// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.

import Log from './Log';
import WebStorageStateStore from './WebStorageStateStore';
import ResponseValidator from './ResponseValidator';
import MetadataService from './MetadataService';

const OidcMetadataUrlPath = '.well-known/openid-configuration';

const DefaultResponseType = "id_token";
const DefaultScope = "openid";
const DefaultStaleStateAge = 60; // seconds
const DefaultClockSkewInSeconds = 60 * 5;

export default class OidcClientSettings {
    constructor({
        // metadata related
        authority, metadataUrl, metadata, signingKeys,
        // client related
        client_id, client_secret, response_type = DefaultResponseType, scope = DefaultScope,
        redirect_uri, post_logout_redirect_uri,
        // optional protocol
        prompt, display, max_age, ui_locales, acr_values, resource,
        // behavior flags
        filterProtocolClaims = true, loadUserInfo = true,
        staleStateAge = DefaultStaleStateAge, clockSkew = DefaultClockSkewInSeconds,
        // other behavior
        stateStore = new WebStorageStateStore(),
        ResponseValidatorCtor = ResponseValidator,
        MetadataServiceCtor = MetadataService
    } = {}) {

        this._authority = authority;
        this._metadataUrl = metadataUrl;
        this._metadata = metadata;
        this._signingKeys = signingKeys;

        this._client_id = client_id;
        this._client_secret = client_secret;
        this._response_type = response_type;
        this._scope = scope;
        this._redirect_uri = redirect_uri;
        this._post_logout_redirect_uri = post_logout_redirect_uri;

        this._prompt = prompt;
        this._display = display;
        this._max_age = max_age;
        this._ui_locales = ui_locales;
        this._acr_values = acr_values;
        this._resource = resource;

        this._filterProtocolClaims = !!filterProtocolClaims;
        this._loadUserInfo = !!loadUserInfo;
        this._staleStateAge = staleStateAge;
        this._clockSkew = clockSkew;

        this._stateStore = stateStore;
        this._validator = new ResponseValidatorCtor(this);
        this._metadataService = new MetadataServiceCtor(this);
    }

    // client config
    get client_id() {
        return this._client_id;
    }
    set client_id(value) {
        if (!this._client_id) {
            // one-time set only
            this._client_id = value;
        }
        else {
            Log.error("client_id has already been assigned.")
            throw new Error("client_id has already been assigned.")
        }
    }
    get client_secret() {
        return this._client_secret;
    }
    get response_type() {
        return this._response_type;
    }
    get scope() {
        return this._scope;
    }
    get redirect_uri() {
        return this._redirect_uri;
    }
    get post_logout_redirect_uri() {
        return this._post_logout_redirect_uri;
    }


    // optional protocol params
    get prompt() {
        return this._prompt;
    }
    get display() {
        return this._display;
    }
    get max_age() {
        return this._max_age;
    }
    get ui_locales() {
        return this._ui_locales;
    }
    get acr_values() {
        return this._acr_values;
    }
    get resource() {
        return this._resource;
    }


    // metadata
    get authority() {
        return this._authority;
    }
    set authority(value) {
        if (!this._authority) {
            // one-time set only
            this._authority = value;
        }
        else {
            Log.error("authority has already been assigned.")
            throw new Error("authority has already been assigned.")
        }
    }
    get metadataUrl() {
        if (!this._metadataUrl) {
            this._metadataUrl = this.authority;

            if (this._metadataUrl && this._metadataUrl.indexOf(OidcMetadataUrlPath) < 0) {
                if (this._metadataUrl[this._metadataUrl.length - 1] !== '/') {
                    this._metadataUrl += '/';
                }
                this._metadataUrl += OidcMetadataUrlPath;
            }
        }

        return this._metadataUrl;
    }

    // settable/cachable metadata values
    get metadata() {
        return this._metadata;
    }
    set metadata(value) {
        this._metadata = value;
    }

    get signingKeys() {
        return this._signingKeys;
    }
    set signingKeys(value) {
        this._signingKeys = value;
    }

    // behavior flags
    get filterProtocolClaims() {
        return this._filterProtocolClaims;
    }
    get loadUserInfo() {
        return this._loadUserInfo;
    }
    get staleStateAge() {
        return this._staleStateAge;
    }
    get clockSkew() {
        return this._clockSkew;
    }

    get stateStore() {
        return this._stateStore;
    }
    get validator() {
        return this._validator;
    }
    get metadataService() {
        return this._metadataService;
    }
}
