import React, { useEffect } from 'react';
import Widget from 'App/mstore/types/widget';
import Funnelbar from './FunnelBar';
import cn from 'classnames';
import stl from './FunnelWidget.module.css';
import { useObserver } from 'mobx-react-lite';
import { NoContent, Icon } from 'UI';
import { useModal } from 'App/components/Modal';

interface Props {
    metric: Widget;
    isWidget?: boolean;
    data: any;
}
function FunnelWidget(props: Props) {
    const { metric, isWidget = false, data } = props;
    const funnel = data.funnel || { stages: [] };
    const totalSteps = funnel.stages.length;
    const stages = isWidget ? [...funnel.stages.slice(0, 1), funnel.stages[funnel.stages.length - 1]] : funnel.stages;
    const hasMoreSteps = funnel.stages.length > 2;
    const lastStage = funnel.stages[funnel.stages.length - 1];
    const remainingSteps = totalSteps - 2;
    const { hideModal } = useModal();

    useEffect(() => {
        return () => {
            if (isWidget) return;
            hideModal();
        }
    }, []);

    return useObserver(() => (
        <NoContent show={!stages || stages.length === 0} title="No recordings found">
            <div className="w-full">
                { !isWidget && (
                    stages.map((filter: any, index: any) => (
                        <Stage key={index} index={index + 1} isWidget={isWidget} stage={filter} />
                    ))
                )}

                { isWidget && (
                    <>
                        <Stage index={1} isWidget={isWidget} stage={stages[0]} />

                        { hasMoreSteps && (
                            <>
                                <EmptyStage total={remainingSteps} />
                            </>
                        )}

                        {funnel.stages.length > 1 && (
                            <Stage index={totalSteps} isWidget={isWidget} stage={lastStage} />
                        )}
                    </>
                )}
            </div>
            <div className="flex items-center pb-4">
                <div className="flex items-center">
                    <span className="text-xl mr-2">Lost conversions</span>
                    <div className="rounded px-2 py-1 bg-red-lightest color-red">
                        <span className="text-xl mr-2 font-medium">{funnel.lostConversions}</span>
                        <span className="text-sm">({funnel.lostConversionsPercentage}%)</span>
                    </div>
                </div>
                <div className="mx-3" />
                <div className="flex items-center">
                    <span className="text-xl mr-2">Total conversions</span>
                    <div className="rounded px-2 py-1 bg-tealx-lightest color-tealx">
                        <span className="text-xl mr-2 font-medium">{funnel.totalConversions}</span>
                        <span className="text-sm">({funnel.totalConversionsPercentage}%)</span>
                    </div>
                </div>
            </div>
            {funnel.totalDropDueToIssues && <div>{funnel.totalDropDueToIssues} sessions dropped due to issues.</div>}
        </NoContent>
    ));
}

function EmptyStage({ total }: any) {
    return useObserver( () => (
        <div className={cn("flex items-center mb-4 pb-3", stl.step)}>
            <IndexNumber index={0} />
            <div className="w-fit px-2 border border-teal py-1 text-center justify-center bg-teal-lightest flex items-center rounded-full color-teal" style={{ width: '100px'}}>
                {`+${total} ${total > 1 ? 'steps' : 'step'}`}
            </div>
            <div className="border-b w-full border-dashed"></div>
        </div>
    ))
}

function Stage({ stage, index, isWidget }: any) {
    return useObserver(() => stage ? (
        <div className={cn("flex items-start", stl.step, { [stl['step-disabled']] : !stage.isActive })}>
            <IndexNumber index={index } />
            <Funnelbar filter={stage} isFirst={index === 1}/>
            {!isWidget && (
                <BarActions bar={stage} />
            )}
        </div>
    ) : <></>)
}

function IndexNumber({ index }: any) {
    return (
        <div className="z-10 w-6 h-6 border shrink-0 mr-4 text-sm rounded-full bg-gray-lightest flex items-center justify-center leading-3">
            {index === 0 ? <Icon size="14" color="gray-dark" name="list" /> : index}
        </div>
    );
}


function BarActions({ bar }: any) {
    return useObserver(() => (
        <div className="self-end flex items-center justify-center ml-4" style={{ marginBottom: '49px'}}>
            <button onClick={() => bar.updateKey('isActive', !bar.isActive)}>
                <Icon name="eye-slash-fill" color={bar.isActive ? "gray-light" : "gray-darkest"} size="22" />
            </button>
        </div>
    ))
}

export default FunnelWidget;