import firebase from '@firebase/app';
import { ErrorFactory, FirebaseError } from '@firebase/util';
import { openDb } from 'idb';

const version = "0.2.6";

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const PENDING_TIMEOUT_MS = 10000;
const PACKAGE_VERSION = `w:${version}`;
const INTERNAL_AUTH_VERSION = 'FIS_v2';
const INSTALLATIONS_API_URL = 'https://firebaseinstallations.googleapis.com/v1';
const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour
const SERVICE = 'installations';
const SERVICE_NAME = 'Installations';

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const ERROR_DESCRIPTION_MAP = {
    ["missing-app-config-values" /* MISSING_APP_CONFIG_VALUES */]: 'Missing App configuration values.',
    ["create-installation-failed" /* CREATE_INSTALLATION_FAILED */]: 'Could not register Firebase Installation.',
    ["generate-token-failed" /* GENERATE_TOKEN_FAILED */]: 'Could not generate Auth Token.',
    ["not-registered" /* NOT_REGISTERED */]: 'Firebase Installation is not registered.',
    ["installation-not-found" /* INSTALLATION_NOT_FOUND */]: 'Firebase Installation not found.',
    ["request-failed" /* REQUEST_FAILED */]: '{$requestName} request failed with error "{$serverCode} {$serverStatus}: {$serverMessage}"',
    ["app-offline" /* APP_OFFLINE */]: 'Could not process request. Application offline.',
    ["delete-pending-registration" /* DELETE_PENDING_REGISTRATION */]: "Can't delete installation while there is a pending registration request."
};
const ERROR_FACTORY = new ErrorFactory(SERVICE, SERVICE_NAME, ERROR_DESCRIPTION_MAP);
/** Returns true if error is a FirebaseError that is based on an error from the server. */
function isServerError(error) {
    return (error instanceof FirebaseError &&
        error.code.includes("request-failed" /* REQUEST_FAILED */));
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function extractAppConfig(app) {
    if (!app || !app.options) {
        throw ERROR_FACTORY.create("missing-app-config-values" /* MISSING_APP_CONFIG_VALUES */);
    }
    const appName = app.name;
    const { projectId, apiKey, appId } = app.options;
    if (!appName || !projectId || !apiKey || !appId) {
        throw ERROR_FACTORY.create("missing-app-config-values" /* MISSING_APP_CONFIG_VALUES */);
    }
    return { appName, projectId, apiKey, appId };
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function getInstallationsEndpoint({ projectId }) {
    return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;
}
function extractAuthTokenInfoFromResponse(response) {
    return {
        token: response.token,
        requestStatus: 2 /* COMPLETED */,
        expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),
        creationTime: Date.now()
    };
}
async function getErrorFromResponse(requestName, response) {
    const responseJson = await response.json();
    const errorData = responseJson.error;
    return ERROR_FACTORY.create("request-failed" /* REQUEST_FAILED */, {
        requestName,
        serverCode: errorData.code,
        serverMessage: errorData.message,
        serverStatus: errorData.status
    });
}
function getHeaders({ apiKey }) {
    return new Headers({
        'Content-Type': 'application/json',
        Accept: 'application/json',
        'x-goog-api-key': apiKey
    });
}
function getHeadersWithAuth(appConfig, { refreshToken }) {
    const headers = getHeaders(appConfig);
    headers.append('Authorization', getAuthorizationHeader(refreshToken));
    return headers;
}
/**
 * Calls the passed in fetch wrapper and returns the response.
 * If the returned response has a status of 5xx, re-runs the function once and
 * returns the response.
 */
async function retryIfServerError(fn) {
    const result = await fn();
    if (result.status >= 500 && result.status < 600) {
        // Internal Server Error. Retry request.
        return fn();
    }
    return result;
}
function getExpiresInFromResponseExpiresIn(responseExpiresIn) {
    // This works because the server will never respond with fractions of a second.
