/** @odoo-module **/

import { Component, useState, onWillStart, onWillUnmount } from "@odoo/owl";
import { useService } from "@web/core/utils/hooks";
import { BluetoothPrinterConfig } from "./bluetooth_printer_config";
import { ConfirmationDialog } from "@web/core/confirmation_dialog/confirmation_dialog";
import { BluetoothPrinterStorage } from "./storage_manager";

/**
 * Bluetooth Connection Status Widget
 * 
 * Displays the current connection status of the bluetooth thermal printer
 * with visual indicators and detailed tooltip information.
 * 
 * Status states:
 * - connected: Green indicator, printer is connected and ready
 * - disconnected: Red indicator, printer is not connected
 * - connecting: Yellow indicator with animation, attempting to connect
 * - error: Red indicator with error icon, connection error occurred
 */
export class BluetoothConnectionStatus extends Component {
    static template = "pos_bluetooth_thermal_printer.BluetoothConnectionStatus";

    setup() {
        this.dialog = useService("dialog");
        this.notification = useService("notification");
        this.storageManager = new BluetoothPrinterStorage();
        
        this.state = useState({
            status: 'disconnected',
            deviceName: null,
            lastError: null,
            reconnectAttempts: 0,
            isReconnecting: false,
            timestamp: null,
            showTooltip: false
        });

        // Get the bluetooth printer manager service
        // This will be injected when the component is used in the POS
        this.bluetoothManager = this.props.bluetoothManager;

        onWillStart(() => {
            this._initializeStatus();
            this._subscribeToEvents();
        });

        onWillUnmount(() => {
            this._unsubscribeFromEvents();
        });
    }

    /**
     * Initialize status from bluetooth manager
     * @private
     */
    _initializeStatus() {
        if (this.bluetoothManager) {
            const info = this.bluetoothManager.getConnectionInfo();
            this._updateStatus(info);
        }
    }

    /**
     * Subscribe to bluetooth manager events
     * @private
     */
    _subscribeToEvents() {
        if (this.bluetoothManager) {
            this._statusChangeHandler = (data) => this._onStatusChanged(data);
            this.bluetoothManager.addEventListener(
                'connection-status-changed',
                this._statusChangeHandler
            );
        }
    }

    /**
     * Unsubscribe from bluetooth manager events
     * @private
     */
    _unsubscribeFromEvents() {
        if (this.bluetoothManager && this._statusChangeHandler) {
            this.bluetoothManager.removeEventListener(
                'connection-status-changed',
                this._statusChangeHandler
            );
        }
    }

    /**
     * Handle connection status change event
     * @private
     * @param {Object} data - Event data
     */
    _onStatusChanged(data) {
        // Get full connection info for complete state update
        const info = this.bluetoothManager.getConnectionInfo();
        this._updateStatus(info);
    }

    /**
     * Update component state from connection info
     * @private
     * @param {Object} info - Connection information object
     */
    _updateStatus(info) {
        this.state.status = info.status;
        this.state.deviceName = info.deviceName;
        this.state.lastError = info.lastError;
        this.state.reconnectAttempts = info.reconnectAttempts;
        this.state.isReconnecting = info.isReconnecting;
        this.state.timestamp = info.timestamp;

        // Check if bypassed on this device
        const posConfigId = this.props.posConfigId || 1;
        if (this.storageManager.getBypassStatus(posConfigId)) {
            this.state.status = 'bypassed';
        }
    }

    /**
     * Get CSS class for status indicator
     * @returns {string} CSS class name
     */
    get statusClass() {
        const baseClass = 'bluetooth-status-indicator';
        const statusClass = `${baseClass}-${this.state.status}`;
        const animationClass = this.state.status === 'connecting' ? 'bluetooth-status-pulse' : '';
        
        return `${baseClass} ${statusClass} ${animationClass}`.trim();
    }

    /**
     * Get icon for status indicator
     * @returns {string} Icon class name
     */
    get statusIcon() {
        switch (this.state.status) {
            case 'connected':
                return 'fa fa-bluetooth';
            case 'disconnected':
                return 'fa fa-bluetooth-b';
            case 'connecting':
                return 'fa fa-bluetooth';
            case 'bypassed':
                return 'fa fa-ban';
            case 'error':
                return 'fa fa-exclamation-triangle';
            default:
                return 'fa fa-bluetooth-b';
        }
    }

    /**
     * Get human-readable status text
     * @returns {string} Status text
     */
    get statusText() {
        switch (this.state.status) {
            case 'connected':
                return this.state.deviceName 
                    ? `Connected to ${this.state.deviceName}`
                    : 'Connected';
            case 'disconnected':
                return 'Printer Disconnected';
            case 'connecting':
                return this.state.isReconnecting
                    ? `Reconnecting... (${this.state.reconnectAttempts}/3)`
                    : 'Connecting...';
            case 'bypassed':
                return 'Printer Bypassed (Web Print)';
            case 'error':
                return 'Connection Error';
            default:
                return 'Unknown Status';
        }
    }

    /**
     * Get detailed tooltip content
     * @returns {string} Tooltip HTML content
     */
    get tooltipContent() {
        const lines = [];
        
        lines.push(`<strong>Status:</strong> ${this.statusText}`);
        
        if (this.state.deviceName) {
            lines.push(`<strong>Device:</strong> ${this.state.deviceName}`);
        }
        
        if (this.state.status === 'connecting' && this.state.isReconnecting) {
            lines.push(`<strong>Reconnect Attempts:</strong> ${this.state.reconnectAttempts}/3`);
        }
        
        if (this.state.lastError) {
            lines.push(`<strong>Last Error:</strong> ${this.state.lastError}`);
        }
        
        if (this.state.timestamp) {
            const date = new Date(this.state.timestamp);
            const timeStr = date.toLocaleTimeString();
            lines.push(`<strong>Last Update:</strong> ${timeStr}`);
        }
        
        return lines.join('<br>');
    }

    /**
     * Show tooltip
     */
    onMouseEnter() {
        this.state.showTooltip = true;
    }

    /**
     * Hide tooltip
     */
    onMouseLeave() {
        this.state.showTooltip = false;
    }

    /**
     * Handle click on status indicator
     * Opens the Bluetooth printer configuration dialog
     */
    async onClick() {
        console.log('Bluetooth status clicked:', this.state);
        
        // Open the configuration dialog
        try {
            this.dialog.add(BluetoothPrinterConfig, {
                bluetoothManager: this.bluetoothManager,
                posConfigId: this.props.posConfigId || 1,
            });
            console.log('Dialog opened successfully');
        } catch (error) {
            console.error('Failed to open dialog:', error);
            this.notification.add("Failed to open configuration dialog", {
                type: "danger"
            });
        }
    }
}

export default BluetoothConnectionStatus;