// Flags: --expose-internals
'use strict';

const common = require('../common');
if (!common.hasCrypto)
  common.skip('missing crypto');
const assert = require('assert');
const { internalBinding } = require('internal/test/binding');

const binding = internalBinding('http2');
const http2 = require('http2');

assert(binding.Http2Session);
assert.strictEqual(typeof binding.Http2Session, 'function');

const settings = http2.getDefaultSettings();
assert.strictEqual(settings.headerTableSize, 4096);
assert.strictEqual(settings.enablePush, true);
assert.strictEqual(settings.initialWindowSize, 65535);
assert.strictEqual(settings.maxFrameSize, 16384);

assert.strictEqual(binding.nghttp2ErrorString(-517),
                   'GOAWAY has already been sent');

// assert constants are present
assert(binding.constants);
assert.strictEqual(typeof binding.constants, 'object');
const constants = binding.constants;

const expectedStatusCodes = {
  HTTP_STATUS_CONTINUE: 100,
  HTTP_STATUS_SWITCHING_PROTOCOLS: 101,
  HTTP_STATUS_PROCESSING: 102,
  HTTP_STATUS_EARLY_HINTS: 103,
  HTTP_STATUS_OK: 200,
  HTTP_STATUS_CREATED: 201,
  HTTP_STATUS_ACCEPTED: 202,
  HTTP_STATUS_NON_AUTHORITATIVE_INFORMATION: 203,
  HTTP_STATUS_NO_CONTENT: 204,
  HTTP_STATUS_RESET_CONTENT: 205,
  HTTP_STATUS_PARTIAL_CONTENT: 206,
  HTTP_STATUS_MULTI_STATUS: 207,
  HTTP_STATUS_ALREADY_REPORTED: 208,
  HTTP_STATUS_IM_USED: 226,
  HTTP_STATUS_MULTIPLE_CHOICES: 300,
  HTTP_STATUS_MOVED_PERMANENTLY: 301,
  HTTP_STATUS_FOUND: 302,
  HTTP_STATUS_SEE_OTHER: 303,
  HTTP_STATUS_NOT_MODIFIED: 304,
  HTTP_STATUS_USE_PROXY: 305,
  HTTP_STATUS_TEMPORARY_REDIRECT: 307,
  HTTP_STATUS_PERMANENT_REDIRECT: 308,
  HTTP_STATUS_BAD_REQUEST: 400,
  HTTP_STATUS_UNAUTHORIZED: 401,
  HTTP_STATUS_PAYMENT_REQUIRED: 402,
  HTTP_STATUS_FORBIDDEN: 403,
  HTTP_STATUS_NOT_FOUND: 404,
  HTTP_STATUS_METHOD_NOT_ALLOWED: 405,
  HTTP_STATUS_NOT_ACCEPTABLE: 406,
  HTTP_STATUS_PROXY_AUTHENTICATION_REQUIRED: 407,
  HTTP_STATUS_REQUEST_TIMEOUT: 408,
  HTTP_STATUS_CONFLICT: 409,
  HTTP_STATUS_GONE: 410,
  HTTP_STATUS_LENGTH_REQUIRED: 411,
  HTTP_STATUS_PRECONDITION_FAILED: 412,
  HTTP_STATUS_PAYLOAD_TOO_LARGE: 413,
  HTTP_STATUS_URI_TOO_LONG: 414,
  HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE: 415,
  HTTP_STATUS_RANGE_NOT_SATISFIABLE: 416,
  HTTP_STATUS_EXPECTATION_FAILED: 417,
  HTTP_STATUS_TEAPOT: 418,
  HTTP_STATUS_MISDIRECTED_REQUEST: 421,
  HTTP_STATUS_UNPROCESSABLE_ENTITY: 422,
  HTTP_STATUS_LOCKED: 423,
  HTTP_STATUS_FAILED_DEPENDENCY: 424,
  HTTP_STATUS_UNORDERED_COLLECTION: 425,
  HTTP_STATUS_UPGRADE_REQUIRED: 426,
  HTTP_STATUS_PRECONDITION_REQUIRED: 428,
  HTTP_STATUS_TOO_MANY_REQUESTS: 429,
  HTTP_STATUS_REQUEST_HEADER_FIELDS_TOO_LARGE: 431,
  HTTP_STATUS_UNAVAILABLE_FOR_LEGAL_REASONS: 451,
  HTTP_STATUS_INTERNAL_SERVER_ERROR: 500,
  HTTP_STATUS_NOT_IMPLEMENTED: 501,
  HTTP_STATUS_BAD_GATEWAY: 502,
  HTTP_STATUS_SERVICE_UNAVAILABLE: 503,
  HTTP_STATUS_GATEWAY_TIMEOUT: 504,
  HTTP_STATUS_HTTP_VERSION_NOT_SUPPORTED: 505,
  HTTP_STATUS_VARIANT_ALSO_NEGOTIATES: 506,
  HTTP_STATUS_INSUFFICIENT_STORAGE: 507,
  HTTP_STATUS_LOOP_DETECTED: 508,
  HTTP_STATUS_BANDWIDTH_LIMIT_EXCEEDED: 509,
  HTTP_STATUS_NOT_EXTENDED: 510,
  HTTP_STATUS_NETWORK_AUTHENTICATION_REQUIRED: 511
};

