/* jshint esversion: 2024, module: true */

/**
 * Structured Editor for systemd-networkd configuration
 * @module StructuredEditor
 */

import { NetworkConfiguration } from './systemd-network.js';

class StructuredEditor {
    constructor(container) {
        this.container = container;
        this.config = new NetworkConfiguration();
        this.currentFile = '';
    }

    /**
     * Load configuration from text
     * @param {string} configText - Configuration text
     * @param {string} filename - File name
     */
    loadConfiguration(configText, filename) {
        this.config = NetworkConfiguration.fromSystemdConfiguration(configText);
        this.currentFile = filename;
        this.render();
    }

    /**
     * Render the structured editor
     */
    render() {
        this.container.innerHTML = this._createEditorHTML();
        this._attachEventListeners();
    }

    /**
     * Create editor HTML structure
     * @private
     * @returns {string}
     */
    _createEditorHTML() {
        return `
            <div class="structured-editor">
                <div class="editor-sections">
                    ${this._createMatchSection()}
                    ${this._createLinkSection()}
                    ${this._createNetworkSection()}
                    ${this._createDHCPSection()}
                    ${this._createAddressSections()}
                    ${this._createRouteSections()}
                </div>
                <div class="editor-actions">
                    <button class="button" id="addAddressSection">Add Address</button>
                    <button class="button" id="addRouteSection">Add Route</button>
                    <button class="button secondary" id="showRawConfig">Show Raw</button>
                </div>
            </div>
        `;
    }

    _createMatchSection() {
        const match = this.config.Match;
        return `
            <div class="config-section">
                <h4>[Match]</h4>
                <div class="config-table">
                    ${this._createInputRow('MACAddress', match.MACAddress.join(' '), 'Space-separated MAC addresses')}
                    ${this._createInputRow('Name', match.Name.join(' '), 'Interface names')}
                    ${this._createInputRow('Driver', match.Driver.join(' '), 'Driver names')}
                    ${this._createInputRow('Type', match.Type.join(' '), 'Interface types')}
                </div>
            </div>
        `;
    }

    _createLinkSection() {
        const link = this.config.Link;
        return `
            <div class="config-section">
                <h4>[Link]</h4>
                <div class="config-table">
                    ${this._createInputRow('MACAddress', link.MACAddress, 'Hardware address')}
                    ${this._createInputRow('MTUBytes', link.MTUBytes, 'Maximum transmission unit')}
                    ${this._createSelectRow('WakeOnLan', link.WakeOnLan, ['', 'phy', 'unicast', 'broadcast', 'arp', 'magic'], 'Wake-on-LAN')}
                </div>
            </div>
        `;
    }

    _createNetworkSection() {
        const network = this.config.Network;
        return `
            <div class="config-section">
                <h4>[Network]</h4>
                <div class="config-table">
                    ${this._createInputRow('Description', network.Description, 'Interface description')}
                    ${this._createSelectRow('DHCP', network.DHCP.join(' '), ['', 'yes', 'no', 'ipv4', 'ipv6'], 'DHCP client')}
                    ${this._createInputRow('DNS', network.DNS.join(' '), 'DNS servers')}
                    ${this._createInputRow('NTP', network.NTP.join(' '), 'NTP servers')}
                    ${this._createSelectRow('IPv6PrivacyExtensions', network.IPv6PrivacyExtensions, ['', 'yes', 'no', 'prefer-public'], 'IPv6 privacy extensions')}
                </div>
            </div>
        `;
    }

    _createDHCPSection() {
        const dhcp = this.config.DHCP;
        return `
            <div class="config-section">
                <h4>[DHCP]</h4>
                <div class="config-table">
                    ${this._createSelectRow('UseDNS', dhcp.UseDNS, ['', 'yes', 'no'], 'Use DNS from DHCP')}
                    ${this._createSelectRow('UseNTP', dhcp.UseNTP, ['', 'yes', 'no'], 'Use NTP from DHCP')}
                    ${this._createInputRow('RouteMetric', dhcp.RouteMetric, 'Route metric')}
                </div>
            </div>
        `;
    }

