import { Egg } from '@/api/admin/egg';
import AdminBox from '@/components/admin/AdminBox';
import NodeSelect from '@/components/admin/servers/NodeSelect';
import { ServerImageContainer, ServerServiceContainer, ServerVariableContainer } from '@/components/admin/servers/ServerStartupContainer';
import BaseSettingsBox from '@/components/admin/servers/settings/BaseSettingsBox';
import FeatureLimitsBox from '@/components/admin/servers/settings/FeatureLimitsBox';
import ServerResourceBox from '@/components/admin/servers/settings/ServerResourceBox';
import Button from '@/components/elements/Button';
import Field from '@/components/elements/Field';
import FormikSwitch from '@/components/elements/FormikSwitch';
import Label from '@/components/elements/Label';
import Select from '@/components/elements/Select';
import SpinnerOverlay from '@/components/elements/SpinnerOverlay';
import FlashMessageRender from '@/components/FlashMessageRender';
import useFlash from '@/plugins/useFlash';
import { faNetworkWired } from '@fortawesome/free-solid-svg-icons';
import { Form, Formik, FormikHelpers, useFormikContext } from 'formik';
import React, { useEffect, useState } from 'react';
import { useHistory } from 'react-router-dom';
import tw from 'twin.macro';
import AdminContentBlock from '@/components/admin/AdminContentBlock';
import { object } from 'yup';
import createServer, { CreateServerRequest } from '@/api/admin/servers/createServer';
import { Allocation, Node, getAllocations } from '@/api/admin/node';

function InternalForm () {
    const { isSubmitting, isValid, setFieldValue, values: { environment } } = useFormikContext<CreateServerRequest>();

    const [ egg, setEgg ] = useState<Egg | null>(null);
    const [ node, setNode ] = useState<Node | null>(null);
    const [ allocations, setAllocations ] = useState<Allocation[] | null>(null);

    useEffect(() => {
        if (egg === null) {
            return;
        }

        setFieldValue('eggId', egg.id);
        setFieldValue('startup', '');
        setFieldValue('image', egg.dockerImages.length > 0 ? egg.dockerImages[0] : '');
    }, [ egg ]);

    useEffect(() => {
        if (node === null) {
            return;
        }

        // server_id: 0 filters out assigned allocations
        getAllocations(node.id, { filters: { server_id: '0' } })
            .then(setAllocations);
    }, [ node ]);

    return (
        <Form>
            <div css={tw`grid grid-cols-2 gap-y-6 gap-x-8 mb-16`}>
                <div css={tw`grid grid-cols-1 gap-y-6 col-span-2 md:col-span-1`}>
                    <BaseSettingsBox>
                        <NodeSelect node={node} setNode={setNode}/>
                        <div css={tw`xl:col-span-2 bg-neutral-800 border border-neutral-900 shadow-inner p-4 rounded`}>
                            <FormikSwitch
                                name={'startOnCompletion'}
                                label={'Start after installation'}
                                description={'Should the server be automatically started after it has been installed?'}
                            />
                        </div>
                    </BaseSettingsBox>
                    <FeatureLimitsBox/>
                    <ServerServiceContainer
                        egg={egg}
                        setEgg={setEgg}
                        nestId={0}
                    />
                </div>
                <div css={tw`grid grid-cols-1 gap-y-6 col-span-2 md:col-span-1`}>
                    <AdminBox icon={faNetworkWired} title={'Networking'} isLoading={isSubmitting}>
                        <div css={tw`grid grid-cols-1 gap-4 lg:gap-6`}>
                            <div>
                                <Label htmlFor={'allocation.default'}>Primary Allocation</Label>
                                <Select
                                    id={'allocation.default'}
                                    name={'allocation.default'}
                                    disabled={node === null}
                                    onChange={e => setFieldValue('allocation.default', Number(e.currentTarget.value))}
                                >
                                    {node === null ? <option value="">Select a node...</option> : <option value="">Select an allocation...</option>}
                                    {allocations?.map(a => <option key={a.id} value={a.id.toString()}>{a.getDisplayText()}</option>)}
                                </Select>
                            </div>
                            {/*<div>*/}
                            {/*    /!* TODO: Multi-select *!/*/}
                            {/*    <Label htmlFor={'allocation.additional'}>Additional Allocations</Label>*/}
                            {/*    <Select id={'allocation.additional'} name={'allocation.additional'} disabled={node === null}>*/}
                            {/*        {node === null ? <option value="">Select a node...</option> : <option value="">Select additional allocations...</option>}*/}
                            {/*        {allocations?.map(a => <option key={a.id} value={a.id.toString()}>{a.getDisplayText()}</option>)}*/}
                            {/*    </Select>*/}
                            {/*</div>*/}
                        </div>
                    </AdminBox>
                    <ServerResourceBox/>
                    <ServerImageContainer/>
                </div>