const expectedHeaderNames = {
  HTTP2_HEADER_STATUS: ':status',
  HTTP2_HEADER_METHOD: ':method',
  HTTP2_HEADER_AUTHORITY: ':authority',
  HTTP2_HEADER_SCHEME: ':scheme',
  HTTP2_HEADER_PATH: ':path',
  HTTP2_HEADER_PROTOCOL: ':protocol',
  HTTP2_HEADER_DATE: 'date',
  HTTP2_HEADER_ACCEPT_CHARSET: 'accept-charset',
  HTTP2_HEADER_ACCEPT_ENCODING: 'accept-encoding',
  HTTP2_HEADER_ACCEPT_LANGUAGE: 'accept-language',
  HTTP2_HEADER_ACCEPT_RANGES: 'accept-ranges',
  HTTP2_HEADER_ACCEPT: 'accept',
  HTTP2_HEADER_ACCESS_CONTROL_ALLOW_CREDENTIALS: 'access-control-allow-credentials', // eslint-disable-line max-len
  HTTP2_HEADER_ACCESS_CONTROL_ALLOW_HEADERS: 'access-control-allow-headers',
  HTTP2_HEADER_ACCESS_CONTROL_ALLOW_METHODS: 'access-control-allow-methods',
  HTTP2_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN: 'access-control-allow-origin',
  HTTP2_HEADER_ACCESS_CONTROL_EXPOSE_HEADERS: 'access-control-expose-headers',
  HTTP2_HEADER_ACCESS_CONTROL_MAX_AGE: 'access-control-max-age',
  HTTP2_HEADER_ACCESS_CONTROL_REQUEST_HEADERS: 'access-control-request-headers',
  HTTP2_HEADER_ACCESS_CONTROL_REQUEST_METHOD: 'access-control-request-method',
  HTTP2_HEADER_AGE: 'age',
  HTTP2_HEADER_ALLOW: 'allow',
  HTTP2_HEADER_AUTHORIZATION: 'authorization',
  HTTP2_HEADER_CACHE_CONTROL: 'cache-control',
  HTTP2_HEADER_CONTENT_DISPOSITION: 'content-disposition',
  HTTP2_HEADER_CONTENT_ENCODING: 'content-encoding',
  HTTP2_HEADER_CONTENT_LANGUAGE: 'content-language',
  HTTP2_HEADER_CONTENT_LENGTH: 'content-length',
  HTTP2_HEADER_CONTENT_LOCATION: 'content-location',
  HTTP2_HEADER_CONTENT_RANGE: 'content-range',
  HTTP2_HEADER_CONTENT_TYPE: 'content-type',
  HTTP2_HEADER_COOKIE: 'cookie',
  HTTP2_HEADER_CONNECTION: 'connection',
  HTTP2_HEADER_DNT: 'dnt',