    _createAddressSections() {
        return this.config.Address.map((addr, index) => `
            <div class="config-section">
                <h4>[Address] ${index > 0 ? `#${index + 1}` : ''}</h4>
                <div class="config-table">
                    ${this._createInputRow('Address', addr.Address, 'IP address with prefix')}
                    ${this._createInputRow('Peer', addr.Peer, 'Peer address')}
                    <button class="button small remove-section" data-type="address" data-index="${index}">Remove</button>
                </div>
            </div>
        `).join('');
    }

    _createRouteSections() {
        return this.config.Route.map((route, index) => `
            <div class="config-section">
                <h4>[Route] ${index > 0 ? `#${index + 1}` : ''}</h4>
                <div class="config-table">
                    ${this._createInputRow('Gateway', route.Gateway, 'Gateway address')}
                    ${this._createInputRow('Destination', route.Destination, 'Destination prefix')}
                    ${this._createInputRow('Metric', route.Metric, 'Route metric')}
                    <button class="button small remove-section" data-type="route" data-index="${index}">Remove</button>
                </div>
            </div>
        `).join('');
    }

    _createInputRow(key, value, description) {
        return `
            <div class="config-row">
                <label class="config-label" title="${description}">
                    <abbr title="${description}">${key}</abbr>:
                </label>
                <input type="text"
                       class="config-input"
                       data-key="${key}"
                       value="${value || ''}"
                       placeholder="${description}">
            </div>
        `;
    }

    _createSelectRow(key, value, options, description) {
        const optionsHTML = options.map(opt =>
            `<option value="${opt}" ${opt === value ? 'selected' : ''}>${opt || '(not set)'}</option>`
        ).join('');

        return `
            <div class="config-row">
                <label class="config-label" title="${description}">
                    <abbr title="${description}">${key}</abbr>:
                </label>
                <select class="config-select" data-key="${key}">
                    ${optionsHTML}
                </select>
            </div>
        `;
    }

    _attachEventListeners() {
        // Input changes
        this.container.querySelectorAll('.config-input').forEach(input => {
            input.addEventListener('change', (e) => this._onInputChange(e));
        });

        // Select changes
        this.container.querySelectorAll('.config-select').forEach(select => {
            select.addEventListener('change', (e) => this._onSelectChange(e));
        });

        // Add sections
        this.container.querySelector('#addAddressSection')?.addEventListener('click', () => {
            this.config.Address.push(new (await import('./systemd-network.js')).AddressSection());
            this.render();
        });

        this.container.querySelector('#addRouteSection')?.addEventListener('click', () => {
            this.config.Route.push(new (await import('./systemd-network.js')).RouteSection());
            this.render();
        });

        // Remove sections
        this.container.querySelectorAll('.remove-section').forEach(btn => {
            btn.addEventListener('click', (e) => this._onRemoveSection(e));
        });
    }

    _onInputChange(event) {
        const input = event.target;
        const key = input.dataset.key;
        const value = input.value;

        // Update configuration based on context
        this._updateConfigValue(key, value);
    }

    _onSelectChange(event) {
        const select = event.target;
        const key = select.dataset.key;
        const value = select.value;

        this._updateConfigValue(key, value);
    }

    _updateConfigValue(key, value) {
        // This would need to be implemented based on the current section context
        console.log(`Update ${key} = ${value}`);
        // Implementation would update the this.config object
    }

    _onRemoveSection(event) {
        const btn = event.target;
        const type = btn.dataset.type;
        const index = parseInt(btn.dataset.index);

        if (type === 'address') {
            this.config.Address.splice(index, 1);
        } else if (type === 'route') {
            this.config.Route.splice(index, 1);
        }

        this.render();
    }

    /**
     * Get current configuration as text
     * @returns {string}
     */
    getConfigurationText() {
        return this.config.toSystemdConfiguration();
    }
}

export { StructuredEditor };