@@ -31,6 +31,23 @@ export interface IVirtualEnvironmentsSearchPathProvider {
     getSearchPaths(resource?: Uri): Promise<string[]>;
 }
 
+export const IComponentAdapter = Symbol('IComponentAdapter');
+export interface IComponentAdapter {
+    // IInterpreterLocatorService
+    hasInterpreters: Promise<boolean | undefined>;
+    getInterpreters(resource?: Uri): Promise<PythonEnvironment[] | undefined>;
+    // IInterpreterService
+    getInterpreterDetails(pythonPath: string, _resource?: Uri): Promise<undefined | PythonEnvironment>;
+    // IInterpreterHelper
+    getInterpreterInformation(pythonPath: string): Promise<undefined | Partial<PythonEnvironment>>;
+    isMacDefaultPythonPath(pythonPath: string): Promise<boolean | undefined>;
+    // ICondaService
+    isCondaEnvironment(interpreterPath: string): Promise<boolean | undefined>;
+    getCondaEnvironment(interpreterPath: string): Promise<CondaEnvironmentInfo | undefined>;
+    // IWindowsStoreInterpreter
+    isWindowsStoreInterpreter(pythonPath: string): Promise<boolean | undefined>;
+}
+
 export const IInterpreterLocatorService = Symbol('IInterpreterLocatorService');
 
 export interface IInterpreterLocatorService extends Disposable {
 
@@ -2,11 +2,16 @@
 // Licensed under the MIT License.
 
 import { injectable } from 'inversify';
+import * as vscode from 'vscode';
+import { createDeferred } from '../common/utils/async';
+import { Architecture } from '../common/utils/platform';
+import { getVersionString, parseVersion } from '../common/utils/version';
 import {
     CONDA_ENV_FILE_SERVICE,
     CONDA_ENV_SERVICE,
     CURRENT_PATH_SERVICE,
     GLOBAL_VIRTUAL_ENV_SERVICE,
+    IComponentAdapter,
     ICondaService,
     IInterpreterLocatorHelper,
     IInterpreterLocatorProgressService,
@@ -23,10 +28,13 @@ import {
 } from '../interpreter/contracts';
 import { IPipEnvServiceHelper, IPythonInPathCommandProvider } from '../interpreter/locators/types';
 import { IServiceContainer, IServiceManager } from '../ioc/types';
+import { PythonEnvInfo, PythonEnvKind, PythonReleaseLevel } from './base/info';
+import { ILocator, PythonLocatorQuery } from './base/locator';
 import { initializeExternalDependencies } from './common/externalDependencies';
 import { PythonInterpreterLocatorService } from './discovery/locators';
 import { InterpreterLocatorHelper } from './discovery/locators/helpers';
 import { InterpreterLocatorProgressService } from './discovery/locators/progressService';
+import { CondaEnvironmentInfo } from './discovery/locators/services/conda';
 import { CondaEnvFileService } from './discovery/locators/services/condaEnvFileService';
 import { CondaEnvService } from './discovery/locators/services/condaEnvService';
 import { CondaService } from './discovery/locators/services/condaService';
@@ -48,31 +56,285 @@ import {
     WorkspaceVirtualEnvService,
 } from './discovery/locators/services/workspaceVirtualEnvService';
 import { WorkspaceVirtualEnvWatcherService } from './discovery/locators/services/workspaceVirtualEnvWatcherService';
+import { EnvironmentType, PythonEnvironment } from './info';
 import { EnvironmentInfoService, IEnvironmentInfoService } from './info/environmentInfoService';
 
-import { PythonEnvironments } from '.';
+const convertedKinds = new Map(Object.entries({
+    [PythonEnvKind.System]: EnvironmentType.System,
+    [PythonEnvKind.MacDefault]: EnvironmentType.System,
+    [PythonEnvKind.WindowsStore]: EnvironmentType.WindowsStore,
+    [PythonEnvKind.Pyenv]: EnvironmentType.Pyenv,
+    [PythonEnvKind.Conda]: EnvironmentType.Conda,
+    [PythonEnvKind.CondaBase]: EnvironmentType.Conda,
+    [PythonEnvKind.VirtualEnv]: EnvironmentType.VirtualEnv,
+    [PythonEnvKind.Pipenv]: EnvironmentType.Pipenv,
+    [PythonEnvKind.Venv]: EnvironmentType.Venv,
+}));
 
