// Copyright (C) The Arvados Authors. All rights reserved.
//
// SPDX-License-Identifier: AGPL-3.0

import React from "react";
import classNames from "classnames";
import { connect } from "react-redux";
import { FixedSizeList } from "react-window";
import AutoSizer from "react-virtualized-auto-sizer";
import servicesProvider from "common/service-provider";
import { DownloadIcon, MoreHorizontalIcon, MoreVerticalIcon } from "components/icon/icon";
import { SearchInput } from "components/search-input/search-input";
import {
    ListItemIcon,
    StyleRulesCallback,
    Theme,
    WithStyles,
    withStyles,
    Tooltip,
    IconButton,
    Checkbox,
    CircularProgress,
    Button,
} from "@material-ui/core";
import { FileTreeData } from "../file-tree/file-tree-data";
import { TreeItem, TreeItemStatus } from "../tree/tree";
import { RootState } from "store/store";
import { WebDAV, WebDAVRequestConfig } from "common/webdav";
import { AuthState } from "store/auth/auth-reducer";
import { extractFilesData } from "services/collection-service/collection-service-files-response";
import { DefaultIcon, DirectoryIcon, FileIcon, BackIcon, SidePanelRightArrowIcon } from "components/icon/icon";
import { setCollectionFiles } from "store/collection-panel/collection-panel-files/collection-panel-files-actions";
import { sortBy } from "lodash";
import { formatFileSize } from "common/formatters";
import { getInlineFileUrl, sanitizeToken } from "views-components/context-menu/actions/helpers";
import { extractUuidKind, ResourceKind } from "models/resource";

export interface CollectionPanelFilesProps {
    isWritable: boolean;
    onUploadDataClick: (targetLocation?: string) => void;
    onSearchChange: (searchValue: string) => void;
    onItemMenuOpen: (event: React.MouseEvent<HTMLElement>, item: TreeItem<FileTreeData>, isWritable: boolean) => void;
    onOptionsMenuOpen: (event: React.MouseEvent<HTMLElement>, isWritable: boolean) => void;
    onSelectionToggle: (event: React.MouseEvent<HTMLElement>, item: TreeItem<FileTreeData>) => void;
    onCollapseToggle: (id: string, status: TreeItemStatus) => void;
    onFileClick: (id: string) => void;
    currentItemUuid: any;
    dispatch: Function;
    collectionPanelFiles: any;
    collectionPanel: any;
}

type CssRules =
    | "backButton"
    | "backButtonHidden"
    | "pathPanelPathWrapper"
    | "uploadButton"
    | "uploadIcon"
    | "moreOptionsButton"
    | "moreOptions"
    | "loader"
    | "wrapper"
    | "dataWrapper"
    | "row"
    | "rowEmpty"
    | "leftPanel"
    | "rightPanel"
    | "pathPanel"
    | "pathPanelItem"
    | "rowName"
    | "listItemIcon"
    | "rowActive"
    | "pathPanelMenu"
    | "rowSelection"
    | "leftPanelHidden"
    | "leftPanelVisible"
    | "searchWrapper"
    | "searchWrapperHidden";