                <AdminBox title={'Startup Command'} css={tw`relative w-full col-span-2`}>
                    <SpinnerOverlay visible={isSubmitting}/>

                    <Field
                        id={'startup'}
                        name={'startup'}
                        label={'Startup Command'}
                        type={'text'}
                        description={'Edit your server\'s startup command here. The following variables are available by default: {{SERVER_MEMORY}}, {{SERVER_IP}}, and {{SERVER_PORT}}.'}
                        placeholder={egg?.startup || ''}
                    />
                </AdminBox>

                <div css={tw`col-span-2 grid grid-cols-1 md:grid-cols-2 gap-y-6 gap-x-8`}>
                    {/* This ensures that no variables are rendered unless the environment has a value for the variable. */}
                    {egg?.relationships.variables?.filter(v => Object.keys(environment).find(e => e === v.environmentVariable) !== undefined).map((v, i) => (
                        <ServerVariableContainer
                            key={i}
                            variable={v}
                        />
                    ))}
                </div>

                <div css={tw`bg-neutral-700 rounded shadow-md px-4 py-3 col-span-2`}>
                    <div css={tw`flex flex-row`}>
                        <Button
                            type="submit"
                            size="small"
                            css={tw`ml-auto`}
                            disabled={isSubmitting || !isValid}
                        >
                            Create Server
                        </Button>
                    </div>
                </div>
            </div>
        </Form>
    );
}

export default () => {
    const history = useHistory();

    const { clearFlashes, clearAndAddHttpError } = useFlash();

    const submit = (r: CreateServerRequest, { setSubmitting }: FormikHelpers<CreateServerRequest>) => {
        clearFlashes('server:create');

        createServer(r)
            .then(s => history.push(`/admin/servers/${s.id}`))
            .catch(error => clearAndAddHttpError({ key: 'server:create', error }))
            .then(() => setSubmitting(false));
    };

    return (
        <AdminContentBlock title={'New Server'}>
            <div css={tw`w-full flex flex-row items-center mb-8`}>
                <div css={tw`flex flex-col flex-shrink`} style={{ minWidth: '0' }}>
                    <h2 css={tw`text-2xl text-neutral-50 font-header font-medium`}>New Server</h2>
                    <p css={tw`text-base text-neutral-400 whitespace-nowrap overflow-ellipsis overflow-hidden`}>Add a new server to the panel.</p>
                </div>
            </div>

            <FlashMessageRender byKey={'server:create'} css={tw`mb-4`}/>

            <Formik
                onSubmit={submit}
                initialValues={{
                    externalId: '',
                    name: '',
                    description: '',
                    ownerId: 0,
                    nodeId: 0,
                    limits: {
                        memory: 1024,
                        swap: 0,
                        disk: 4096,
                        io: 500,
                        cpu: 0,
                        threads: '',
                        // This value is inverted to have the switch be on when the
                        // OOM Killer is enabled, rather than when disabled.
                        oomDisabled: false,
                    },
                    featureLimits: {
                        allocations: 1,
                        backups: 0,
                        databases: 0,
                    },
                    allocation: {
                        default: 0,
                        additional: [] as number[],
                    },
                    startup: '',
                    environment: [],
                    eggId: 0,
                    image: '',
                    skipScripts: false,
                    startOnCompletion: true,
                } as CreateServerRequest}
                validationSchema={object().shape({})}
            >
                <InternalForm/>
            </Formik>
        </AdminContentBlock>
    );
};