import React from 'react';
import v4 from 'uuid/v4';
import _ from 'lodash';
import faker from 'faker/locale/en_US';

import {
    Container,
    FloatGrid as Grid,
    Button,
    Card,
    CardHeader,
    CardBody,
    UncontrolledDropdown,
    DropdownMenu,
    DropdownToggle,
    DropdownItem
} from './../../../components';
import { applyColumn } from './../../../components/FloatGrid';
import {
    HeaderMain
} from './../../components/HeaderMain';

export class DragAndDropLayout extends React.Component {
    constructor(props) {
        super(props);

        this._lastLayout = this._generateLayout();

        this.state = {
            layouts: this._lastLayout,
            compactType: 'vertical',
            fluid: false,
            texts: this._generateTexts(this._lastLayout)
        }

        this.generateLayoutHandler = this.generateLayoutHandler.bind(this);
        this.resetLayoutHandler = this.resetLayoutHandler.bind(this);
    }

    generateLayoutHandler() {
        this._lastLayout = this._generateLayout();

        this.setState({
            layouts: this._lastLayout,
            texts: this._generateTexts(this._lastLayout)
        });
    }

    resetLayoutHandler() {
        this.setState({
            layouts: this._lastLayout
        });
    }

    selectCompactType(compactType) {
        this.setState({ compactType });
    }

    selectFluid(fluid) {
        this.setState({ fluid });
    }

    render() {
        const { compactType, fluid, texts } = this.state;

        return (
            <React.Fragment>
                <Container fluid={ fluid }>
                    <HeaderMain title="Drag &amp; Drop Layout" className="mb-5 mt-4" />
                    <p>
                        <strong>React-Grid Layout</strong> is a grid layout system much like Packery or Gridster for React. Unlike those systems, it is responsive and supports breakpoints. These breakpoints can be provided in the same way as in Reactstrap&apos;s Grid system.
                    </p>
                    <div className="d-flex align-items-center pb-4">
                        <Button color="primary" onClick={ this.generateLayoutHandler }>
                            Generate New Layout
                        </Button>

                        <UncontrolledDropdown className="ml-2">
                            <DropdownToggle outline>
                                Change Compaction Type:&nbsp;
                                <strong>
                                    { !compactType && "No Compactions" }
                                    { compactType === "vertical" && "Vertical" }
                                    { compactType === "horizontal" && "Horizontal" }
                                </strong>
                                <i className="fa fa-angle-down ml-2" />
                            </DropdownToggle>
                            <DropdownMenu right>
                                <DropdownItem
                                    active={!compactType}
                                    onClick={() => this.selectCompactType(null)}
                                >
                                    No Compactions
                                </DropdownItem>
                                <DropdownItem
                                    active={compactType === "vertical"}
                                    onClick={() => this.selectCompactType("vertical")}
                                >
                                    Vertical
                                </DropdownItem>
                                <DropdownItem
                                    active={compactType === "horizontal"}
                                    onClick={() => this.selectCompactType("horizontal")}
                                >
                                    Horizontal
                                </DropdownItem>
                            </DropdownMenu>
                        </UncontrolledDropdown>

                        <UncontrolledDropdown className="ml-2">
                            <DropdownToggle outline>
                                Layout:&nbsp;
                                <strong>
                                    { !fluid && "Container" }
                                    { fluid && "Fluid" }
                                </strong>
                                <i className="fa fa-angle-down ml-2" />
                            </DropdownToggle>
                            <DropdownMenu right >
                                <DropdownItem
                                    active={!fluid} 
                                    onClick={() => this.selectFluid(false)}
                                >
                                    Container
                                </DropdownItem>
                                <DropdownItem
                                    active={fluid}
                                    onClick={() => this.selectFluid(true)}
                                >
                                    Fluid
                                </DropdownItem>
                            </DropdownMenu>
                        </UncontrolledDropdown>

                        <Button color="link" className="ml-2" onClick={ this.resetLayoutHandler }>
                            <i className="fa fa-times-circle text-danger fa-fw mr-1" />Reset
                        </Button>
                    </div>
                </Container>
                <Grid
                    className="mt-4"
                    fluid={ this.state.fluid }
                    compactType={ compactType }
                >
                    <Grid.Row
                        onLayoutChange={ layouts => this.setState({ layouts }) }
                        columnSizes={ this.state.layouts }
                        rowHeight={ 55 }
                    >
                        {
                            _.chain(this.state.layouts)
                                .keys()
                                .map((layoutKey) => (
                                    <Grid.Col {...applyColumn(layoutKey, this.state.layouts)} key={ layoutKey }>
                                        <Card>
                                            <CardHeader className="bb-0 pt-3 pb-0 bg-none" tag="h6">
                                                <i className="fa fa-ellipsis-v mr-2"></i> { texts[layoutKey].title }
                                            </CardHeader>
                                            <CardBody style={{ overflow: "hidden" }} className="pt-3">
                                                { texts[layoutKey].desc }
                                            </CardBody>
                                        </Card>
                                    </Grid.Col>
                                ))
                                .value()
                        }
                    </Grid.Row>
                </Grid>
            </React.Fragment>
        );
    }

    _generateLayout = (rowsCount = 3) => {
        const TOTAL_ROWS = 12;
        const HEIGHT = 5;
        let output = {};

        for (let i = 0; i < rowsCount; i++) {
            let availableRow = TOTAL_ROWS;
            while (availableRow > 0) {
                const newCol = availableRow < TOTAL_ROWS ? availableRow : 
                    _.random(3, 9);

                availableRow -= newCol;
                output = {
                    ...output,
                    [v4()]: { md: newCol, h: HEIGHT }
                }
            }
        }

        return output;
    }

    _generateTexts = (layouts) =>
        _.mapValues(layouts, () => ({
            title: faker.commerce.productName(),
            desc: faker.lorem.paragraph()
        }))
}