-export const IComponentAdapter = Symbol('IComponentAdapter');
-export interface IComponentAdapter {
-    // We will fill in the API separately.
+function convertEnvInfo(info: PythonEnvInfo): PythonEnvironment {
+    const {
+        name,
+        location,
+        executable,
+        arch,
+        kind,
+        searchLocation,
+        version,
+        distro,
+    } = info;
+    const { filename, sysPrefix } = executable;
+    const env: PythonEnvironment = {
+        sysPrefix,
+        envType: EnvironmentType.Unknown,
+        envName: name,
+        envPath: location,
+        path: filename,
+        architecture: arch,
+    };
+
+    const envType = convertedKinds.get(kind);
+    if (envType !== undefined) {
+        env.envType = envType;
+    }
+    // Otherwise it stays Unknown.
+
+    if (searchLocation !== undefined) {
+        if (kind === PythonEnvKind.Pipenv) {
+            env.pipEnvWorkspaceFolder = searchLocation.fsPath;
+        }
+    }
+
+    if (version !== undefined) {
+        const { release, sysVersion } = version;
+        const { level, serial } = release;
+        const releaseStr = level === PythonReleaseLevel.Final
+            ? 'final'
+            : `${level}${serial}`;
+        const versionStr = `${getVersionString(version)}-${releaseStr}`;
+        env.version = parseVersion(versionStr);
+        env.sysVersion = sysVersion;
+    }
+
+    if (distro !== undefined && distro.org !== '') {
+        env.companyDisplayName = distro.org;
+    }
+    // We do not worry about using distro.defaultDisplayName
+    // or info.defaultDisplayName.
+
+    return env;
+}
+
+function buildEmptyEnvInfo(): PythonEnvInfo {
+    return {
+        id: '',
+        kind: PythonEnvKind.Unknown,
+        executable: {
+            filename: '',
+            sysPrefix: '',
+            ctime: -1,
+            mtime: -1,
+        },
+        name: '',
+        location: '',
+        version: {
+            major: -1,
+            minor: -1,
+            micro: -1,
+            release: {
+                level: PythonReleaseLevel.Final,
+                serial: 0,
+            },
+        },
+        arch: Architecture.Unknown,
+        distro: {
+            org: '',
+        },
+    };
 }
 