  HTTP2_HEADER_ETAG: 'etag',
  HTTP2_HEADER_EXPECT: 'expect',
  HTTP2_HEADER_EXPIRES: 'expires',
  HTTP2_HEADER_FORWARDED: 'forwarded',
  HTTP2_HEADER_FROM: 'from',
  HTTP2_HEADER_HOST: 'host',
  HTTP2_HEADER_IF_MATCH: 'if-match',
  HTTP2_HEADER_IF_MODIFIED_SINCE: 'if-modified-since',
  HTTP2_HEADER_IF_NONE_MATCH: 'if-none-match',
  HTTP2_HEADER_IF_RANGE: 'if-range',
  HTTP2_HEADER_IF_UNMODIFIED_SINCE: 'if-unmodified-since',
  HTTP2_HEADER_LAST_MODIFIED: 'last-modified',
  HTTP2_HEADER_LINK: 'link',
  HTTP2_HEADER_LOCATION: 'location',
  HTTP2_HEADER_MAX_FORWARDS: 'max-forwards',
  HTTP2_HEADER_PREFER: 'prefer',
  HTTP2_HEADER_PROXY_AUTHENTICATE: 'proxy-authenticate',
  HTTP2_HEADER_PROXY_AUTHORIZATION: 'proxy-authorization',
  HTTP2_HEADER_PROXY_CONNECTION: 'proxy-connection',
  HTTP2_HEADER_RANGE: 'range',
  HTTP2_HEADER_REFERER: 'referer',
  HTTP2_HEADER_REFRESH: 'refresh',
  HTTP2_HEADER_RETRY_AFTER: 'retry-after',
  HTTP2_HEADER_SERVER: 'server',
  HTTP2_HEADER_SET_COOKIE: 'set-cookie',
  HTTP2_HEADER_STRICT_TRANSPORT_SECURITY: 'strict-transport-security',
  HTTP2_HEADER_TRAILER: 'trailer',
  HTTP2_HEADER_TRANSFER_ENCODING: 'transfer-encoding',
  HTTP2_HEADER_TK: 'tk',
  HTTP2_HEADER_UPGRADE_INSECURE_REQUESTS: 'upgrade-insecure-requests',
  HTTP2_HEADER_USER_AGENT: 'user-agent',
  HTTP2_HEADER_VARY: 'vary',
  HTTP2_HEADER_VIA: 'via',
  HTTP2_HEADER_WARNING: 'warning',
  HTTP2_HEADER_WWW_AUTHENTICATE: 'www-authenticate',
  HTTP2_HEADER_X_CONTENT_TYPE_OPTIONS: 'x-content-type-options',
  HTTP2_HEADER_X_FRAME_OPTIONS: 'x-frame-options',
  HTTP2_HEADER_KEEP_ALIVE: 'keep-alive',
  HTTP2_HEADER_CONTENT_MD5: 'content-md5',
  HTTP2_HEADER_TE: 'te',
  HTTP2_HEADER_UPGRADE: 'upgrade',
  HTTP2_HEADER_HTTP2_SETTINGS: 'http2-settings'
};

