import React from 'react';

import {
    Tabs,
    Icon,
    Button,
    Tooltip,
    notification,
} from 'antd';

import Text from 'antd/lib/typography/Text';

import copy from 'copy-to-clipboard';

import RawViewer from './raw-viewer';
import ConstructorViewer from './constructor-viewer';
import ConstructorCreator from './constructor-creator';
import ConstructorUpdater from './constructor-updater';

import {
    idGenerator,
    Label,
    Attribute,
} from './common';

enum ConstructorMode {
    SHOW = 'SHOW',
    CREATE = 'CREATE',
    UPDATE = 'UPDATE',
}

interface LabelsEditortProps {
    labels: Label[];
    onSubmit: (labels: any[]) => void;
}

interface LabelsEditorState {
    constructorMode: ConstructorMode;
    savedLabels: Label[];
    unsavedLabels: Label[];
    labelForUpdate: Label | null;
}

export default class LabelsEditor
    extends React.PureComponent<LabelsEditortProps, LabelsEditorState> {
    public constructor(props: LabelsEditortProps) {
        super(props);

        this.state = {
            savedLabels: [],
            unsavedLabels: [],
            constructorMode: ConstructorMode.SHOW,
            labelForUpdate: null,
        };
    }

    public componentDidMount(): void {
        // just need performe the same code
        this.componentDidUpdate(null as any as LabelsEditortProps);
    }

    public componentDidUpdate(prevProps: LabelsEditortProps): void {
        function transformLabel(label: any): Label {
            return {
                name: label.name,
                id: label.id || idGenerator(),
                attributes: label.attributes.map((attr: any): Attribute => (
                    {
                        id: attr.id || idGenerator(),
                        name: attr.name,
                        type: attr.input_type,
                        mutable: attr.mutable,
                        values: [...attr.values],
                    }
                )),
            };
        }

        const { labels } = this.props;

        if (!prevProps || prevProps.labels !== labels) {
            const transformedLabels = labels.map(transformLabel);
            this.setState({
                savedLabels: transformedLabels
                    .filter((label: Label) => label.id >= 0),
                unsavedLabels: transformedLabels
                    .filter((label: Label) => label.id < 0),
            });
        }
    }

    private handleRawSubmit = (labels: Label[]): void => {
        const unsavedLabels = [];
        const savedLabels = [];

        for (const label of labels) {
            if (label.id >= 0) {
                savedLabels.push(label);
            } else {
                unsavedLabels.push(label);
            }
        }

        this.setState({
            unsavedLabels,
            savedLabels,
        });

        this.handleSubmit(savedLabels, unsavedLabels);
    };

    private handleCreate = (label: Label | null): void => {
        if (label === null) {
            this.setState({
                constructorMode: ConstructorMode.SHOW,
            });
        } else {
            const {
                unsavedLabels,
                savedLabels,
            } = this.state;
            const newUnsavedLabels = [
                ...unsavedLabels,
                {
                    ...label,
                    id: idGenerator(),
                },
            ];

            this.setState({
                unsavedLabels: newUnsavedLabels,
            });

            this.handleSubmit(savedLabels, newUnsavedLabels);
        }
    };

    private handleUpdate = (label: Label | null): void => {
        const {
            savedLabels,
            unsavedLabels,
        } = this.state;

        if (label) {
            const filteredSavedLabels = savedLabels
                .filter((_label: Label) => _label.id !== label.id);
            const filteredUnsavedLabels = unsavedLabels
                .filter((_label: Label) => _label.id !== label.id);
            if (label.id >= 0) {
                filteredSavedLabels.push(label);
                this.setState({
                    savedLabels: filteredSavedLabels,
                    constructorMode: ConstructorMode.SHOW,
                });
            } else {
                filteredUnsavedLabels.push(label);
                this.setState({
                    unsavedLabels: filteredUnsavedLabels,
                    constructorMode: ConstructorMode.SHOW,
                });
            }

            this.handleSubmit(filteredSavedLabels, filteredUnsavedLabels);
        } else {
            this.setState({
                constructorMode: ConstructorMode.SHOW,
            });
        }
    };

