/*
Copyright 2016 OpenMarket Ltd
Copyright 2017 Vector Creations Ltd
Copyright 2020 The Matrix.org Foundation C.I.C.

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.
*/

import React from "react";
import { MatrixClient, UIAResponse } from "matrix-js-sdk/src/matrix";
import { AuthType } from "matrix-js-sdk/src/interactive-auth";

import { _t } from "../../../languageHandler";
import AccessibleButton from "../elements/AccessibleButton";
import InteractiveAuth, {
    ERROR_USER_CANCELLED,
    InteractiveAuthCallback,
    InteractiveAuthProps,
} from "../../structures/InteractiveAuth";
import { ContinueKind, SSOAuthEntry } from "../auth/InteractiveAuthEntryComponents";
import BaseDialog from "./BaseDialog";

type DialogAesthetics = Partial<{
    [x in AuthType]: {
        [x: number]: {
            title: string;
            body: string;
            continueText: string;
            continueKind: ContinueKind;
        };
    };
}>;

export interface InteractiveAuthDialogProps<T = unknown>
    extends Pick<InteractiveAuthProps<T>, "makeRequest" | "authData"> {
    // matrix client to use for UI auth requests
    matrixClient: MatrixClient;

    // Optional title and body to show when not showing a particular stage
    title?: string;
    body?: string;

    // Optional title and body pairs for particular stages and phases within
    // those stages. Object structure/example is:
    // {
    //     "org.example.stage_type": {
    //         1: {
    //             "body": "This is a body for phase 1" of org.example.stage_type,
    //             "title": "Title for phase 1 of org.example.stage_type"
    //         },
    //         2: {
    //             "body": "This is a body for phase 2 of org.example.stage_type",
    //             "title": "Title for phase 2 of org.example.stage_type"
    //             "continueText": "Confirm identity with Example Auth",
    //             "continueKind": "danger"
    //         }
    //     }
    // }
    //
    // Default is defined in _getDefaultDialogAesthetics()
    aestheticsForStagePhases?: DialogAesthetics;

    onFinished(success?: boolean, result?: UIAResponse<T> | Error | null): void;
}

interface IState {
    authError: Error | null;

    // See _onUpdateStagePhase()
    uiaStage: AuthType | null;
    uiaStagePhase: number | null;
}

export default class InteractiveAuthDialog<T> extends React.Component<InteractiveAuthDialogProps<T>, IState> {
    public constructor(props: InteractiveAuthDialogProps<T>) {
        super(props);

        this.state = {
            authError: null,

            // See _onUpdateStagePhase()
            uiaStage: null,
            uiaStagePhase: null,
        };
    }

    private getDefaultDialogAesthetics(): DialogAesthetics {
        const ssoAesthetics = {
            [SSOAuthEntry.PHASE_PREAUTH]: {
                title: _t("auth|uia|sso_title"),
                body: _t("auth|uia|sso_preauth_body"),
                continueText: _t("auth|sso"),
                continueKind: "primary",
            },
            [SSOAuthEntry.PHASE_POSTAUTH]: {
                title: _t("auth|uia|sso_postauth_title"),
                body: _t("auth|uia|sso_postauth_body"),
                continueText: _t("action|confirm"),
                continueKind: "primary",
            },
        };

        return {
            [SSOAuthEntry.LOGIN_TYPE]: ssoAesthetics,
            [SSOAuthEntry.UNSTABLE_LOGIN_TYPE]: ssoAesthetics,
        };
    }

    private onAuthFinished: InteractiveAuthCallback<T> = async (success, result): Promise<void> => {
        if (success) {
            this.props.onFinished(true, result);
        } else {
            if (result === ERROR_USER_CANCELLED) {
                this.props.onFinished(false, null);
            } else {
                this.setState({
                    authError: result as Error,
                });
            }
        }
    };

    private onUpdateStagePhase = (newStage: AuthType, newPhase: number): void => {
        // We copy the stage and stage phase params into state for title selection in render()
        this.setState({ uiaStage: newStage, uiaStagePhase: newPhase });
    };

    private onDismissClick = (): void => {
        this.props.onFinished(false);
    };

    public render(): React.ReactNode {
        // Let's pick a title, body, and other params text that we'll show to the user. The order
        // is most specific first, so stagePhase > our props > defaults.

        let title = this.state.authError ? "Error" : this.props.title || _t("common|authentication");
        let body = this.state.authError ? null : this.props.body;
        let continueText: string | undefined;
        let continueKind: ContinueKind | undefined;
        const dialogAesthetics = this.props.aestheticsForStagePhases || this.getDefaultDialogAesthetics();
        if (!this.state.authError && dialogAesthetics) {
            if (
                this.state.uiaStage !== null &&
                this.state.uiaStagePhase !== null &&
                dialogAesthetics[this.state.uiaStage]
            ) {
                const aesthetics = dialogAesthetics[this.state.uiaStage]![this.state.uiaStagePhase];
                if (aesthetics) {
                    if (aesthetics.title) title = aesthetics.title;
                    if (aesthetics.body) body = aesthetics.body;
                    if (aesthetics.continueText) continueText = aesthetics.continueText;
                    if (aesthetics.continueKind) continueKind = aesthetics.continueKind;
                }
            }
        }

        let content: JSX.Element;
        if (this.state.authError) {
            content = (
                <div id="mx_Dialog_content">
                    <div role="alert">{this.state.authError.message || this.state.authError.toString()}</div>
                    <br />
                    <AccessibleButton onClick={this.onDismissClick} className="mx_GeneralButton" autoFocus={true}>
                        {_t("action|dismiss")}
                    </AccessibleButton>
                </div>
            );
        } else {
            content = (
                <div id="mx_Dialog_content">
                    {body}
                    <InteractiveAuth
                        matrixClient={this.props.matrixClient}
                        authData={this.props.authData}
                        makeRequest={this.props.makeRequest}
                        onAuthFinished={this.onAuthFinished}
                        onStagePhaseChange={this.onUpdateStagePhase}
                        continueText={continueText}
                        continueKind={continueKind}
                    />
                </div>
            );
        }

        return (
            <BaseDialog
                className="mx_InteractiveAuthDialog"
                onFinished={this.props.onFinished}
                title={title}
                contentId="mx_Dialog_content"
            >
                {content}
            </BaseDialog>
        );
    }
}