    return Number(responseExpiresIn.replace('s', '000'));
}
function getAuthorizationHeader(refreshToken) {
    return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
async function createInstallation(appConfig, { fid }) {
    const endpoint = getInstallationsEndpoint(appConfig);
    const headers = getHeaders(appConfig);
    const body = {
        fid,
        authVersion: INTERNAL_AUTH_VERSION,
        appId: appConfig.appId,
        sdkVersion: PACKAGE_VERSION
    };
    const request = {
        method: 'POST',
        headers,
        body: JSON.stringify(body)
    };
    const response = await retryIfServerError(() => fetch(endpoint, request));
    if (response.ok) {
        const responseValue = await response.json();
        const registeredInstallationEntry = {
            fid: responseValue.fid || fid,
            registrationStatus: 2 /* COMPLETED */,
            refreshToken: responseValue.refreshToken,
            authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)
        };
        return registeredInstallationEntry;
    }
    else {
        throw await getErrorFromResponse('Create Installation', response);
    }
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/** Returns a promise that resolves after given time passes. */
function sleep(ms) {
    return new Promise(resolve => {
        setTimeout(resolve, ms);
    });
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function bufferToBase64UrlSafe(array) {
    const b64 = btoa(String.fromCharCode(...array));
    return b64.replace(/\+/g, '-').replace(/\//g, '_');
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const VALID_FID_PATTERN = /^[cdef][\w-]{21}$/;
const INVALID_FID = '';
/**
 * Generates a new FID using random values from Web Crypto API.
 * Returns an empty string if FID generation fails for any reason.
 */
function generateFid() {
    try {
        // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5
        // bytes. our implementation generates a 17 byte array instead.
        const fidByteArray = new Uint8Array(17);
        const crypto = self.crypto || self.msCrypto;
        crypto.getRandomValues(fidByteArray);
        // Replace the first 4 random bits with the constant FID header of 0b0111.
        fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);
        const fid = encode(fidByteArray);
        return VALID_FID_PATTERN.test(fid) ? fid : INVALID_FID;
    }
    catch (_a) {
        // FID generation errored
        return INVALID_FID;
    }
}
/** Converts a FID Uint8Array to a base64 string representation. */
function encode(fidByteArray) {
    const b64String = bufferToBase64UrlSafe(fidByteArray);
    // Remove the 23rd character that was added because of the extra 4 bits at the
    // end of our 17 byte array, and the '=' padding.
    return b64String.substr(0, 22);
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
const DATABASE_NAME = 'firebase-installations-database';
const DATABASE_VERSION = 1;
const OBJECT_STORE_NAME = 'firebase-installations-store';
let dbPromise = null;
function getDbPromise() {
    if (!dbPromise) {
        dbPromise = openDb(DATABASE_NAME, DATABASE_VERSION, upgradeDB => {
            // We don't use 'break' in this switch statement, the fall-through
            // behavior is what we want, because if there are multiple versions between
            // the old version and the current version, we want ALL the migrations
            // that correspond to those versions to run, not only the last one.
            // eslint-disable-next-line default-case
            switch (upgradeDB.oldVersion) {
                case 0:
                    upgradeDB.createObjectStore(OBJECT_STORE_NAME);
            }
        });
    }
    return dbPromise;
}
/** Assigns or overwrites the record for the given key with the given value. */
async function set(appConfig, value) {
    const key = getKey(appConfig);
    const db = await getDbPromise();
    const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
    await tx.objectStore(OBJECT_STORE_NAME).put(value, key);
    await tx.complete;
    return value;
}
/** Removes record(s) from the objectStore that match the given key. */
async function remove(appConfig) {
    const key = getKey(appConfig);
    const db = await getDbPromise();
    const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
    await tx.objectStore(OBJECT_STORE_NAME).delete(key);
    await tx.complete;
}
/**
 * Atomically updates a record with the result of updateFn, which gets
 * called with the current value. If newValue is undefined, the record is
 * deleted instead.
 * @return Updated value
 */
async function update(appConfig, updateFn) {
    const key = getKey(appConfig);
    const db = await getDbPromise();
    const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');
    const store = tx.objectStore(OBJECT_STORE_NAME);
    const oldValue = await store.get(key);
    const newValue = updateFn(oldValue);
    if (newValue === oldValue) {
        return newValue;
    }
    if (newValue === undefined) {
        await store.delete(key);
    }
    else {
        await store.put(newValue, key);
    }
    await tx.complete;
    return newValue;
}
function getKey(appConfig) {
    return `${appConfig.appName}!${appConfig.appId}`;
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * Updates and returns the InstallationEntry from the database.
 * Also triggers a registration request if it is necessary and possible.
