import React, { useContext, useMemo, useState } from "react"
import Style from "./RepositoryViewer.module.css"
import ContextLanguage from "../../contexts/ContextLanguage"
import useBackendResource from "../../hooks/useBackendResource"
import useBackendViewset from "../../hooks/useBackendViewset"
import objectToWordcloudFormat from "../../utils/objectToWordcloudFormat"
import countTweetWords from "../../utils/countTweetWords"
import BoxHeader from "../base/BoxHeader"
import Loading from "../base/Loading"
import { FontAwesomeIcon } from "@fortawesome/react-fontawesome"
import { faFolder, faFolderOpen } from "@fortawesome/free-solid-svg-icons"
import BoxRepositoryTweets from "../interactive/BoxRepositoryTweets"
import PickerVisualization from "../interactive/PickerVisualization"
import BoxVisualizationWordcloud from "../interactive/BoxVisualizationWordcloud"
import BoxVisualizationChart from "../interactive/BoxVisualizationChart"
import BoxVisualizationMap from "../interactive/BoxVisualizationMap"
import BoxVisualizationStats from "../interactive/BoxVisualizationStats"
import PickerFilter from "../interactive/PickerFilter"
import useArrayState from "../../hooks/useArrayState"
import BoxFilters from "../interactive/BoxFilters"
import ContextRepositoryViewer from "../../contexts/ContextRepositoryViewer"
import BoxFilterContains from "../interactive/BoxFilterContains"
import BoxFilterUser from "../interactive/BoxFilterUser"
import BoxFilterHashtag from "../interactive/BoxFilterHashtag"
import BoxFilterLocation from "../interactive/BoxFilterLocation"
import useMapAreaState from "../../hooks/useMapAreaState"
import BoxFilterDatetime from "../interactive/BoxFilterDatetime"
import BoxFilterHasPlace from "../interactive/BoxFilterHasPlace"
import BoxFilterHasImage from "../interactive/BoxFilterHasImage"
import BoxFilterIsNotRetweet from "../interactive/BoxFilterIsNotRetweet"
import PageWithHeader from "../base/layout/PageWithHeader"
import AlertError from "../interactive/AlertError"


export default function RepositoryViewer({ id, className, ...props }) {
    const { strings } = useContext(ContextLanguage)

    // State
    const [visualizationTab, setVisualizationTab] = useState("stats")
    const [filterTab, setFilterTab] = useState("contains")
    const {
        value: filters,
        setValue: setFilters,
        appendValue: appendFilter,
        spliceValue: spliceFilter,
        removeValue: removeFilter,
    } = useArrayState([])

    // FIXME: this has a severe performance impact, investigate
    const mapViewHook = useMapAreaState()

    // Repository
    const {
        resource: repository,
        error: repositoryError,
        firstLoad: repositoryFirstLoad,
    } = useBackendResource(
        `/api/v1/repositories/${id}`,
        {
            retrieve: true,
            edit: true,
            destroy: true,
            action: false,
        },
    )

    // Tweets
    const {
        resources: tweets,
        error: tweetsError,
        firstLoad: tweetsFirstLoad,
    } = useBackendViewset(
        `/api/v1/repositories/${id}/tweets/`,
        "snowflake",
        {
            list: true,
            create: false,
            retrieve: false,
            edit: false,
            destroy: false,
            command: false,
            action: false,
        },
    )

    // Filtering
    const filteredTweets = useMemo(
        () => {
            let tempTweets = tweets
            for(const filter of filters) {
                tempTweets = tempTweets.filter(tweet => filter.exec(tweet))
            }
            return tempTweets
        },
        [tweets, filters]
    )

    // Words
    const words = useMemo(
        () => objectToWordcloudFormat(countTweetWords(filteredTweets)),
        [filteredTweets],
    )

    // Page header
    const header = useMemo(
        () => (
            <BoxHeader>
                <FontAwesomeIcon icon={repository?.is_active ? faFolderOpen : faFolder}/> {repository?.name}
            </BoxHeader>
        ),
        [repository?.is_active, repository?.name]
    )

    // Page contents
    const contents = useMemo(
        () => {
            if(!repositoryFirstLoad || !tweetsFirstLoad) {
                return <Loading/>
            }
            else if(repositoryError) {
                return <AlertError error={repositoryError}/>
            }
            else if(tweetsError) {
                return <AlertError error={tweetsError}/>
            }
            else {
                return (
                    <div className={Style.RepositoryViewer}>
                        <BoxRepositoryTweets className={Style.Tweets}/>
                        <PickerVisualization className={Style.VisualizationPicker}/>
                        {visualizationTab === "wordcloud" ? <BoxVisualizationWordcloud className={Style.Visualization}/> : null}
                        {visualizationTab === "chart" ? <BoxVisualizationChart className={Style.Visualization}/> : null}
                        {visualizationTab === "map" ? <BoxVisualizationMap className={Style.Visualization}/> : null}
                        {visualizationTab === "stats" ? <BoxVisualizationStats className={Style.Visualization}/> : null}

                        <BoxFilters className={Style.Filters}/>
                        <PickerFilter className={Style.FilterPicker}/>
                        {filterTab === "contains" ? <BoxFilterContains className={Style.AddFilter}/> : null}
                        {filterTab === "hashtag" ? <BoxFilterHashtag className={Style.AddFilter}/> : null}
                        {filterTab === "user" ? <BoxFilterUser className={Style.AddFilter}/> : null}
                        {filterTab === "retweet" ? <BoxFilterIsNotRetweet className={Style.AddFilter}/> : null}
                        {filterTab === "image" ? <BoxFilterHasImage className={Style.AddFilter}/> : null}
                        {filterTab === "time" ? <BoxFilterDatetime className={Style.AddFilter}/> : null}
                        {filterTab === "place" ? <BoxFilterHasPlace className={Style.AddFilter}/> : null}
                        {filterTab === "location" ? <BoxFilterLocation className={Style.AddFilter}/> : null}
                    </div>
                )
            }
        },
        [repositoryFirstLoad, tweetsFirstLoad, visualizationTab, filterTab]
    )

    return (
        <ContextRepositoryViewer.Provider
            value={{
                visualizationTab,
                setVisualizationTab,
                filterTab,
                setFilterTab,
                filters,
                setFilters,
                appendFilter,
                spliceFilter,
                removeFilter,
                repository,
                rawTweets: tweets,
                tweets: filteredTweets,
                words,
                mapViewHook,
            }}
        >
            <PageWithHeader header={header}>
                {contents}
            </PageWithHeader>
        </ContextRepositoryViewer.Provider>
    )
}