"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 __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (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;
};
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 (_) 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 __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var wasi_1 = __importStar(require("@wapython/wasi"));
var reuseInFlight_1 = __importDefault(require("./reuseInFlight"));
var instance_1 = __importDefault(require("./instance"));
var textDecoder = new TextDecoder();
function recvString(wasm, ptr, len) {
    var slice = wasm.exports.memory.buffer.slice(ptr, ptr + len);
    return textDecoder.decode(slice);
}
var cache = {};
function doWasmImport(name, // this is only used for caching and printing
source, // contents of the .wasm file or promise returned by fetch (in browser).
bindings, options) {
    if (options === void 0) { options = {}; }
    return __awaiter(this, void 0, void 0, function () {
        var t, wasmEnv, wasmOpts, wasm, wasi, fs, opts, result, typedArray;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    if (cache[name] != null) {
                        return [2 /*return*/, cache[name]];
                    }
                    t = new Date().valueOf();
                    wasmEnv = {
                        reportError: function (ptr, len) {
                            // @ts-ignore
                            var slice = result.instance.exports.memory.buffer.slice(ptr, ptr + len);
                            var textDecoder = new TextDecoder();
                            throw Error(textDecoder.decode(slice));
                        },
                    };
                    wasmOpts = { env: __assign(__assign({}, wasmEnv), options.wasmEnv) };
                    if (wasmOpts.env.wasmSendString == null) {
                        wasmOpts.env.wasmSendString = function (ptr, len) {
                            wasm.result = recvString(wasm, ptr, len);
                        };
                    }
                    if (wasmOpts.env.getrandom == null) {
                        wasmOpts.env.getrandom = function (bufPtr, bufLen, _flags) {
                            // NOTE: returning 0 here (our default stub behavior)
                            // would result in Python hanging on startup!
                            bindings.randomFillSync(
                            // @ts-ignore
                            new Uint8Array(result.instance.exports.memory.buffer), bufPtr, bufLen);
                            return bufLen;
                        };
                    }
                    if (wasmOpts.env.getpid == null) {
                        wasmOpts.env.getpid = function () {
                            if (options.traceStubcalls) {
                                stub("getpid", "returning 1", [], options.traceStubcalls == "first");
                            }
                            return 1;
                        };
                    }
                    if (wasmOpts.env.main == null) {
                        wasmOpts.env.main = function () {
                            return 0;
                        };
                    }
                    wasi = undefined;
                    fs = undefined;
                    if (!(options === null || options === void 0 ? void 0 : options.noWasi)) {
                        opts = {
                            preopens: { "/": "/" },
                            bindings: bindings,
                            args: process.argv,
                            env: options.env,
                            traceSyscalls: options.traceSyscalls,
                        };
                        if (options.fs != null) {
                            // explicit fs option given, so create the bindings.fs object, which is typically
                            // a union of several filesystems...
                            fs = (0, wasi_1.createFileSystem)(options.fs, bindings);
                            opts.bindings = __assign(__assign({}, bindings), { fs: fs });
                        }
                        wasi = new wasi_1.default(opts);
                        wasmOpts.wasi_snapshot_preview1 = wasi.wasiImport;
                    }
                    wasmOpts.env = new Proxy(wasmOpts.env, {
                        get: function (target, key) {
                            if (key in target) {
                                // console.log("using existing stub for ", key);
                                return Reflect.get(target, key);
                            }
                            // console.log("creating stub for", key);
                            if (options.traceStubcalls) {
                                return function () {
                                    var args = [];
                                    for (var _i = 0; _i < arguments.length; _i++) {
                                        args[_i] = arguments[_i];
                                    }
                                    stub(key, "returning 0", args, options.traceStubcalls == "first");
                                    return 0;
                                };
                            }
                            else {
                                // faster to not trace or even check, obviously.
                                return function () { return 0; };
                            }
                        },
                    });
                    if (source == null) {
                        throw Error("source must be defined for now...");
                    }
                    if (!(source instanceof Promise)) return [3 /*break*/, 2];
                    return [4 /*yield*/, WebAssembly.instantiateStreaming(source, wasmOpts)];
                case 1:
                    // This is in a web browser, which has WebAssembly.instantiateStreaming
                    // whereas node doesn't.
                    result = _a.sent();
                    return [3 /*break*/, 4];
                case 2:
                    typedArray = new Uint8Array(source);
                    return [4 /*yield*/, WebAssembly.instantiate(typedArray, wasmOpts)];
                case 3:
                    result = _a.sent();
                    _a.label = 4;
                case 4:
                    if (wasi != null) {
                        wasi.start(result.instance);
                    }
                    if (result.instance.exports.__wasm_call_ctors != null) {
                        // We also **MUST** explicitly call the WASM constructors. This is
                        // a library function that is part of the zig libc code.  We have
                        // to call this because the wasm file is built using build-lib, so
                        // there is no main that does this.  This call does things like
                        // setup the filesystem mapping.    Yes, it took me **days**
                        // to figure this out, including reading a lot of assembly code. :shrug:
                        result.instance.exports.__wasm_call_ctors();
                    }
                    wasm = new instance_1.default(result.instance.exports, fs);
                    if (!(options.init != null)) return [3 /*break*/, 6];
                    return [4 /*yield*/, options.init(wasm)];
                case 5:
                    _a.sent();
                    _a.label = 6;
                case 6:
                    cache[name] = wasm;
                    if (options.time) {
                        console.log("imported ".concat(name, " in ").concat(new Date().valueOf() - t, "ms"));
                    }
                    return [2 /*return*/, wasm];
            }
        });
    });
}
var wasmImport = (0, reuseInFlight_1.default)(doWasmImport, {
    createKey: function (args) { return args[0]; },
});
exports.default = wasmImport;
var stubUsed = new Set([]);
function stub(functionName, behavior, args, firstOnly) {
    if (firstOnly) {
        if (stubUsed.has(functionName))
            return;
        stubUsed.add(functionName);
    }
    console.log("WARNING STUB - ".concat(functionName, ": "), behavior, args);
}
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