 */
async function getInstallationEntry(appConfig) {
    let registrationPromise;
    const installationEntry = await update(appConfig, (oldEntry) => {
        const installationEntry = updateOrCreateInstallationEntry(oldEntry);
        const entryWithPromise = triggerRegistrationIfNecessary(appConfig, installationEntry);
        registrationPromise = entryWithPromise.registrationPromise;
        return entryWithPromise.installationEntry;
    });
    if (installationEntry.fid === INVALID_FID) {
        // FID generation failed. Waiting for the FID from the server.
        return { installationEntry: await registrationPromise };
    }
    return {
        installationEntry,
        registrationPromise
    };
}
function updateOrCreateInstallationEntry(oldEntry) {
    const entry = oldEntry || {
        fid: generateFid(),
        registrationStatus: 0 /* NOT_STARTED */
    };
    if (hasInstallationRequestTimedOut(entry)) {
        return {
            fid: entry.fid,
            registrationStatus: 0 /* NOT_STARTED */
        };
    }
    return entry;
}
/**
 * If the Firebase Installation is not registered yet, this will trigger the registration
 * and return an InProgressInstallationEntry.
 */
function triggerRegistrationIfNecessary(appConfig, installationEntry) {
    if (installationEntry.registrationStatus === 0 /* NOT_STARTED */) {
        if (!navigator.onLine) {
            // Registration required but app is offline.
            const registrationPromiseWithError = Promise.reject(ERROR_FACTORY.create("app-offline" /* APP_OFFLINE */));
            return {
                installationEntry,
                registrationPromise: registrationPromiseWithError
            };
        }
        // Try registering. Change status to IN_PROGRESS.
        const inProgressEntry = {
            fid: installationEntry.fid,
            registrationStatus: 1 /* IN_PROGRESS */,
            registrationTime: Date.now()
        };
        const registrationPromise = registerInstallation(appConfig, inProgressEntry);
        return { installationEntry: inProgressEntry, registrationPromise };
    }
    else if (installationEntry.registrationStatus === 1 /* IN_PROGRESS */) {
        return {
            installationEntry,
            registrationPromise: waitUntilFidRegistration(appConfig)
        };
    }
    else {
        return { installationEntry };
    }
}
/** This will be executed only once for each new Firebase Installation. */
async function registerInstallation(appConfig, installationEntry) {
    try {
        const registeredInstallationEntry = await createInstallation(appConfig, installationEntry);
        return set(appConfig, registeredInstallationEntry);
    }
    catch (e) {
        if (isServerError(e) && e.serverCode === 409) {
            // Server returned a "FID can not be used" error.
            // Generate a new ID next time.
            await remove(appConfig);
        }
        else {
            // Registration failed. Set FID as not registered.
            await set(appConfig, {
                fid: installationEntry.fid,
                registrationStatus: 0 /* NOT_STARTED */
            });
        }
        throw e;
    }
}
/** Call if FID registration is pending. */
async function waitUntilFidRegistration(appConfig) {
    // Unfortunately, there is no way of reliably observing when a value in
    // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),
    // so we need to poll.
    let entry = await updateInstallationRequest(appConfig);
    while (entry.registrationStatus === 1 /* IN_PROGRESS */) {
        // createInstallation request still in progress.
        await sleep(100);
        entry = await updateInstallationRequest(appConfig);
    }
    if (entry.registrationStatus === 0 /* NOT_STARTED */) {
        throw ERROR_FACTORY.create("create-installation-failed" /* CREATE_INSTALLATION_FAILED */);
    }
    return entry;
}
/**
 * Called only if there is a CreateInstallation request in progress.
 *
 * Updates the InstallationEntry in the DB based on the status of the
 * CreateInstallation request.
 *
 * Returns the updated InstallationEntry.
