import Constants from 'expo-constants';
import { EventEmitter } from 'fbemitter';
import invariant from 'invariant';
import { v4 as uuidv4 } from 'uuid';
import getInstallationIdAsync from '../environment/getInstallationIdAsync';
import LogSerialization from './LogSerialization';
const _sessionId = uuidv4();
const _logQueue = [];
const _transportEventEmitter = new EventEmitter();
let _logCounter = 0;
let _isSendingLogs = false;
let _completionPromise = null;
let _resolveCompletion = null;
async function enqueueRemoteLogAsync(level, additionalFields, data) {
    if (_isReactNativeWarning(data)) {
        // Remove the stack trace from the warning message since we'll capture our own
        if (data.length === 0) {
            throw new Error(`Warnings must include log arguments`);
        }
        const warning = data[0];
        if (typeof warning !== 'string') {
            throw new TypeError(`The log argument for a warning must be a string`);
        }
        const lines = warning.split('\n');
        if (lines.length > 1 && /^\s+in /.test(lines[1])) {
            data[0] = lines[0];
        }
    }
    const { body, includesStack } = await LogSerialization.serializeLogDataAsync(data, level);
    _logQueue.push({
        count: _logCounter++,
        level,
        body,
        includesStack,
        ...additionalFields,
    });
    // Send the logs asynchronously (system errors are emitted with transport error events) and throw an uncaught error
    _sendRemoteLogsAsync().catch(error => {
        setImmediate(() => {
            throw error;
        });
    });
}
async function _sendRemoteLogsAsync() {
    if (_isSendingLogs || !_logQueue.length) {
        return;
    }
    // Our current transport policy is to send all of the pending log messages in one batch. If we opt
    // for another policy (ex: throttling) this is where to to implement it.
    const batch = _logQueue.splice(0);
    const logUrl = Constants.manifest?.logUrl;
    if (typeof logUrl !== 'string') {
        throw new Error('The Expo project manifest must specify `logUrl`');
    }
    _isSendingLogs = true;
    try {
        await _sendNextLogBatchAsync(batch, logUrl);
    }
    finally {
        _isSendingLogs = false;
    }
    if (_logQueue.length) {
        return _sendRemoteLogsAsync();
    }
    else if (_resolveCompletion) {
        _resolveCompletion();
    }
}
async function _sendNextLogBatchAsync(batch, logUrl) {
    let response;
    const headers = {
        'Content-Type': 'application/json',
        Connection: 'keep-alive',
        'Proxy-Connection': 'keep-alive',
        Accept: 'application/json',
        'Device-Id': await getInstallationIdAsync(),
        'Session-Id': _sessionId,
    };
    if (Constants.deviceName) {
        headers['Device-Name'] = Constants.deviceName;
    }
    try {
        response = await fetch(logUrl, {
            method: 'POST',
            headers,
            body: JSON.stringify(batch),
        });
    }
    catch (error) {
        _transportEventEmitter.emit('error', { error });
        return;
    }
    const success = response.status >= 200 && response.status < 300;
    if (!success) {
        _transportEventEmitter.emit('error', {
            error: new Error(`An HTTP error occurred when sending remote logs`),
            response,
        });
    }
}
function addTransportErrorListener(listener) {
    return _transportEventEmitter.addListener('error', listener);
}
function _isReactNativeWarning(data) {
    // NOTE: RN does the same thing internally for YellowBox
    const message = data[0];
    return data.length === 1 && typeof message === 'string' && message.startsWith('Warning: ');
}
export default {
    enqueueRemoteLogAsync,
    addTransportErrorListener,
};
/**
 * Returns a promise that resolves when all entries in the log queue have been sent. This method is
 * intended for testing only.
 */
export function __waitForEmptyLogQueueAsync() {
    if (_completionPromise) {
        return _completionPromise;
    }
    if (!_isSendingLogs && !_logQueue.length) {
        return Promise.resolve();
    }
    _completionPromise = new Promise(resolve => {
        _resolveCompletion = () => {
            invariant(!_isSendingLogs, `Must not be sending logs at completion`);
            invariant(!_logQueue.length, `Log queue must be empty at completion`);
            _completionPromise = null;
            _resolveCompletion = null;
            resolve();
        };
    });
    return _completionPromise;
}
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