const styles: StyleRulesCallback<CssRules> = (theme: Theme) => ({
    wrapper: {
        display: "flex",
        minHeight: "600px",
        color: "rgba(0,0,0,0.87)",
        fontSize: "0.875rem",
        fontFamily: '"Roboto", "Helvetica", "Arial", sans-serif',
        fontWeight: 400,
        lineHeight: "1.5",
        letterSpacing: "0.01071em",
    },
    backButton: {
        color: "#00bfa5",
        cursor: "pointer",
        float: "left",
    },
    backButtonHidden: {
        display: "none",
    },
    dataWrapper: {
        minHeight: "500px",
    },
    row: {
        display: "flex",
        marginTop: "0.5rem",
        marginBottom: "0.5rem",
        cursor: "pointer",
        "&:hover": {
            backgroundColor: "rgba(0, 0, 0, 0.08)",
        },
    },
    rowEmpty: {
        top: "40%",
        width: "100%",
        textAlign: "center",
        position: "absolute",
    },
    loader: {
        top: "50%",
        left: "50%",
        marginTop: "-15px",
        marginLeft: "-15px",
        position: "absolute",
    },
    rowName: {
        display: "inline-flex",
        flexDirection: "column",
        justifyContent: "center",
    },
    searchWrapper: {
        display: "inline-block",
        marginBottom: "1rem",
        marginLeft: "1rem",
    },
    searchWrapperHidden: {
        width: "0px",
    },
    rowSelection: {
        padding: "0px",
    },
    rowActive: {
        color: `${theme.palette.primary.main} !important`,
    },
    listItemIcon: {
        display: "inline-flex",
        flexDirection: "column",
        justifyContent: "center",
    },
    pathPanelMenu: {
        float: "right",
        marginTop: "-15px",
    },
    pathPanel: {
        padding: "0.5rem",
        marginBottom: "0.5rem",
        backgroundColor: "#fff",
        boxShadow: "0px 1px 3px 0px rgb(0 0 0 / 20%), 0px 1px 1px 0px rgb(0 0 0 / 14%), 0px 2px 1px -1px rgb(0 0 0 / 12%)",
    },
    pathPanelPathWrapper: {
        display: "inline-block",
    },
    leftPanel: {
        flex: 0,
        padding: "0 1rem 1rem",
        marginRight: "1rem",
        whiteSpace: "nowrap",
        position: "relative",
        backgroundColor: "#fff",
        boxShadow: "0px 3px 3px 0px rgb(0 0 0 / 20%), 0px 3px 1px 0px rgb(0 0 0 / 14%), 0px 3px 1px -1px rgb(0 0 0 / 12%)",
    },
    leftPanelVisible: {
        opacity: 1,
        flex: "50%",
        animation: `animateVisible 1000ms ${theme.transitions.easing.easeOut}`,
    },
    leftPanelHidden: {
        opacity: 0,
        flex: "initial",
        padding: "0",
        marginRight: "0",
    },
    "@keyframes animateVisible": {
        "0%": {
            opacity: 0,
            flex: "initial",
        },
        "100%": {
            opacity: 1,
            flex: "50%",
        },
    },
    rightPanel: {
        flex: "50%",
        padding: "1rem",
        paddingTop: "0.5rem",
        marginTop: "-0.5rem",
        position: "relative",
        backgroundColor: "#fff",
        boxShadow: "0px 3px 3px 0px rgb(0 0 0 / 20%), 0px 3px 1px 0px rgb(0 0 0 / 14%), 0px 3px 1px -1px rgb(0 0 0 / 12%)",
    },
    pathPanelItem: {
        cursor: "pointer",
    },
    uploadIcon: {
        transform: "rotate(180deg)",
    },
    uploadButton: {
        float: "right",
    },
    moreOptionsButton: {
        width: theme.spacing.unit * 3,
        height: theme.spacing.unit * 3,
        marginRight: theme.spacing.unit,
        marginTop: "auto",
        marginBottom: "auto",
        justifyContent: "center",
    },
    moreOptions: {
        position: "absolute",
    },
});

const pathPromise = {};

export const CollectionPanelFiles = withStyles(styles)(
    connect((state: RootState) => ({
        auth: state.auth,
        collectionPanel: state.collectionPanel,
        collectionPanelFiles: state.collectionPanelFiles,
    }))((props: CollectionPanelFilesProps & WithStyles<CssRules> & { auth: AuthState }) => {
        const { classes, onItemMenuOpen, onUploadDataClick, isWritable, dispatch, collectionPanelFiles, collectionPanel } = props;
        const { apiToken, config } = props.auth;

        const webdavClient = new WebDAV({
            baseURL: config.keepWebServiceUrl,
            headers: {
                Authorization: `Bearer ${apiToken}`,
            },
        });

        const webDAVRequestConfig: WebDAVRequestConfig = {
            headers: {
                Depth: "1",
            },
        };

        const parentRef = React.useRef(null);
        const [path, setPath] = React.useState<string[]>([]);
        const [pathData, setPathData] = React.useState({});
        const [isLoading, setIsLoading] = React.useState(false);
        const [leftSearch, setLeftSearch] = React.useState("");
        const [rightSearch, setRightSearch] = React.useState("");

        const leftKey = (path.length > 1 ? path.slice(0, path.length - 1) : path).join("/");
        const rightKey = path.join("/");

        const leftData = pathData[leftKey] || [];
        const rightData = pathData[rightKey];

