import { AdminContext } from '@/state/admin';
import React, { useContext, useEffect } from 'react';
import { NavLink } from 'react-router-dom';
import tw from 'twin.macro';
import getAllocations, { Context as AllocationsContext, Filters } from '@/api/admin/nodes/allocations/getAllocations';
import AdminCheckbox from '@/components/admin/AdminCheckbox';
import AdminTable, { ContentWrapper, Loading, NoItems, Pagination, TableBody, TableHead, TableHeader, useTableHooks } from '@/components/admin/AdminTable';
import DeleteAllocationButton from '@/components/admin/nodes/allocations/DeleteAllocationButton';
import CopyOnClick from '@/components/elements/CopyOnClick';
import useFlash from '@/plugins/useFlash';

function RowCheckbox ({ id }: { id: number }) {
    const isChecked = AdminContext.useStoreState(state => state.allocations.selectedAllocations.indexOf(id) >= 0);
    const appendSelectedAllocation = AdminContext.useStoreActions(actions => actions.allocations.appendSelectedAllocation);
    const removeSelectedAllocation = AdminContext.useStoreActions(actions => actions.allocations.removeSelectedAllocation);

    return (
        <AdminCheckbox
            name={id.toString()}
            checked={isChecked}
            onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
                if (e.currentTarget.checked) {
                    appendSelectedAllocation(id);
                } else {
                    removeSelectedAllocation(id);
                }
            }}
        />
    );
}

interface Props {
    nodeId: number;
    filters?: Filters;
}

function AllocationsTable ({ nodeId, filters }: Props) {
    const { clearFlashes, clearAndAddHttpError } = useFlash();

    const { page, setPage, setFilters, sort, setSort, sortDirection } = useContext(AllocationsContext);
    const { data: allocations, error, isValidating, mutate } = getAllocations(nodeId, [ 'server' ]);

    const length = allocations?.items?.length || 0;

    const setSelectedAllocations = AdminContext.useStoreActions(actions => actions.allocations.setSelectedAllocations);
    const selectedAllocationLength = AdminContext.useStoreState(state => state.allocations.selectedAllocations.length);

    const onSelectAllClick = (e: React.ChangeEvent<HTMLInputElement>) => {
        setSelectedAllocations(e.currentTarget.checked ? (allocations?.items?.map?.(allocation => allocation.id) || []) : []);
    };

    const onSearch = (query: string): Promise<void> => {
        return new Promise(resolve => {
            if (query.length < 2) {
                setFilters(filters || null);
            } else {
                setFilters({ ...filters, ip: query });
            }
            return resolve();
        });
    };

    useEffect(() => {
        setSelectedAllocations([]);
    }, [ page ]);

    useEffect(() => {
        if (!error) {
            clearFlashes('allocations');
            return;
        }

        clearAndAddHttpError({ key: 'allocations', error });
    }, [ error ]);

    return (
        <AdminTable>
            <ContentWrapper
                checked={selectedAllocationLength === (length === 0 ? -1 : length)}
                onSelectAllClick={onSelectAllClick}
                onSearch={onSearch}
            >
                <Pagination data={allocations} onPageSelect={setPage}>
                    <div css={tw`overflow-x-auto`}>
                        <table css={tw`w-full table-auto`}>
                            <TableHead>
                                <TableHeader name={'IP Address'} direction={sort === 'ip' ? (sortDirection ? 1 : 2) : null} onClick={() => setSort('ip')}/>
                                <TableHeader name={'Alias'}/>
                                <TableHeader name={'Port'} direction={sort === 'port' ? (sortDirection ? 1 : 2) : null} onClick={() => setSort('port')}/>
                                <TableHeader name={'Assigned To'}/>
                                <TableHeader/>
                            </TableHead>

                            <TableBody>
                                { allocations !== undefined && !error && !isValidating && length > 0 &&
                                allocations.items.map(allocation => (
                                    <tr key={allocation.id} css={tw`h-10 hover:bg-neutral-600`}>
                                        <td css={tw`pl-6`}>
                                            <RowCheckbox id={allocation.id}/>
                                        </td>

                                        <td css={tw`px-6 text-sm text-neutral-200 text-left whitespace-nowrap`}>
                                            <CopyOnClick text={allocation.ip}>
                                                <code css={tw`font-mono bg-neutral-900 rounded py-1 px-2`}>{allocation.ip}</code>
                                            </CopyOnClick>
                                        </td>

                                        {allocation.alias !== null ?
                                            <td css={tw`px-6 text-sm text-neutral-200 text-left whitespace-nowrap`}>
                                                <CopyOnClick text={allocation.alias}>
                                                    <code css={tw`font-mono bg-neutral-900 rounded py-1 px-2`}>{allocation.alias}</code>
                                                </CopyOnClick>
                                            </td>
                                            :
                                            <td/>
                                        }

                                        <td css={tw`px-6 text-sm text-neutral-200 text-left whitespace-nowrap`}>
                                            <CopyOnClick text={allocation.port}>
                                                <code css={tw`font-mono bg-neutral-900 rounded py-1 px-2`}>{allocation.port}</code>
                                            </CopyOnClick>
                                        </td>

                                        {allocation.relations.server !== undefined ?
                                            <td css={tw`px-6 text-sm text-neutral-200 text-left whitespace-nowrap`}>
                                                <NavLink to={`/admin/servers/${allocation.serverId}`} css={tw`text-primary-400 hover:text-primary-300`}>
                                                    {allocation.relations.server.name}
                                                </NavLink>
                                            </td>
                                            :
                                            <td/>
                                        }

                                        <td>
                                            <DeleteAllocationButton
                                                nodeId={nodeId}
                                                allocationId={allocation.id}
                                                onDeleted={async () => {
                                                    await mutate(allocations => ({
                                                        pagination: allocations!.pagination,
                                                        items: allocations!.items.filter(a => a.id === allocation.id),
                                                    }));

                                                    // Go back a page if no more items will exist on the current page.
                                                    if (allocations?.items.length - 1 % 10 === 0) {
                                                        setPage(p => p - 1);
                                                    }
                                                }}
                                            />
                                        </td>
                                    </tr>
                                ))
                                }
                            </TableBody>
                        </table>

                        { allocations === undefined || (error && isValidating) ?
                            <Loading/>
                            :
                            length < 1 ?
                                <NoItems/>
                                :
                                null
                        }
                    </div>
                </Pagination>
            </ContentWrapper>
        </AdminTable>
    );
}

export default (props: Props) => {
    const hooks = useTableHooks<Filters>(props.filters);

    return (
        <AllocationsContext.Provider value={hooks}>
            <AllocationsTable {...props} />
        </AllocationsContext.Provider>
    );
};