"use strict";
/* --------------------------------------------------------------------------------------------
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 * ------------------------------------------------------------------------------------------ */
Object.defineProperty(exports, "__esModule", { value: true });
exports.WorkspaceFoldersFeature = exports.arrayDiff = void 0;
const UUID = require("./utils/uuid");
const vscode_1 = require("vscode");
const vscode_languageserver_protocol_1 = require("vscode-languageserver-protocol");
function access(target, key) {
    if (target === undefined || target === null) {
        return undefined;
    }
    return target[key];
}
function arrayDiff(left, right) {
    return left.filter(element => right.indexOf(element) < 0);
}
exports.arrayDiff = arrayDiff;
class WorkspaceFoldersFeature {
    constructor(client) {
        this._client = client;
        this._listeners = new Map();
    }
    getState() {
        return { kind: 'workspace', id: this.registrationType.method, registrations: this._listeners.size > 0 };
    }
    get registrationType() {
        return vscode_languageserver_protocol_1.DidChangeWorkspaceFoldersNotification.type;
    }
    fillInitializeParams(params) {
        const folders = vscode_1.workspace.workspaceFolders;
        this.initializeWithFolders(folders);
        if (folders === void 0) {
            params.workspaceFolders = null;
        }
        else {
            params.workspaceFolders = folders.map(folder => this.asProtocol(folder));
        }
    }
    initializeWithFolders(currentWorkspaceFolders) {
        this._initialFolders = currentWorkspaceFolders;
    }
    fillClientCapabilities(capabilities) {
        capabilities.workspace = capabilities.workspace || {};
        capabilities.workspace.workspaceFolders = true;
    }
    initialize(capabilities) {
        const client = this._client;
        client.onRequest(vscode_languageserver_protocol_1.WorkspaceFoldersRequest.type, (token) => {
            const workspaceFolders = () => {
                const folders = vscode_1.workspace.workspaceFolders;
                if (folders === undefined) {
                    return null;
                }
                const result = folders.map((folder) => {
                    return this.asProtocol(folder);
                });
                return result;
            };
            const middleware = client.middleware.workspace;
            return middleware && middleware.workspaceFolders
                ? middleware.workspaceFolders(token, workspaceFolders)
                : workspaceFolders(token);
        });
        const value = access(access(access(capabilities, 'workspace'), 'workspaceFolders'), 'changeNotifications');
        let id;
        if (typeof value === 'string') {
            id = value;
        }
        else if (value === true) {
            id = UUID.generateUuid();
        }
        if (id) {
            this.register({ id: id, registerOptions: undefined });
        }
    }
    sendInitialEvent(currentWorkspaceFolders) {
        let promise;
        if (this._initialFolders && currentWorkspaceFolders) {
            const removed = arrayDiff(this._initialFolders, currentWorkspaceFolders);
            const added = arrayDiff(currentWorkspaceFolders, this._initialFolders);
            if (added.length > 0 || removed.length > 0) {
                promise = this.doSendEvent(added, removed);
            }
        }
        else if (this._initialFolders) {
            promise = this.doSendEvent([], this._initialFolders);
        }
        else if (currentWorkspaceFolders) {
            promise = this.doSendEvent(currentWorkspaceFolders, []);
        }
        if (promise !== undefined) {
            promise.catch((error) => {
                this._client.error(`Sending notification ${vscode_languageserver_protocol_1.DidChangeWorkspaceFoldersNotification.type.method} failed`, error);
            });
        }
    }
    doSendEvent(addedFolders, removedFolders) {
        let params = {
            event: {
                added: addedFolders.map(folder => this.asProtocol(folder)),
                removed: removedFolders.map(folder => this.asProtocol(folder))
            }
        };
        return this._client.sendNotification(vscode_languageserver_protocol_1.DidChangeWorkspaceFoldersNotification.type, params);
    }
    register(data) {
        let id = data.id;
        let client = this._client;
        let disposable = vscode_1.workspace.onDidChangeWorkspaceFolders((event) => {
            let didChangeWorkspaceFolders = (event) => {
                return this.doSendEvent(event.added, event.removed);
            };
            let middleware = client.middleware.workspace;
            const promise = middleware && middleware.didChangeWorkspaceFolders
                ? middleware.didChangeWorkspaceFolders(event, didChangeWorkspaceFolders)
                : didChangeWorkspaceFolders(event);
            promise.catch((error) => {
                this._client.error(`Sending notification ${vscode_languageserver_protocol_1.DidChangeWorkspaceFoldersNotification.type.method} failed`, error);
            });
        });
        this._listeners.set(id, disposable);
        this.sendInitialEvent(vscode_1.workspace.workspaceFolders);
    }
    unregister(id) {
        let disposable = this._listeners.get(id);
        if (disposable === void 0) {
            return;
        }
        this._listeners.delete(id);
        disposable.dispose();
    }
    clear() {
        for (let disposable of this._listeners.values()) {
            disposable.dispose();
        }
        this._listeners.clear();
    }
    asProtocol(workspaceFolder) {
        if (workspaceFolder === void 0) {
            return null;
        }
        return { uri: this._client.code2ProtocolConverter.asUri(workspaceFolder.uri), name: workspaceFolder.name };
    }
}
exports.WorkspaceFoldersFeature = WorkspaceFoldersFeature;