/**
 * Image Analysis Stub Tool
 *
 * Provides image analysis capabilities as stubs for future
 * integration with vision models and image processing libraries.
 */
import * as fs from 'fs';
import * as path from 'path';
import { logger } from '../utils/logger.js';
// ============================================================================
// ImageStubTool
// ============================================================================
const SUPPORTED_FORMATS = ['png', 'jpg', 'jpeg', 'gif', 'webp', 'bmp', 'svg'];
export class ImageStubTool {
    static instance = null;
    constructor() { }
    static getInstance() {
        if (!ImageStubTool.instance) {
            ImageStubTool.instance = new ImageStubTool();
        }
        return ImageStubTool.instance;
    }
    static resetInstance() {
        ImageStubTool.instance = null;
    }
    analyze(imagePath) {
        if (!this.isValidImage(imagePath)) {
            throw new Error(`Unsupported image format: ${path.extname(imagePath)}`);
        }
        let size;
        try {
            const stat = fs.statSync(imagePath);
            size = stat.size;
        }
        catch {
            // File may not exist in stub mode
        }
        const ext = path.extname(imagePath).toLowerCase().replace('.', '');
        const format = ext === 'jpg' ? 'jpeg' : ext;
        logger.debug('Image analyzed', { imagePath, format });
        return {
            description: `Image analysis of ${path.basename(imagePath)}`,
            labels: ['image', format],
            format,
            size,
        };
    }
    analyzeUrl(url) {
        logger.debug('Analyzing image URL', { url });
        // Extract format from URL
        const urlPath = new URL(url).pathname;
        const ext = path.extname(urlPath).toLowerCase().replace('.', '') || 'unknown';
        return {
            description: `Image analysis of ${url}`,
            labels: ['image', 'url', ext],
            format: ext !== 'unknown' ? ext : undefined,
        };
    }
    compare(path1, path2) {
        if (!this.isValidImage(path1)) {
            throw new Error(`Unsupported image format: ${path.extname(path1)}`);
        }
        if (!this.isValidImage(path2)) {
            throw new Error(`Unsupported image format: ${path.extname(path2)}`);
        }
        logger.debug('Comparing images', { path1, path2 });
        return {
            similarity: 0.85,
            description: `Comparison between ${path.basename(path1)} and ${path.basename(path2)}`,
        };
    }
    extractText(imagePath) {
        if (!this.isValidImage(imagePath)) {
            throw new Error(`Unsupported image format: ${path.extname(imagePath)}`);
        }
        logger.debug('OCR extraction', { imagePath });
        return `[OCR placeholder for ${path.basename(imagePath)}]`;
    }
    resize(imagePath, width, height) {
        if (!this.isValidImage(imagePath)) {
            throw new Error(`Unsupported image format: ${path.extname(imagePath)}`);
        }
        logger.debug('Resize image', { imagePath, width, height });
        const ext = path.extname(imagePath);
        const base = path.basename(imagePath, ext);
        const dir = path.dirname(imagePath);
        return path.join(dir, `${base}-${width}x${height}${ext}`);
    }
    getSupportedFormats() {
        return [...SUPPORTED_FORMATS];
    }
    isValidImage(filePath) {
        const ext = path.extname(filePath).toLowerCase().replace('.', '');
        return SUPPORTED_FORMATS.includes(ext);
    }
}
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