        React.useEffect(() => {
            if (props.currentItemUuid && extractUuidKind(props.currentItemUuid) === ResourceKind.COLLECTION) {
                setPathData({});
                setPath([props.currentItemUuid]);
            }
        }, [props.currentItemUuid]);

        const fetchData = (keys, ignoreCache = false) => {
            const keyArray = Array.isArray(keys) ? keys : [keys];

            Promise.all(
                keyArray
                    .filter(key => !!key)
                    .map(key => {
                        const dataExists = !!pathData[key];
                        const runningRequest = pathPromise[key];

                        if (ignoreCache || (!dataExists && !runningRequest)) {
                            if (!isLoading) {
                                setIsLoading(true);
                            }

                            pathPromise[key] = true;

                            return webdavClient.propfind(`c=${key}`, webDAVRequestConfig);
                        }

                        return Promise.resolve(null);
                    })
                    .filter(promise => !!promise)
            )
                .then(requests => {
                    const newState = requests
                        .map((request, index) => {
                            if (request && request.responseXML != null) {
                                const key = keyArray[index];
                                const result: any = extractFilesData(request.responseXML);
                                const sortedResult = sortBy(result, n => n.name).sort((n1, n2) => {
                                    if (n1.type === "directory" && n2.type !== "directory") {
                                        return -1;
                                    }
                                    if (n1.type !== "directory" && n2.type === "directory") {
                                        return 1;
                                    }
                                    return 0;
                                });

                                return { [key]: sortedResult };
                            }
                            return {};
                        })
                        .reduce((prev, next) => {
                            return { ...next, ...prev };
                        }, {});
                    setPathData(state => ({ ...state, ...newState }));
                }, () => {
                    // Nothing to do
                })
                .finally(() => {
                    setIsLoading(false);
                    keyArray.forEach(key => delete pathPromise[key]);
                });
        };

        React.useEffect(() => {
            if (rightKey) {
                fetchData(rightKey);
                setLeftSearch("");
                setRightSearch("");
            }
        }, [rightKey, rightData]); // eslint-disable-line react-hooks/exhaustive-deps

        const currentPDH = (collectionPanel.item || {}).portableDataHash;
        React.useEffect(() => {
            if (currentPDH) {
                fetchData([leftKey, rightKey], true);
            }
        }, [currentPDH]); // eslint-disable-line react-hooks/exhaustive-deps

        React.useEffect(() => {
            if (rightData) {
                const filtered = rightData.filter(({ name }) => name.indexOf(rightSearch) > -1);
                setCollectionFiles(filtered, false)(dispatch);
            }
        }, [rightData, dispatch, rightSearch]);

        const handleRightClick = React.useCallback(
            event => {
                event.preventDefault();
                let elem = event.target;

                while (elem && elem.dataset && !elem.dataset.item) {
                    elem = elem.parentNode;
                }

                if (!elem || !elem.dataset) {
                    return;
                }

                const { id } = elem.dataset;

                const item: any = {
                    id,
                    data: rightData.find(elem => elem.id === id),
                };

                if (id) {
                    onItemMenuOpen(event, item, isWritable);
                }
            },
            [onItemMenuOpen, isWritable, rightData]
        );

        React.useEffect(() => {
            let node = null;

            if (parentRef?.current) {
                node = parentRef.current;
                (node as any).addEventListener("contextmenu", handleRightClick);
            }

            return () => {
                if (node) {
                    (node as any).removeEventListener("contextmenu", handleRightClick);
                }
            };
        }, [parentRef, handleRightClick]);

        const handleClick = React.useCallback(
            (event: any) => {
                let isCheckbox = false;
                let isMoreButton = false;
                let elem = event.target;

                if (elem.type === "checkbox") {
                    isCheckbox = true;
                }
                // The "More options" button click event could be triggered on its
                // internal graphic element.
                else if (
                    (elem.dataset && elem.dataset.id === "moreOptions") ||
                    (elem.parentNode && elem.parentNode.dataset && elem.parentNode.dataset.id === "moreOptions")
                ) {
                    isMoreButton = true;
                }

                while (elem && elem.dataset && !elem.dataset.item) {
                    elem = elem.parentNode;
                }

                if (elem && elem.dataset && !isCheckbox && !isMoreButton) {
                    const { parentPath, subfolderPath, breadcrumbPath, type } = elem.dataset;

                    if (breadcrumbPath) {
                        const index = path.indexOf(breadcrumbPath);
                        setPath(state => [...state.slice(0, index + 1)]);
                    }

                    if (parentPath && type === "directory") {
                        if (path.length > 1) {
                            path.pop();
                        }

