import { html, render, useState, useEffect } from './vendor/preact/standalone.js';

import { getRecords, createRecords } from './api.js';


const rdataInputProperties = {
    Address: {label: 'Adresse', type: 'text'},
    Serial: {label: 'Numéro de série', type: 'number'},
    Minimum: {label: 'Minimum', type: 'number'},
    Retry: {label: 'Nouvelle tentative', type: 'number'},
    Refresh: {label: 'Actualisation', type: 'number'},
    MaintainerName: {label: 'Contact', type: 'text'},
    MasterServerName: {label: 'Serveur primaire', type: 'text'},
    Expire: {label: 'Expiration', type: 'number'},
    Target: {label: 'Cible', type: 'text'},
};

const realRecordDataConfig = {
    'A': {
        friendlyType: 'address',
        fields: ['Address'],
    },
    'AAAA': {
        friendlyType: 'address',
        fields: ['Address'],
    },
    'CNAME': {
        friendlyType: 'alias',
        fields: ['Target'],
    },
    'SRV': {
        friendlyType: 'service',
        fields: [ /* TODO */ ],
    },
    'NS': {
        friendlyType: 'name_server',
        fields: ['Target'],
    },
    'SOA': {
        friendlyType: 'soa',
        fields: ['MasterServerName', 'MaintainerName', 'Refresh', 'Retry', 'Expire', 'Minimum', 'Serial'],
    },
};

function defaultBuildData(realRecordType) {
    const defaultFields = realRecordDataConfig[realRecordType].fields.map(field => [field, null]);
    return (fields) => {
        return {...defaultFields, ...fields, Type: realRecordType};
    }
}

function defaultRecordToField(realRecord) {
    const type = realRecord.Type;
    return realRecordDataConfig[type].fields.map(field => [field, realRecord[field]]);
}


const friendlyRecordDataConfig = {
    'address': {
        realRecordToFields: defaultRecordToField,
        fields: realRecordDataConfig['AAAA'].fields,
        buildData: buildAddressRecord,
    },
    'alias': {
        realRecordToFields: defaultRecordToField,
        fields: realRecordDataConfig['CNAME'].fields,
        buildData: defaultBuildData('CNAME'),
    },
    'name_server': {
        realRecordToFields: defaultRecordToField,
        fields: realRecordDataConfig['CNAME'].fields,
        buildData: defaultBuildData('NS'),
    },
    'soa': {
        realRecordToFields: defaultRecordToField,
        fields: realRecordDataConfig['SOA'].fields,
        buildData: defaultBuildData('SOA'),
    },
};


const recordTypeNames = {
    'address': 'Adresse IP',
    'service': 'Service',
    'alias': 'Alias',
    'name_server': 'Serveur de nom',
    'soa': 'SOA',
}

/* Type to use for SRV to derive name without port / service */
function getNameForRecord(name, type) {
    return name;
}

/* Name to use with _spf for example */
function getFriendlyTypeForRecord(name, type) {
    return realRecordDataConfig[type].friendlyType;
}

function processRecords(records) {
    return records.reduce((acc, record) => {
        let name = getNameForRecord(record.Name, record.Type);
        let type = getFriendlyTypeForRecord(record.Name, record.Type);
        if (!(name in acc)) {
            acc[name] = {};
        }
        if (!(type in acc[name])) {
            acc[name][type] = [];
        }
        acc[name][type].push(record);
        return acc;
    }, {});
}

function buildAddressRecord({ Address = ''}) {
    return {
        Type: Address.indexOf(':') > -1 ? 'AAAA' : 'A',
        Address
    }
}

function FriendlyRecord({type, record}) {
    let keys = friendlyRecordDataConfig[type].realRecordToFields(record);
    if (keys.length == 1) {
        return html`<span>${keys[0][1]}</span>`;
    } else {
        return html`
            <dl>
                ${keys.map(([name, value]) => {return html`<dt><span>${rdataInputProperties[name].label}</span></dt><dd>${value}</dd>`})}
            </dl>
        `;
    }
}

function RecordsByName({ name, recordSets }) {
    return html`
        <article>
            <h3>${name}</h4>
            <div>
                ${Object.entries(recordSets).map(
                    ([type, records]) => {
                        return html`
                            <article>
                                <h4>${recordTypeNames[type]}</h4>
                                <ul>
                                    ${records.map(record => html`<li><${FriendlyRecord} type=${type} record=${record}/></li>`)}
                                </ul>
                            </article>
                        `;
                    }
                )}
            </div>
        </article>
    `;
}



function RecordListFriendly({ zone }) {
    const [records, setRecords] = useState({});
    const [editable, setEditable] = useState(false);