+interface IPythonEnvironments extends ILocator {}
+
 @injectable()
 class ComponentAdapter implements IComponentAdapter {
     constructor(
         // The adapter only wraps one thing: the component API.
-        private readonly api: PythonEnvironments
-    ) {
-        // For the moment we use this placeholder to exercise the property.
-        if (this.api.onChanged) {
-            this.api.onChanged((_event) => {
-                // do nothing
+        private readonly api: IPythonEnvironments,
+        // For now we effectively disable the component.
+        private readonly enabled = false,
+    ) {}
+
+    // IInterpreterHelper
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async getInterpreterInformation(pythonPath: string): Promise<undefined | Partial<PythonEnvironment>> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const env = await this.api.resolveEnv(pythonPath);
+        if (env === undefined) {
+            return undefined;
+        }
+        return convertEnvInfo(env);
+    }
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async isMacDefaultPythonPath(pythonPath: string): Promise<boolean | undefined> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const env = await this.api.resolveEnv(pythonPath);
+        if (env === undefined) {
+            return undefined;
+        }
+        return env.kind === PythonEnvKind.MacDefault;
+    }
+
+    // IInterpreterService
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public get hasInterpreters(): Promise<boolean | undefined> {
+        if (!this.enabled) {
+            return Promise.resolve(undefined);
+        }
+        const iterator = this.api.iterEnvs();
+        return iterator.next().then((res) => !res.done);
+    }
+
+    // We use the same getInterpreters() here as for IInterpreterLocatorService.
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async getInterpreterDetails(
+        pythonPath: string,
+        resource?: vscode.Uri,
+    ): Promise<undefined | PythonEnvironment> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const info = buildEmptyEnvInfo();
+        info.executable.filename = pythonPath;
+        if (resource !== undefined) {
+            const wsFolder = vscode.workspace.getWorkspaceFolder(resource);
+            if (wsFolder !== undefined) {
+                info.searchLocation = wsFolder.uri;
+            }
+        }
+        const env = await this.api.resolveEnv(info);
+        if (env === undefined) {
+            return undefined;
+        }
+        return convertEnvInfo(env);
+    }
+
+    // ICondaService
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async isCondaEnvironment(interpreterPath: string): Promise<boolean | undefined> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const env = await this.api.resolveEnv(interpreterPath);
+        if (env === undefined) {
+            return undefined;
+        }
+        return env.kind === PythonEnvKind.Conda;
+    }
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async getCondaEnvironment(interpreterPath: string): Promise<CondaEnvironmentInfo | undefined> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const env = await this.api.resolveEnv(interpreterPath);
+        if (env === undefined) {
+            return undefined;
+        }
+        if (env.kind !== PythonEnvKind.Conda) {
+            return undefined;
+        }
+        if (env.name !== '') {
+            return { name: env.name, path: '' };
+        }
+        // else
+        return { name: '', path: env.location };
+    }
+
+    // IWindowsStoreInterpreter
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async isWindowsStoreInterpreter(pythonPath: string): Promise<boolean | undefined> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const env = await this.api.resolveEnv(pythonPath);
+        if (env === undefined) {
+            return undefined;
+        }
+        return env.kind === PythonEnvKind.WindowsStore;
+    }
+
+    // IInterpreterLocatorService
+
+    // A result of `undefined` means "Fall back to the old code!"
+    public async getInterpreters(
+        resource?: vscode.Uri,
+        // Currently we have no plans to support GetInterpreterLocatorOptions:
+        // {
+        //     ignoreCache?: boolean
+        //     onSuggestion?: boolean;
+        // }
+    ): Promise<PythonEnvironment[] | undefined> {
+        if (!this.enabled) {
+            return undefined;
+        }
+        const query: PythonLocatorQuery = {};
+        if (resource !== undefined) {
+            const wsFolder = vscode.workspace.getWorkspaceFolder(resource);
+            if (wsFolder !== undefined) {
+                query.searchLocations = [wsFolder.uri];
+            }
+        }
+
+        const deferred = createDeferred<PythonEnvironment[]>();
+        const envs: PythonEnvironment[] = [];
+        const executableToLegacy: Record<string, PythonEnvironment> = {};
+        const iterator = this.api.iterEnvs(query);
+
+        if (iterator.onUpdated !== undefined) {
+            iterator.onUpdated((event) => {
+                if (event === null) {
+                    deferred.resolve(envs);
+                } else {
+                    // Replace the old one.
+                    const old = executableToLegacy[event.old.executable.filename];
+                    if (old !== undefined) {
+                        const index = envs.indexOf(old);
+                        if (index !== -1) {
+                            envs[index] = convertEnvInfo(event.new);
+                        }
+                    }
+                }
             });
+        } else {
+            deferred.resolve(envs);
         }
+
+        let res = await iterator.next();
+        while (!res.done) {
+            const env = convertEnvInfo(res.value);
+            envs.push(env);
+            executableToLegacy[env.path] = env;
+            res = await iterator.next(); // eslint-disable-line no-await-in-loop
+        }
+
+        return deferred.promise;
     }
 }
 
-export function registerForIOC(serviceManager: IServiceManager, serviceContainer: IServiceContainer, api: PythonEnvironments): void {
+export function registerForIOC(
+    serviceManager: IServiceManager,
+    serviceContainer: IServiceContainer,
+    api: IPythonEnvironments,
+): void {
     const adapter = new ComponentAdapter(api);
     serviceManager.addSingletonInstance<IComponentAdapter>(IComponentAdapter, adapter);