                        setPath(state => [...state, parentPath]);
                    }

                    if (subfolderPath && type === "directory") {
                        setPath(state => [...state, subfolderPath]);
                    }

                    if (elem.dataset.id && type === "file") {
                        const item = rightData.find(({ id }) => id === elem.dataset.id) || leftData.find(({ id }) => id === elem.dataset.id);
                        const enhancedItem = servicesProvider.getServices().collectionService.extendFileURL(item);
                        const fileUrl = sanitizeToken(
                            getInlineFileUrl(enhancedItem.url, config.keepWebServiceUrl, config.keepWebInlineServiceUrl),
                            true
                        );
                        window.open(fileUrl, "_blank");
                    }
                }

                if (isCheckbox) {
                    const { id } = elem.dataset;
                    const item = collectionPanelFiles[id];
                    props.onSelectionToggle(event, item);
                }
                if (isMoreButton) {
                    const { id } = elem.dataset;
                    const item: any = {
                        id,
                        data: rightData.find(elem => elem.id === id),
                    };
                    onItemMenuOpen(event, item, isWritable);
                }
            },
            [path, setPath, collectionPanelFiles] // eslint-disable-line react-hooks/exhaustive-deps
        );

        const getItemIcon = React.useCallback(
            (type: string, activeClass: string | null) => {
                let Icon = DefaultIcon;

                switch (type) {
                    case "directory":
                        Icon = DirectoryIcon;
                        break;
                    case "file":
                        Icon = FileIcon;
                        break;
                }

                return (
                    <ListItemIcon className={classNames(classes.listItemIcon, activeClass)}>
                        <Icon />
                    </ListItemIcon>
                );
            },
            [classes]
        );

        const getActiveClass = React.useCallback(
            name => {
                return path[path.length - 1] === name ? classes.rowActive : null;
            },
            [path, classes]
        );

        const onOptionsMenuOpen = React.useCallback(
            (ev, isWritable) => {
                props.onOptionsMenuOpen(ev, isWritable);
            },
            [props.onOptionsMenuOpen] // eslint-disable-line react-hooks/exhaustive-deps
        );