 */
function updateInstallationRequest(appConfig) {
    return update(appConfig, (oldEntry) => {
        if (!oldEntry) {
            throw ERROR_FACTORY.create("installation-not-found" /* INSTALLATION_NOT_FOUND */);
        }
        if (hasInstallationRequestTimedOut(oldEntry)) {
            return {
                fid: oldEntry.fid,
                registrationStatus: 0 /* NOT_STARTED */
            };
        }
        return oldEntry;
    });
}
function hasInstallationRequestTimedOut(installationEntry) {
    return (installationEntry.registrationStatus === 1 /* IN_PROGRESS */ &&
        installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now());
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
async function generateAuthToken(appConfig, installationEntry) {
    const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);
    const headers = getHeadersWithAuth(appConfig, installationEntry);
    const body = {
        installation: {
            sdkVersion: PACKAGE_VERSION
        }
    };
    const request = {
        method: 'POST',
        headers,
        body: JSON.stringify(body)
    };
    const response = await retryIfServerError(() => fetch(endpoint, request));
    if (response.ok) {
        const responseValue = await response.json();
        const completedAuthToken = extractAuthTokenInfoFromResponse(responseValue);
        return completedAuthToken;
    }
    else {
        throw await getErrorFromResponse('Generate Auth Token', response);
    }
}
function getGenerateAuthTokenEndpoint(appConfig, { fid }) {
    return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * Returns a valid authentication token for the installation. Generates a new
 * token if one doesn't exist, is expired or about to expire.
 *
 * Should only be called if the Firebase Installation is registered.
 */
async function refreshAuthToken(appConfig) {
    let tokenPromise;
    const entry = await update(appConfig, (oldEntry) => {
        if (!isEntryRegistered(oldEntry)) {
            throw ERROR_FACTORY.create("not-registered" /* NOT_REGISTERED */);
        }
        const oldAuthToken = oldEntry.authToken;
        if (isAuthTokenValid(oldAuthToken)) {
            // There is a valid token in the DB.
            return oldEntry;
        }
        else if (oldAuthToken.requestStatus === 1 /* IN_PROGRESS */) {
            // There already is a token request in progress.
            tokenPromise = waitUntilAuthTokenRequest(appConfig);
            return oldEntry;
        }
        else {
            // No token or token expired.
            if (!navigator.onLine) {
                throw ERROR_FACTORY.create("app-offline" /* APP_OFFLINE */);
            }
            const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);
            tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);
            return inProgressEntry;
        }
    });
    const authToken = tokenPromise
        ? await tokenPromise
        : entry.authToken;
    return authToken.token;
}
/**
 * Call only if FID is registered and Auth Token request is in progress.
 */
async function waitUntilAuthTokenRequest(appConfig) {
    // Unfortunately, there is no way of reliably observing when a value in
    // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),
    // so we need to poll.
    let entry = await updateAuthTokenRequest(appConfig);
    while (entry.authToken.requestStatus === 1 /* IN_PROGRESS */) {
        // generateAuthToken still in progress.
        await sleep(100);
        entry = await updateAuthTokenRequest(appConfig);
    }
    const authToken = entry.authToken;
    if (authToken.requestStatus === 0 /* NOT_STARTED */) {
        throw ERROR_FACTORY.create("generate-token-failed" /* GENERATE_TOKEN_FAILED */);
    }
    else {
        return authToken;
    }
}
/**
 * Called only if there is a GenerateAuthToken request in progress.
 *
 * Updates the InstallationEntry in the DB based on the status of the
 * GenerateAuthToken request.
 *
 * Returns the updated InstallationEntry.
 */
function updateAuthTokenRequest(appConfig) {
    return update(appConfig, (oldEntry) => {
        if (!isEntryRegistered(oldEntry)) {
            throw ERROR_FACTORY.create("not-registered" /* NOT_REGISTERED */);
        }
        const oldAuthToken = oldEntry.authToken;
        if (hasAuthTokenRequestTimedOut(oldAuthToken)) {
            return Object.assign({}, oldEntry, { authToken: { requestStatus: 0 /* NOT_STARTED */ } });
        }
        return oldEntry;
    });
}
async function fetchAuthTokenFromServer(appConfig, installationEntry) {
    try {
        const authToken = await generateAuthToken(appConfig, installationEntry);
        const updatedInstallationEntry = Object.assign({}, installationEntry, { authToken });
        await set(appConfig, updatedInstallationEntry);
        return authToken;
    }
    catch (e) {
        if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {
            // Server returned a "FID not found" or a "Invalid authentication" error.