    useEffect(() => {
        getRecords(zone)
            .then((res) => setRecords(processRecords(res)));
    }, [zone]);

    return html`
        ${Object.entries(records).map(
            ([name, recordSets]) => {
                return html`
                    <${RecordsByName} name=${name} recordSets=${recordSets}/>
                `;
            }
        )}
    `;
}

function NewRecordFormFriendly({ zone, enabled, id, onCancel }) {
    const [recordType, setRecordType] = useState(Object.keys(recordTypeNames)[0]);
    const [recordData, setRecordData] = useState({});
    const [realRecordData, setRealRecordData] = useState({});
    const [realType, setRealType] = useState('');
    const [domain, setDomain] = useState('');
    const [ttl, setTTL] = useState(3600);

    const setRecordDataFactory = (field) => {
        return (e) => {
            const newData = {...recordData};
            newData[field] = e.target.value;
            const newRealRecordData = friendlyRecordDataConfig[recordType].buildData(newData)
            setRecordData(newData);
            setRealRecordData(newRealRecordData);
            setRealType(newRealRecordData.Type);
        }
    }

    const createNewRecord = (e) => {
        e.preventDefault();
        const newRecords = [{...realRecordData, Class: 'IN', TTL: ttl, Name: `${domain}.${zone}`}];
        console.log(newRecords)
        createRecords(zone, newRecords);
    }

    // TODO: Reset valeurs champs quand changement de type => bound la valeur de l'input au state
    // TODO: Dans le cas où un domain est dans le RDATA mettre le domaine absolue dans la preview
    // TODO: Déplacer preview dans son component, faire une vue en "diff" et l'appeler "prévisualisation des changements"
    // TODO: Validation des données client et serveur

    return html`
        <form class="new-record ${enabled ? '' : 'disabled'}" id=${id}>
            <h3>Nouvel enregistrement</h3>
            <div class="form-row">
                <div class="input-group">
                    <label for="domain">Domaine</label>
                    <div class="combined-input">
                        <input type="text" id="domain" name="domain" onChange=${e => setDomain(e.target.value)}/>
                        <span>.${ zone }</span>
                    </div>
                </div>
                <div class="input-group">
                    <label for="record_type">Type d'enregistrement</label>
                    <select id="record_type" name="record_type" onChange=${e => { setRecordType(e.target.value); setRealType(''); setRecordData({}); setRealRecordData({})}}>
                        ${Object.entries(recordTypeNames).map(([type, name]) => html`<option value="${type}">${name}</option>`)}
                    </select>
                </div>
                <div>
                    ${friendlyRecordDataConfig[recordType].fields.map(fieldName => html`
                    <div class="input-group">
                            <label for="${fieldName}">${rdataInputProperties[fieldName].label}</label>
                            <input id="${fieldName}" type="${rdataInputProperties[fieldName].type}" onChange=${setRecordDataFactory(fieldName)}></input>
                        </div>
                    `)}
                </div>
                <div class="input-group">
                    <label for="ttl">TTL</label>
                    <input type="number" name="ttl" id="ttl" value="${ttl}" onChange=${e => setTTL(e.target.value)}/>
                </div>
            </div>
            <article class="preview">
                <h4>Prévisualisation de l'enregistrement</h3>
                <pre>
                    ${domain == '' ? '@' : domain + '.' + zone} ${ttl} IN ${realType} ${realType != '' ? realRecordDataConfig[realType].fields.map(field => realRecordData[field]).join(' ') : ''}
                </pre>
            </article>
            <div>
                <input type="submit" onClick=${createNewRecord} value="Ajouter"/>
                <button role="button" onClick=${onCancel}>Anuler</button>
            </div>
        </form>
    `;
}

function ZoneRecords({ zone }) {
    const [addNewRecord, setAddNewRecord] = useState(true);

    const onCancelNewRecord = (e) => { setAddNewRecord(false); e.preventDefault() };

    return html`
        <header>
            <h2>Enregistrements</h2>
            <button onClick=${() => setAddNewRecord(true)} aria-controls="add-new-record-form" aria-expanded=${addNewRecord} disabled=${addNewRecord}>Ajouter un enregistrement</button>
            <button>Éditer la zone</button>
        </header>
        <${NewRecordFormFriendly} zone=${zone} enabled=${addNewRecord} id="add-new-record-form" onCancel=${onCancelNewRecord}/>
        <div class="zone-content">
            <${RecordListFriendly} zone=${zone} />
        </div>
    `;
}

export default function(element, { zone }) {
    render(html`<${ZoneRecords} zone=${zone} />`, element);
};