        };
        try {
            return (this.middleware || noopMiddleware)(callMethod, request, serverParams).then(undefined, onError);
        }
        catch (error) {
            return onError(error);
        }
    };
    JSONRPCServer.prototype.mapErrorToJSONRPCErrorResponseIfNecessary = function (id, error) {
        if (id !== undefined) {
            return this.mapErrorToJSONRPCErrorResponse(id, error);
        }
        else {
            return null;
        }
    };
    return JSONRPCServer;
}());
exports.JSONRPCServer = JSONRPCServer;
var isNonNull = function (value) { return value !== null; };
var noopMiddleware = function (next, request, serverParams) { return next(request, serverParams); };
var mapResultToJSONRPCResponse = function (id, result) {
    if (id !== undefined) {
        return (0, models_1.createJSONRPCSuccessResponse)(id, result);
    }
    else {
        return null;
    }
};
var defaultMapErrorToJSONRPCErrorResponse = function (id, error) {
    var _a;
    var message = (_a = error === null || error === void 0 ? void 0 : error.message) !== null && _a !== void 0 ? _a : "An unexpected error occurred";
    var code = internal_1.DefaultErrorCode;
    var data;
    if (error instanceof models_1.JSONRPCErrorException) {
        code = error.code;
        data = error.data;
    }
    return (0, models_1.createJSONRPCErrorResponse)(id, code, message, data);
};
var mapResponse = function (request, response) {
    if (response) {
        return response;
    }
    else if (request.id !== undefined) {
        return (0, models_1.createJSONRPCErrorResponse)(request.id, models_1.JSONRPCErrorCode.InternalError, "Internal error");
    }
    else {
        return null;
    }
};