            // Generate a new ID next time.
            await remove(appConfig);
        }
        else {
            const updatedInstallationEntry = Object.assign({}, installationEntry, { authToken: { requestStatus: 0 /* NOT_STARTED */ } });
            await set(appConfig, updatedInstallationEntry);
        }
        throw e;
    }
}
function isEntryRegistered(installationEntry) {
    return (installationEntry !== undefined &&
        installationEntry.registrationStatus === 2 /* COMPLETED */);
}
function isAuthTokenValid(authToken) {
    return (authToken.requestStatus === 2 /* COMPLETED */ &&
        !isAuthTokenExpired(authToken));
}
function isAuthTokenExpired(authToken) {
    const now = Date.now();
    return (now < authToken.creationTime ||
        authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER);
}
/** Returns an updated InstallationEntry with an InProgressAuthToken. */
function makeAuthTokenRequestInProgressEntry(oldEntry) {
    const inProgressAuthToken = {
        requestStatus: 1 /* IN_PROGRESS */,
        requestTime: Date.now()
    };
    return Object.assign({}, oldEntry, { authToken: inProgressAuthToken });
}
function hasAuthTokenRequestTimedOut(authToken) {
    return (authToken.requestStatus === 1 /* IN_PROGRESS */ &&
        authToken.requestTime + PENDING_TIMEOUT_MS < Date.now());
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
async function getId(app) {
    const appConfig = extractAppConfig(app);
    const { installationEntry, registrationPromise } = await getInstallationEntry(appConfig);
    if (registrationPromise) {
        // Suppress registration errors as they are not a problem for getId.
        registrationPromise.catch(() => { });
    }
    if (installationEntry.registrationStatus === 2 /* COMPLETED */) {
        // If the installation is already registered, update the authentication
        // token if needed. Suppress errors as they are not relevant to getId.
        refreshAuthToken(appConfig).catch(() => { });
    }
    return installationEntry.fid;
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
async function getToken(app) {
    const appConfig = extractAppConfig(app);
    await completeInstallationRegistration(appConfig);
    // At this point we either have a Registered Installation in the DB, or we've
    // already thrown an error.
    return refreshAuthToken(appConfig);
}
async function completeInstallationRegistration(appConfig) {
    const { installationEntry, registrationPromise } = await getInstallationEntry(appConfig);
    if (registrationPromise) {
        // A createInstallation request is in progress. Wait until it finishes.
        await registrationPromise;
    }
    else if (installationEntry.registrationStatus !== 2 /* COMPLETED */) {
        // Installation ID can't be registered.
        throw ERROR_FACTORY.create("create-installation-failed" /* CREATE_INSTALLATION_FAILED */);
    }
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
async function deleteInstallation(appConfig, installationEntry) {
    const endpoint = getDeleteEndpoint(appConfig, installationEntry);
    const headers = getHeadersWithAuth(appConfig, installationEntry);
    const request = {
        method: 'DELETE',
        headers
    };
    const response = await retryIfServerError(() => fetch(endpoint, request));
    if (!response.ok) {
        throw await getErrorFromResponse('Delete Installation', response);
    }
}
function getDeleteEndpoint(appConfig, { fid }) {
    return `${getInstallationsEndpoint(appConfig)}/${fid}`;
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
async function deleteInstallation$1(app) {
    const appConfig = extractAppConfig(app);
    const entry = await update(appConfig, (oldEntry) => {
        if (oldEntry && oldEntry.registrationStatus === 0 /* NOT_STARTED */) {
            // Delete the unregistered entry without sending a deleteInstallation request.
            return undefined;
        }
        return oldEntry;
    });
    if (entry) {
        if (entry.registrationStatus === 1 /* IN_PROGRESS */) {
            // Can't delete while trying to register.
            throw ERROR_FACTORY.create("delete-pending-registration" /* DELETE_PENDING_REGISTRATION */);
        }
        else if (entry.registrationStatus === 2 /* COMPLETED */) {
            if (!navigator.onLine) {
                throw ERROR_FACTORY.create("app-offline" /* APP_OFFLINE */);
            }
            else {
                await deleteInstallation(appConfig, entry);
                await remove(appConfig);
            }
        }
    }
}

/**
 * @license
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function registerInstallations(instance) {
    const installationsName = 'installations';
    const factoryMethod = app => {
        // Throws if app isn't configured properly.
        extractAppConfig(app);
        return {
            app,
            getId: () => getId(app),
            getToken: () => getToken(app),
            delete: () => deleteInstallation$1(app)
        };
    };
    instance.INTERNAL.registerService(installationsName, factoryMethod);
}
registerInstallations(firebase);

export { registerInstallations };
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