    private handleDelete = (label: Label): void => {
        // the label is saved on the server, cannot delete it
        if (typeof (label.id) !== 'undefined' && label.id >= 0) {
            notification.error({
                message: 'Could not delete the label',
                description: 'It has been already saved on the server',
            });
        }

        const {
            unsavedLabels,
            savedLabels,
        } = this.state;

        const filteredUnsavedLabels = unsavedLabels.filter(
            (_label: Label): boolean => _label.id !== label.id,
        );

        this.setState({
            unsavedLabels: filteredUnsavedLabels,
        });

        this.handleSubmit(savedLabels, filteredUnsavedLabels);
    };

    private handleSubmit(savedLabels: Label[], unsavedLabels: Label[]): void {
        function transformLabel(label: Label): any {
            return {
                name: label.name,
                id: label.id < 0 ? undefined : label.id,
                attributes: label.attributes.map((attr: Attribute): any => (
                    {
                        name: attr.name,
                        id: attr.id < 0 ? undefined : attr.id,
                        input_type: attr.type.toLowerCase(),
                        default_value: attr.values[0],
                        mutable: attr.mutable,
                        values: [...attr.values],
                    }
                )),
            };
        }

        const { onSubmit } = this.props;
        const output = [];
        for (const label of savedLabels.concat(unsavedLabels)) {
            output.push(transformLabel(label));
        }

        onSubmit(output);
    }

    public render(): JSX.Element {
        const {
            savedLabels,
            unsavedLabels,
            constructorMode,
            labelForUpdate,
        } = this.state;

        return (
            <Tabs
                defaultActiveKey='2'
                type='card'
                tabBarStyle={{ marginBottom: '0px' }}
                tabBarExtraContent={(
                    <>
                        <Tooltip overlay='Copied to clipboard!' trigger='click'>
                            <Button
                                type='link'
                                icon='copy'
                                onClick={(): void => {
                                    copy(JSON.stringify(
                                        savedLabels.concat(unsavedLabels).map((label): any => ({
                                            ...label,
                                            id: undefined,
                                            attributes: label.attributes.map((attribute): any => ({
                                                ...attribute,
                                                id: undefined,
                                            })),
                                        })), null, 4,
                                    ));
                                }}
                            >
                                Copy
                            </Button>
                        </Tooltip>
                    </>
                )}
            >
                <Tabs.TabPane
                    tab={
                        (
                            <span>
                                <Icon type='edit' />
                                <Text>Raw</Text>
                            </span>
                        )
                    }
                    key='1'
                >
                    <RawViewer
                        labels={[...savedLabels, ...unsavedLabels]}
                        onSubmit={this.handleRawSubmit}
                    />
                </Tabs.TabPane>

                <Tabs.TabPane
                    tab={
                        (
                            <span>
                                <Icon type='build' />
                                <Text>Constructor</Text>
                            </span>
                        )
                    }
                    key='2'
                >
                    {
                        constructorMode === ConstructorMode.SHOW
                            && (
                                <ConstructorViewer
                                    labels={[...savedLabels, ...unsavedLabels]}
                                    onUpdate={(label: Label): void => {
                                        this.setState({
                                            constructorMode: ConstructorMode.UPDATE,
                                            labelForUpdate: label,
                                        });
                                    }}
                                    onDelete={this.handleDelete}
                                    onCreate={(): void => {
                                        this.setState({
                                            constructorMode: ConstructorMode.CREATE,
                                        });
                                    }}
                                />
                            )
                    }
                    {
                        constructorMode === ConstructorMode.UPDATE
                            && labelForUpdate !== null && (
                            <ConstructorUpdater
                                label={labelForUpdate}
                                onUpdate={this.handleUpdate}
                            />
                        )
                    }
                    {
                        constructorMode === ConstructorMode.CREATE
                            && (
                                <ConstructorCreator
                                    onCreate={this.handleCreate}
                                />
                            )
                    }
                </Tabs.TabPane>
            </Tabs>
        );
    }
}