const expectedNGConstants = {
  NGHTTP2_SESSION_SERVER: 0,
  NGHTTP2_SESSION_CLIENT: 1,
  NGHTTP2_STREAM_STATE_IDLE: 1,
  NGHTTP2_STREAM_STATE_OPEN: 2,
  NGHTTP2_STREAM_STATE_RESERVED_LOCAL: 3,
  NGHTTP2_STREAM_STATE_RESERVED_REMOTE: 4,
  NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL: 5,
  NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE: 6,
  NGHTTP2_STREAM_STATE_CLOSED: 7,
  NGHTTP2_HCAT_REQUEST: 0,
  NGHTTP2_HCAT_RESPONSE: 1,
  NGHTTP2_HCAT_PUSH_RESPONSE: 2,
  NGHTTP2_HCAT_HEADERS: 3,
  NGHTTP2_NO_ERROR: 0,
  NGHTTP2_PROTOCOL_ERROR: 1,
  NGHTTP2_INTERNAL_ERROR: 2,
  NGHTTP2_FLOW_CONTROL_ERROR: 3,
  NGHTTP2_SETTINGS_TIMEOUT: 4,
  NGHTTP2_STREAM_CLOSED: 5,
  NGHTTP2_FRAME_SIZE_ERROR: 6,
  NGHTTP2_REFUSED_STREAM: 7,
  NGHTTP2_CANCEL: 8,
  NGHTTP2_COMPRESSION_ERROR: 9,
  NGHTTP2_CONNECT_ERROR: 10,
  NGHTTP2_ENHANCE_YOUR_CALM: 11,
  NGHTTP2_INADEQUATE_SECURITY: 12,
  NGHTTP2_HTTP_1_1_REQUIRED: 13,
  NGHTTP2_NV_FLAG_NONE: 0,
  NGHTTP2_NV_FLAG_NO_INDEX: 1,
  NGHTTP2_ERR_DEFERRED: -508,
  NGHTTP2_ERR_NOMEM: -901,
  NGHTTP2_ERR_STREAM_ID_NOT_AVAILABLE: -509,
  NGHTTP2_ERR_INVALID_ARGUMENT: -501,
  NGHTTP2_ERR_STREAM_CLOSED: -510,
  NGHTTP2_ERR_FRAME_SIZE_ERROR: -522,
  NGHTTP2_FLAG_NONE: 0,
  NGHTTP2_FLAG_END_STREAM: 1,
  NGHTTP2_FLAG_END_HEADERS: 4,
  NGHTTP2_FLAG_ACK: 1,
  NGHTTP2_FLAG_PADDED: 8,
  NGHTTP2_FLAG_PRIORITY: 32,
  NGHTTP2_DEFAULT_WEIGHT: 16,
  NGHTTP2_SETTINGS_HEADER_TABLE_SIZE: 1,
  NGHTTP2_SETTINGS_ENABLE_PUSH: 2,
  NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS: 3,
  NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE: 4,
  NGHTTP2_SETTINGS_MAX_FRAME_SIZE: 5,
  NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE: 6,
  NGHTTP2_SETTINGS_ENABLE_CONNECT_PROTOCOL: 8
};

const defaultSettings = {
  DEFAULT_SETTINGS_HEADER_TABLE_SIZE: 4096,
  DEFAULT_SETTINGS_ENABLE_PUSH: 1,
  DEFAULT_SETTINGS_INITIAL_WINDOW_SIZE: 65535,
  DEFAULT_SETTINGS_MAX_FRAME_SIZE: 16384
};

for (const name of Object.keys(constants)) {
  if (name.startsWith('HTTP_STATUS_')) {
    assert.strictEqual(constants[name], expectedStatusCodes[name],
                       `Expected status code match for ${name}`);
  } else if (name.startsWith('HTTP2_HEADER_')) {
    assert.strictEqual(constants[name], expectedHeaderNames[name],
                       `Expected header name match for ${name}`);
  } else if (name.startsWith('NGHTTP2_')) {
    assert.strictEqual(constants[name], expectedNGConstants[name],
                       `Expected ng constant match for ${name}`);
  } else if (name.startsWith('DEFAULT_SETTINGS_')) {
    assert.strictEqual(constants[name], defaultSettings[name],
                       `Expected default setting match for ${name}`);
  }
}