/*
Copyright 2019 New Vector Ltd
Copyright 2019 - 2021 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, { ChangeEvent, ReactNode } from "react";

import { _t } from "../../../../../languageHandler";
import SdkConfig from "../../../../../SdkConfig";
import SettingsStore from "../../../../../settings/SettingsStore";
import SettingsFlag from "../../../elements/SettingsFlag";
import Field from "../../../elements/Field";
import AccessibleButton from "../../../elements/AccessibleButton";
import { SettingLevel } from "../../../../../settings/SettingLevel";
import { UIFeature } from "../../../../../settings/UIFeature";
import { Layout } from "../../../../../settings/enums/Layout";
import LayoutSwitcher from "../../LayoutSwitcher";
import FontScalingPanel from "../../FontScalingPanel";
import ThemeChoicePanel from "../../ThemeChoicePanel";
import ImageSizePanel from "../../ImageSizePanel";
import SettingsTab from "../SettingsTab";
import { SettingsSection } from "../../shared/SettingsSection";
import SettingsSubsection, { SettingsSubsectionText } from "../../shared/SettingsSubsection";
import MatrixClientContext from "../../../../../contexts/MatrixClientContext";

interface IProps {}

interface IState {
    useSystemFont: boolean;
    systemFont: string;
    showAdvanced: boolean;
    layout: Layout;
    // User profile data for the message preview
    userId?: string;
    displayName?: string;
    avatarUrl?: string;
}

export default class AppearanceUserSettingsTab extends React.Component<IProps, IState> {
    public static contextType = MatrixClientContext;
    public context!: React.ContextType<typeof MatrixClientContext>;

    private readonly MESSAGE_PREVIEW_TEXT = _t("Hey you. You're the best!");

    private unmounted = false;

    public constructor(props: IProps) {
        super(props);

        this.state = {
            useSystemFont: SettingsStore.getValue("useSystemFont"),
            systemFont: SettingsStore.getValue("systemFont"),
            showAdvanced: false,
            layout: SettingsStore.getValue("layout"),
        };
    }

    public async componentDidMount(): Promise<void> {
        // Fetch the current user profile for the message preview
        const client = this.context;
        const userId = client.getUserId()!;
        const profileInfo = await client.getProfileInfo(userId);
        if (this.unmounted) return;

        this.setState({
            userId,
            displayName: profileInfo.displayname,
            avatarUrl: profileInfo.avatar_url,
        });
    }

    public componentWillUnmount(): void {
        this.unmounted = true;
    }

    private onLayoutChanged = (layout: Layout): void => {
        this.setState({ layout: layout });
    };

    private renderAdvancedSection(): ReactNode {
        if (!SettingsStore.getValue(UIFeature.AdvancedSettings)) return null;

        const brand = SdkConfig.get().brand;
        const toggle = (
            <AccessibleButton
                kind="link"
                onClick={() => this.setState({ showAdvanced: !this.state.showAdvanced })}
                aria-expanded={this.state.showAdvanced}
            >
                {this.state.showAdvanced ? _t("Hide advanced") : _t("Show advanced")}
            </AccessibleButton>
        );

        let advanced: React.ReactNode;

        if (this.state.showAdvanced) {
            const tooltipContent = _t("settings|appearance|custom_font_description", { brand });
            advanced = (
                <>
                    <SettingsFlag name="useCompactLayout" level={SettingLevel.DEVICE} useCheckbox={true} />

                    <SettingsFlag
                        name="useSystemFont"
                        level={SettingLevel.DEVICE}
                        useCheckbox={true}
                        onChange={(checked) => this.setState({ useSystemFont: checked })}
                    />
                    <Field
                        className="mx_AppearanceUserSettingsTab_checkboxControlledField"
                        label={SettingsStore.getDisplayName("systemFont")!}
                        onChange={(value: ChangeEvent<HTMLInputElement>) => {
                            this.setState({
                                systemFont: value.target.value,
                            });

                            SettingsStore.setValue("systemFont", null, SettingLevel.DEVICE, value.target.value);
                        }}
                        tooltipContent={tooltipContent}
                        forceTooltipVisible={true}
                        disabled={!this.state.useSystemFont}
                        value={this.state.systemFont}
                    />
                </>
            );
        }
        return (
            <SettingsSubsection>
                {toggle}
                {advanced}
            </SettingsSubsection>
        );
    }

    public render(): React.ReactNode {
        const brand = SdkConfig.get().brand;

        return (
            <SettingsTab data-testid="mx_AppearanceUserSettingsTab">
                <SettingsSection heading={_t("settings|appearance|heading")}>
                    <SettingsSubsectionText>{_t("settings|appearance|subheading", { brand })}</SettingsSubsectionText>
                    <ThemeChoicePanel />
                    <LayoutSwitcher
                        userId={this.state.userId}
                        displayName={this.state.displayName}
                        avatarUrl={this.state.avatarUrl}
                        messagePreviewText={this.MESSAGE_PREVIEW_TEXT}
                        onLayoutChanged={this.onLayoutChanged}
                    />
                    <FontScalingPanel />
                    {this.renderAdvancedSection()}
                    <ImageSizePanel />
                </SettingsSection>
            </SettingsTab>
        );
    }
}