        return (
            <div
                data-cy="collection-files-panel"
                onClick={handleClick}
                ref={parentRef}
            >
                <div className={classes.pathPanel}>
                    <div className={classes.pathPanelPathWrapper}>
                        {path.map((p: string, index: number) => (
                            <span
                                key={`${index}-${p}`}
                                data-item="true"
                                className={classes.pathPanelItem}
                                data-breadcrumb-path={p}
                            >
                                <span className={classes.rowActive}>{index === 0 ? "Home" : p}</span> <b>/</b>&nbsp;
                            </span>
                        ))}
                    </div>
                    <Tooltip
                        className={classes.pathPanelMenu}
                        title="More options"
                        disableFocusListener
                    >
                        <IconButton
                            data-cy="collection-files-panel-options-btn"
                            onClick={ev => {
                                onOptionsMenuOpen(ev, isWritable);
                            }}
                        >
                            <MoreVerticalIcon />
                        </IconButton>
                    </Tooltip>
                </div>
                <div className={classes.wrapper}>
                    <div
                        className={classNames(classes.leftPanel, path.length > 1 ? classes.leftPanelVisible : classes.leftPanelHidden)}
                        data-cy="collection-files-left-panel"
                    >
                        <Tooltip
                            title="Go back"
                            className={path.length > 1 ? classes.backButton : classes.backButtonHidden}
                        >
                            <IconButton onClick={() => setPath(state => [...state.slice(0, state.length - 1)])}>
                                <BackIcon />
                            </IconButton>
                        </Tooltip>
                        <div className={path.length > 1 ? classes.searchWrapper : classes.searchWrapperHidden}>
                            <SearchInput
                                selfClearProp={leftKey}
                                label="Search"
                                value={leftSearch}
                                onSearch={setLeftSearch}
                            />
                        </div>
                        <div className={classes.dataWrapper}>
                            {leftData ? (
                                <AutoSizer defaultWidth={0}>
                                    {({ height, width }) => {
                                        const filtered = leftData.filter(({ name }) => name.indexOf(leftSearch) > -1);
                                        return !!filtered.length ? (
                                            <FixedSizeList
                                                height={height}
                                                itemCount={filtered.length}
                                                itemSize={35}
                                                width={width}
                                            >
                                                {({ index, style }) => {
                                                    const { id, type, name } = filtered[index];
                                                    return (
                                                        <div
                                                            data-id={id}
                                                            style={style}
                                                            data-item="true"
                                                            data-type={type}
                                                            data-parent-path={name}
                                                            className={classNames(classes.row, getActiveClass(name))}
                                                            key={id}
                                                        >
                                                            {getItemIcon(type, getActiveClass(name))}
                                                            <div className={classes.rowName}>{name}</div>
                                                            {getActiveClass(name) ? (
                                                                <SidePanelRightArrowIcon
                                                                    style={{ display: "inline", marginTop: "5px", marginLeft: "5px" }}
                                                                />
                                                            ) : null}
                                                        </div>
                                                    );
                                                }}
                                            </FixedSizeList>
                                        ) : (
                                            <div className={classes.rowEmpty}>No directories available</div>
                                        );
                                    }}
                                </AutoSizer>
                            ) : (
                                <div
                                    data-cy="collection-loader"
                                    className={classes.row}
                                >
                                    <CircularProgress
                                        className={classes.loader}
                                        size={30}
                                    />
                                </div>
                            )}
                        </div>
                    </div>
                    <div
                        className={classes.rightPanel}
                        data-cy="collection-files-right-panel"
                    >
                        <div className={classes.searchWrapper}>
                            <SearchInput
                                selfClearProp={rightKey}
                                label="Search"
                                value={rightSearch}
                                onSearch={setRightSearch}
                            />
                        </div>
                        {isWritable && (
                            <Button
                                className={classes.uploadButton}
                                data-cy="upload-button"
                                onClick={() => {
                                    onUploadDataClick(rightKey === leftKey ? undefined : rightKey);
                                }}
                                variant="contained"
                                color="primary"
                                size="small"
                            >
                                <DownloadIcon className={classes.uploadIcon} />
                                Upload data
                            </Button>
                        )}
                        <div className={classes.dataWrapper}>
                            {rightData && !isLoading ? (
                                <AutoSizer defaultHeight={500}>
                                    {({ height, width }) => {
                                        const filtered = rightData.filter(({ name }) => name.indexOf(rightSearch) > -1);
                                        return !!filtered.length ? (
                                            <FixedSizeList
                                                height={height}
                                                itemCount={filtered.length}
                                                itemSize={35}
                                                width={width}
                                            >
                                                {({ index, style }) => {
                                                    const { id, type, name, size } = filtered[index];

                                                    return (
                                                        <div
                                                            style={style}
                                                            data-id={id}
                                                            data-item="true"
                                                            data-type={type}
                                                            data-subfolder-path={name}
                                                            className={classes.row}
                                                            key={id}
                                                        >
                                                            <Checkbox
                                                                color="primary"
                                                                className={classes.rowSelection}
                                                                checked={collectionPanelFiles[id] ? collectionPanelFiles[id].value.selected : false}
                                                            />
                                                            &nbsp;
                                                            {getItemIcon(type, null)}
                                                            <div className={classes.rowName}>{name}</div>
                                                            <span
                                                                className={classes.rowName}
                                                                style={{
                                                                    marginLeft: "auto",
                                                                    marginRight: "1rem",
                                                                }}
                                                            >
                                                                {formatFileSize(size)}
                                                            </span>
                                                            <Tooltip
                                                                title="More options"
                                                                disableFocusListener
                                                            >
                                                                <IconButton
                                                                    data-id="moreOptions"
                                                                    data-cy="file-item-options-btn"
                                                                    className={classes.moreOptionsButton}
                                                                >
                                                                    <MoreHorizontalIcon
                                                                        data-id="moreOptions"
                                                                        className={classes.moreOptions}
                                                                    />
                                                                </IconButton>
                                                            </Tooltip>
                                                        </div>
                                                    );
                                                }}
                                            </FixedSizeList>
                                        ) : (
                                            <div className={classes.rowEmpty}>This collection is empty</div>
                                        );
                                    }}
                                </AutoSizer>
                            ) : (
                                <div className={classes.row}>
                                    <CircularProgress
                                        className={classes.loader}
                                        size={30}
                                    />
                                </div>
                            )}
                        </div>
                    </div>
                </div>
            </div>
        );
    })
);