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Object.defineProperty(exports, "__esModule", { value: true });
exports.resolveIEV = void 0;
var fs_1 = require("fs");
var path = __importStar(require("path"));
var recast_1 = require("recast");
var ts_map_1 = __importDefault(require("ts-map"));
var hash_sum_1 = __importDefault(require("hash-sum"));
var babel_parser_1 = __importDefault(require("../babel-parser"));
var cacher_1 = __importDefault(require("./cacher"));
var resolveImmediatelyExported_1 = __importDefault(require("./resolveImmediatelyExported"));
/**
 * Recursively resolves specified variables to their actual files
 * Useful when using intermediary files like this
 *
 * ```js
 * export mixin from "path/to/mixin"
 * ```
 *
 * @param pathResolver function to resolve relative to absolute path
 * @param varToFilePath set of variables to be resolved (will be mutated into the final mapping)
 */
function recursiveResolveIEV(pathResolver, varToFilePath, validExtends) {
    return __awaiter(this, void 0, void 0, function () {
        var hashes;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    hashes = new Set();
                    _a.label = 1;
                case 1: 
                // in this case I need to resolve IEV in sequence in case they are defined multiple times
                // eslint-disable-next-line no-await-in-loop
                return [4 /*yield*/, resolveIEV(pathResolver, varToFilePath, validExtends)
                    // we iterate until there is no change in the set of variables or there is a loop
                ];
                case 2:
                    // in this case I need to resolve IEV in sequence in case they are defined multiple times
                    // eslint-disable-next-line no-await-in-loop
                    _a.sent();
                    _a.label = 3;
                case 3:
                    if (!hashes.has((0, hash_sum_1.default)(varToFilePath)) && hashes.add((0, hash_sum_1.default)(varToFilePath))) return [3 /*break*/, 1];
                    _a.label = 4;
                case 4: return [2 /*return*/];
            }
        });
    });
}
exports.default = recursiveResolveIEV;
/**
 * Resolves specified variables to their actual files
 * Useful when using intermediary files like this
 *
 * ```js
 * export mixin from "path/to/mixin"
 * export * from "path/to/another/mixin"
 * ```
 *
 * @param pathResolver function to resolve relative to absolute path
 * @param varToFilePath set of variables to be resolved (will be mutated into the final mapping)
 */
function resolveIEV(pathResolver, varToFilePath, validExtends) {
    return __awaiter(this, void 0, void 0, function () {
        var filePathToVars;
        var _this = this;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    filePathToVars = new ts_map_1.default();
                    Object.keys(varToFilePath).forEach(function (k) {
                        // the only way a variable can be exported by multiple files
                        // is if one of those files is exported as follows
                        // export * from 'path/to/file'
                        var exportedVariable = varToFilePath[k];
                        exportedVariable.filePath.forEach(function (filePath, i) {
                            var exportToLocalMap = filePathToVars.get(filePath) || new ts_map_1.default();
                            exportToLocalMap.set(k, exportedVariable.exportName);
                            filePathToVars.set(filePath, exportToLocalMap);
                        });
                    });
                    // then roll though this map and replace varToFilePath elements with their final destinations
                    // {
                    //	nameOfVariable: { filePath:['filesWhereToFindIt'], exportedName:'nameUsedInExportThatCanBeUsedForFiltering' }
                    // }
                    return [4 /*yield*/, Promise.all(filePathToVars.entries().map(function (_a) {
                            var _b = __read(_a, 2), filePath = _b[0], exportToLocal = _b[1];
                            return __awaiter(_this, void 0, void 0, function () {
                                var exportedVariableNames_1, fullFilePath_1, source_1, astRemote, returnedVariables_1, e_1;
                                return __generator(this, function (_c) {
                                    switch (_c.label) {
                                        case 0:
                                            if (!(filePath && exportToLocal)) return [3 /*break*/, 4];
                                            exportedVariableNames_1 = [];
                                            exportToLocal.forEach(function (exportedName) {
                                                if (exportedName) {
                                                    exportedVariableNames_1.push(exportedName);
                                                }
                                            });
                                            _c.label = 1;
                                        case 1:
                                            _c.trys.push([1, 3, , 4]);
                                            fullFilePath_1 = pathResolver(filePath);
                                            if (!fullFilePath_1 || !validExtends(fullFilePath_1)) {
                                                // if the file is not in scope of the analysis, skip it
                                                // if no variable export corresponds to this local name, we delete it at the very end
                                                return [2 /*return*/];
                                            }
                                            return [4 /*yield*/, fs_1.promises.readFile(fullFilePath_1, {
                                                    encoding: 'utf-8'
                                                })];
                                        case 2:
                                            source_1 = _c.sent();
                                            astRemote = (0, cacher_1.default)(function () { return (0, recast_1.parse)(source_1, { parser: (0, babel_parser_1.default)() }); }, source_1);
                                            returnedVariables_1 = (0, resolveImmediatelyExported_1.default)(astRemote, exportedVariableNames_1).variables;
                                            if (Object.keys(returnedVariables_1).length) {
                                                exportToLocal.forEach(function (exported, local) {
                                                    var aliasedVariable = returnedVariables_1[exported];
                                                    if (aliasedVariable) {
                                                        aliasedVariable.filePath = aliasedVariable.filePath
                                                            .map(function (p) { return pathResolver(p, path.dirname(fullFilePath_1)); })
                                                            .filter(function (a) { return a; });
                                                        varToFilePath[local] = aliasedVariable;
                                                    }
                                                });
                                            }
                                            return [3 /*break*/, 4];
                                        case 3:
                                            e_1 = _c.sent();
                                            return [3 /*break*/, 4];
                                        case 4: return [2 /*return*/];
                                    }
                                });
                            });
                        }))];
                case 1:
                    // then roll though this map and replace varToFilePath elements with their final destinations
                    // {
                    //	nameOfVariable: { filePath:['filesWhereToFindIt'], exportedName:'nameUsedInExportThatCanBeUsedForFiltering' }
                    // }
                    _a.sent();
                    return [2 /*return*/];
            }
        });
    });
}
exports.resolveIEV = resolveIEV;