import BaseComponent from './base-component.js';

export default class ErrorBoundary extends BaseComponent {
    constructor() {
        super();
        this.error = null;
        this.errorInfo = null;
    }

    _getStyles() {
        return `<style>
            :host {
                display: block;
            }

            .error-container {
                padding: 2rem;
                background: #ffebee;
                border: 1px solid #f44336;
                border-radius: 8px;
                color: #c62828;
            }

            h2 {
                margin: 0 0 1rem 0;
                font-size: 1.5rem;
            }

            p {
                margin: 0 0 0.5rem 0;
                line-height: 1.6;
            }

            .error-details {
                background: rgba(0, 0, 0, 0.1);
                padding: 1rem;
                border-radius: 4px;
                font-family: monospace;
                font-size: 0.85rem;
                overflow-x: auto;
                max-height: 200px;
                overflow-y: auto;
                margin-top: 1rem;
            }

            .error-details pre {
                margin: 0;
                white-space: pre-wrap;
                word-wrap: break-word;
            }

            button {
                margin-top: 1rem;
                padding: 0.75rem 1.5rem;
                background: #f44336;
                color: white;
                border: none;
                border-radius: 4px;
                cursor: pointer;
                font-weight: 600;
            }

            button:hover {
                background: #d32f2f;
            }
        </style>`;
    }

    _getTemplate() {
        if (!this.error) {
            return '<slot></slot>';
        }

        return `
            <div class="error-container" role="alert">
                <h2>Something went wrong</h2>
                <p>${this.error.message || 'An unexpected error occurred'}</p>
                <p>Please refresh the page or contact support if the problem persists.</p>
                <div class="error-details">
                    <pre>${this.error.stack || 'No stack trace available'}</pre>
                </div>
                <button type="button" onclick="location.reload()">Reload Page</button>
            </div>
        `;
    }

    catch(error, errorInfo) {
        this.error = error;
        this.errorInfo = errorInfo;
        this.render();
        console.error('Error caught by boundary:', error, errorInfo);
    }

    reset() {
        this.error = null;
        this.errorInfo = null;
        this.render();
    }
}

customElements.define('error-boundary', ErrorBoundary);